The company JAKOB. JAKOB is the market leader in the area of mechanical tool and component clamping with its innovative and

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1 Clamping elements

2 The company JAKOB JAKOB Antriebstechnik GmbH is an internationally leading manufacturer of Sevo couplings, safety couplings, and mechanical clamping elements. For more than 30 years JAKOB has been developing and producing various types of torsionally stiff metal bellow couplings, safety couplings and planetary gearboxes for the servo drive industry. Through our history we have earned ourselves a reputation of being a reliable and competent partner in the motion control industry. JAKOB is the market leader in the area of mechanical tool and component clamping with its innovative and unique clamping technology. The JAKOB wedge clamping technology provides the highest clamping forces with low actuation torques and, at the same time, maximum operating safety. The goal of our servo and safety coupling catalog is to provide a general overview of our standard product range. More detailed information can be obtained at our Homepage Highly trained engineers and technicians at our facility in Kleinwallstadt are always ready with a solution to best meet your requirements. 2D-drawings in DXF-format or 3D-models in Step format are available for download at the corresponding side of our homepage. For special dimensions or diff erent drawing types please contact JAKOB. Telephone +49(0) , Telefax +49(0) info@jakobantriebstechnik.de

3 Directory Clamping elements I Overview page Mechanical Power clamping screw 4-5 SC wedge mechanism as force booster high clamping force at low tightening torque maximum operating safety self-locking mechanism simple manual operation Mechanical and hydromechanical Power clamping screws 6-11 MSP MSPD HSP for face plates and jaw boxes mechanical force amplifier for external clamping direction double acting version for internal and external clamping directions hydromechanical force amplifying for external clamping direction nominal clamping forces up to 750 kn low tightening torques high operating travel maximum reliability simple handling and mounting Mechanical power clamping nut MCA with blind hole thread thread protected centered operation compact design optional with Star- or rather T-grip MDA with through hole thread unlimited clamping stroke for variable clamping edges Hydromechanical clamping nut HMP HMP-HD HMG maximum clamping forces over 4000 kn multi piston system with spring return and oil activation operating pressure 700 bar up to 1200 bar custom thread available Hydromechanical spring clamping systems ZSF ZDF spring clamping cylinder (pull) spring clamping cylinder (push) mechanical clamping hydraulically released maximum operating safety leakproof and robust nominal clamping foces up to 350 kn Clamping technology - special series Clamping technology - accessories 26 27

4 Clamping technology I General Definition: Not only are the clamping tasks required in manufacturing technology versatile and numerous; the elements and systems supplied, due to the requirements placed on short setup and manufacturing times, will gain even greater importance in the future. When selecting suitable clamping equipment, reliability, cost effectiveness, user friendliness and, of course, the technical details are the most important factors. Additional aspects are increasing quality, flexibility, and ergonomics at the work place. The mechanical clamping elements from JAKOB with multiple patented power amplification systems and hydromechanical clamping systems meet the heightened requirements demanded by the user. At the same time, they provide a genuine alternative to simple, mechanical clamping equipment (steel ties, brackets, etc.) along with semi- and full automatic clamping elements, which usually have highly elaborate energy supply and control systems. With their low installation costs, the minimal operating and maintenance expenditures and the moderate procurement price, JAKOB clamping elements are often the most cost effective solution. Whether for original equipment or as retrofit elements, JAKOB clamping elements always hold tools and workpieces securely in position. Characteristics: highest clamping forces low tightening torques large operation path high operational safety clamping force controll easy installation economical clamping technology humanising of the workplace reduced danger of accidents simple manual operation or automatic mode versitite applications through a compact, flexible design Analogy to scale: Application example press tool clamp Clamping force per Element kn clamping edge h = mm T- groove width m = 28 mm Clamping nut Type: MCA M 24 Clamping force: 100 kn Holding force: 200 kn Clamping nut Type: MDA M 24 Clamping force: 100 kn Holding force: 200 kn Slide - in clamp unit Type: MES Clamping force: 60 kn Holding force: 120 kn Spring clamp cylinder Type: ZSF 6300 Clamping force: 63 kn Holding force: 63 kn 2 clamping elements

5 Clamping technology I General catagories Hydromechanical spring tension systems In the hydromechanical spring tension systems, it is especially the high reliability and low operating costs that should be emphasised. The clamping force is attached leakproof by a disk spring packet while the hydraulic pressure is required just for the release process. That means highly compact, sturdy and reliable clamping elements, such as spring clamping cylinders, spring pressure cylinders, spring clamping blocks and spring clamping nuts. The elements are just as suitable for automatic operation using hydraulic units as for manual use with a hand-lever or axial pump. Clamp hydraulics - multipiston system The multipiston system is a fave innovation in the hydraulic clamping sector. Several small thrust pistons, which are connected with each other using hydraulics, can be arranged concentrically on a circle or in any other geometric formation. The highest possible clamping forces are implemented based on a sealing is guaranteed to be leakproof up to 1500 bar. Other important benefits worth mentioning are the spring reset in the piston and the oil return during the release process. JAKOB provides several tightening nut versions based on this principle. The hydraulic pressure is normally generated manually using a hand-lever pump, but automatic operation is also possible. Clamping elements with power amplification: This clamping element group includes mechanical power clamping screws, power clamping nuts, and eccentric block type clamp. They are designed for manual operation with simple handling but at the same time with very high clamping forces. Manual tightening torque is used for clamping force monitoring. Various clamping mechanisms such as key systems, planet gears, eccentric principles and pressure distributors are used for power amplification. The sturdy design, the self-locking feature and a very high overload capacity ensure maximum reliability and long service life in this clamping element. Note: For more information about the features in the various clamping systems, please view the video clip and Power Point presentations on our website at clamping elements 3

