Introduction. About Yamawa. About this Quick Guide

Transcription

1 Quick Guide

2 Introduction About Yamawa Founded in Japan in 1923, Yamawa has made the excellence in taps, dies and centering tools manufacturing as its core mission. Since its foundation, the organization has been focusing on the research and development of the best technologies becoming in this way a global reference for the manufacturing of threading solutions. Products and production process quality has been for over 90 years a milestone, which still distinguishes Yamawa from its competitors: triple quality control on 100% of production, regular calibration of the machinery and the warranty of correspondence to Yamawa s production norms on each tools produced. Yamawa has been the first Japanese threading taps manufacturer to achieve ISO9001 certification. The company combines innovation of products and processes with high care for the environment and therefore has limited to the bare minimum the impact of its manufacturing plants and achieved ISO14001 in all the production sites. Yamawa is headquartered in Tokyo and has 4 manufacturing sites distributed throughout Japan: Yonezawa, Fukushima, Aizu and Tsutsumi. With subsidiaries and commercial partners all over the world, Yamawa distributes its products globally and has reinforced the presence in Europe through the foundation of Yamawa Europe, based in Venezia-Mestre (Italy) which officially started operations on January 1 st, About this Quick Guide The Quick Guide is a document designed to provide an introduction and summary of all the most important information included in our new general catalogue. The document presents a selection of all the main product lines arranged by work-piece material and the most relevant technical information: - Simplified product search - Easy access to technical information - Light and handy printed edition The Quick Guide is not meant to be a replacement of the catalogue but rather a complement to it as a taps quick selection tool. The general catalogue is always the main choice to have an overview of the complete range and to access all the technical information. All latest updates and documents in digital format are available at 1

3 Yamawa japanese factories Yonezawa Plant (ISO9001:1996) Yonezawa Plant(ISO14001:2003) (ISO9001:1996) (ISO14001:2003) Fukushima Plant (ISO9001:2000) Fukushima Plant(ISO14001:2002) (ISO9001:2000) (ISO14001:2002) Yonezawa is the main manufacturing plant of the Yamawa Group, this location is equipped with production lines and is the Quality Control Center. The plant obtained ISO9001 certification in Of the four Yamawa plants, the Yonezawa location has the longest history of manufacturing and the highest production capacity. Products include roll taps, spiral pointed, pipe and hand taps. The Yonezawa Plant stepped ahead of our competitors by receiving ISO9001 before any other cutting tool manufacturers in Japan. The Fukushima plant provides both tap production lines and in house facilities for the manufacturing of specialized production machine tools to produce the exceptional high quality cutting tools. This plant develops and manufactures special taps and die production equipments. It also supplies these machines to our other manufacturing sites. Products include spiral fluted taps, dies and combined drills/countersinks as well as production machinery. Aizu Plant Tsutsumi Plant Aizu Plant (ISO9001:2000) (ISO14001:2002) Tsutsumi Plant (ISO9001:2011) (ISO14001:2011) Equipped with the most sophisticated machine tools available, this plant is famous for its automation and robotized labor saving manufacturing processes. The plant is designed for mass production of the highest quality cutting tools and screw thread tools. Products include spiral fluted taps and carbide taps. The Tsutsumi plant is the main tool blank manufacturing operation of Yamawa group. This location is also the testing center where Yamawa executes the innovation in metal machining and performance tests of the products for the Yamawa group. 2

4 CONTENTS ISO Code p. 04 Hardness conversion table p. 05 Explanation of icons p. 06 Cutting taps applications p. 07 Forming taps applications p. 35 Technical information p. 43 Old-new code cross reference p. 73 Line-up index p. 76 3

5 ISO Code Cutting taps Roll taps Gr. Materials Features Page No. P1 Free cutting steel and structural steel Rm < 500 N/mm P2 Carbon steel and low alloy steel Rm N/mm P3 Medium alloy steel and heat treated steel Rm N/mm P4 High alloy steel Rm N/mm P5 Tool steel Rm N/mm P6 High tensile strength steel Rm N/mm M1 Ferritic stainless steel Rm N/mm M2 Austenitic stainless steel - good machinability Rm N/mm M3 Austenitic stainless steel - medium machinability Rm N/mm M4 Martensitic stainless steel Rm N/mm M5 PH stainless steel Rm N/mm K1 Grey cast iron HB K2 Nodular cast iron HB K3 Austenitic cast iron HB K4 ADI cast iron HB N1 Alluminium alloys < 12% Si N2 Alluminium alloys > 12% Si N3 Copper alloys N4 Brass alloys and bronze alloys N5 Plastic materials N6 Fiber and composites S1 Heat resistant super alloys - good machinability HRC < S2 Heat resistant super alloys - medium machinability HRC S3 Heat resistant super alloys - low machinability HRC S4 Low alloy Titanium - good machinability S5 High alloy Titanium - medium machinability H1 Hardened general steel HRC H2 Hardened bearing steel HRC H3 Hardened tool steel HRC H4 Hardened martensitic stainless steel HRC H5 Hardened white cast iron HRC Refer to pages of the catalogue for the complete list of work materials. 4

6 Hardness conversion table Hardness conversion table Conversion table from from Rockwell C C hardness of of steel steel. (Approximate) Rockwell C Scale Hardness Vickers Hardness Brinell Hardness Rockwell Hardness *2 Rockwell Superficial Hardness Standard ball Tungsten Carbide ball A scale B scale D scale 15-N scale 30-N scale 45-N scale Shore Hardness Tensile Strength MPa *1 Rockwell C Scale Hardness *2 HRC HV HB HRA HRB HRD HS15N HS30N HS45N HS HRC *1: 1Mpa=1N/mm : 2 2 *2: : In In above above table, table, numbers numbers in in parenthesis are are only only for for reference. reference. This This table table is is abstracted abstracted from from SAE SAE J

7 Explanation of icons Class E High Speed Steel Coating Powder High Speed Steel Coated High Speed Steel Oxidizing Powder High Speed Steel Oxidizing Class E High Speed Steel Oxidizing Powder High Speed Steel Nitriding / Oxidizing Class E High Speed Steel Nitriding/Oxidizing Ultra-fine micro grain cemented carbide NI Class E High Speed Steel Nitriding Coating Ultra-fine micro grain cemented carbide Coated Coating Class E High Speed Steel Coated For blind hole with through coolant hole Cobalt High Speed Steel For through hole with radial coolant hole Coating Cobalt High Speed Steel Coated For synchronized feeding NI Powder High Speed Steel Nitriding >2xD For blind hole >2xD 6

