Measurement and Standards

Transcription

1 TM Measurement and Standards Technical Data PWM Group LLC Non-Contact Systems Contact Systems Step Gages Gage Blocks Step-gage, Check-plate, Gage Blocks, Accessories, Ball Cube, Ball Bar, Sphere Beam, Optima, Opto-Tactile, Measurement, Standards, Reference, Masters, Calibration, Step-gage, Check-plate, Gage Blocks, Accessories, Ball Cube, Ball Bar, Sphere Beam, Optima, OptoTactile, Measurement, Standards, Reference, Masters, Calibration, Step-gage, Check-plate, Gage Blocks, Accessories, Ball Cube, Ball Bar, Sphere Beam, Optima, Opto-Tactile, Measurement, Standards, Reference, Masters, Calibration, Step-gage, Check-plate, Gage Blocks, Accessories, Ball Cube, Ball Bar, Sphere Beam, Optima, Opto-Tactile, Measurement, Standards, Reference, Masters, Calibration, Step-gage, Check-plate, Gage Blocks, Accessories, Ball Cube, Ball Bar, Sphere Beam, Optima, OptoTactile, Measurement, Standards, Reference, Masters, Calibration, Step-gage, Check-plate, Gage Blocks, Accessories, 1

2 Measurement and Standards About Us Technical Data Gage Blocks Step Gages Contact Systems Non-Contact Systems When it comes to accuracy, our Measurement Standards have set the standard and been adopted in many industrialized nations. Manufactured in Germany, these standards provide precision methods of assuring measurement integrity. PWM Group LLC., Warren, Michigan Our Other Products American Modular Tooling Styli and Accessories Paul Marino An ideal addition to lean, efficient methods of lean manufacturing and high accuracy framing. Standard and custom styli and accessories for all major probing, reference and locating systems

3 Measurement and Standards Table of Contents Technical Data 4 6 Gage Blocks and Accessories 7 30 Gage Blocks and Gage Block Sets Available in steel, ceramic or carbide, in grades K, 0, 1 or 2 Gage Block Accessories For the proper holding, handling and care of gage blocks Step Gage A system for the periodic monitoring of coordinate measuring machines Artifacts Suitable for Contact Systems Ball Plate A complete system for the monitoring of coordinate measuring machines Sphere Beam A non-demountable ball bar for monitoring and calibration of medium volume coordinate measuring machines Ball Bar A monitoring system the period calibration of large volume coordinate measuring machines Q3 Ball Cube A quick monitoring system for coordinate measuring machines Artifacts Suitable for Non-Contact Systems Opto-Tactile Standards Calibration standards for monitoring optical and tactile coordinate measuring instruments Optima Scale System A master artifact for acceptance testing and interval monitoring of optical measuring instruments Non-Contact Systems Contact Systems Step Gages Gage Blocks Technical Data 3

4 Measurement and Standards General Technical Data and Notes Technical Data Gage Blocks Step Gages Contact Systems Non-Contact Systems Certification Options Step Gage DKD U = 0.1µm x 10-6 x L NIST Available by inquiry only PTB n/a Works U = 0.3µm x 10-6 x L Check Plate DKD U = 0.12µm x 10-6 x L NIST Available by inquiry only PTB On Request Works Q3 Ball Cube U = 0.4µm x 10-6 x L (1050mm) U = 0.9µm x 10-6 x L (all others) DKD U = 0.5µm x 10-6 x L NIST Available by inquiry only PTB On Request Works U = 0.8µm x 10-6 x L Sphere Beam DKD 1 U = 0.3µm x 10-6 x L DKD 2 U = 0.8µm x 10-6 x L NIST Available by inquiry only Works Available by inquiry only Ball Bar DKD U = 0.8µm x 10-6 x L NIST Available by inquiry only PTB U = 1.0µm x 10-6 x L Works U = 1.2µm x 10-6 x L Optima DKD U = 8.0µm NIST Available by inquiry only PTB Available by inquiry only Works U = 8.0µm L = the distance between any measuring faces, in meters Note: Certification is not included in the cost of gages. If needed, please add a certification option to your request for quote or purchase order