6 Mechanical Power clamping screw I Series SC wedge mechanism as force booster high clamping forces maximum operating safety low tightening torque simple manual operation The power clamping screws of the series SC are equipped with a wedge clamping system as a force amplifier. This innovative system allows highest clamping forces with low tightening torques and simple manual operation. The robust design of all parts, the self-locking function as well as a high overload capability guarantees a maximum operational safety. The clamping screws series SC have various application possibilities, mainly in presses, punches and machine tools, as well as in jigs, fixtures and similar devices. Function: The wedge clamping system of the SC clamping screw is self-locking in each clamping position due to its geometry, and offers a clamping stroke of up to 3 mm. This way, dependent on tightening torque, very high clamping forces up to the nominal clamping force can be achieved. Clamping procedure: The infeed of the clamping screw down to a solid contact with the part to be clamped (7) is the first step, done by manually turning the housing (1) clockwise. Only then the hexagon of the actuation spindle (2) should be turned clockwise, thus moving the forced-in key (3) in axial direction and pressing the slide gores (4) in radial direction. The latter motion results in the axial stroke of the thrust piece (5) against the part to be clamped (7). The clamping force is lead over the gore bedding (6) through the housing (1) into the yoke of the clamping devise (8). After approximately two turns of the actuation hexagon the travel of the thrust piece will be blocked by an internal positive stop and the torque wrench will disengage although the required clamping force has not been generated; the clamping operation has to be repeated. The clamping travel s is indicated as optional clamping motion control. The maximal clamping position is reached when the lower cylindrical portion of the actuation hexagon is even with the top of the housing (Fig. A2). Release: The release procedure is carried out in reverse order. By turning the operating hexagon to the left up to the fixed back stop (Fig. A1), the wedge slide moves back and the clamping mechanism is released. Coil springs push the pressure piece and the wedges back into the starting position. Release position Fig. A1 max. clamping position Fig. A2 4 clamping elements

7 Mechanical Power clamping screw I Series SC Technical data and dimensions [mm]: length dimensions according to DIN ISO 2768 mh nominal max. max. max. operating SC clamping tightening clamping static path mass thread force torque stroke load s approx. D* Ø d L1 L SW 1 SW 2 Size [kn] [Nm] [mm] [kn] [mm] [kg] , ,5 M 36 x , ,5 1,1 M 48 x , ,5 2,5 M 64 x , ,5 5,3 M 80 x TR 100 x ** 65 * Further sizes and threads (inch thread) are possible on request allowed temperature range: -40 C up to +250 C ** hexagon socket - operating pin lenth: s =17 mm Notice: To ensure the required clamping force is achieved, and to protect the internal mechanism from damage, we recommend the use of a torque wrench for applying the actuation torque. With certain preconditions clamping is also acceptable with a standard wrench or socket wrench. The clamping screws are lubricated for life and maintenance free under normal operating conditions. A high temperature version up to 400 C is possible Application example: slide in clamp Series MES 3 sizes up to 100 kn clamping force flexible possible application with variable clamping edge/t-groove sizes: 18/22/28/36 Technical data on request or rather see homepage: clamping elements 5

8 Power clamping screws I series MSP/MSPD-HSP For face plates and surface plates on jarboxes as well as grinding and turning machines and specaial machines The JAKOB power clamping screws have been developed for the most exacting demands and maximum workpiece weights with an optimum operational safety. They are primarily suited for integration in jaw boxes or for direct installation in faceplates of lathes, grinding and special machines. Diverse clamping screw series with different constructions assemblies and profile requirements are available. The user can choose between a hydraulic or mechanical, and single or double action designs. All parts are made of heat-treated steel and produced in high precision, this guarantees the operator a clamping element with highest robustness and sturdiness Essential features of performance: enormous clamping force, low actuation torque maximum reliability, high rigidity large clamping stroke, high alignment accuracy simple manual operation minimized maintenance Application examples: Face plate for turning center with 8 Power clamping screws Type MSP 200 for clamping of turbine rotor up to 350 tons total weight Double action Power clamping screw Series MSPD 80 for clamping direction internal and external integrated in jaw box 6 clamping elements