8 CUTTING TAPS APPLICATIONS ISO P p. 18 p. 12 ISO M p. 16 p. 18 ISO K p. 20 p. 22 ISO N p. 24 p. 26 ISO S p. 28 p. 30 ISO H p. 32 p. 32 7

9 ISO P Steel System chart of taps for blind holes on ISO P - steel ~ 45HRC Low Tapping speed ISO Identification Vc(m/min) 5m/min 10m/min 15m/min 20m/min 30m/min50m/min numbers Materials Area of full rigid lead feed High Materials ISO Identification numbers P6 High tensile strength steel (X3 NiCrMo ) EH-HT (X3 NiCrMo ) High tensile strength steel P6 PH-SP P5 Tool steel (X 40 CrMoV 5 1) (X 40 CrMoV 5 1) Tool steel P5 P4 High alloy steel C 105 W2 SP+VA SP-VA SP-VA (Coating) SU2- SP HFIHS HFISP C 105 W2 High alloy steel P4 P3 Medium alloy steel and heat treated steel (25 CrMo 4) (42Cr 4) ZEN-B LO-SP LO-SP OX (25 CrMo 4) (42Cr 4) Medium alloy steel and heat treated steel P3 P2 P1 Carbon steel and low alloy steel Free cutting and structural steel (C45) C30 C25 St44-2 SP SP-BLF HT E-SP SP OX SP-BLF OX SP (Coating) SP-BLF (Coating) AUXSP AU+SP F-SP (C45) C30 C25 St44-2 Carbon steel and low alloy steel Free cutting and structural steel P2 P1 5m/min 10m/min 15m/min 20m/min 30m/min 50m/min An image telling possible applications 8

10 Part 1 - General purpose and universal NEW CODE OLD CODE M MF UNC/UNF HT 9 20 M2~ MF3~ No. 4~1.3/4 141 LO-SP 9 41 LO-SP 9 41OX SP 9 40 GENERAL PURPOSE SP 9 40OX Please refer to Yamawa general catalogue page M2~30 70 MF8~24 70 M2~30 73 MF5~30 73 M2~48 53 MF7~48 53 M2~48 60 MF4~48 60 No. 4~1.3/4 No. 4~1.3/ SP 9 40TI Coating M2~24 58 MF8~22 58 SP-BLF 9 47 >2xD SP-BLF SP-BLF 9 47OX 9 47TI >2xD Coating >2xD UNIVERSAL AU+SP 9 86TI Coating AUXSP 9 86TI Coating for a complete view on sizes, tolerances and chamfers available M3~39 83 M3~39 86 M3~24 85 M3~20 66 MF8~20 66 M6~12 67 MF8~12 67 FORMING TAPS CUTTING TAPS ISO N ISO P - ISO M ISO H ISO S ISO N ISO K ISO M ISO P TECHNICAL INFORMATION G/Rp 1/16~1.1/ /8~1 71 1/8~1 74 1/16~1.1/ /16~1.1/2 63 1/8-1/2 58 BSW 1/8~1.3/ /16~1 335 NPT/NPTF 1/16~ /16~1 594 Rc 1/16~ /16~2 558 NPS/NPSF 1/8~ PG 7~ indicates the missing number to complete the old code as follows: 3=371 UN 4=374/376 UN 6=371 M 7=376 M 8=374 MF 9=5156 G 9

11 ISO P Steel System chart of taps for blind holes on ISO P - steel ~ 45HRC Low Tapping speed ISO Identification Vc(m/min) 5m/min 10m/min 15m/min 20m/min 30m/min50m/min numbers Materials Area of full rigid lead feed High Materials ISO Identification numbers P6 High tensile strength steel (X3 NiCrMo ) EH-HT (X3 NiCrMo ) High tensile strength steel P6 PH-SP P5 Tool steel (X 40 CrMoV 5 1) (X 40 CrMoV 5 1) Tool steel P5 P4 High alloy steel C 105 W2 SP+VA SP-VA SP-VA (Coating) SU2-SP SP HFIHS HFISP C 105 W2 High alloy steel P4 P3 Medium alloy steel and heat treated steel (25 CrMo 4) (42Cr 4) ZEN-B LO-SP LO-SP OX (25 CrMo 4) (42Cr 4) Medium alloy steel and heat treated steel P3 P2 P1 Carbon steel and low alloy steel Free cutting and structural steel (C45) C30 C25 St44-2 SP SP -BLF HT E-SP SP OX SP- BLF OX SP (Coating) SP-BLF (Coating g) AUXSP AU+SP F-SP (C45) C30 C25 St44-2 Carbon steel and low alloy steel Free cutting and structural steel P2 P1 5m/min 10m/min 15m/min 20m/min 30m/min 50m/min An image telling possible applications 10

12 Part 2 - Special purpose and high speed NEW CODE OLD CODE M MF UNC/UNF E-SP 9 46OX M3~24 77 MF10~ SP-VA 9 45OX SP-VA 9 45TC SPECIAL PURPOSE SP+VA 9 85OX SU2-SP 9 44OX ZEN-B 1 40OX PH-SP 9 48OX EH-HT 2 20 HIGH SPEED F-SP HFISP HFIHS Coating Coating Coating Coating Please refer to Yamawa general catalogue page M2~36 79 MF8~24 80 No. 4~2 80 M3~20 82 M3~12 78 M3~24 87 MF10~ M3~24 for a complete view on sizes, tolerances and chamfers available 89 MF8~16 89 No. 4~1 90 M3~30 75 MF8~30 75 M3~ MF8~ No. 4~3/4 271 M3~12 93 MF10~12 93 No. 4~3/4 220 M6~20 95 MF10~20 95 M6~20 94 MF10~20 94 FORMING TAPS CUTTING TAPS ISO N ISO P - ISO M ISO H ISO S ISO N ISO K ISO M ISO P TECHNICAL INFORMATION G/Rp 1/8~3/4 81 1/8~3/4 87 1/8~1/2 76 1/8~1/2 146 BSW 3/16~1 354 NPT/NPTF 1/16~ /8~3/4 304 Rc NPS/NPSF PG indicates the missing number to complete the old code as follows: 3=371 UN 4=374/376 UN 6=371 M 7=376 M 8=374 MF 9=5156 G 11

