MMT series. MMT series for precise and efficient threading. New Threading Tools

Transcription

1 New ing Tools Update B053G Expanded Insert MMT series MMT series for precise and efficient threading Series expanded, additional M-class inserts with 3-D chip breakers Tough new grade, VP15TF for G-class inserts

2 New ing Tools THREAD PITCH CROSS REFERENCE Application General machining Pipe fittings and couplings for gas and water Partial Profile Partial Profile 55 ISO Metric American UN Parallel Pipe Whitworth for BSW, BSP American NPT Type 1/P 1/P R=0.137P 1/4P 1/4P R=0.137P ' Symbol M UNC UNF W M UNC UNF G(PF)* W NPT Holder MMT Holder Pitch Full form mm (thread/inch) thread/inch mm thread/inch thread/inch thread/inch MMT Boring Bars Partial form Full form Partial form (416) (14) (4) ( 75) (416) (14) (4) ( 75)

3 Steam, gas and water pipes Pipe couplings for food and fire fighting industries Motion transmissions Aircraft and aerospace Oil and gas Taper Pipe BSPT American NPTF Round DIN 405 ISO Trapezoidal American ACME UNJ API Buttress Casing API Round Casing & Tubing R=0.137P R= P R= P /P R=0.137P 1 47' ' R= P P R=0.1042P ' ' R.Rc(PT) Rp(PS) NPTF Rd Tr (TM) ACME (TW) UNJ BCSG CSG LCSG thread/inch thread/inch thread/inch mm thread/inch thread/inch thread/inch thread/inch * 5 10 Note) When machining an internal UNJ thread, cut an internal hole with the appropriate diameter. Then machine with American UN. In this case, a full form type insert cannot be used. Note) For Pipe s, the list above contains both new and old symbols. Symbols in brackets are the old type. R: Male Taper, Rc: Female Taper, Rp: Female Parallel Female Parallel defined with Rp(PS) is used for Male Taper Pipe. It is different from Female Parallel Pipe defined with G(PF). 2

4 New ing Tools M-class inserts with 3-D chip breakers Features Excellent chip control Prevents burrs and vibration With moulded identification markings for easy thread recognition Cutting Performance Chip control comparison ISO metric external thread pitch 1.5mm Final pass (6th pass) Ideal chip control even in the latter half of passes when continuous chips are usually produced. Competitor MMT <Cutting conditions> Workpiece : JIS SCM440 Insert : MMT16ER150ISO-S Grade : VP15TF Cutting speed : 120m/min Cutting method : Radial infeed Depth of cut : Fixed cut area Pass : 6 times Coolant : WET Burr comparison ISO metric external thread pitch 1.5mm (Enlarged views of incomplete threads at the initial stages of cutting) MMT No burrs Competitor A Large burrs Competitor B Large burrs Use of Mitsubishi's unique M-class sharp edge technology. The sharp edge eliminates burrs on incomplete threads. <Cutting conditions> Workpiece : JIS SUS316 Insert : MMT16ER150ISO-S Grade : VP15TF Cutting speed : 100m/min Cutting method : Radial infeed Depth of cut : Fixed cut area Pass : 6 times Coolant : WET 3

5 Features G-class ground insert A Wide Variety of Products Mitsubishi Miracle ing (MMT) series.193 inserts and 26 holders The MMT series allows the threading of a wide range of threads, from standard metric to threads for pipe couplings, gas and aerospace. G M UNC RP RC UNF NPTF NPT R W Rd CSG LCSG Tr ACME BCSG A higher level of precision than conventional inserts. The following tolerances can be achieved with the MMT series. Type ing Tolerance Long Tool Life with "Sharp" Cutting Edge A "sharp" cutting edge lengthens tool life. A "sharp" cutting edge can be achieved with a small and uniform honing along the entire cutting edge. ISO Metric 6g / 6H American UN 2A / 2B Whitworth for BSW, BSP Medium Class A BSPT Standard BSPT Round DIN 405 7h / 7H ISO Trapezoidal 7e / 7H American ACME UNJ 3G 3A MMT series insert ("Sharp" cutting edge) Competitor's insert API Buttress Casing Standard API API Rounded Casing & Tubing Standard API RD American NPT Standard NPT American NPTF Class2 Insert G-class inserts Insert Selection Choosing M-class inserts with 3-D chip breakers or G-class inserts Chip control Precision of thread For ideal chip control and a high cost performance ratio, M-class inserts with 3-D chip breakers are recommended. G-class inserts are recommended where higher precision is required. M-class inserts with 3-D chip breakers 4