5 Measurement and Standards General Technical Data and Notes VDI / VDE: a standards specification, similar to ANSI PTB / DKD: European standards institutes, similar to NIST (National Institute of Standards and Technology) Physikalish-Technische Bundesanstalt Deutschen Kalibrierdienst The metal is aged and hardened to maintain accuracy. The aging process is used to eliminate internal stresses and align the molecular polarity of the metal. This is done through a chemical process or by burying the block or plate for a period of time. Rolls Royce used a similar process for their crankshafts and camshafts. A thermal process is used for setting in castellations and spheres. The block or plate is frozen to contract the metal, the castellations or spheres are set in, then it is returned to room temperature at which point heat expansion locks the castellations or spheres into place. SOLUTIONS How it works Periodic monitoring of hand-operated or computer-controlled coordinate measuring machines is carried out on the basis of calibrated mechanical test pieces. Appropriate selection and combination of various test pieces, such as spheres, graduated gage blocks and sphere plates, and their arrangement, make it possible to discover the overall measured volume or particular partial measured volumes corresponding to a typical work piece size and adapt the test to its most important measurement job. The process control is done uniformly in accordance with the nominal data of a test piece. Numeric and graphic evaluation is carried out for each type of test piece with a uniform program and is assessed by trained personnel. Summary characteristic values give an overview of the current level of accuracy and long-term tendencies. In this way the use of coordinate measuring instruments can be optimized and their downtime minimized without high expense. Non-Contact Systems Contact Systems Step Gages Gage Blocks Technical Data 5

6 Measurement and Standards Kolb and Baumann ITI Check Software Evaluation Program Used for DKD Calibration of CMM with Approval of the PTB Technical Data Gage Blocks Step Gages Contact Systems Non-Contact Systems Part Number KOB-SOFTITI-CKFV KOB-SOFTITI-CKLITE Full Version Capabilities Description Full Version Manages any number of CMMs Lite Version, limited to one type of artifact only Manages up to 999 inspection per CMM with up to 7 individual measurements per inspection Reads almost any ASCII measuring file Alternative evaluation according to VDI/VDE 2617 or ISO Probe system validation with Ring Gage standards (3 x 12 points) Probe system validation with Sphere standard (3 x 17 or 1 x 25 points) Scanning test with a Sphere Evaluation of Gage Block Measurements: Deviation from Length Coupling of up to six staggered measurements Evaluation considers the calibration uncertainty of the gage block Calculates global correction parameters for CMM scales and angles between CMM axes Evaluation of Step Gage Measurements: Deviation from Length and Position Coupling of up to six staggered measurements Evaluation considers the calibration uncertainty of the Step Gage Calculates global correction parameters for CMM scales and angles between CMM axes Evaluation of Sphere Plate Measurements: Deviation from Length and Position Evaluation considers the calibration uncertainty of the Sphere Plate Calculates global correction parameters for CMM scales and angles between CMM axes Evaluates measurement capability from Sphere Plate measurement Evaluation of Cone and/or Ball Bar Measurements: Deviation from Length and Position Coupling of up to six staggered measurements Evaluation considers the calibration uncertainty of the Ball Bar Calculates global correction parameters for CMM scales and angles between CMM axes Evaluates measurement capability from Ball Bar measurements Lite Version Capabilities: All capabilities of the Full Version but is limited to one type of artifact only, selected by customer at time of purchase

7 Measurement Measurement and Standards: Step Gages A Complete System for Monitoring Coordinate Measuring Machines. Non-Contact Systems Contact Systems Step Gages Gage Blocks Technical Data

