Sandvik-coromant Threading Manual do Utilizador

23 910143546485658606264656769707276869296112114118ContentsIntroduction 1 Basics in threads2 Applications Threading methods Thread turning vs thread m

102. ApplicationsThread turning Thread millingThread turning• Normally the most productive threading method• Covers the largest number of thread pro

10028262019181614121110987654.541 0.16 0.17 0.19 0.20 0.17 0.17 0.20 0.23 0.22 0.22 0.22 0.23 0.26 0.25 0.31 0.30 0.34.006 .007 .007 .008 .007 .007 .0

10110 8 6 41 0.21 0.21 0.24 0.30.008 .008 .009 .0122 0.20 0.20 0.23 0.29.008 .008 .009 .0113 0.19 0.19 0.22 0.28.007 .008 .009 .0114 0.18 0.19 0.21 0.

10216141210865431 0.22 0.20 0.20 0.20 0.20 0.24 0.26 0.28 0.31.009 .008 .008 .008 .008 .009 .010 .011 .0122 0.20 0.19 0.19 0.20 0.20 0.23 0.25 0.28 0.

10316141210865431 0.22 0.21 0.21 0.21 0.21 0.24 0.26 0.29 0.31.009 .008 .008 .008 .008 .009 .010 .011 .0122 0.21 0.20 0.20 0.20 0.20 0.23 0.26 0.28 0.

10416 14 12 10 8 6 5 4 31 0.18 0.20 0.18 0.21 0.22 0.24 0.25 0.24 0.25.007 .008 .007 .008 .008 .009 .010 .010 .0102 0.16 0.18 0.17 0.20 0.21 0.23 0.24

1051.523456781 0.22 0.22 0.20 0.24 0.27 0.29 0.34 0.32.009 .009 .008 .009 .011 .012 .013 .0132 0.21 0.21 0.19 0.23 0.27 0.29 0.33 0.31.008 .008 .007 .

1061.5 21 0.20 0.19.008 .0082 0.18 0.18.007 .0073 0.17 0.17.007 .0074 0.15 0.16.006 .0065 0.13 0.15.005 .0066 0.08 0.14.003 .0067 0.12.0058 0.08.0030.

107123456789101112131415API 60° V-0.038R266RG-22V381A0402E 0.36 0.35 0.33 0.32 0.30 0.29 0.27 0.25 0.23 0.20 0.16 0.08 3.08.014 .014 .013 .013 .012 .0

1081.00 1.50 2.00 2.50 3.00 18 16 14 12 19 14 11 11 ½1 0.34 0.36 0.47 0.46 0.55 0.49 0.39 0.44 0.52 0.49 0.47 0.45 0.50.013 .014 .019 .018 .022 .019 .

1090.20 0.12 4.005 40.25 0.15 4.006 40.30 0.18 4.007 40.35 0.21 4.008 40.40 0.25 4.010 40.45 0.28 4.011 40.50 0.29 4.011 40.75 0.45 4.018 41.00 0.60 5

11 2. ApplicationsInsert typesThree main types of threading principle can be used to produce a thread. The different technical and economic arg

1100.50 0.34 7.013 70.70 0.43 8.017 80.75 0.48 8.019 80.80 0.53 8.021 81.00 0.63 11.025 111.25 0.77 11.030 111.50 0.92 13.036 131.75 1.05 14.041 142.0

1110.50 0.34 4.013 41.00 0.63 5.025 51.50 0.92 6.036 61.75 1.05 8.041 82.00 1.20 8.047 82.50 1.48 10.058 1019 0.92 6.036 614 1.23 8.048 811 1.54 9.061

1125H/81 0.54 0.13 327Rxx-xx100VM-THx 1.20 0.13 0.54 0.25 327Rxx-xx100VM-TH327R12-22200MM-TH1.21.080.130.250.650.541.5 0.81 0.19 327Rxx-xx100VM-THx327

1135H/81.5 0.81 0.19 328R13-150VM-TH 2.11 0.19 0.81 0.38 328R13-150VM-TH 2.11 0.19 0.971.75 0.95 0.22 328R13-150VM-TH 2.11 0.19 0.97 0.44 328R13-150VM