6 New ing Tools Features of VP10MF (G-class ground insert only) Superior wear and plastic deformation resistance High wear and plastic deformation resistance for threading when maintaining the thread form is important. Suitable for continuous high precision machining with extensive tool life. Effective in combination with G-class inserts for high precision threading. Features of VP15TF (G-class ground insert, M-class inserts with 3-D chip breakers) Wide versatility High fracture resistance during low rigidity applications such as bar feed machining. Able to withstand harsh conditions for long periods where conventional inserts would be liable to breakage. Effective combination of high cost performance M-class inserts with 3-D chip breakers. Features of coating coating coating features Micro-Structure of VP10MF coating (Al,Ti)N Cemented carbide MF10 Oxidation temperature ( C) ( C) Increased heat resistance Increased adhesion strength Competitor's coated grade (N) Adhesion strength (N) coating coating VP10MF and VP15TF displays high welding resistance, making it suitable for cutting mild steels, carbon steels, alloy steels, stainless steels and cast iron. Longer tool life achieved with a combination of a reliable coating and a carbide substrate best suited for threading. Grade markings on G-class inserts An identifying mark printed on the side of the insert Grade Insert underside VP10MF Grade name VP15TF Grade name Note) M-class inserts with 3-D chip breakers have no dots, only the grade name marking. Dot VP15TF, G-class inserts have three dots embossed on the underside. (On the side "VP15TF " is printed.) VP15TF, G-class inserts have the grade name "VP15TF " printed on the side. 5

7 Features of the new holders Suitable for threading with a large lead angle. By changing only the shim, MMT holders can be used for turning of threads with various lead angles as well as the turning of left hand threads. Insert interference with the thread can be prevented to achieve a good surface finish. Lead Angle () Inclination Angle () Insert Shim Lead Angle () Inclination Angle () Delivered with the holder. Internal threading holder with through coolant Efficient coolant supply to the cutting point lengthens the life of an insert. Smooth chip discharge, the key to efficient internal threading can be achieved. Clamp-on type allows easy indexing. Coolant flows directly to the cutting edge through a coolant nozzle in the centre of the shank. By changing the shim, MMT holders can be used for cutting threads with various lead angles. Reduced neck MMT holders prevents chips from jamming. Use of special surface treatment Higher corrosion and friction resistance and longer tool life than conventional products. Greatly increased rigidity Small diameter internal threading holder achieved approximately 1.4 times higher rigidity than a conventional product. Rigidity 1.4 times Competitor's MMT holder 6

8 New ing Tools ing Method Right Hand Left Hand *Change the shim *Change the shim Internal External Usually, threads are cut with the feed towards the chuck. When machining left hand threads, note that clamping rigidity is lowered due the application of back turning. When machining left hand threads, the lead angle is negative. Ensure an appropriate lead angle by changing the shim. Partial Form The same insert can be used for a range of pitches. Shorter tool life because the nose radius of the insert is smaller than that of the wiper insert. Finishing with another operation is necessary. Full Form No de-burring needed after threading. Requires different threading inserts. Semi Full Form (Trapezoidal threads only) No de-burring needed after threading. Requires different threading inserts. Finishing with another operation is necessary. Crest Radius (Additional turning necessary to finish the thread crest.) Crest Radius (Wiped/finished surface.) Crest Radius (Additional turning necessary to finish the thread crest.) Finished Surface Finished Surface Finished Surface Pre-finished Surface Feed Direction Pre-finished Surface Feed Direction Finishing allowance Pre-finished Surface Feed Direction Insert Insert Insert 7

9 Pipe threads and tool selection Parallel Pipe s G(PF) Type G1/16 G1/ G1/4 G3/ G1/2 G5/ G3/4 G7/ G1 G1 1/ G1 1/4 Note) Same as PF. Number of threads Standard internal diameter Taper Pipe s R, Rc(PT) Type R1/16 R1/ R1/4 R3/ R1/2 R3/4 R1 R1 1/4 Number of threads Standard internal diameter Note) Same as Rc and PT. The pitch is pre-determined for each nominal diameter. Note the minimum machining diameter especially when internal threading.