8 Technical Data Gage Blocks Step Gages Contact Systems Non-Contact Systems Step Gages, At a Glance Available in five standard lengths: 420, 620, 1020, 1540 and 2020mm The gage body is manufactured using special steel, stabilized by a long aging process which provides dimensional stability. Material expansion is U = 11.5 x 10-6 / 6 C Distortion-free support of the gaging cylinder faces is accomplished by a patented, machined form shaped to hold each cylinder firmly in its installed position. The unique form of the KOBA-step body configuration produces identical principal planes that provide the neutral bend feature at specified, marked bearing points along the gage body. The gage blocks and faces are cylindrical in form with lapped faces on either end of the cylinder. As the cylinder approaches the gaging surface it is tapered to allow easy access for measurement and cleaning of the gage faces. Ceramic gage blocks Gage faces are spaced in 20mm nominal increments. The diameter of the gage faces is 5mm. Gage cylinders are available in either steel or ceramic. Gage faces are not set to exact nominal positions for measurement this provides higher testing variation against a certified nominal database. KOBA sources for certification are PTB, NIST, DKD and Works (in-house). Access for probing gage faces is available through: a) holes on the side of the body, b) the longitudinal groove or c) at either open end of the gage body. KOBA-step is ideal for horizontal and vertical quills operating from under-the-table type machines. Gage faces are held along the center line fiber of the gage body which allows the gage to be held horizontally, vertically or on various inclines without spacing deformation, this is accomplished through the gages neutral-bend body design. The swivel base option provides proper clamping and support at bearing points and allows angular positions to be made quickly. Leveling feet and handles provide fast and safe set-ups Purpose-built transport containers minimize the risk of damage during transportation. Also available in a mini version for users of smaller CMMs

9 Step Gages for Checking the Accuracy of Coordinate Measuring Machines In industrial metrology, actual physical bodies of known length which can be contacted by mechanical sensors have an important part to play as reference standards when measuring geometric parameters. They have become increasingly important for assessing the accuracy of 2- and 3-axis coordinate measuring machines (CMMs) that employ mechanical sensors. Checking the length measurement uncertainty has proved to be a highly informative and economical method for the acceptance testing and the ongoing monitoring of CMMs. The KOBA-step step-gage can be used for this in a variety of ways, given the advantages of unidirectional and bidirectional targeting and of measurements from all the gage faces along the line of measurement in succession while needing only a short time for preparation and measurement. Local errors can be detected in the CMM and characteristics can be derived for individual coordinate axes of the machine. With the aid of the length measurement uncertainty, the manufacturer or user can specify and check the accuracy of a coordinate measuring machine to establish its suitability for length measurement. This fundamental task in metrology is of particular importance since, in practice, the majority of measuring requirements are for the measurement of lengths. Length measurement uncertainty is defined by VDI/VDE guideline 2617 part 2.1 as the uncertainty with which a CMM allows the precisely known distance between two points on two parallel gage faces situated in succession along a line of measurement to be re-measured. The illustration below shows a measurement of this kind being made, taking as an example an individual parallel gage block with an outside length Le which is arranged obliquely in three dimensions and whose length is re-measured by successive contacts with the block of the probe head in positions I and II. Individual gage blocks arranged obliquely in three dimensions on the table of the CMM, showing an outside dimension Le measurement. Non-Contact Systems Contact Systems Step Gages Gage Blocks Technical Data

10 Technical Data Gage Blocks Step Gages Contact Systems Non-Contact Systems On the step-gage, spacing of different kinds for making test measurement are all available simultaneously as follows: Outside dimension Le, e.g. with the probe head in positions I and II (figure 2) Inside dimension Li, e.g. with the probe head in positions III and IV (figure 3) Rear face to rear face dimension Ls, e.g. with the probe head in positions III and V (figure 3) Front face to front face dimension, Lx, e.g. with the probe head in positions VI and IV (figure 3) Positional length Lp of a gage face from the datum gage face, e.g. with probe head in positions VI and 0 (figure 3) The illustrations show only one of many options available for each type and size of spacing. The value of the length measurement uncertainty is generally given in the form of a length dependant formula: U = A + K x L </= B. Figure 2 (above), Castellated step gage arranged obliquely in three dimensions on the table of a CMM, with an outside length Le being measured. Figure 3 (below), Step gage arranged obliquely in three dimensions on the table of a CMM, showing measurement of an inside dimension Li, of an outside dimensions Ls or of the position Lp of a gage face as a distance from the datum face. A distinction is made between the figure U1, specified for one dimensional test measurements along a coordinate axis (with terms A1, K1, B1), the figure U2 for two dimensional test measurements made diagonally in a coordinate place (with terms, A2, K2, B2) and the figure U3 for three dimensional test measurements made diagonally in the three dimensional space defined by the coordinates (with terms A3, K3, B3)