9 Power clamping screws I Series MSP/MSPD-HSP Mechanical power clamping screw Series MSP/MSPD The force transmission in the mechanical power clamping screws is produced by a special mechanical key clamping system. The sophisticated geometry of the key- mechanics, have very large transmission surfaces and a self-locking action to ensure low wear and the highest reliability. Especially worth mentioning is the double-acting version, Series MSPD, with a simple automatic reverser to change clamping direction from external to internal clamping. Furthermore, its simple, manual operation and low installation outlay are worth emphasizing. When taking the main technical and economic assessment criteria into consideration, the MSP/MSPD Series can be recommended as the ideal version for most applications. Hydromechanical power clamping screw Series HSP The hydromechanical power clamping screw s operating principle is based on power multiplication, resulting from the area ratio of a primary and secondary piston. In the distinctly smaller primary piston, an internal oil pressure of up to 600 bar is generated and at the same time a long stroke distance is travelled. The secondary piston, with its larger effective area during a smaller clamping stroke produces an extremely large axial force, which is transmitted through the external thread to the piston housing on the clamping shoe. HSP power clamping screws are only provided for the external clamping direction. They excel with their long clamping strokes and low tightening torques. However, due to the necessary, mechanical safeguard (counter ring), significantly higher expenses are necessary. Note: At the calculation of installation length L1 must also take into account anybearing rings or axial washers. Basically, excepting the fitting position L1, the thread of the screw housing or the dimensions of the bearing pin can be customised to fit each customer s circumstances. That might be necessary, especially when replacing defective older model clamping screws and when retrofitting machine tools. Please get in touch with us if you have non-compliances with the standard dimensions. On request, a compression ring with electronic data transmission to a separate display module or to the machine controller can be supplied as add-on equipment. That ensures permanent clamping force monitoring during the entire processing cycle. The compression ring is made as an axial bearing disc with low width, so it can be easily integrated into the overall design. Please get in touch with us if you are interested. clamping force diagram Each clamping spindle is supplied with a clamping force diagram and a test report. On request, the appropriate clamping force diagram can be supplied on an aluminium plate for fitting to the machine, as ready information to the operating personnel. Due to friction loss in the clamping jaws or linear guides, the table or diagram values for the actuation torque must be corrected. The appropriate factor must be determined, if necesaary, by the face plate or jaw box manufacturers either empirically or based on trials & tests. Clamping force diagram MSPD 120 (max. static load 600 kn) external clamping internal clamping TA ±10% clamping elements 7

10 Mechanical Power clamping screws I Series MSP/MSPD Design and function The single acting Mechanical Power Clamping Screws of the series MSP have been developed for external clamping only, where as the double acting ones of the series MSPD for external (shafts, rollers) as well as internal clamping (pipes, bushes). These mechanical power clamping screws are equipped with a forced in key system type MKS as force magnifiers. The double acting version is equipped with an automatic changeover mechanism. This system generates high clamping forces with a simple operating procedure requiring low manual initiating torque or starting torque. The state of the art forced - in key system is extremly robust and is self locking in every clamping stage. The high system stiffness achieved thus increases also the operational safety. No additional mechanical safety devices or supports are required for supporting the threaded power clamping screws. Working over the forced - in key system an axial displacement of a pressure piece is made which presses the threaded power clamping screws along with the jaw against the work piece, and generates a clamping force proportional to the initiating torque. By changing the load direction from external to internal ; the clamping direction within the force magnifier automatically changes without the need to undertake an additional reversal of the clamping direction by hand. Correspondingly the clamping forces are passed on further; depending on the direction of clamping into the left-bearing (LH) or support with external clamping, or in the right-bearing (RH) or support with internal clamping. The reversing motion of the force magnifer and threaded power clamping screw is compensated by a compression spring which functions at the same time also as a pull back spring during unclamping. internal clamping jaw clamping direction external threaded housing pressure spring operating travel path indicator bearing support - LH bearing support - RH unclamped position max. clamped position drive spindle mechanical force magnifiler MKS Operating: External clamping The clamping jaw approaching the workpiece, is prealigned and pretensioned by turning the external hexagon SW1 with the aid of a ring or other wrench. A torque wrench should be used for force clamping and fine adjusting. By turning the internal hexagon SW2 in clockwise direction, the drive spindle is activated and a clamping force is generated proportional to the starting torque until the torque wrench disengages upon reaching the preselected torque (see clamping force diagram). The clamping stroke can be controlled via a operating path indicator. The clamping procedure has to be repeated by slacking with SW2 and a possible pretensioning with SW1 if the preselected starting torque has not been attained until the end of the operating path. Avoid exceeding the maximum starting torque as it may cause damages. Internal clamping The clamping jaw approaches the workpiece, is prealigned and pretensioned by turning the external hexagon SW1 in an counter-clockwise direction with a ring or other wrench. This automatically activates the change-over to internal clamping. For this changeover the threaded housing of the power clamping screw with the jaw is maintained in a preloaded state and then subjected to an axial motion in the reverse direction, i.e. the external hexagon SW1 should be turned by approx. one turn additionally. The power clamping with internal hexagon SW2 is then done in a similar manner as the external clamping procedure. Release Release is effected in reverse order. By turning the hexagon SW2 in an counter-clockwise direction until the rear stop. The drive spindle is reversed and the clamping system unclamped. The pressure spring pushes the threaded spindle with clamping jaw back, the force amplifier returns to its initial position. 8 clamping elements

11 Mechanical Power clamping screws I Series MSP/MSPD Series MSP - Mechanical power clamping screw for clamping direction external Series MSPD - Mechanical power clamping screw for two clamping directions internal and external operating travel Installation length ISO- trapezoidal thread left hand - single start internal external Material: heat treated steel nitro carbonized Technical data and dimensions [mm]: length dimensions according to DIN ISO 2768 mh MSP/MSPD Size ISO-trapezoidal thread left TR 65x4 TR 80x5 TR 100x6 TR 120x6 TR 160x8 TR 200x10 nominal clamping force external [kn] internal nominal actuation torque [Nm] max. static load [kn] stroke h [mm] 2, operating travel s [mm] hexagon external SW Internal SW a b / c Ø d1 / d3 f7 45 / Ø d2 / d4 55 / MSPD - L1 min MSPD - L2 min MSP - L1 min MSP - L2 min Notice: Special thread sizes or customized dimensions are possible on request. Sizes 120 / 160 / 200 are also available with stronger clamping force amplifier. Ordering example: MSPD TR 100 x 6 - lh - L1 = 300 mm clamping elements 9