10 New ing Tools [External ing] MMTE HOLDER HOLDERS MMTE (External threading) F1 B F1 1.5 A 10 L2 L1 L1 Details of position A (Refer to pages 11-1 for size, ) H2 H1 Right hand tool holder only. Dimensions (mm) Order Number Insert Number Clamp Bridge Clamp Screw Stop Ring Shim Screw Shim * Wrench * Select and use a shim as shown below (sold separately), dependant on the lead angle. Stock SHIM Stock Inclination Angle () Standard shim delivered with the holder. Lead Angle () Order Number Applicable Holder Lead Angle () Order Number Stock Inclination Angle () Applicable Holder Inclination Angle () Shim Insert IDENTIFICATION MMT E R H 16 C Designation Application E External Hand of Tool Tool Size (mm) Tool Length (mm) Insert Size (mm) Method of Holding R Right (Height and Width) H C Clamp-on K M P R RECOMMENDED CUTTING CONDITIONS Workpiece Hardness Grade Cutting Speed (m/min) Workpiece Hardness Grade Cutting Speed (m/min) Mild Steel Heat-Resistant Alloy Carbon Steel / Alloy Steel Titanium Alloy Stainless Steel Heat-Treated Alloy Cast Iron Tensile Strength 9 : Inventory maintained. How to select a shim P22

11 New ing Tools [Internal ing] MMTI TYPE BORING BARS HOLDERS MMTI (Internal threading) 15 Fig.1 (Screw-on type) Fig.2 (Screw-on type) Order Number SHIM Lead Angle () Order Number MMT ø 15 ø Insert Number R Standard shim delivered with the holder. IDENTIFICATION F1 F1 A L3 L3 L1 L1 F1 L3 Min. Dimensions (mm) Cutting Diameter (mm) Order Number Stock R I R A K 11 S L1 H1 ød4 F1 F1 Clamp Bridge Clamp Screw Stop Ring Shim Screw Applicable Holder P15 L3 L2 L1 Right hand tool holder only. * Select and use a shim as shown below (sold separately), dependant on the lead angle. * The screw-on type has no shim. The holder has an in-built lead angle. Please select a holder with the appropriate lead angle. * The minimum cutting diameter indicates the prepared hole diameter, not the nominal thread diameter. Stock Stock Inclination Angle () Lead Angle Applicable Holder Fig.3 (Clamp-on type) Lead Angle () Fig.4 (Clamp-on type) Inclination Angle () Inclination Angle () Details of position A (Refer to pages 11-1 for size, ) Shim * Shim Insert Wrench Fig. Designation Application Min. Cutting Diameter (mm) Tool Length (mm) I Internal Shank Diameter (mm) K 125 R 200 M 150 Hand of Tool S 250 Shank Material Q T R Right Steel Shank with A Coolant Hole Insert Size (mm) Method of Holding S Screw-on C Clamp-on Lead Angle P P P RECOMMENDED CUTTING CONDITIONS Workpiece Hardness Grade Cutting Speed (m/min) Workpiece Hardness Grade Cutting Speed (m/min) Mild Steel Heat-Resistant Alloy Carbon Steel / Alloy Steel Titanium Alloy Stainless Steel Heat-Treated Alloy Tensile Strength Cast Iron How to select a shim P22 10

12 New ing Tools MMT STANDARD FOR M-CLASS INSERTS WITH 3-D CHIP BREAKERS EXTERNAL THREADING INSERTS ISO Metric Partial Profile Partial Profile Type BSPT Whitworth for BSW, BSP American UN Order Number Coated mm Pitch thread/inch Dimensions (mm) Total depth of cut (mm) Partial form Partial form Geometry IDENTIFICATION MMT 16 E R 050 ISO - S S M-class inserts with 3-D chip breakers Designation Diameter of Inscribed Circle (mm) Application E External I Internal Hand of Tool R Right mm 1.25mm 1.5mm 1.75mm 2.0mm Pitch mm A or 416 thread/inch G mm or 14 thread/inch ISO W BSPT UN ing Type Partial Profile Partial Profile ISO Metric Whitworth for BSW, BSP BSPT American UN mm mm 11 : Inventory maintained. (5 inserts in a case) : Sale on Cutting depth guide P23, P24