13 ISO P Steel System chart of taps for through holes on ISO P - steel ~ 45HRC ISO Identification numbers Materials Low Tapping speed High Vc(m/min) 5m/min 10m/min 15m/min 20m/min 30m/min 50m/min Area of full rigid lead feed Materials ISO Identification numbers P6 High tensile strength steel (X3 NiCrMo ) EH-HT EH-PO (X3 NiCrMo ) High tensile strength steel P6 P5 Tool steel (X 40 CrMoV 5 1) (X 40 CrMoV 5 1) Tool steel P5 P4 High alloy steel C 105 W2 PO-VA (Coating) ZEN-P SL+VA MHS HSL C 105 W2 High alloy steel P4 P3 Medium alloy steel and heat treated steel (25 CrMo 4) (42Cr 4) PO-VA AUXSL (25 CrMo 4) (42Cr 4) Medium alloy steel and heat treated steel P3 P2 Carbon steel and low alloy steel (C45) C30 PO HT (C45) C30 Carbon steel and low alloy steel P2 PO (Coating) P1 Free cutting and structural steel C25 St44-2 PO OX AU+SL F-SL HDISL C25 St44-2 Free cutting and structural steel P1 50m/min 5m/min 10m/min 15m/min 20m/min 30m/min An image telling possible applications 12

14 Part 1 - General purpose and universal NEW CODE OLD CODE M MF UNC/UNF HT 9 20 M2~ MF3~ GENERAL PURPOSE PO 9 30 PO 9 30OX PO 9 30TI UNIVERSAL AU+SL 9 66TI AUXSL 9 66TI Coating Coating Coating Please refer to Yamawa general catalogue page M1.4~ MF4~ M2~ MF4~ No. 4~1.3/4 No. 4~1.3/4 No. 4~1.3/ M2~ MF8~ M3~ MF8~ M6~ MF8~ for a complete view on sizes, tolerances and chamfers available FORMING TAPS CUTTING TAPS ISO N ISO P - ISO M ISO H ISO S ISO N ISO K ISO M ISO P TECHNICAL INFORMATION G/Rp 1/16~1.1/ /16~1.1/ /16~1.1/ /8~1/2 118 BSW 1/8~1.1/2 401 NPT/NPTF 1/16~ Rc 1/16~4 551 NPS/NPSF 1/8~ PG 7~ indicates the missing number to complete the old code as follows: 3=371 UN 4=374/376 UN 6=371 M 7=376 M 8=374 MF 9=5156 G 13

15 ISO P Steel System chart of taps for through holes on ISO P - steel ~ 45HRC ISO Identification numbers Materials Low Tapping speed High Vc(m/min) 5m/min 10m/min 15m/min 20m/min 30m/min 50m/min Area of full rigid lead feed Materials ISO Identification numbers P6 High tensile strength steel (X3 NiCrMo ) EH-HT EH-PO (X3 NiCrMo ) High tensile strength steel P6 P5 Tool steel (X 40 CrMoV 5 1) (X 40 CrMoV 5 1) Tool steel P5 P4 High alloy steel C 105 W2 PO-VA (Coating) ZEN-P SL+VA MHSL C 105 W2 High alloy steel P4 P3 Medium alloy steel and heat treated steel (25 CrMo 4) (42Cr 4) PO-VA AUXSL (25 CrMo 4) (42Cr 4) Medium alloy steel and heat treated steel P3 P2 Carbon steel and low alloy steel (C45) C30 PO HT (C45) C30 Carbon steel and low alloy steel P2 PO (Coating) P1 Free cutting and structural steel C25 St44-2 PO OX AU+SL F-SL HDISL C25 St44-2 Free cutting and structural steel P1 50m/min 5m/min 10m/min 15m/min 20m/min 30m/min An image telling possible applications 14

16 Part 2 - Special purpose, high performance and high speed NEW CODE OLD CODE M MF UNC/UNF PO-VA 9 35OX M2~ MF8~ No. 4~2 128 PO-VA 9 35TC SPECIAL PURPOSE SL+VA 9 65OX ZEN-P 1 30NX EH-PO 2 30 EH-HT 2 20 HIGH PERFOR- MANCE HIGH SPEED MHSL F-SL HDISL Coating Coating Coating Coating Please refer to Yamawa general catalogue page M2~ M3~ M3~ MF10~ No. 6~1 130 M3~ MF8~ M3~24 for a complete view on sizes, tolerances and chamfers available 145 MF8~ No. 4~3/4 271 M6~ MF10~ M3~ MF10~ No. 4~3/4 224 M6~ MF10~ FORMING TAPS CUTTING TAPS ISO N ISO P - ISO M ISO H ISO S ISO N ISO K ISO M ISO P TECHNICAL INFORMATION G/Rp 1/8~1/2 146 BSW 3/16~3/4 417 NPT/NPTF 1/8~3/4 304 Rc NPS/NPSF PG indicates the missing number to complete the old code as follows: 3=371 UN 4=374/376 UN 6=371 M 7=376 M 8=374 MF 9=5156 G 15

17 ISO M Stainless steel ISO Identification numbers Materials Low Vc(m/min) Tapping speed High 5m/min 10m/min 15m/min 20m/min 30m/min Area of full rigid lead feed Materials ISO Identification numbers M (AISI904L) (AISI904L) M4 M3 M2 Stainless steels (AISI316) DUPLEX (AISI304) AU+SP AUXSP SU2-SP (AISI316) DUPLEX (AISI304) Stainless steels M3 M2 M (AISI303) SP+VA SP-VA SP-VA (Coating) ZEN-B (AISI303) M1 Vc(m/min) 5m/min 10m/min 15m/min 20m/min 30m/min An image telling possible applications 16

18 NEW CODE OLD CODE M MF UNC/UNF UNIVERSAL AU+SP 9 86TI AUXSP 9 86TI SP-VA 9 45OX SP-VA 9 45TC Coating Coating Coating M3~20 66 MF8~20 66 SPECIAL PURPOSE SP+VA 9 85OX Please refer to Yamawa general catalogue page M6~12 67 MF8~12 67 M2~36 79 MF8~24 80 No. 4~2 80 M3~20 82 M3~12 78 SU2-SP 9 44OX M3~24 87 MF10~ ZEN-B 1 40OX for a complete view on sizes, tolerances and chamfers available M3~24 89 MF8~16 89 No. 4~1 90 FORMING TAPS CUTTING TAPS ISO N ISO P - ISO M ISO H ISO S ISO N ISO K ISO M ISO P TECHNICAL INFORMATION G BSW NPT/NPTF 1/8~3/4 81 3/16~ /16~ /8~3/4 87 STI (EG) UNC/UNF No. 2~1/2 218 indicates the missing number to complete the old code as follows: 3=371 UN 4=374/376 UN 6=371 M 7=376 M 8=374 MF 9=5156 G 17