114apx =apnap - 1√√5. Technical referenceFormulasUse the following formulas as a reference for successful thread machining.Thread turning formulasI

115apx 1 =0.945√√0.3 = 0.23apx 1 =.0375√√0.3 = .009apx 3 =0.945√√ 2 = 0.59apx 3 =.0375√√ 2 = .023apx 4 =0.945√√ 3 = 0.73apx 4 =.0375√

116 = arctan sin tan()2 = arctannumber of startsPd2 = arctanPd260° 8.5° 6°55° 7.5° 5°30° 4° 2.5°29° 4° 2.5°10° /

117Dvf = Dm-DcDvf1 = Dvf2efffz =sin vfm = n × fz × zchex= arccos 1 -Dcapvf =vfm × (Dm + Dcap)DmDw – Dm 4 (Dm + Dcap) ae eff =2 × ae effvfm=

11832 0.794 0.50 50.8028 0.907 0.75 33.8727 0.941 1.00 25.4024 1.058 1.25 20.3220 1.270 1.50 16.9319 1.337 1.75 14.5118 1.411 2.00 12.7016 1.587 2.50

122. ApplicationsFull pro le inserts –  rst choice for high quality thread formsThe most common insert type, used to form a complete thread pro le,

132. ApplicationsMulti-point inserts – productive, economic threading in mass productionMulti-point inserts are similar to full pro le-, but have mor

142. Applications – Thread turningThread turningThread turning is the most common method of producing threads. The many tooling systems offered by Sa

152. Applications – Thread turningGeometry AFirst choice• First choice for most op-erations and materials • Rounded cutting edge for safe and consiste

16AFCPP1.1.Z.ANP2.1.Z.ANP2.5.Z.HTP3.1.Z.HT01.102.102.203.21MM5.0.Z.ANM1.0.Z.AQM3.1.Z.AQ05.1105.2105.51KK1.1.C.NSK2.2.C.UTK3.1.C.UT07.208.209.1NN1.2.Z.

172. Applications – Thread turningModi ed  ank infeed Radial infeed Incremental infeedModi ed  ank infeedHas many advantages over radial infeed, a

182. Applications – Thread turningRadial infeedThe most commonly-used infeed method and the only one possible on many non-CNC lathes.• Produces a sti

192. Applications – Thread turningSuccessful chip control in thread turningThreading can present problems in machines where there is limited supervisi

2IntroductionIntroductionModern threading tools can produce complex component features with relative ease, but to gain consistent results there are a

202. Applications – Thread turningInfeed depths per passDecreasing depth per pass (constant chip area)• First choice, most common• First pass is deep

212. Applications – Thread turningInfeed value recommendations Number of infeeds and total depth of thread.Number of passes and size of infeed per pas

222. Applications – Thread turningQuick change coupling - for large, internal threadsBoring bar - for internal threadingCoromant Capto® coupling - fo

232. Applications – Thread turningExternal thread turningThis is the most common thread turning method. It is often easier and less demanding on the t

242-3 x dmm5 x dmm5-7 x dmm2. Applications – Thread turningBoring bar type Max. overhangSteelSteel dampenedCarbideInternal thread turningInternal thr

252. Applications – Thread turningExternal InternalRight hand threadsRight hand threadsRight hand tool/insertRight hand tool/insertRight hand tool/ins

262. Applications – Thread turningInsert clearance anglesTwo types of angular clearance between the insert and thread are necessary for precise, accu

272. Applications – Thread turningSelecting shims to tilt the insert for  ank clearanceInsert shims are used to give different tilts to the insert, s

28 Pd2 x π=P d2===A.B.tan 6 mm40 mm x π6 mm40 mm x π = arctan = arctan2. Applications – Thread turningMethods for selecting the co

29( ()()60° 7.6° 5°55° 7.1° 4.7°30° 4° 2.6°29° 3.8° 2.5°10° / 3° 2.7° / 0.8° 1.8° / 0.5°2. Applications – Thread turningRelationship between  ank

3 1. Basic in threads1. Basics in threadsWhat is a thread?Threads are classi ed according to the main functions they perform in a compo

302. Applications – Thread turningRadial clearanceTo give adequate radial clearance, inserts are tilted in the tool holder 10° or 15°.It is important