13 INTERNAL THREADING INSERTS Type Partial Profile Order Number Coated mm Pitch thread/inch Dimensions (mm) Total depth of cut (mm) Partial form Geometry Partial Profile Partial form ISO Metric BSPT Whitworth for BSW, BSP American UN Cutting depth guide P23, P24 12

14 New ing Tools MMT STANDARDS FOR G-CLASS GROUND INSERTS EXTERNAL THREADING INSERTS Type Partial Profile Tolerance Order Number Coated mm Pitch thread/inch Dimensions (mm) Total depth of cut (mm) Geometry Partial form Partial Profile Partial form ISO Metric IDENTIFICATION MMT 16 E R 050 ISO Designation Diameter of Inscribed Circle (mm) Application E External I Internal Hand of Tool Pitch ing Type R Right mm mm 60 Partial Profile mm A or 55 Partial Profile mm 416 thread/inch ISO ISO Metric mm W Whitworth for BSW, BSP mm mm G or BSPT BSPT mm 14 thread/inch UN American UN mm RD Round DIN mm mm TR ISO Trapezoidal AG or mm 4 thread/inch ACME American ACME mm UNJ UNJ mm mm APBU API Buttress Casing mm N or APRD API Round Casing &Tubing 75 thread/inch mm NPT NPT NPTF NPTF 13 : Inventory maintained. (5 inserts in a case) Cutting depth guide P23

15 14 P26 Order Number Dimensions (mm) Coated Pitch thread/inch mm Geometry Partial form Partial form INTERNAL THREADING INSERTS Cutting depth guide (mm) Type Total depth of cut Tolerance Partial Profile Partial Profile ISO Metric

16 15 P23, P24 MMT New ing Tools EXTERNAL THREADING INSERTS : Inventory maintained. (5 inserts in a case) Cutting depth guide STANDARDS FOR G-CLASS GROUND INSERTS Order Number Pitch thread/inch mm Dimensions (mm) Coated Geometry (mm) Type Total depth of cut Tolerance Round DIN 405 BSPT American UN Whitworth for BSW, BSP

17 16 P26, P27 Round DIN 405 BSPT American UN Whitworth for BSW, BSP Order Number Dimensions (mm) Coated Pitch thread/inch mm Geometry INTERNAL THREADING INSERTS Cutting depth guide (mm) Type Total depth of cut Tolerance

18 New ing Tools MMT STANDARDS FOR G-CLASS GROUND INSERTS XTERNAL THREADING INSERTS Type American NPTF American NPT API Round Casing & Tubing API Buttress Casing UNJ American ACME ISO Trapezoidal Tolerance Order Number Coated mm Pitch thread/inch Dimensions (mm) Total depth of cut (mm) Semi-full form Semi-full form Geometry : Inventory maintained. (5 inserts in a case) Cutting depth guide P24, P25

19 INTERNAL THREADING INSERTS American NPTF American NPT API Round Casing & Tubing API Buttress Casing UNJ American ACME ISO Trapezoidal Type Tolerance Order Number Coated mm Pitch thread/inch Dimensions (mm) Total depth of cut (mm) When machining an internal UNJ thread, cut an internal hole with appropriate diameter. And then machine with American UN. In this case, an full form type insert cannot be used. Semi-full form Semi-full form Geometry Cutting depth guide P27, P2 1

20 New ing Tools Recommended Cutting Methods and Conditions ing Methods Advantages Features Disadvantages Easiest to use. (Standard programme for threading) Wide application. (Cutting conditions easy to change.) Uniform wear of the right and left sides of the cutting edge. Difficult chip control. Subject to vibration in the later passes due to long cutting edge in contact with workpiece. Ineffective for large pitch threading. Heavy load on the nose radius. Radial Infeed Relatively easy to use. (Semi-standard program for threading.) Large flank wear of the right side of a cutting edge. Reduced cutting force. Suitable for large pitch threads or materials that peel easily. Relatively difficult to change cutting depth. (Re-programming necessary) Good chip discharge. Flank Infeed Preventing flank wear on the right side of the cutting edge. Reduced cutting force. Complex machining programming. Difficult to change cutting depth. (NC programming necessary) Good for large pitch or materials that peel easily. 1 5 Good chip discharge. Modified Flank Infeed Uniform wear of the right and left sides of the cutting edge. Reduced cutting force. Good for large pitch or materials that peel easily. Complex machining programming. Difficult to change cutting depth. (Re-programming necessary) Chips control is difficult. Incremental Infeed 19