19 ISO M Stainless steel ISO Identification numbers Materials Low Vc(m/min) Tapping speed High 5m/min 10m/min 15m/min 20m/min 30m/min Area of full rigid lead feed Materials ISO Identification numbers M (AISI904L) (AISI904L) M4 M3 M2 Stainless steels (AISI316) DUPLEX (AISI304) AU+SL ZEN-P AUXSL (AISI316) DUPLEX (AISI304) Stainless steels M3 M2 M (AISI303) PO-VA PO-VA (Coating) SL+VA (AISI303) M1 Vc(m/min) 5m/min 10m/min 15m/min 20m/min 30m/min An image telling possible applications 18

20 NEW CODE OLD CODE M MF UNC/UNF UNIVERSAL AU+SL 9 66TI AUXSL 9 66TI PO-VA 9 35OX SPECIAL PURPOSE PO-VA 9 35TC Coating Coating Coating M3~ MF8~ SL+VA 9 65OX Please refer to Yamawa general catalogue page M6~ MF8~ M2~ MF8~ No. 4~2 128 M2~ M3~ ZEN-P 1 30NX M3~ MF10~ No. 6~1 130 for a complete view on sizes, tolerances and chamfers available FORMING TAPS CUTTING TAPS ISO N ISO P - ISO M ISO H ISO S ISO N ISO K ISO M ISO P TECHNICAL INFORMATION BSW 3/16~3/4 417 NPT/NPTF STI (EG) UNC/UNF No. 2~1/2 249 indicates the missing number to complete the old code as follows: 3=371 UN 4=374/376 UN 6=371 M 7=376 M 8=374 MF 9=5156 G 19

21 ISO K Cast iron ISO Identification numbers Materials Low Vc(m/min) Tapping speed 5m/min 10m/min 15m/min 20m/min Area of full rigid lead feed 30m/min High 50m/min Materials ISO Identification numbers K4 ADI cast iron GG-HT (Coating) ADI cast iron K4 K3 Austenitic cast iron GG-HT-OH (Coating) Austenitic cast iron K3 K2 Nodular cast iron GG-HT CT-FC HFISP HFICT-B Nodular cast iron K2 GG-HT-OH K1 Grey cast iron Grey cast iron K1 Vc(m/min) 5m/min 10m/min 15m/min 20m/min 30m/min 50m/min An image telling possible applications 20

22 NEW CODE OLD CODE M MF UNC/UNF GG-HT 9 26NI GG-HT 9 26TC SPECIAL PURPOSE GG-HT-OH GG-HT-OH 9 26NIOH 9 26TCOH CT-FC 3 26 HFISP HIGH SPEED HFICT-B NI Coating NI Coating Coating Coating M3~ MF8~ /4~3/4 264 Please refer to Yamawa general catalogue page M3~ MF8~ M6~ MF8~ M6~ MF8~ M3~ MF8~ No. 10~5/8 278 M6~20 for a complete view on sizes, tolerances and chamfers available 95 MF10~20 95 M6~ MF10~ FORMING TAPS CUTTING TAPS ISO N ISO P - ISO M ISO H ISO S ISO N ISO K ISO M ISO P TECHNICAL INFORMATION G/Rp 1/8~ /8~1/ /8~ NPT/NPTF 1/8~ Rc 1/16~ /8~1 573 indicates the missing number to complete the old code as follows: 3=371 UN 4=374/376 UN 6=371 M 7=376 M 8=374 MF 9=5156 G 21

23 ISO K Cast iron ISO Identification numbers Materials Low Vc(m/min) Tapping speed 5m/min 10m/min 15m/min 20m/min Area of full rigid lead feed 30m/min High 50m/min Materials ISO Identification numbers K4 ADI cast iron GG-HT (Coating) ADI cast iron K4 K3 Austenitic cast iron Austenitic cast iron K3 K2 Nodular cast iron GG-HT CT-FC HDISL HFICT-P Nodular cast iron K2 K1 Grey cast iron Grey cast iron K1 Vc(m/min) 5m/min 10m/min 15m/min 20m/min 30m/min 50m/min An image telling possible applications 22

24 NEW CODE OLD CODE M MF UNC/UNF GG-HT 9 26NI SPECIAL PURPOSE GG-HT 9 26TC CT-FC 3 26 HDISL HIGH SPEED HFICT-P NI Coating Coating Coating M3~ MF8~ /4~3/4 264 Please refer to Yamawa general catalogue page M3~ MF8~ M3~ MF8~ No. 10~5/8 278 M6~ MF10~ M6~ MF10~ for a complete view on sizes, tolerances and chamfers available FORMING TAPS CUTTING TAPS ISO N ISO P - ISO M ISO H ISO S ISO N ISO K ISO M ISO P TECHNICAL INFORMATION G/Rp 1/8~ /8~1/ /8~ NPT/NPTF 1/8~ Rc 1/16~ /8~1 573 indicates the missing number to complete the old code as follows: 3=371 UN 4=374/376 UN 6=371 M 7=376 M 8=374 MF 9=5156 G 23

25 ISO N Non ferrous materials ISO Identification numbers Materials Low Vc(m/min) Tapping speed 5m/min 10m/min 20m/min 30m/min 50m/min Area of full rigid lead feed High 100m/min Materials ISO Identification numbers N1 Aluminum alloy (<12% Si) AUXSP HFAHS HFASP Aluminum alloy (<12% Si) N1 N2 Aluminum alloy (>12% Si) AXE-HT AU+SP MC-AD-CT Aluminum alloy (>12% Si) N2 Bronze Bronze N4 Brass casting AL+SP AL-SP Brass casting N4 N3 Copper Brass HFACT-B Copper Brass N3 Vc(m/min) 5m/min 10m/min 20m/min 30m/min 50m/min 100m/min An image telling possible applications 24