312. Applications – Thread turningMulti-start threadsThreads with two or more parallel thread grooves require two or more starts. The lead of this typ

322. Applications – Thread turningInsert nose radius and tool lifeThe nose radius is the smallest point on the insert and the most li-able to break u

33STTCR/LSDNCR/L, TR-D13NCN2. Applications – Thread turningInsert tool lifeCareful observation of the insert after threading will allow you to achieve

34z z2. Applications – Thread turningThread deburringBurrs which appear at the start of the thread can cause problems and should be removed. This is

352. Applications – Thread millingThread milling produces threads with the circular ramping move-ment of a rotating tool. Here, the lateral movement o

362. Applications – Thread millingBene ts of thread milling vs. tappingWhen deciding on the choice of threading method, the bene ts of thread millin

372. Applications – Thread millingCoolant• A thread mill does not require coolantCutting force• A thread mill can make large threads in smaller machin

382. Applications – Thread millingThread milling – main considerationsTo achieve the best results in a thread milling operation, always consider the f

392. Applications – Thread millingChoice of cutting diameter The cutter engagement will create a minute form error on the root of the thread pro le.

41. Basic in threadsThreading terms and de nitions 1. Root/bottomThe bottom surface joining the two adjacent  anks of the thread2. Flank/sideThe sid

40ZYX2. Applications – Thread millingTool pathThread milling requires machine tools which are capable of simultane-ous movements on the X, Y and Z axe

412. Applications – Thread millingDown milling and up millingDown milling is when the tool is fed in the direction of tool rotation and is the preferr

422. Applications – Thread millingMachining with several infeed passesSeparating the thread milling operation into several infeed passes achieves larg

432. Applications – Thread millingCutting data considerations• In internal applications, ae is increased relative to straight cutting, which reduces t

442. Applications – Thread millingExternal threading with milling tools.All thread milling inserts are designed for internal threads, however CoroMill

46T-Max Twin-Lock®CoroThread® 266CoroCut® XSCoroThread® 266T-Max Twin-Lock®CoroCut® XS0.2322.010 5 38.03. Products - thread turning3. ProductsThread t

47T-Max Twin-Lock®CoroThread® 266CoroCut® MBCoroTurn® XSCoroThread® 266T-Max Twin-Lock®CoroCut® MBCoroTurn® XS4.15710.39312.472602.3623. Products - th

48liCiC l6.350 1/4 11* .039*9.525 3/8 16 .63012.70 1/2 22 .86615.875 5/8 27 1.063 AFC3. Products - thread turningCoroThread® 266 – external and intern

493. Products - thread turningThe unique guide-rail interface between the insert and tip seat eliminates insert movement caused by cutting force varia

5M10 x 1.25 5g6g M16 - 6h1. Basic in threadsThread designations International standardsTo ensure that the two (internal and external) halves of a thre

50TR – AC – SA V – RD – BUVW – VM MM – UN WH – NTPT – NF RN MJ – NJ3. Products - thread turningV-pro le 55° (VW)Pitch: 28 – 4 t.p.

513. Products - thread turningCoroThread® 266 – grade recommendationsTwo unique grades offer the chance to boost threading performance with CoroThread

523. Products - thread turningCoroThread® 266 – tool holder assortmentThe wide CoroThread 266 programme is available in the following tool holder vers

536h – 6e6H – 6G2A2BA—3. Products - thread turningTolerance classes with CoroThread® 266CoroThread 266 turns threads in the following tolerance classe

543. Products - thread turningDampened 4C Silent Tools bars – vibration-free internal threadingFor internal threading operations - where radial forces

553. Products - thread turningQS holding system for sliding head machines – external threadingThe QS holding system  ts in the sliding head machine

56-C -C-N -N-A -A3. Products - thread turningCoroCut®XS – external threadingFor precision threading in small part machining, up to 32 mm (1.26 inch)

57VM  GC1025GC1105H13A 3. Products - thread turningV-pro le 60° (VM)Pitch: 0.2 – 2 mm12 – 80 t.p.i.Type of insertF-sharpGeometryF-sharpGradeISO

583. Products - thread turningCoroTurn® XS – internal precision threadingCoroTurn XS has an insert in the form of a rod, mounted in an easily-indexabl

59VM MM – UN GC1025 (VM, MM-UN)CB7015 (VM)WH – NT AC – SAGC1025 3. Products - thread turningV-pro le 60° (VM)Pitch: 0.5 – 1.5 mm48 – 16 t.p.i.