21 ing Depth Advantages Features Disadvantages V1 V1V2 Easy to use. (Standard programme for threading.) Long chips generated during the final pass. X2 Superior resistance to vibration. (Constant cutting force.) Complex calculation of cutting depth when changing the number of passes. Fixed cut area X1 Fixed cutting depth X1X2 X2 Reduced load on nose radius during the first half of the passes. Easy chip control. (Optional setting of chip thickness) Easy to calculate cutting depth when changing the number of passes. Good chip control. * It is recommended to set the depth of cut of the final pass to 0.05mm ~ 0.025mm. Large cutting depths can cause vibration, leading to a poor surface finish. Subject to vibration in the later stages of cutting. (Increased cutting force) In some cases, changing the NC programme is necessary. Formulae Formulae to calculate infeed for each pass in a reduced series. apn = ap nap1 b Example) External threading (ISO metric) Pitch : 1.0mm ap : 0.6mm nap : 5 apn n ap nap b : Depth of cut : Actual pass : Total depth of cut : Number of passes : 1st pass 0.3 2nd pass 211 3rd pass 312 nth pass n1 1st pass 2nd pass 3rd pass 4th pass 5th pass 0.60 ap1 = = (ap1) ap2 = = (ap2ap1) ap3 = = (ap3ap2) ap4 = = (ap4ap3) 0.60 ap5 = = (ap5ap4) NC Programme for Modified Flank Infeed Example:- M passes modified 1-3 External ing Internal Treading 20

22 New ing Tools Recommended Cutting Methods and Conditions Selecting Cutting Conditions ing methods Cutting depth Radial Flank Fixed cutting depth Fixed cut area Priority Tool life Cutting force Surface finish Precision of thread Chips discharge ( : Modified) ( : Modified) * Tool life and surface finish accuracy can be increased by changing the threading method from flank infeed to modified flank infeed. * Chip control can be improved by increasing the cutting depth in the later half of passes. Efficiency (Reduced passes) Cutting depth and the number of passes Selection of the appropriate cutting depth and the right number of passes is vital for threading. For most threading, use a "threading cycle program," which has originally been installed on machines, and specify "total cutting depth" and "cutting depth in the first or final pass." Cutting depth and the number of passes are easy to change for the radial infeed method, thus making it easy to determine the appropriate cutting conditions. Feature and benefits of Mitsubishi products Insert grades, specially produced for threading tools, ensure highly efficient cutting by enabling high-speed machining and a reduced number of passes. Machining Cost Reduction Advice on improved threading Increasing tool life To prevent damage to the nose radius - Recommended method - Modified flank infeed. To have uniform flank wear on both sides of a cutting edge - Recommended method - Radial infeed To prevent crater wear - Recommended method - Flank infeed Preventing chip problems Change to flank or modified infeed. During radial infeed cutting, use an inverted holder and change the coolant supply to a downward direction. When using the radial infeed method, set the minimum cutting depth at around 0.2mm to make the chips thicker. Tangled chips during internal threading can damage the insert. In these cases, pause slightly away from the start point and clear the chips with coolant before every pass. Change to M-class inserts with a 3-D chip breaker. To achieve highly efficient machining Increase cutting speed. (Dependant on the maximum revolution and rigidity of the machine.) Reduce the number of passes. (Reduce by 30-40%.) A reduced number of passes can improve chip discharge because of the thicker chips generated. Preventing vibration Change to flank or modified infeed. When using radial infeed, reduce cutting depth in the later half of passes and lower the cutting speed. Increased surface finish accuracy A final wiping pass should be performed at the same depth of cut as the last regular pass. When using the flank infeed method, change to radial infeed only during the final pass. 21