12 Hydromechanical Power clamping screws I Series HSP Design and function The hydromechanical power clamping screw type HSP is single acting for external clamping operation (shafts, rollers, etc.). The force i. e. pressure is generated by compression of a confined oil volume with the primary piston. The force magnification results from the surface ratio between the primary and secondary piston. By turning the drive spindle in the right hand direction (clockwise), the primary piston makes a linear motion compressing the oil within the confined area. The oil pressure thus generated acts over the larger surfaces of the secondary pisten and pushes the threaded spindle with the mounted jaw against the workpiece to be clamped. A clamping force is generated proportionally to the actuation torque applied. The clamping stroke can be read of the clamping stroke indicator. After completion of the clamping procedure the clamping screw should be secured against overload by means of the mechanical safety devise (adjusted gear wheel), which at the same times helps to achieve a high degree of stiffnes. A high value of stiffness is also achieved due to the direction force transfer into the supporting bearing. clamping jaw mechanical safety devise clamping direction external spindle housing drive spindle pressure spring sekundary piston primary piston path indicator (Size 120/160/200/220) operating path stroke path indicator (Size 80/100) release position max. clamping position release position max. clamping position Operating: Clamping The clamping jaw approaching the workpiece is prealigned and pretensioned by turning the external hexagon SW 1 with the aid of a ring or socket spanner. A torque wrench should be used for force clamping and fine adjusting. The clamping force is proportional to the internal oil pressure which in turn is dependant on the actuation torque applied. In step 2 the clamping force is generated by turning the hexagon socket SW 2 in the right hand direction (clockwise) with a torque wrench. The required clamping force is attained when the torque wrench slips at the preset value (refer clamping force diagram). In order to prevent damage due to overload; the maximum tightenig torque as specified must not be exceeded. If the full clamping stroke is used up an inner stop is reached, and the torque wrench disengages without generating the required clamping force. A motion proportional to the clamping stroke is made by the position indicator which is visible in the window next to the hexagon socket SW 1. Safety precaution To safeguard against the possible loss of hydraulic pressure and the same time increase the overall stiffness a mechanical safety devise (adjustig gearwheel) is used. By turning the hexagon socket SW 3 to the right (clockwise) and adjustable gear - wheel is operated over a pinion shaft and engaged with the gear on the screw (see above sketch) housing. This safety measure ensures that in the case of a drop in pressure eg. due to leakage in the system the lower clamping screw is still secured. The static load is directly transmitted to the supporting bearing. The pinion shaft SW 3 is not within the scope of supply. Unclamping By turning the hexagon socket SW 3 to the left (counter clockwise) the mechanical safety devise is released. Should the turning back of the gear be verry dificult, then the pressure of the hydraulic system should be increased by first turning the hexagonal allowing to be loosened. After that the clamping jaw can be moved by turning the hexagon socket SW 1 anticlockwise with a ringspanner. The compression spring, exerts a continuous thrust on the hydraulic system, as well as exerts a return motion on the power clamping screw and jaw during the unclamping operation. 10 clamping elements

13 Hydromechanical Power clamping screws I Series HSP Installation length ISO- trapezoidal thread left hand - single start gearwheel external Technical data and dimensions [mm]: length dimensions according to DIN ISO 2768 mh HSP size ISO-trapezoidal thread left TR 80x5 TR 100x6 TR 120x6 TR 160x8 TR 200x10 TR220x10 nominal clamping force [kn] nominal tightening torque [Nm] max. static load [kn] stroke h [mm] operating path s [mm] hexagon external SW internal SW a b c Ø do 71, module m 1,25 1,5 1, Ø d1 f Ø d Ø d3 f Ø d e f g LG min L1 min Note: Special thread sizes or customized dimensions as well as different toothing of counter gearwheel or series with higher clamping force are possible on request. Ordering example: HSP TR 100 x 6 - lh - L1 = 300 mm clamping elements 11

14 Mechanical power clamping nut I Series MCA/MDA maximum clamping forces through force magnification simple, manual operation low tightening torques high operation safety through self locking corrosion - resisting, robust, up to 400 C The salient design feature of the series MCA and MDA is an integral transmission gear for the multiplication of the manual tightening torque. With this, the user has a sturdy and flexible clamping element, which enables highest clamping forces with simple manual operating and maximum operating safety. The Series MCA is designed with bottomed thread and centered hexagon, the Series MDA is a trough hole thread and sidewise staggered hexagon design. The power clamping nut can be used for various clamping tasks throughout the machine tool industry, particularly for the clamping in presses and punches. Function and handling: After manually feeding the clamping nut up to the facing, the drive pinion is activated through a right-hand turn of the actuation hexagon SW 1 or SW 2. The gearbox ratio tightens the torque with a high multiple and the rotation of the threaded nut produces the clamping stroke of the threaded tension bolt. The clamp force is built up depending on the actuation torque. Self-locking is guaranteed in every clamping position. To reliably ensure the necessary clamp force on the one hand and to protect the clamping mechanism from damage caused by excessive tightening torques on the other, the use of a torque wrench is recommended. In certain circumstances, clamping with the help of normal box spanners, angle wrenches and ratchet spanners could be acceptable. Make sure that the threaded-down stud bolts are fixated; i.e., that they cannot be turned. The power clamping nuts are maintenance-free under normal operating conditions. The tempered steel housing and threaded nut are corrosion protected through surface-nitriding. Available options: High temperature version up to T = 400 C (e.g. forging presses) Corrosion resistant version for critical ambient conditions With additional latch mechanism for automatic switch over to the power clamping mode for fast feeding or in a lowered layout (standard in types MCA 60, MCA-T, MCA-S) Lubrication with food grease for the food industry, laboratory area, etc. With additional grease nipple for re-lubrication Second actuating hexagon (only type MDA) Delivery including torque wrench or operating tools (see Accessories, Page 27) Application example: MCA-power clamping nut for clamping of upper and lower die in a hydraulic press. 12 clamping elements