11 Length Measurement Uncertainty Plot For the purposes of graphic analysis, the differences L = La - Lr which are found and plotted, with the correct signs, for the individual measured lengths and runs in a length measurement uncertainty grid (right). The top and bottom boundary lines produce a funnel shaped outline with the neck of the funnel measuring 2A (A = the figure specified by the manufacturer for length measurement uncertainty, irrespective of length). 95% of all the test measurements must lie within, or on, the boundaries. A quantitative analysis is made simply by counting the number of measurements which lie outside the boundary lines. Gage Face Position Plot It is possible to test the positions Lp of the gage faces as distances from the datum face using the step-gage. If the relevant length errors Lp given by position measurement in line with VDI guideline 2617 part 3 are entered in a plot, then it is possible to see both the position of the test length and also the sequence, for example, if the measurement points in a run are connected by straight lines. With individual gage blocks this is not possible because they do not have any true common reference point and are not situated on a measurement line. A gage face position grid (right), similar to the length measurement uncertainty grid, is used for analysis. The outline is symmetrical and similar in shape to a butterfly with a width of 1A across the waist. The parameters in this case correspond to the appropriate figures A1, K1, B1 and so on. As this grid is moved along the measured length L, at least 95% of all the measurements must always lie within or on the boundary lines, meaning that all the measurement points must do so consistently whatever the position of the waist. This ensures that any pairing of two gage faces (even from different runs) in the form of outside, inside or face-to-face dimensions will also lie inside the funnel of the length measurement uncertainty grid. Thus, the grid forms a combined graphic expression of both the equations given above for all points of measurement. Comparisons Between the Test Standards Gage Blocks and Step Gages Apart from the step-gage, parallel gage blocks are the reference standards known for the greatest accuracy of length. However gage blocks are relatively flexible and have to be mounted at the AIRY points (symmetrical spacing a = x L) so that they are free of bending moments if the parallelism of the gage faces is to be maintained. The gage blocks for the individual test lengths can be individually placed one behind the other for shorter lengths and next to one another for longer lengths. When this is done, however, there is no way of obtaining the different gage points along a line of measurement which are desirable for measurement purposes. Non-Contact Systems Contact Systems Step Gages Gage Blocks Technical Data

12 Technical Data Gage Blocks Step Gages Contact Systems Non-Contact Systems Special Features and Advantages of the KOBA-step Gage The step gage has a castellated body containing a large number of forward and backward facing gage faces along a single line of measurement. This line of measurement is the same for measurements between any faces and the position of the work-piece, that is to say the orientation of the carrying body only has to be determined once to find this line. There are numerous possible combinations in various positions along the measurement line; the actual number of different interface dimensions for a step gage with 26 castellations (i.e., KOBA-step with a nominal size of 1020mm) is A special feature of the KOBA-step step gage is the fact that the actual gage points are situated on the neutral fiber of the carrying body; this means that there are no first-order changes in length if the state of bending changes. The configuration of the gage body and the fact that the line of measurement is situated on the neutral fiber prevents any increase in the distance between the gage faces at the points where the carrying body is supported and also prevents them from moving closer together at intervening points. In the KOBA-step step gage, which is neutral in bending, cylindrical gage blocks are fixed in position individually in an internal longitudinal groove formed in a steel 55 x 55mm steel carrying body. The axis of the gage blocks is situated on the fiber of the gage body which is neutral in bending and they form a series of castellations; this arrangement provides exceptional protection for the gage faces. The strength of the carrying body and the fact that the lengths do not vary if there are changes in bending to which it is subject, mean that the KOBA-step step gage can be mounted in a wide variety of fashions, e.g. cantilevered with zero position support or with support at the Bessel points. Accessories The range of accessories available for use with the step gage, such as swivel support and base, allows the gage body to be mounted on the CMM in such a way as to be free of torsion. A support of this kind produces a particularly stable connection between the step gage and the table of the coordinate measure machine (figures 7, 9 and 10) The combination of the step gage and its accessories produces a complete system for making an overall check on the CMM. One particularly important point is that the procedure of checking the coordinate measuring machine can be carried out fully automatically under computer control. Figure 7 (far left top) gage aligned horizontally along the X-Y diagonal plane, approx. 500mm above the table, stylus probe vertical. Figure 9 (far bottom left) gage aligned horizontally along the X-Y diagonal plane, turned 90, stylus probe horizontal, contact through crossdrills. Figures 7 and 9 are shown with base and swivel support accessories. Figure 10 (left) shows the KOBA-step aligned vertically along the Z-axis, standing in the accessory base