23 Selecting a Shim for the MMT Series Flank angle and lead angle Lead angle () depends on a combination of thread diameter and pitch. Select a shim so that the lead angle of the thread can coincide with the flank angles of the thread and insert (1, 2). No need to change a shim for general threading with an MMT holder. When threading with a small diameter or large pitch, change the shim depending on the lead angle, referring to the table and graph below. When threading left hand threads, change to a shim with a negative inclination angle. Shim reference table (ing diameter) Pitch (mm) Pitch (mm) Lead Angle ing impossible Shim reference graph Right Hand ing impossible 2.5 ing impossible (Standard shim) Right Hand (mm) ing diameter (mm) (Note) Back turning in the case of left hand threads. : Lead angle ing Pitch (thread/inch) ing Pitch (mm) 10 Left Hand Lead angle () Flank angle (2) Left Hand (mm) : Lead angle 9 3 ing impossible ing diameter (mm) Note) When a thread lead angle the tool flank angle, change the shim to prevent side interference with the insert. (Refer to the table below for the calculation of thread lead angle and tool flank angle.) Flank angle (1) Inclination angle () Treading Pitch (thread/inch) When replacing a shim, check if the difference between the thread lead angle and shim inclination angle is within: where thread helix angle is ( ) 2-1 where thread helix angle is (29 ) * Inclination angle of a standard shim is 0. * The holder has a 1.5 lead angle. Example of selecting a shim When the thread lead angle is 2.2 In the case when the thread helix angle is (2.2 lead angle) ( ) = shim inclination angle is appropriate. ing with a standard shim (0 inclination angle) is possible. But, replacing with a shim with a 1 inclination angle is recommended, refer to Standard Shim List on pages 9 and 10. In the case when the thread helix angle is (2.2 lead angle) (2-1 ) = shim inclination angle is appropriate. Replacing with a shim with a 1 inclination angle is recommended, referring to Standard Shim List on pages 9 and 10. Calculation of thread lead angle I np tan d d : Lead angle I : Lead n : Number of threads P : Pitch d : Effective diameter of thread Relief angle of an insert set on a holder helix angle Internal relief angle External relief angle Relief angles (2, 1) of an insert become small when the thread helix angle of a trapezoidal, round, or other thread is small. Take care when selecting a shim. 22

24 New ing Tools Standard of Depth of Cut (External ing) EXTERNAL (RADIAL INFEED) ISO Metric Pitch (mm) Total Cutting Depth American UN Whitworth for BSW, BSP M-class inserts with 3-D chip breakers M-class inserts with 3-D chip breakers M-class inserts with 3-D chip breakers (Note) Set the finishing allowance on a diameter at approx. 0.1mm when using an insert with a wiper. Please note the cutting depth and the number of passes when a nose radius of an insert without a wiper or of an internal threading insert is small to prevent damage to the insert nose. Please set the cutting depth sufficiently deep enough on materials such as hardened steel or austenitic stainless steel to help prevent premature wear and chipping caused by the outer layer of the material. 23

25 BSPT Round DIN M-class inserts with 3-D chip breakers ISO Trapezoidal Pitch (mm) American ACME UNJ Total Cutting Depth API Buttress Casing (Note) Set the finishing allowance on a diameter at approx. 0.1mm when using an insert with a wiper. Please note the cutting depth and the number of passes when a nose radius of an insert without a wiper or of an internal threading insert is small to prevent damage to the insert nose. Please set the cutting depth sufficiently deep enough on materials such as hardened steel or austenitic stainless steel to help prevent premature wear and chipping caused by the outer layer of the material. 24

26 New ing Tools Standard of Depth of Cut (External ing) EXTERNAL (RADIAL INFEED) API Round Casing & Tubing American NPT American NPTF (Note) Set the finishing allowance on a diameter at approx. 0.1mm when using an insert with a wiper. Please note the cutting depth and the number of passes when a nose radius of an insert without a wiper or of an internal threading insert is small to prevent damage to the insert nose. Please set the cutting depth sufficiently deep enough on materials such as hardened steel or austenitic stainless steel to help prevent premature wear and chipping caused by the outer layer of the material. 25