15 Mechanical power clamping nut I Series MCA with bottomed thread thread protected centered operation compact Design Table surface T-slot screw DIN 787 to M24: 10.9/12.9 from M30: 8.8 Technical data and dimensions [mm]: length dimensions according to DIN ISO 2768 mh nominal nominal max. MCA clamping thread DIN 650 weight screw-in depth tightening static T-slot force D* torque load m H approx. Øa Ød1 Ød2 L t SW 1 w Size [kn] [Nm] [kn] min/max [kg] min max M / M / 24 0, M / 29 M / M / 29 M / 36 1, M / 46 M / 36 2, M / 46 2,4 M / 53 2, M / 59 2,2 M / 53 4,9 M / 59 4, M / 66 4, M ,5 M ,3 * Proberty class of threaded bolt up to M 24 minimum Q 10.9; from M 30 Q 8.8 (further thread sizes i. e. inches on request) max. allowed temperature range: -30 C up to +200 C Note: For optical control of actual screw-in depth of th T-bolt two grooves have been provided on the housing circumference matching tmin and tmax. When laying out the actual screw-in depth of the threaded bolt, the necessary stroke must be considered i. e. the max. specified screw-in depth must be reduced at least by amount the stroke. Ordering example: Clamping nut MCA M 24 incl. T-bolt MCA Series and size Thread size or rather T-slot dimension DIN 650 (m = 36 mm) Clamping high (h = 60 mm) Size of T-slot (H = 40 mm) clamping elements 13

16 Mechanical power clamping nut I Series MDA with through hole thread for variable clamping edges unlimited clamping stroke Table surface T-slot screw DIN 787 to M24: 10.9/12.9 from M30: 8.8 Technical data and dimensions [mm]: length dimensions according to DIN ISO 2768 mh nominal nominal max. MDA clamping thread DIN 650 tightening static T-slot weight force D* torque load m H approx. Øa Ød1 Ød2 e L t min SW1 / SW2 w Size [kn] [Nm] [kn] min/max [kg] outside / inside M / 24 2,9 M / 29 2,9 M / 36 2,8 M / 46 2,8 M / 36 5,2 M / 46 5,0 M / 53 4,9 M / 59 4,8 M / 66 4, , , * Proberty class of threaded bolt up to M 24 minimum Q 10.9; from M 30 Q 8.8 (further thread sizes i. e. inches on request) max. allowed temperature range: -30 C up to +200 C Application example: Clamping nut MDA for clamping of chain wheels during milling. Ordering example: Clamping nut MDA M 24 Series and size Thread size or rather T-slot dimension DIN 650 (m = 36 mm) Clamping high (h = 60 mm) Size of T-slot (H = 40 mm) 14 clamping elements

17 Mechanical power clamping nut I Series MCA-S/MCA-T simple, manual operating with handle fast infeed motion due to automatic change over Ratched Ratched clamping nut MCA-S wit star grip clamping nut MCA-T with T- grip Technical data and dimensions [mm]: length dimensions according to DIN ISO 2768 mh nominal max static screw in depth weight Series clamping force thread load tmin tmax approx. [kn] [kn] [mm] [kg] M MCA-S M ,0 MCA-T M M Notice: Property class of threaded bolt should be at least Q10.9. Sizes of thread larger than M 16, should used a property class of Q 12.9, or the max. static load must be reduced. For optical control of actual screw-in depth of the T-bolt two grooves have been provided on the housing circumference matching tmin and tmax. When laying out the actual screw-in depth of the threaded bolt, the necessary stroke must be considered i. e. the max. specified screw-in depth must be reduced at least by amount the stroke. Application example: MCA-T-clamping nut for adjustment of test bench sliding table Ordering example: MCA-S - M 16 / MCA-T - M 20 clamping elements 15