13 Traceability Since the acceptance or refusal of a coordinate measuring machine may depend on the outcome of the length measurement uncertainty test, it is advisable to always use officially calibrated testing equipment in order to avoid unpleasant surprises and incorrect interpretations. The KOBA-step step gage is available with either a DKD calibration certificate (German calibration service, DKD) or Works calibration. The length measurement uncertainties which can currently be achieved with the step gage are: DKD: U = 0.10µm x 10-6 x L (Length) >/= 0.12µm Works: U = 0.3µm x 10-6 x L (Length) Recalibration As is normal with all measurement standards, the KOBA-step step gage should be recalibrated after a certain period. We recommend the first calibration after one to two years and successive recalibration after two to three years. Alignment of the KOBA-step To define the position and orientation of the KOBA-step respective to the measuring line within the measuring volume, we recommend proceeding as follows: As the gage body with the fixed cylindrical gage blocks has been designed symmetrically to both sides, one of the external side surfaces and the upper external surface at the end of the large U-groove can be used for alignment. Any points which are as large as possible can be sensed at either the side surface or at the upper external surface. Both places so defined are squared off mathematically. A parallel line 27.5mm to the side surface and 30mm to the upper surface is the measurement line situated on the neutral fiber. It is also possible to use both ends of the 7 x 10mm interior groove for the alignment and proceed in a similar way as before. The distance from the wall of the groove and the floor of the groove to the line of measurement is 5mm in both directions. Figure 11, KOBA-step vertically oriented along the Z-axis, standing in the base. This alignment is also suitable for checking height gages as shown in Figure 12 (right) Non-Contact Systems Contact Systems Step Gages Gage Blocks Technical Data

14 Technical Data Gage Blocks Step Gages Contact Systems Non-Contact Systems Practical Use Practical experience using the KOBA-step step gage to check the accuracy of coordinate measuring machines and access and interpret the results has demonstrated the usefulness and potentially high information yield of the length measurement uncertainty method. The advantage lies in the fact that the measurement is carried out at precision gage faces using the normal gaging procedure and, in general, the manufacturer s standard processing software. It is a good idea to make full use of the opportunities offered by the step gage since (a) the unidirectional and bidirectional gaging of the inside and outside dimensions, (b) the dimensions between similarly oriented surfaces and successive dimensions from a given point occur even in the routine measurement of work pieces and (d) the measurements which have been obtained can all be correlated with one another as desired even after the event. What is more, a series of measurements at all the gage faces in succession provides a large amount of interrelated information and requires only a short time for measurement. Since the length measurement uncertainty characteristic depends very much on the geometry of the coordinate measuring machine, the lines along which measurements are made should be as follows: Figure 13, KOBA-step shown with swivel support and base, illustrated at various inclines. 3 to 4 measurement lines which are diagonal in 3 dimensions (i.e., along the diagonals of an inscribed cube at an angle of approximately 35 - or along the diagonals of the cuboid shape representing the measured space). 2 diagonal lines of measurement in each coordinate plane (i.e., along the diagonals of a square at a gradient of 45 - or the diagonals of a rectangle). At least one line of measurement parallel to each coordinate axis. At least 18 suitable lines of measurement have to be selected in order to arrive at a complete definition of the 18 geometrical cuboid characteristics of the entire measurement volume. It must be stressed that reliable measurement results for a complex system cannot be achieved unless stylus probes are included. Checking the CMM without mechanical contact, i.e., without using a probe, will not result in a comprehensive statement about the accuracy of the measuring machine. Figure 14, KOBA-step, shown with swivel support and base, size 1, for accommodating a 1020mm long step-gage