27 Standard of Depth of Cut (Internal ing) INTERNAL (RADIAL INFEED) ISO Metric Pitch (mm) Total Cutting Depth M-class inserts with 3-D chip breakers American UN M-class inserts with 3-D chip breakers Whitworth for BSW, BSP M-class inserts with 3-D chip breakers (Note) Set the finishing allowance on a diameter at approx. 0.1mm when using an insert with a wiper. Please note the cutting depth and the number of passes when a nose radius of an insert without a wiper or of an internal threading insert is small to prevent damage to the insert nose. Please set the cutting depth sufficiently deep enough on materials such as hardened steel or austenitic stainless steel to help prevent premature wear and chipping caused by the outer layer of the material. 26

28 New ing Tools Standard of Depth of Cut (Internal ing) INTERNAL (RADIAL INFEED) BSPT Round DIN 405 ISO Trapezoidal Pitch (mm) Total Cutting Depth American ACME API Buttress Casing API Round Casing & Tubing M-class inserts with 3-D chip breakers (Note) Set the finishing allowance on a diameter at approx. 0.1mm when using an insert with a wiper. Please note the cutting depth and the number of passes when a nose radius of an insert without a wiper or of an internal threading insert is small to prevent damage to the insert nose. Please set the cutting depth sufficiently deep enough on materials such as hardened steel or austenitic stainless steel to help prevent premature wear and chipping caused by the outer layer of the material. 27

29 American NPT American NPTF (Note) Set the finishing allowance on a diameter at approx. 0.1mm when using an insert with a wiper. Please note the cutting depth and the number of passes when a nose radius of an insert without a wiper or of an internal threading insert is small to prevent damage to the insert nose. Please set the cutting depth sufficiently deep enough on materials such as hardened steel or austenitic stainless steel to help prevent premature wear and chipping caused by the outer layer of the material. 2

30 New ing Tools Standard and Corresponding Insert Name Standard Type Symbol Name Standard Type Symbol H/2 h/2 r Female ISO Metric H H/2 H1 H/ H/2 H/4 h Male H= P d2=d p H1= P d1=d p D=d D2=d2 =d1 P Female d1 or d2 or D2 d or D Round DIN 405 BSPT H H/2 h/ P 90 H= P h= r= p P=25.4/thread d d2 h3/2 h3 d3 Axis R1 Male R1 R3 P ac R2 r Female ac 16 H4 1 D2 D4 ac=0.05 P h3=h4=0.5 P R1= P R2= P R3= P American UN H H/2 H1 H/ H/2 H/4 Male P Female H= /n d2=(d /n) 25.4 H1= /n d1=(d /n) 25.4 d=(d) 25.4 D=d D2=d2 =d1 P=25.4/thread d1 or d2 or D2 d or D ISO Trapezoidal H H/2 H/2 H1 H1/2 H1/ Male 0.366P 0.366P Female d1 or d2 or D2 d or D P Whitworth for BSW, BSP H H/2 H/2 H/6 H H H/6 r Male H=0.9605P d2=d-h1 d1=d-2h1 r=0.1373p H1=0.6403P '=d h D=d D2=d2 =d1 P=25.4/thread P Female r ' 14 30' Frm Fcs P fr d1 or ' d2 or D2 d or D American ACME P/4 h P/4 Female Fcn Frs Male Female Parallel Pipe H H/2 H/2 H/6 h H/6 r Male H= P d2=d-h d1=d-2h r= p h= D=d D2=d2 =d1 25.4/thread P Female r d1 or d2 or D2 d or D American NPT Fc Fr Fc fc H h fc fc Fr H= P h= p P Male 1 47' 29 Wiper : Insert order number is determined by selected pitch. General : An insert is applicable to several pitch types.