26 NEW CODE OLD CODE M MF UNC/UNF UNIVERSAL AU+SP 9 86TI AUXSP 9 86TI SPECIAL PURPOSE AL+SP 9 43NI AL-SP 9 43NI HIGH PERFORMANCE HIGH SPEED AXE-HT MC-AD-CT HFASP HFAHS HFACT-B Coating Coating NI NI Coating Coating Coating Coating Coating M3~20 66 MF8~20 66 Please refer to Yamawa general catalogue page M6~12 67 MF8~12 67 M2~6 69 M8~16 69 MF10~ No. 2~1/2 205 M6~ MF8~ M6~12 for a complete view on sizes, tolerances and chamfers available 487 MF10~ M6~12 97 MF10~12 97 M6~12 96 MF10~12 96 M6~ MF10~ FORMING TAPS CUTTING TAPS ISO N ISO P - ISO M ISO H ISO S ISO N ISO K ISO M ISO P TECHNICAL INFORMATION STI (EG) M 3~ indicates the missing number to complete the old code as follows: 3=371 UN 4=374/376 UN 6=371 M 7=376 M 8=374 MF 9=5156 G 25

27 ISO N Non ferrous materials ISO Identification numbers Materials Low Vc(m/min) Tapping speed 5m/min 10m/min 20m/min 30m/min 50m/min Area of full rigid lead feed High 100m/min Materials ISO Identification numbers N1 N2 Aluminum alloy (<12% Si) Aluminum alloy (>12% Si) LA-HT AU+SL AUXSL HDISL Aluminum alloy (<12% Si) Aluminum alloy (>12% Si) N1 N2 Bronze Bronze N4 Brass casting Brass casting N4 N3 Copper Brass HFACT-P Copper Brass N3 Vc(m/min) 5m/min 10m/min 20m/min 30m/min 50m/min 100m/min An image telling possible applications 26

28 NEW CODE OLD CODE M MF STI (EG) M STI (EG) UNC/UNF UNIVERSAL AU+SL 9 66TI AUXSL 9 66TI SPECIAL PURPOSE LA-HT 9 23NI HDISL HIGH SPEED HFACT-P Coating Coating NI Coating Coating M3~ MF8~ Please refer to Yamawa general catalogue page M6~ MF8~ M3~ MF8~ ~ No. 4~3/4 468 M6~ MF10~ M6~ MF10~ for a complete view on sizes, tolerances and chamfers available FORMING TAPS CUTTING TAPS ISO N ISO P - ISO M ISO H ISO S ISO N ISO K ISO M ISO P TECHNICAL INFORMATION indicates the missing number to complete the old code as follows: 3=371 UN 4=374/376 UN 6=371 M 7=376 M 8=374 MF 9=5156 G 27

29 ISO S Heat resistant alloys ISO Identification numbers Materials Low Vc(m/min) 5m/min Area of full rigid lead feed Tapping speed 10m/min High Materials ISO Identification numbers S5 Medium and high Titanium alloys ZET-B Medium and high Titanium alloys S5 S4 Low and medium Titanium alloys Low and medium Titanium alloys S4 S3 S2 S1 Nickel base alloys (inconel, hastelloy...) ZEN-B Nickel base alloys (inconel, hastelloy...) S3 S2 S1 Vc(m/min) 5m/min 10m/min An image telling possible applications 28

30 NEW CODE OLD CODE M MF UNC/UNF SPECIAL PURPOSE ZEN-B 1 40OX M3~24 89 MF8~16 89 No. 4~1 90 ZET-B 1 41NI NI Please refer to Yamawa general catalogue page M3~24 91 MF8~16 91 No. 4~3/4 92 for a complete view on sizes, tolerances and chamfers available FORMING TAPS CUTTING TAPS ISO N ISO P - ISO M ISO H ISO S ISO N ISO K ISO M ISO P TECHNICAL INFORMATION STI (EG) UNC/UNF No. 2~1/2 218 indicates the missing number to complete the old code as follows: 3=371 UN 4=374/376 UN 6=371 M 7=376 M 8=374 MF 9=5156 G 29

31 ISO S Heat resistant alloys ISO Identification numbers Materials Low Vc(m/min) 5m/min Tapping speed Area of full rigid lead feed 10m/min High Materials ISO Identification numbers S5 Medium and high Titanium alloys ZET-P Medium and high Titanium alloys S5 S4 Low and medium Titanium alloys Low and medium Titanium alloys S4 S3 S2 S1 Nickel base alloys (inconel, hastelloy...) ZEN-P Nickel base alloys (inconel, hastelloy...) S3 S2 S1 Vc(m/min) 5m/min 10m/min An image telling possible applications 30

32 NEW CODE OLD CODE M MF UNC/UNF SPECIAL PURPOSE ZEN-P 1 30NX M3~ MF10~ No. 6~1 130 ZET-P 1 49NI NI Please refer to Yamawa general catalogue page M3~ MF8~ No. 2~3/4 222 for a complete view on sizes, tolerances and chamfers available FORMING TAPS CUTTING TAPS ISO N ISO P - ISO M ISO H ISO S ISO N ISO K ISO M ISO P TECHNICAL INFORMATION STI (EG) UNC/UNF No. 2~1/2 249 indicates the missing number to complete the old code as follows: 3=371 UN 4=374/376 UN 6=371 M 7=376 M 8=374 MF 9=5156 G 31

33 ISO H Hardened steel System chart of taps for blind and through holes on ISO H - hardened steel 45 63HRC Low Tapping speed High ISO Identification Identification numbers Materials Vc(m/min) Area of full rigid lead feed 5m/min 10m/min Materials ISO numbers UH-CT 63HRC 63HRC H Hardened steel 55HRC 55HRC Hardened steel H 45HRC 45HRC EH-CT Vc(m/min) 5m/min 10m/min An image telling possible applications 32

34 NEW CODE OLD CODE M MF SPECIAL PURPOSE EH-CT Coating M3~ UH-CT Coating Please refer to Yamawa general catalogue page M3~ MF10~ indicates the missing number to complete the old code as follows: 3=371 UN 4=374/376 UN 6=371 M 7=376 M 8=374 MF 9=5156 G for a complete view on sizes, tolerances and chamfers available FORMING TAPS CUTTING TAPS ISO N ISO P - ISO M ISO H ISO S ISO N ISO K ISO M ISO P TECHNICAL INFORMATION 33

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36 FORMING TAPS APPLICATIONS Introduction to Thread Forming Taps p. 36 ISO P and ISO M p. 38 ISO N p