61. Basic in threadsTolerance positionsThe tolerance position identi es the fundamental deviation and is indicated with an upper-case letter for inte

603. Products - thread turningCoroCut® MB – internal threadingCoroCut MB has front-mounted exchangeable inserts for internal machining in hole diamete

61VM MM – UN GC1025 (VM, MM-UN)CB7015 (MM)WH – NT AC – SAGC10253. Products - thread turningV-pro le 60° (VM)Pitch: 0.5 – 2.5 mm32 – 10 t.p.i.Met

62RD V – RD – BU2PMKNSGC11253. Products - thread turningT-Max Twin-Lock® – internal and external threadingDesigned for threading in high volume area

633. Products - thread turningCoroTurn® SL cutting heads – internal and external threadingChoice of barThe CoroTurn SL assortment includes:• Coromant

64123. Products - thread turningTaper anglesPro le optionsExtended offerDue to the wide range of thread styles with different shapes and pitches, San

65CoroMill® Plura CoroMill® 327 CoroMill® 328 3.2 – 19(.189 – .783)11.7 – 21.7(.461 – .854)39 – 80(1.535 – 2.480)3. Products - thread millingThread Mi

663. Products - thread millingCoroMill® 327 and CoroMill® 328 – Single-point threadingCoroMill tools offer many advantages for thread milling. For sin

673. Products - thread millingCoroMill® 327Designed for holes over 12 mm (.472 inch), Coro-Mill 327 offers inserts for metric, UN and Whitworth thread

68MM VM WH21.7(.854)11.7 – 21.7(.461 – .854)11.7(.461)GC10251.*2.3.6 1.89 4.312 6.514 6.51. 2. 3.3. Products - thread millinghex 0.05 mm (0.02 – 0.07

69VM 39 – 100(1.535 – 2.480) 2 – 8 GC10253. Products - thread millinghex 0.10 mm (0.05 - 0.15).004 inch (.002 - .006)Max rec. fz0.15 mm.006 inchCor

71A 1B2A 2B3A 3B¼” 20UNC – 2A1. Basic in threadsThe pitch value is indicated in t.p.i. (threads per inch).To convert to metric, this should be divide

703. Products - thread millingCoroMill® Plura – Multi-point threadingCoroMill Plura solid carbide thread mills produce different threads of the same p

71MM UNC/UNCF NPT/NPTF3.2 – 19(.189 – .551) (.311 – .783)3 – 5 3 – 5 3 – 5GC1620GC16303. Products - thread millingCoroMill Plura – grade selectionG

72GC1125GC1135GC1020GC4125GC1025H13AGC1105GC1620GC1630CB7015CoroThread® 266T-Max Twin-Lock® CoroCut® XSCoroCut® MBCoroTurn® XSCoroMill® 3

733. ProductsGC1125 Coating: PVD TiCrAlNTools: CoroThread 266. T-Max Twin-LockPVD grade for ISO P, -M, -K, -N materials. Combines the superior wear

743. ProductsGC1025 Coating: PVD TiAlN coating (thin)Tools: CoroCut XS, CoroCut MB, CoroTurn XS, CoroMill 327 and Coro-Mill 328.All-round grade for al

753. ProductsGC1620 Coating: PVD TiAlN (thin) Tools: CoroMill PluraCoroMill Plura grade for semi- nishing to  nishing operations demanding wear

76AB4. Troubleshooting4. TroubleshootingCareful observation of the insert/cutting edge after machining can help to optimize results regarding tool lif

77AB4. Troubleshooting – Thread turningInsert breakage• Wrong turned diameter prior to threading• Infeed series too tough• Wrong grade• Poor chip c

784. Troubleshooting – Thread turningAbnormal  ank wearVibrationPoor surface on one  ank of thread.• Incorrect method for  ank infeed• Insert inc

794. Troubleshooting – Thread turningProblem Cause SolutionPoor surface  nishPoor chip controlShallow pro le• Cutting speed too low• The insert is