18 Hydromechanical power clamping nut I general JAKOB hydromechanical power clamping nuts of series HM are designed for maximum clamping forces and to address the highest demands concerning reliability, operating comfort and product quality. The innovative multi- forcer piston system offers many advantages compared to convenrional ring hub designs. The user can chose from severed standard models, customized versions are also available. The JAKOB clamping nuts can solve many clamping problems in all industries, incuding machine building, the steel industry, in refinerys, in chemical plants till powerhouse and off- shore. Functional principle multi-forcer-system: The JAKOB multipiston system is a genuine innovation in the hydraulic clamping sector. The main design feature is a ring-shaped cylinder housing with internal threads. Several small thrust pistons are arranged concentrically on its base. The individual piston bores are connected hydraulically using a special tangential relief cut. A patent has been registered for this principle. The pressurisation is carried out either via a high-pressure connection or a quick-action coupling using a hand-foot operated pump or a hydraulic unit, or as an independent system by threading down a pressure screw. The piston seals guarantees a permanent leakproof design without pressure drops up to 1500 bar, even during long-term operation. Maximum reliability can be achieved with an additional counter or blocking ring. Using return springs, when each individual piston is released, it rotates back into the home position and the hydraulic oil is returned to the pump without leaking. The ring nut in robust cage design guarantees the greatest stiffness and minimum material expansion, even under maximum pressure loads. The multipiston system always permits base element design in any geometric form, whether as a ring segment or as a rectangular block housing. That means even highly unusual clamping problems can be solved. 16 clamping elements

19 Hydromechanical power clamping nut I general Special characteristics: highest clamping forces large operating path simple manual operating with clamping force control maximal reliability with counter ring no torsional and lateral forces by clamping compensation of uneven surfaces spring return of hubs leak proof oil refeed compact robust corrosion-resistant HMG HMP HMP-HD Series Clamping force high high very high Nominal pressure PSI PSI PSI ( 700 bar ) ( 700 bar ) ( 1200 bar ) Operating stroke 1-2 mm max. 8 mm max. 8 mm manual manual / automatic manual / automatic Operating mode actuation by hand-foot-pump hand-foot-pump hexagon key aggregate aggregate Hydraulic connection self- contained G 1/8 - screwed joint G 1/4 -hydraulic trip coupling Clamping forceor pressure controll Indicator Manometer Manometer Counter-ring optional optional required Dimension very compact very compact compact Notice: The power clamping nuts Series HMP and HMP-HD are generally equipped with a radial and axial hydraulic connection plus a high-pressure connection nipple and a plug screw. The corresponding hydraulic couplings, high-pressure hoses with variable lengths, hand-foot operated pumps or electric pumps and fittings can be supplied on request. Please turn to Page 27 for hand-foot operated pumps and other accessories. clamping elements 17

20 Hydromechanical power clamping nut I Series HMP multi forcer system for high clamping forces leak proof oil refead into pump and spring return of cylinders high-pressure adapter (axial/radial) for hand- or foot-pump up to 700 bar optional with counter ring (mechanical safety) for maximum reliability high-pressure adapter Material: heat treated steel nitro carbonized Technical data and dimensions [mm]: length dimensions according to DIN ISO 2768 mh HMP clamping force* thread operating travel Size (PN=700bar) ØGmax s max Ø Da H Ø d1 Ø d2 Ø K HK mass** approx. [kg] [kn] , [kn] [kn] [kn] , [kn] , [kn] [kn] , [kn] [kn] [kn] [kn] [kn] [kn] * maximum permissible operating pressure Pmax = 1000 bar ** declaration of weight for Ø Gmax without counter ring Operating instructions: The HMP series is provided with a special high-pressure screw coupling. The connection nipple is implemented with a nonreturn valve; the coupler with an actuating lever. That enables coupling and decoupling even at maximum hydraulic pressure. Pressurisation is also permanently maintained throughout the entire clamping operation. The counter- ring option provides additional security. For the HMP-HD version with a quick-action coupling, the counter ring is standard. Ordering example: Hydromechanical power clamping nut HMP M82 x 2 - a HMP K - TR250 x 5 - a size optional with counter ring thread size position of high-pressure adapter standard version a axial (optional s sidewise or rather a/s) 18 clamping elements

21 Hydromechanical power clamping nut I Series HMP-HD Multi forcer system heavy duty - design for highest clamping forces leak proof oil refead into pump and spring return of hubs quick-lock coupling (axial/radial) for hand- or foot-pump up to 1500 bar general with counter ring (mechanical safety) for maximum reliability high-pressure adapter Material: heat treated steel nitro carbonized Technical data and dimensions [mm]: length dimensions according to DIN ISO 2768 mh HMP-HD clamping force* thread operating travel mass** Ø Da H Ø d1 Ø d2 Ø K-1 HK Size (PN=1200bar) ØG max s max approx. [kg] [kn] [kn] [kn] , [kn] [kn] , [kn] [kn] [kn] [kn] [kn] [kn] [kn] [kn] * maximum permissible operating pressure Pmax = 1500 bar ** declaration of weight Ø Gmax Operating instructions: For the clamping process, the HMP-HD series is equipped with a user-friendly quick-action coupling. After pressure build-up and after securing with the counter ring, the hydraulic pressure is relieved. For clamping operation, the coupler is separated together with the connection line. For the release process, the hydraulic connection is re-coupled, the pressure is applied, the counter ring is released, and the pressure is bled off. Ordering example: Hydromechanical power clamping nut HMP-HD TR 250 x 5 - a size thread size position of hydraulic clutch standard version a axial (optional s sidewise or rather a/s) clamping elements 19