37 Introduction to Thread Forming Taps (Roll Taps) Thread Forming Taps are the tools used for producing internal threads by a thread forming process. Currently, Yamawa s Thread Forming Taps have a good reputation by being used in many areas. They are widely used along with the diversity of workpieces and with the change into miniaturization of workpieces. Followings are the characteristics and features of Introduction Thread Forming Taps (Roll to Taps) Thread which are Forming not available with Taps cutting (Roll taps. Taps) Features of Roll Taps Tapping without producing chips. They are suitable for blind hole tapping. In producing internal threads with no chips, they save you a time for chip disposal. Roll taps are stronger than cutting taps due to their design. The effect of fluteless design gives a large cross-section area to the Thread Forming Taps are the tools used for producing internal threads by a thread forming process. Currently, YAMAWA's Thread tap, and there is no worry of chip jamming, which makes Roll taps very tough against breakage. Forming Taps have a good reputation by being used in large area. They are widely used along with the diversity of workpieces and with Roll taps produce excellent pitch diameter well within pitch diameter tolerances. Material deformation process produces the the change into miniaturization of workpieces. Followings are the characteristics and features of Thread Forming Taps (Roll Tap) which cutting internal type taps threads do not with have. good surface finish as well as precise pitch diameter. High efficiency and tool life. The configuration of the lobes at the crests of the tap threads makes high speed tapping <Features possible of and Roll extends Taps> tool life compared with cutting type taps. The addition of a supplemental tap surface treatment, such as Tapping Oxidizing, without Nitriding, producing TiN, and chips. TiCN can They extend are suitable tool life for 2 blind to 20 hole times tapping. over In an producing uncoated internal (bright) threads tap performance. with no chips, they save you a time for chip disposal. Roll Points taps to are note stronger during than a Roll cutting tapping taps operation due to their design. The effect of fluteless design gives a large cross-section area to the tap, and Tapping there is no torque worry is of 2 chip to 3 jamming, times larger which than makes that Roll of taps cutting very tough type taps. against breakage. Roll Roll taps tapping produce is only excellent applicable pitch to materials diameter producing well within stringy pitch chips. diameter tolerances. Material deformation process produces the internal The deviation threads with of good hole surface size before finish tapping as well as should precise pitch be about diameter. 5% of pitch. The control of hole size before tapping should be more High severe efficiency than that and of tool cutting life type The configuration taps. of the lobes at the crests of the tap threads makes high speed tapping possible and extends tool The life selection compared of with lubricants cutting type is important taps. The addition to prevent of a supplemental sticking or welding. tap surface treatment, such as Oxidizing, Nitriding, TiN, and TiCN can extend Burrs tool at life the 2 face to 20 of times an internal over an uncoated thread are (bright) larger tap than performance. those produced by cutting type taps. In some cases it is necessary to take additional countersink processing at the top of hole. <Points to note during a Roll tapping operation> In the minor diameter of internal thread, U-shape form (Tine form) at the hole entrance can be seen. U-shape form is never Tapping torque is 2 to 3 times larger than that of cutting type taps. seen when using cutting type taps. Roll tapping is only applicable to stringy materials. The Selection deviation of of hole Yamawa size before Roll tapping Taps should be about 5% of pitch. The control of hole size before tapping should be more severe than that of cutting type taps. Types of Roll Taps. Yamawa produces various types of Roll Taps which include General purpose taps, Special purpose taps The for selection non-ferrous of lubricants and is steel, important as well to prevent as special sticking purpose or welding. taps with surface treatment for the specified applications. To provide Burrs for at longer the face tool of an life, internal specially thread are developed larger than premium those produced materials by cutting are also type used taps. In together some cases with is physical necessary vapor to take deposition additional countersink (PVD) processing such at as the TiN top and of hole. TiCN. In particular, OL-RZ is superior product developed for dry machining with regards to tapping coating In the environment minor diameter and of performance. internal thread, U-shape form (Tine form) at the hole entrance can be seen. U-shape form is never seen when using cutting type Tap taps. Materials. Yamawa s standard tap material is SKH58 designed for improving torque, superior anti-friction properties as well <Selection as toughness. of YAMAWA To extend Roll tool Taps> life, we use SKH56, or SKH10(Powder HSS) which is the best tap material for antifriction. Tolerance Class. Using the datum 12.7μm in a step form, in accordance with standard GH class, we made up Yamawa s G Types of Roll Taps YAMAWA produces various types of Roll Taps which include General purpose taps, Special purpose taps for non-ferrous and class system. The differences in materials being Roll tapped, as well as hole size, contribute to differences in thread forming. steel, as well as special purpose taps with surface treatment for the specified applications. To provide for longer tool life, specially developed premium Yamawa materials offers are 2 to also 3 oversized used together tap tolerance with physical classes vapor in deposition order to achieve (PVD) such the as most TiN and suitable TiCN. In internal particular, thread OL-RZ pitch is superior diameter product size. developed Chamfer for length. dry machining Chamfer with lengths: good regards 2 pitches to tapping for blind environment hole use and and performance. 4 pitches for through hole use. Basically 4 pitches have Tap longer Materials tool life YAMAWA's than 2 standard pitches because tap material force is SKH58 applied designed on one for improving blade at 4 torque, pitch superior chamfer anti-friction is smaller properties than that as at well 2 pitch as toughness. chamfer. To extend However, tool it life, is difficult we use SKH56, to say or about SKH10(Powder tool life HSS) in a few which words is the because best tap material each different for antifriction. tapping condition influences the tool life. Tolerance Class Using the datum 12.7μm in a step form, in accordance with standard GH class, we made up YAMAWA's G class system. The differences in materials being Roll tapped, as well as hole size, contribute to differences in thread forming. YAMAWA offers 2 to 3 oversized tap tolerance classes in order to achieve the most suitable internal thread pitch diameter size. Chamfer length Chamfer lengths : 2 pitches for blind hole use and 4 pitches for through hole use. Basically 4 pitches have longer tool life than 2 pitches because force applied on one blade at 4 pitch chamfer is smaller than that at 2 pitch chamfer. However, it is difficult to say about tool life in a few words because each different tapping condition influences the tool life. 36 <Shape of internal threads and the ratio of thread engagement affected by bored hole diameter> Compared with the basic height of thread engagement, the actual height of the thread engagement is called "thread engagement ratio" in percentage. Depending on the bored hole diameter, internal threads and thread engagement ratio will change. In tapping, the tapping condition must be chosen by referring to the thread engagemet ratio. In tapping, it can reduce cutting space and forming space to make bored hole diameters as large as possible. This, through reducing the load on taps, can restrict tap's wear and damage.