15 Conducting Formal Acceptance Procedures and Monitoring the Precision of Machine Tools and Robotic Dimensional Gaging Systems The KOBA-step gage can be used for checking the positioning accuracies of machine tools and articulated-arm robotic dimensional gaging systems, applications where it offers the same elegant approach and speed as when checking coordinate measuring machines. The swivel support and base accessories are required for this application. Regular use of the KOBA-step for monitoring dimensional gaging precision of machine tools is essential to total quality assurance. Complete quality assurance demands more than the mere precision dimensional gaging of finished work and components; regularly monitoring the dimensional gaging precisions of those machine tools employed in fabrication is indispensible. Finished products must be machined to within prescribed dimensional tolerances if they are to pass final acceptance checks. Regularly monitoring machine tool dimensional gaging precision provides valuable information on the degrees to which work and component dimensional tolerances are maintained during machining operations. Figure 15, KOBA-step installed on a swivel support and base, shown here spanning the major diagonal of the workspace of a vertical milling machine equipped with a dimensional gaging head. Figure 17, KOBA-step shown aligned vertically for checking the z-axis of a machine tool equipped with a dimensional gaging head Figure 16, KOBA-step shown horizontally aligned along the x-axis of the rotary bed of a machine tool equipped with a dimensional gaging head. Figure 18, KOBA-step shown installed on a flexible machining center to verify its positioning accuracy (the center s dimensional gaging head is integrated into its tool chuck.) Non-Contact Systems Contact Systems Step Gages Gage Blocks Technical Data

16 Technical Data Gage Blocks Step Gages Contact Systems Non-Contact Systems KOBA-step Mini A system for calibrating and monitoring multi-sensor measuring instruments and coordinate measuring instruments of small measuring volume. The KOBA-step mini is a step gage with a reduced cross section and gage block distance resized according to the measuring length and measuring task. The advantages of the regular sized step gage, such as cylindrical gage block embedded in the neutral fiber of the carrying body and access on three sides, have been maintained. The length and distance of the gage blocks were reduced to 10mm according to the total lengths which allows recognition of local errors of the measuring instrument. The cylindrical gage blocks are made of zirconia ceramic and are corrosion and wear resistant. The KOBA-step Mini system is completed by the swivel support, which is included, allowing the Mini to be mounted horizontally, vertically or in the volume. Traceability to the National Length Standard is guaranteed by DKD, PTB or Works calibration. Standard Lengths: Nominal Lengths, MM Number of Castellations / Probing Faces Division, MM Overall Length, MM / / Includes: KOBA-step Mini with zirconia ceramic probing elements, base and swivel support for positioning from 0 to 90 (horizontally or vertically) and an aluminum storage case. See page 44 for ordering information

17 Standard Nominal Lengths Nominal Length MM Number of Gage Faces Overall Length Weight kg The nominal length of a step gage is the distance from the first gage face to the last gage face. Special sizes on request up to 2500mm. The following characteristics are identical for all lengths listed above: Cross-section section of holder: 55x55mm Cross-section section of cylindrical gage blocks: 10mm diameter Accessories Swivel Support Base, Size 1 Base, Size 2 Storage Step Gages 420, 620 and 1020 Step gages 1540 and 2020 Optional Calibration DKD Works Length of castellations: 20mm Space between castellations: 20mm (10mm for 210 and 310mm step gages) Lockable in positions 50 to 50 in 5 increments For mounting swivel support to step gages 420, 620 and 1020 For mounting swivel support to step gage 1540 and 2020 Includes one storage box for gage, clamps and swivel support and one box for the base Includes one storage box for gage, clamps, one box for the swivel support and one box for the base U = 0.10µm x 10-6 x L >/= 0.12µm U = 0.3µm x 10-6 x L L is the distance between any measuring faces in meters. Evaluation Software KOB-SOFTITI-CKFV KOB-SOFTITI-CKLITE Full Version See page 6 in technical data for more information Lite Version, limited to one type of artifact only Non-Contact Systems Contact Systems Step Gages Gage Blocks Technical Data