31 Troubleshooting Problems Observation Causes Solutions Low thread precision. s do not mesh with each other. Incorrect tool installation. Set the insert centre height at 0mm. Check holder inclination (Lateral). Shallow thread. Incorrect depth of cut. Modify the depth of cut. Lack of insert wear or plastic deformation resistance. Refer to "Quickly generated flank wear." and "Large plastic deformation." below. Poor surface finish. Surface damage. Chips wrap around or clog the work pieces. Change to flank infeed and control the chip discharge direction. Change to an M-class insert with a 3-D chip breaker. The side of the insert cutting edge interferes with the workpiece. Check the lead angle and select an appropriate shim. Surface tears. Built-up edge (Welding). Increase cutting speed. Increase coolant pressure and volume. Cutting resistance too high. Decrease depth of cut per pass. Surface vibrations. Cutting speed too high. Decrease the cutting speed. Insufficient work piece or tool clamping. Re-check work piece and tool clamping. (Chuck pressure, clamping allowance) Incorrect tool installation. Set the insert centre height at 0mm. Short tool life. Flank wear quickly generated. Cutting speed too high. Too many passes causes abrasive wear. Decrease the cutting speed. Reduce the number of passes. Small depth of cut for the finishing pass. Do not re-cut at 0mm depth of cut, larger than 0.05mm depth of cut is recommended. Non-uniform wear of the right and left sides of the cutting edge. The work piece lead angle and the tool lead angle do not match. Check the work piece lead angle and select an appropriate shim. Chipping and fracture. Cutting speed too low. Increase cutting speed. Cutting resistance too high. Increase the number of passes and decrease the cutting resistance per pass. Unstable clamping. Check work piece deflection. Shorten tool overhang. Recheck work piece and tool clamping. (Chuck pressure, clamping allowance) Chip packing. Increase coolant pressure to blow away chips. Change the tool pass to control chips. (Lengthen each pass to allow the coolant to clear the chips. Change from standard internal cutting to back turning to prevent chip jamming. Non-chamfered work pieces causes high resistance at the start of each pass. Chamfer the workpiece entry and exit faces. Large plastic deformation. High cutting speed and large heat generation. Lack of coolant supply. Decrease the cutting speed. Check coolant is supply is sufficient. Increase coolant pressure and volume. Cutting resistance too high. Increase the number of passes and decrease the cutting resistance per pass. 30

32 Registration No. 00GRC-EA010 Gifu Plant New ing Tools Application Example Insert (Grade) JIS SCM35 Plug ISO Metric M11.0 JIS SUS316 Bolt Taper Pipe R7/ Workpiece Cutting Speed (m/min) Cutting Conditions Pass Cutting method Depth of cut 5 times Radial Infeed Fixed cut area 20 times Radial Infeed Fixed cut area Coolant Wet Wet piece/corner 1,000 2,000 3,000 piece/corner Result MMT Competitor's MMT Competitor's MMT inserts had smaller wear than conventional products. Tool life increased 3 fold. MMT inserts suitable for unstable machining without sudden fracturing. Tool life extended by 1.5 times. Insert (Grade) JIS S45C Bolt ISO Metric M201.5 JIS SCM435 Bolt ISO Metric M121.5 Workpiece Cutting Speed (m/min) Cutting Conditions Pass Cutting method Depth of cut 6 times Radial Infeed Fixed cut area 10 times Radial Infeed Fixed cut area Coolant Wet Wet piece/corner piece/corner MMT MMT Result Competitor's Competitor's MMT inserts had better chip control and gave smaller burrs on incomplete threads compared to conventional products. 3 times longer tool life was possible. Better chip control from the MMT inserts prevented chips wrapping around the workpiece. Tool life lengthened x 1.5 For Your Safety ado not touch cutting edges and chips without gloves. amachine within the recommended conditions, and replace worn tools with new ones before breakage. ause protectors such as safety covers and protective glasses. High-temperature chips can scatter and long chips can be discharged. aalways take precautions against fire when using water-insoluble coolant. aclamp the inserts and parts firmly with the wrench or spanner provided. Tsukuba Plant ISO Registration No. JSAQ 00 Gifu Plant ISO Registration No. JSAQ 094 Tsukuba Plant ISO Registration No. JSAE 036 MITSUBISHI MATERIALS CORPORATION Marketing Dept KFC bldg., 7F, 1-6-1, Yokoami, Sumida-ku, Tokyo , Japan TEL FAX MITSUBISHI MATERIALS U.S.A. CORPORATION Headquarters 17401, Eastman Street, Irvine, California, 92614, USA TEL FAX MMC HARTMETALL GmbH Comeniusstr.2, 40670, Meerbusch GERMANY TEL FAX MMC METAL SINGAPORE PTE LTD. 10, Arumugam Road, #04-00 Lion Industrial Bldg.,409957, SINGAPORE TEL FAX Mitsubishi Carbide Home page : (Tools specifications subject to change without notice.) E( - )