38 Introduction to Thread Forming Taps (Roll Taps) Shape of internal threads and the ratio of thread engagement affected by bored hole diameter Compared with the basic height of thread engagement, the actual height of the thread engagement is called "thread engagement ratio" in percentage. Depending on the bored hole diameter, internal threads and thread Introduction engagement to ratio Thread will change. Forming Taps (Roll Taps) In tapping, the tapping condition must be chosen by referring to the thread engagement ratio. The portion of material to be formed can be reduced by selecting the largest possible bored hole diameter. In this way the load on taps is reduced, decreasing tap s wear and damage. S50C, minor diameter of threads cut M24x3 minor dia tolerance of internal threads ~ S50C internal threads cut M24x3 bored hole size : minor dia tolerance of internal threads NG thread engagement ratio: 103.1% S50C internal threads cut M24x3 bored hole size : minor dia tolerance of internal threads: Middle thread engagement ratio: 92.4% S50C internal threads cut M24x3 bored hole size : minor dia tolerance of internal threads NG thread engagement ratio: 81.5% Internal threads External threads Aluminum, minor diameter of threads formed M25x2 minor dia tolerance of internal threads ~ Aluminum, internal threads formed M25x2 bored hole size : minor diameter of finished internal threads : mm minor dia tolerance of internal threads NG thread engagement ratio: 105.2% Aluminum, internal threads formed M25x2 bored hole size : mm minor diameter of finished internal threads : mm minor dia tolerance of internal threads : Middle thread engagement ratio: 89.3% Aluminum, internal threads formed M25x2 bored hole size : mm minor diameter of finished internal threads : mm minor dia tolerance of internal threads NG thread engagement ratio: 71.0% Internal threads External thread side TECHNICAL INFORMATION FORMING TAPS CUTTING TAPS ISO N ISO P - ISO M ISO H ISO S ISO N ISO K ISO M ISO P 37

39 ISO P Steel - ISO M Stainless steel ISO Identification numbers M3 M2 M1 Materials Stainless steels AISI AISI AISI303 Low Tapping speed 5m/min Vc(m/min) 10m/min 15m/min 20m/min 25m/min 30m/min Area of full rigid lead feed OL+RZ HP+RZ HP-RZ High Materials AISI AISI AISI303 Stainless steels ISO Identification numbers M3 M2 M1 P5 Tool steel X 40 CrMoV 5 1 X 40 CrMoV 5 1 Tool steel P5 P4 High alloy steel C 105 W2 MHRZ C 105 W2 High alloy steel P4 P3 Alloy steels 25 CrMo 4 25 CrMo 4 Alloy steels P3 P2 Medium and high carbon steels C45 C30 N+RZ N-RZ C45 C30 Medium and high carbon steels P2 P1 Free cutting and structural steel C25 St44-2 R-D R-D(Coating) OL+RZ HP+RZ HP-RZ C25 St44-2 Free cutting and structural steel P1 Vc(m/min) 5m/min 10m/min 15m/min 20m/min 25m/min 30m/min An image telling possible applications 38

40 NEW CODE OLD CODE M MF UNC/UNF GENERAL PURPOSE R-D 9353 M2~ R-D 9353TI SPECIAL PURPOSE N+RZ 9351OX N-RZ 9351OX OL+RZ 1355TC HIGH PERFORMANCE HP+RZ 1356TC HP-RZ 1 56TC MHRZ Coating Coating Coating Coating Coating Please refer to Yamawa general catalogue page M2~ M2~6 170 M8~ MF2~ No. 0~1/2 283 M3~6 171 No. 2~1/4 290 M2~6 for a complete view on sizes, tolerances and chamfers available 172 M8~ MF10~ No. 0~1/2 292 M6~ MF10~ FORMING TAPS CUTTING TAPS ISO N ISO P - ISO M ISO H ISO S ISO N ISO K ISO M ISO P TECHNICAL INFORMATION G 1/8~3/ /8~3/8 166 indicates the missing number to complete the old code as follows: 3=371/376 M 8=374 MF 39

41 ISO N Non ferrous materials Low Tapping speed High ISO Identification numbers Materials Vc(m/min) 5m/min 10m/min 15m/min 20m/min 25m/min 30m/min 50m/min Area of full rigid lead feed Materials ISO Identification numbers N1 Aluminum alloy (<12% Si) R-D (Coating) Aluminum alloy (<12% Si) N1 N2 Aluminum alloy (>12% Si) HP+RZ HP-RZ Aluminum alloy (>12% Si) N2 N3 Copper N+RS N-RS Copper N3 Vc(m/min) 5m/min 10m/min 15m/min 20m/min 25m/min 30m/min 50m/min An image telling possible applications 40

42 NEW CODE OLD CODE M MF UNC/UNF GENERAL PURPOSE R-D 9353TI SPECIAL PURPOSE N+RS 9350NI N-RS 9350NI HIGH PERFORMANCE HP+RZ 1356TC HP-RZ 1 56TC Coating NI NI Coating Coating M2~ Please refer to Yamawa general catalogue page M2~6 169 M8~ MF2~ No. 0~1/2 287 M2~6 172 M8~ MF10~ No. 0~1/2 292 for a complete view on sizes, tolerances and chamfers available FORMING TAPS CUTTING TAPS ISO N ISO P - ISO M ISO H ISO S ISO N ISO K ISO M ISO P TECHNICAL INFORMATION G 1/8~3/8 166 STI (EG) M 3~ indicates the missing number to complete the old code as follows: 3=371/376 M 8=374 MF 41

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44 TECHNICAL INFORMATION 1. Terminology of Taps p Flutes p Edge angle and Cutting allowance of taps p Recommended Tapping Speeds p Bored hole size before tapping (for thread cutting) p Bored hole size before tapping (for thread forming) p Materials used for Cutting Tools p Surface Treatment p Carbide Taps p Selecting different tap holder combinations by machine feed system p The mechanism for a tap to cut oversize on an internal thread p Symbols for Standard Threads p

45 1. Terminology of of Taps Flute Width of land Chamfer angle External center Core dia. Internal center Shank dia. Size of square Chamfer length Thread length Shank length Length of square Overall length Chamfer relief Thread relief and cutting angle Width of margin Chamfer relief Thread relief Heel Indicator drop for chamfer relief Indicator drop for thread relief Cutting face Cutting angle Edge angle, including chamfer relief, thread relief, cutting angle and others, as well as heat treatment, have important functions affecting workpiece shape, tool life, surface finish of internal screw thread, and so on. Chamfer of straight flute taps series F M V V(SP) M(3.5P) F(2P) Serial taps come in sets of three or two to complete screw threads by cutting work materials in incremental steps. The first tap (V) and the second tap (M) cut screw threads under size. Then, the third tap (F) completes the screw threads. Hand tap Bottoming tap Plug tap Taper tap Taper tap Plug tap Bottoming tap threads threads threads In general, tap chamfer is the most important part of taps to create internal thread. The function of full thread part of taps is to make a guidance. 44