22 Hydromechanical power clamping nut I Series HMG multi forcer system for high clamping forces self contained system without access line for simple, manual clamping clamping force control via pressure gauge - spring return of hubs optional with counter ring (mechanical safety) for maximum reliability Material: heat treated steel nitro carbonized Pressure gauge: normal position - pressure-less maximum position at nominal pressure bar Technical data and dimensions [mm]: length dimensions according to DIN ISO 2768 mh HMG clamping force* thread operating travel mass*** Ø Da** H Ø d1 Ø d2 Ø K HK Size (PN=700bar) ØGmax s max approx. [kg] [kn] 60 1, , [kn] 80 1, [kn] 100 1, [kn] 125 1, , [kn] 150 1, , [kn] 175 1, [kn] 200 1, ,5 * maximum permissible operating pressure 800 bar ** external diameter nut housing without counter ring *** weight specification for Ø Gmax without counter ring Note: standard size 60 up to with one feed hub and size up to 200 with two feed hub (180 displaced) the tightening torque (SW 6) for maximum clamping force is approx. 25 Nm Ordering example: Hydromechanical power clamping nut HMG M82 x 2 HMG K - TR200 x 5 Size optional with counter ring thread size 20 clamping elements

23 Hydromechanical power clamping nut I Application examples Application example HMP Permanently installed hydraulic nut as a simpleaction clamping cylinder with a return spring. Fastened through internal and external threads With aggregate connection for automatic operation Application example HMP-K Tool clamp for clamping saw blades, milling discs, etc. With counter or block nut for maximum reliability Nut and counter ring thread in left-hand design Application example HMP-HD Clamping appliance comprising hydraulic nut with bell support for frictionless pre-clamping generation of threaded connections Defined clamping with high precision up to the load limit of the tie rod Application example HMP-B Special model made as hydromechanical clamping screw with threaded pivot Thread diameter and thread length according to customer specification Eleminates bothersome, fixed stay bolts Application example HMG Workpiece clamping for milling chain sheaves with high machining forces Independent system without connection lines for simple, manual clamping Clamping force monitoring with a pressure indicator clamping elements 21

24 Hydro-mechanical spring clamping systems I Series ZSF/ZDF mechanical clamping - hydraulic releasing high operation safety, leakproof and robust economical clamping solution General The hydromechanical spring tension systems work interactively mechanical-hydraulic. The clamp force is applied mechanically through a pre-stressed disk spring packet. Two types are fundamentally provided as spring clamping or spring pressure cylinders. The hydraulic pressure is only required for the element release stroke during which the tie rod or thrust pin is aired. This system guarantees great reliability because the clamping force is maintained to the full extent independent of the oil pressure or leaklosses. With the hydraulic unit s short operating times, this system is also advantageous from the point of view of cost effectiveness. The spring clamping cylinders in the ZSF and ZDF series provide sturdy and reliable clamping elements that can be used wherever sliding and movable machine parts need to be temporarily clamped or arrested. Other applications are fixture construction and workpiece or tool clamping. Prinzipal of Operation The thrust or draw piston is pressurised reciprocally by the disk spring packet or the hydraulic pressure. That means the spring packet is compressed with increasing oil pressure; the spring force increases. At the setting pressure, the corresponding nominal clamping force is reached as a reaction force of the disk spring packet. To release the thrust or draw piston, a higher hydraulic pressure is required, which, up to a maximum value, is proportional to the release stroke. That means the setting pressure is only needed for precise force adjustment during the initial installation. During the actual operating cycle, the cylinders are either pressureless or are driven with release pressure. The corresponding pressure values can be seen in the table. In ZSF series spring clamping cylinders, an expanding mandrel or a tie rod is threaded down and secured in the draw piston s tapped hole (available on request as single piece or with special thread). The draw piston is protected against incorrect installation with a pin connection. Assembly and adjustment To operate, a hydraulic unit is needed which should be equipped with a manometer, a pressure cut-off valve, a solenoid valve and a pressure switch unit. Fill the cylinders and lines at low pressure and bleed (cylinders are supplied unfilled). Increase the system pressure to the set pressure and maintain; align cylinder using the ring guide nut (ZSF), setscrews (ZDF-u) or fitting discs (ZDF-o) until the thrust piston or the clamp lies free of play; fasten thrust piston with screws or secure the ring guide nut on the clamping cylinder. Relieve system pressure; set release pressure for the required release stroke; check the release stroke and adjust if necessary. Manometer bleed screw spring clamping cylinder (pull) ring-nut hand lever pump hydraulic trip coupling slide machine bed tie anchor with clamping piece Note: If automatic clamping operation is not required, the temporary, manual hydraulic connection to a manually operated piston pump with a manometer provides a cost effective alternative (see Figure at left). 22 clamping elements

25 Spring clamping cylinder I Series ZSF Technical data: nominal adjusting max. release release pressure release pressure release pressure stroke volume mass ZSF clamping force pressure stroke a t 0,5 mm stroke at 1,0 mm stroke at max stroke at 1 mm stroke approx. Size [kn] [bar] [mm] [bar] [bar] [bar] [cm³] [kg] , ,3 2, , ,0 3, , ,8 4, , ,8 6, , ,0 8, , , , ,3 26, , , , ,1 60 temperature range: -30 C up to +100 C mounting position : discretionary bleed screw Material: - heat-treated steel black finish at adjusting pressure Dimensions: (mm) length dimensions according to DIN ISO 2768 mh ZSF Ø D f7 Version-2 adjusting thread Ø a Ø b Ø c e f g L M t v Size Ø D f7 - ring nut M 14 x 1, M 58 x 1, M 18 x 1, M 68 x 1, M 22 x 1, M 78 x 1, M 30 x 1, M 92 x 1, ,5 150 M 30 x 1, M 102 x 1, M 38 x 1, M 140 x M 45 x 1, M 148 x M 45 x 1, M 168 x M 52 x 1, M 198 x 3 Note to version-2: The sizes to are available alternatively with smaller external diameter D cylinder housing according to column -2. Ordering example: ZSF / ZSF clamping elements 23