18 Technical Data Gage Blocks Step Gages Contact Systems Non-Contact Systems Order Number Material Step Gage Ceramic Gage Blocks Corrosion resistant body Includes aluminum transport / storage case 210 and 310mm step gages include a swivel support and a base Nominal Length Number of Blocks Contact Points KOB-210STEPCERS Ceramic KOB-310STEPCERS Ceramic KOB-420STEPCER Ceramic KOB-620STEPCER Ceramic KOB-1020STEPCER Ceramic KOB-1540STEPCER Ceramic KOB-2020STEPCER Ceramic Note: Gage does not include certification, please order DKD or Works certification if required. See page 47 for options. SOLUTIONS How it works Order Number Note Certification is not included in the cost of gages. If needed, please add a certification option to your request for quote or your purchase order. See page 47 for options. Description Step Gage Base 1 and 2: Vertical Support Mounts swivel arm to the step gage Includes aluminum transport / storage case KOB-####Base-1 Base for step gages 420, 620 and 1020 KOB-####Base-2 Base for step gages 1540 and 2020 Replace ### above with the nominal length of the step gage. Note: 210 and 310 step gages include a base

19 Order Number KOB-####SWISUP SOLUTIONS How it works Description KOBA-step gage mounted on a swivel support and base for horizontal set-up (above) and on a base alone for vertical set-up (right). The swivel support allows the gage to be positioned in 20 positions in 5 increments from 50 to 50. Swivel Arm Support: Swivel arm and clamps Swivels and locks in position 50 to 50 in 5 increments Includes aluminum transport / storage case Requires Base for use (base is partially visible in photo at left) Locking, swivel support for Step-gages Replace #### above with the nominal length of the step gage. Note: 210 and 310 step gages include a swivel support. Non-Contact Systems Contact Systems Step Gages Gage Blocks Technical Data

20 Technical Data Gage Blocks Step Gages Contact Systems Non-Contact Systems KOB-210STEPCERS 210 Step Gage Set Ceramic gage blocks Corrosion resistant body Includes swivel support, base and storage case Contents Description Qty KOB-210STEPCER Step Gage, 210mm nominal length 1 Swivel Support for 210 step gage 1 Base for 210 step gage 1 Case Case for step gage, swivel support & base Note: Set does not include certification, please order DKD or Works certification if required. See page 47 for options. KOB-310STEPCERS 310 Step Gage Set Ceramic gage blocks Corrosion resistant body Includes swivel support, base and storage case Contents Description Qty KOB-310STEPCER Step Gage, 310mm nominal length 1 Swivel Support for 310 step gage 1 Base for 210 step gage 1 Case Case for step gage, swivel support & base Note: Set does not include certification, please order DKD or Works certification if required. See page 47 for options

21 KOB-420STEPSET 420 Step Gage Set Ceramic gage blocks Corrosion resistant body Includes swivel support, base and storage cases Contents Description Qty KOB-420STEPCER Step Gage, 420mm nominal length 1 KOB-420SWISUP Swivel Support for 420mm step gage 1 KOB-420BASE1 Base for 420mm step gage, size 1 1 Fixing clamp 2 Case Storage case for gage 1 Case Storage case for swivel and clamps 1 Case Storage case for base 1 Note: Set does not include certification, please order DKD or Works certification if required. See page 47 for options. KOB-620STEPSET 620 Step Gage Set Ceramic gage blocks Corrosion resistant body Includes swivel support, base and storage cases. Contents Description Qty KOB-620STEPCER Step Gage, 620mm nominal length 1 KOB-620SWISUP Swivel Support for 620mm step gage 1 KOB-620BASE1 Base for 620mm step gage, size 1 1 Fixing clamp 2 Case Storage case for gage 1 Case Storage case for swivel and clamps 1 Case Storage case for base 1 Non-Contact Systems Contact Systems Step Gages Gage Blocks Technical Data Note: Set does not include certification, please order DKD or Works certification if required. See page 47 for options