8ABBSWBSFBSP.FISO 228/1 G1 ½ISO 7/1 = Rp 1 ½Rp 7/1 = Rc 1 ½Rc 7/1 = R 1 ½R1. Basic in threadsWhitworth pipe threads:Tolerance positionFine Only one cl

804. Troubleshooting – Thread turningExcessive edge pressure• Work hardening material in combina-tion with infeed depths which are too shallow• Exce

814. Troubleshooting – Thread millingChipping• The part of the cutting edge which is not in cut is damaged by chip ham-mering, leading to poor surfac

824. Troubleshooting – Thread millingThermal cracks• Temperature variations from varying cutting  uid supply or intermittent machining leading to sm

834. Troubleshooting – Thread millingProblem Cause SolutionRapid wear causing poor surface  nish or out of tolerance.• Cutting speed too high• Insu

844. Troubleshooting – Thread millingVibrationRe-cutting of chips• Weak  xturing• Tool overhang too long• Insuf cient chip evacuation• Check clamp

854. Troubleshooting – Thread millingMachine inef ciency• Machine RPM’s too low• Reduce cutting speed before table speed• Use a smaller cutter and

86GC1125 GC1135 H13APP1.1.Z.AN 01.1 125 230 205 160P2.1.Z.AN 02.1 180 155 140 115P3.0.Z.AN 03.21 325 115 100 70MP5.0.Z.AN 05.11 200 160 145 90M1

87GC1125 GC1135 H13APP1.1.Z.AN 01.1 125 760 670 510P2.1.Z.AN 02.1 180 510 460 380P3.0.Z.AN 03.21 325 375 320 230MP5.0.Z.AN 05.11 200 520 475 295

88PP1.1.Z.AN 01.1 1500 125 0.25 365–360–345P2.1.Z.AN 02.1 1700 175 0.25 300–295–285P3.0.Z.AN 03.21 2900 300 0.25 140–140–135MP5.0.Z.AN 05.11 1800 200

89PP1.1.Z.AN 01.1 216,500 125 0.25 1200-1200-1150P2.1.Z.AN 02.1 246,500 175 0.25 990-970-930P3.0.Z.AN 03.21 420,000 300 0.25 465-455-435MP5.0.Z.AN 05.

92. Applications2. ApplicationsThreading methodsVarious methods and applications exist for generating screw threads. The choice of application will be

90DcznPM4 3.2 3 – 152 0.030 141 0.01801.1 125 M10 8.2 4 • 132 0.052 124 0.029M20 16 5 • 141 0.130 131 0.069M4 3.2 3 – 147 0.012 137 0.00602.2 300

91DcznPM4 .126 3 – 500 .0012 465 .000701.1 125 M10 .323 4 • 435 .0020 410 .0012M20 .630 5 • 465 .0051 430 .0028M4 .126 3 – 485 .0005 440 .000302.2

925. Technical referenceProgrammingModern machine tools use computer numerical control (CNC) meth-ods to produce complex parts in a consistent and aut

935. Technical referenceProgramming – machining centreIn thread milling; rolling in and out of cut achieves good tool life and high thread qualityWhen

9466H 5. Technical referenceCoroMill® PluraCoroMill Plura has an individual radius programming value (RPRG) marked on the shank of the tool.The RPRG v

955. Technical referenceRepeat this program for CoroMill 327/CoroMill 328. until the right thread depth is achieved.G00 Z-21.000Move to required depth

96CMC 02.1MC P2.1.Z.AN0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 6.001 0.10 0.16 0.16 0.17 0.20 0.17 0.20 0.20 0.20 0.24 0.

97CMC 02.1MC P2.1.Z.AN0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 6.001 0.10 0.15 0.15 0.16 0.20 0.16 0.19 0.19 0.19 0.22 0.

983228242018161413121110987654.541 0.17 0.15 0.18 0.18 0.20 0.19 0.18 0.20 0.22 0.21 0.21 0.21 0.22 0.25 0.24 0.29 0.28 0.32.007 .006 .007 .007 .008 .

993228242018161413121110987654.541 0.16 0.14 0.16 0.16 0.18 0.17 0.16 0.18 0.20 0.19 0.19 0.19 0.19 0.23 0.21 0.27 0.28 0.30.006 .005 .006 .006 .007 .