26 Spring clamping cylinder I Series ZDF-o mechanical clamping hydraulic releasing high operation safety, leakproof and robust temperature range: -30 C up to +100 C mounting position discretionary Technical data: nominal adjusting release pressure release pressure stroke volume mass ZDF-o clamping force pressure at 0,5 mm stroke at 1,0 mm stroke at 1 mm stroke approx. size [kn] [bar] [bar] [bar] [cm³] [kg] , , Material: heat. treated steel black finished or rather nitrocarburized Dimensions: (mm) length dimensions according to DIN ISO 2768 mh ZDF-o Ø D Ø a Ø b Ø c Ø e g h L n , , , , , Ordering example: ZDF-o clamping elements

27 Spring clamping cylinder I Series ZDF-u mechanical clamping hydraulic releasing high operation safety, leakproof and robust temperature range: -30 C up to +100 C mounting position discretionary Technical data: nominal adjusting max. release release pressure release pressure release pressure stroke volume mass ZDF-u clamping force pressure stroke at 0,5 mm stroke at 1,0 mm stroke at max. stroke at 1 mm stroke approx. Size [kn] [bar] [mm] [bar] [bar] [bar] [cm³] [kg] , ,0 3, , ,3 5, , , , , , at adjusting pressure 3x setting screw bleed screw Material: heat. treated steel black finished or rather nitrocarburized Dimensions: (mm) length dimensions according to DIN ISO 2768 mh ZDF-u Ø D Ø a Ø b Ø c Ø e g h L m n , , , , Ordering example: ZDF-u clamping elements 25

28 Camping technics I Special Series Power clamping nut Series MCG function as Power clamping nut with threaded pin M12 up to M64 centered operation compakt design 4 sizes up to 200 kn no bothersome, fixed stay bolts Torque limitation - DRG torque limitation - slip-function when tightened higher torque required for untightening forces the devise open size 1 with star grip size 2 with T- grip alternatively with threaded hole or with threaded pin torque limitation 3-15 Nm Spring clamping ledge - FSL mechanical clamping hydraulic releasing optimal power dispersion throgh plane clamping length variable various T-slot-sizes automatic or manual operating possible Eccentric block-type clamp - EBS flexible, robust and compactt simple handling - quick action clamp system high operating reliability by self-locking variable clamping height 2 sizes with kn clamping force 26 clamping elements

29 Clamping technics I accessories torque wrench with focusing scale automatic releasing (click effect) with change-over ratchet 1/2 inclusive hexagonal insert Size 1: Nm Size 2: Nm Size 3: Nm work tools Ring, socket and hexagon tools hook wrench ratchet and ratchet wrench hydraulic load cell compact design, for support of length variable distance pieces for force measurement between two clamping claws Size 1: 300 kn - Da=Ø105 Size 2: 600 kn - Da=Ø140 distance pieces on request hand lever pump inclusive oil tank and pressure manometer Size 1: 700 bar Size 2: 1500 bar hydraulic - high pressure accessories high pressure tubes scram coupling, fitting, adapter manometer, pressure indicator fitting grease for lubrication of highly stressed mechanic components as MSPforce magnifier, gear wheels, g tube clamping elements 27

30 product overview I Servo- and Safety couplings Metal bellows couplings Elastomer couplings Clawcouplings Miniature couplings Distance couplings cardan shaft Savety couplings Overload couplings Please ask for our drive technology-catalogue. 28 clamping elements

31 So you find us industrial area Kleinwallstadt from direction Aschaffenburg A3/A45 Daimler Ring Siemensstraße Dieselstraße Kleinwallstadt Daimler Ring 42 Mil 25, Elsenfelder Straße GPS-dates: latitude : , longitude: B469 industrial area Kleinwallstadt Obernburg Elsenfeld from direction Rohrbrunn A3 from direction Miltenberg Daimler Ring 42, Industriegebiet D Kleinwallstadt Telefon +49(0) Telefax +49(0) Internet info@jakobantriebstechnik.de

32 OTT-Jakob Spanntechnik GmbH Industriestr Lengenwang Fon: (+49) Fax: (+49) T+S-Jakob GmbH & Co. KG Ressestr Pfronten Fon: (+49) Fax: (+49) info@ts-jakob.de ALLMATIC-Jakob Spannsysteme GmbH Jägermühle Unterthingau Fon: (+49) Fax: (+49) info@allmatic.de JAKOB Antriebstechnik GmbH Daimler Ring Kleinwallstadt Fon: (+49) Fax: (+49) info@jakobantriebstechnik.de GPA-Jakob Pressenautomation GmbH Greschbachstr Karlsruhe Fon: (+49) Fax: (+49) info@gpa-jakob.de OPTIMA Spanntechnik GmbH Postfach Scheuerfeld Fon: (+49) Fax: (+49) info@optima-spanntechnik.de JAKOB Vakuumtechnik GmbH Daimler Ring Kleinwallstadt Fon: (+49) Fax: (+49) info@jakobvakuumtechnik.de Stand 06/2010