22 Technical Data Gage Blocks Step Gages Contact Systems Non-Contact Systems KOB-1020STEPSET 1020 Step Gage Set Ceramic gage blocks Corrosion resistant body Includes swivel support, base and storage cases Contents Description Qty KOB-1020STEPCER Step Gage, 1020mm nominal length 1 KOB-1020SWISUP Swivel Support for 1020mm step gage 1 KOB-1020BASE1 Base for 1020mm step gage, size 1 1 Fixing clamp 2 Case Storage case for gage 1 Case Storage case for swivel and clamps 1 Case Storage case for base 1 Note: Set does not include certification, please order DKD or Works certification if required. See page 47 for options. KOB-1540STEPSET 1540 Step Gage Set Ceramic gage blocks Corrosion resistant body Includes swivel support, base and storage cases Contents Description Qty KOB-1540STEPCER Step Gage, 1540mm nominal length 1 KOB-1540SWISUP Swivel Support for 1540mm step gage 1 KOB-1540BASE1 Base for 1540mm step gage, size 1 1 Fixing clamp 2 Case Storage case for gage 1 Case Storage case for swivel and clamps 1 Case Storage case for base 1 Note: Set does not include certification, please order DKD or Works certification if required. See page 47 for options

23 KOB-2020STEPSET 2020 Step Gage Set Ceramic gage blocks Corrosion resistant body Includes swivel support, base and storage cases Contents Description Qty KOB-2020STEPCER Step Gage, 2020mm nominal length 1 KOB-2020SWISUP Swivel Support for 2020mm step gage 1 KOB-2020BASE1 Base for 2020mm step gage, size 1 1 Fixing clamp 2 Case Storage case for gage 1 Case Storage case for swivel and clamps 1 Case Storage case for base 1 Note: Set does not include certification, please order DKD or Works certification if required. See page 47 for options. SOLUTIONS How it works Body DKD Works All KOBA-step step gages are available with the following certifications. Note certification is not included in the cost of gages. If needed, please include a certification option on your request for quote or purchase order. Certifications Description U = 0.10µm x 10-6 x L >/- 0.12µm U = 0.3µm x 10-6 x L Non-Contact Systems Contact Systems Step Gages Gage Blocks Technical Data

24 Technical Data Gage Blocks Step Gages Contact Systems Non-Contact Systems SOLUTIONS How it works To obtain optimum results, assemble swivel base properly and clamp step gage only on areas marked

25 Measurement and Standards Notes:

26 Measurement and Standards Order Form Bill To: Ship To: Customer Customer Address Address City, State, Zip City, State, Zip Phone / Fax Attention Shipping Method / Instructions Contact PO Number, or Card Number VISA Mastercard American Express Expiration Date, and CCV Name on Card Signature Part Number Description Qty Price/Ea. Total

27 Measurement and Standards About Us We are dedicated to presenting the finest quality products to industry while providing reliability and service. Our mission is to supply the technological advances that enable the manufacturing process to work faster, with higher precision, than past practices. We utilize methods that recognize global economic, ergonomic and ecological considerations. Over the years our highly skilled personnel, consistency in service, quality and innovative ideas have proven to be our greatest assets. Distributor Network PWM Group LLC products are sold through our highly valued distributor network, world-wide. We make all efforts to protect those relationships and are looking for additional qualified distribution networks in many areas of the world. If you are unable to locate a distributor in your area, or are interested in becoming a distributor, please contact us any method below. Contact Us PWM Group, LLC. Web MacArthur Blvd. info@pwmgroupllc.com Warren, MI United States Toll Free (North America only): Worldwide: Phone (800) Fax (800) The most current versions of our catalogs are always available for download from our website. We accept Visa, MasterCard and American Express. Open Account and C.O.D terms are also available, contact us for more information. The contents of this catalog are copyrighted PWM Group LLC. The oval pwm logo, Solutions How It Works and Be Creative are registered trade marks or trade names of PWM Group LLC. KOBA is a registered trade name of Kolb and Baumann GmbH. The KOBA-step, KOBA-check, KOBA-ball step, KOBA-sphere beam, Q3 Ball Cube and Koba-optima are registered trade names and are all protected by patents. We have tried to prevent inaccuracies in this catalog. We reserve the right to change or amend this publication without prior notice, and will inform you of any changes in specification or availability at the time of your inquiry. All products were available at the time of publication, if the exact part you wish is not available we will suggest an alternative

28 PWM Group LLC Professional Grade Intellectually Inspired Technology Enduring Performance Total Aggregate Value Your Local Distributor: CAT-STNDS2011, VOL. 1