46 2. Flutes Flutes Major functions of flutes are: Major functions of flutes are : 1) Chips pocket, 2) lubricant supply route, 3) rake angle formation, 4) to determine cutting amount in relation to the number of 1) Chips' pocket, 2) lubricant supply route, 3) rake angle formation, 4) to determine cutting amount in relation to the number of chamfer threads. And chamfer threads. And all are very important. Taps flutes are classified into following groups by tapping methods, fluting method, all are very important. Taps' flutes are classified into following groups by tapping methods, fluting method, tapping direction, and hand of screw tapping thread. direction, and hand of screw thread. Flutes of tap Type of Flute Type of Taps Flute Straight Flute Cutting type Forming type Straight Spiral Left Hand Spiral Spiral point with oil groove without oil groove Hand tap Cutting type Spiral fluted tap for blind hole Spiral pointed tap Roll tap Roll tap Spiral fluted tap for through hole Type of Taps Flute With oil groove Forming type FORMING TAPS CUTTING TAPS ISO N ISO P - ISO M ISO H ISO S ISO N ISO K ISO M ISO P Spiral Flute TECHNICAL INFORMATION Spiral Point Flute Without oil groove In general, the number of flutes for cutting type taps are usually increased as O.D. becomes larger. However, it is also influenced by tap's strength and rigidity, In general, the number of flutes for cutting type taps are usually increased as O.D. becomes larger. However, it is also influenced the accomodation of chip, the amount of cutting, and lubricant supply system. by tap s strength and rigidity, the accomodation of chip, the amount of cutting, and lubricant supply system. 45

47 t 3. Edge angle and cutting allowance of taps Cutting angle and Chamfer relief angle θ: Cutting angle γ: Chamfer relief angle Chordal Hook Angle Rake Angle Tangential Hook Angle γ γ γ θ θ θ Cutting angle of hook face. The angle between the center line passing the cutting edge and the straight line linking the cutting edge with the thread root. Cutting angle of rake face. The angle between the center line passing the cutting edge and the straight line linking the cutting edge with thread root. Cutting angle of hook face. The angle between the center line passing the cutting edge and the straight line tangent to the rake face on the cutting edge. Thread relief S: Indicator drop for thread relief Concentric-unrelieved Con-eccentric thread relief Eccentric thread relief (A) (B) No relief exists at land. Start (A) and heel (B) of thread land have same concentricy. Radial relief in the thread form starts at the back of a concentric margin. Radial relief in the thread form starts at the cutting edge and continues to the heel. The amount of cut portion The amount of cut portion Please refer to the pictures shown. Please In refer such to the taps pictures as have shown. 4 flutes and 3 thread In such chamfer, taps as have the 4 cutting flutes and operation 3 thread chamfer, progresses the in cutting order operation from progresses the edge of in order A1, B1, from C1, the D1 A2, edge of B2 A1, B1, A4. C1, Tap D1 A2, end B2 A4. is usually Tap smaller end is usually than smaller the size of than the bored size of hole, bored and hole, A1 and may A1 not may make not make any any cutting cutting operation. Land A Land D Land A Land B Land C Land B t: Amount of cut portion per blade Land C Land D 46 Tapping direction Bored hole diameter

48 4. Recommended Tapping Speeds Recommended Tapping Speeds Tapping Speeds Tapping Speeds Following usage conditions affect tapping speeds: kind of taps, workpieces, number of chamfered threads, materials, hole condition Following usage and fluid. conditions It is necessary affect tapping to select speeds the : kind suitable of taps, tapping workpieces, speed number by paying of chamfered attention threads, to these materials, conditions. hole condition and fluid. It is necessary to select the suitable tapping speed by paying attention to these conditions. When work material has excellent workability, when there is a little depth of tapping, or when tapping fluid can be sufficient, When work material has excellent workability, when there is a little depth of tapping, or when tapping fluid can be sufficient, select rather higher select tapping rather speed. higher When workability tapping of speed. work material When workability is unknown, to of be work safe, material try nearly is the unknown, lowest tapping to be speed safe, at try first, nearly and then the increase lowest the tapping speed speed gradually. at first, and then increase the speed gradually. * Following speed speed is basically is basically for the for cutting the cutting condition condition under the under use of the insoluble use of cutting insoluble oil. Under cutting the oil. use Under of water the soluble use of cutting water oil, soluble please choose 30% slower speed. cutting oil, please choose 30% slower speed. Low Carbon Steels Medium Carbon Steels High Carbon Steels Alloy Steels Thermal refined steels Stainless Steels Tool Steels Cast Steels Cast Irons Ductile Cast Irons Coppers Brass Brass Casting Phosphor Bronze Phosphor Bronze Casting Wrought Aluminum Aluminum Alloy Castings Magnesium Alloy Castings Zinc Alloy Diecastings Thermosetting Plastic Workpiece Materials Bakelite (Phenol-PF) Tapping Speed unit: m/min Spiral Fluted Spiral Pointed Roll Taps Straight Fluted Cemented Carbide FORMING TAPS CUTTING TAPS ISO N ISO P - ISO M ISO H ISO S ISO N ISO K ISO M ISO P Thermoplastic resin Titanium Alloys Nickel Base Alloys Formulas PVC, Nylon Ti-6AI-4V etc Hastelloy, Inconel, Waspaloy TECHNICAL INFORMATION Tapping Speed (Vc) Revolution of tap (n) n : Revolution of tap (min -1 ) : 3.14 Dc : Nominal dia. of tap (mm) Vc : Tapping Speed (m/min) Dc : Nominal dia. of tap (mm) :

49 5. Bored Bored hole hole size size before before tapping tapping (for (for thread thread cutting) for for Metric Metric Threads Threads Minor diameter of internal threads (D 1 ) Bored hole size Minor diameter of internal threads (D 1 ) Size Max. (ref.) Size Min. Max. Min. Unit unit: : mm Bored hole size (ref.) * * * * * * * * * * * * The recommended tap tap drill drill sizes sizes indicated above above are are for for 6H Metric 6H (Class Threads. 2) Metric Threads. DD1: 1 : Minor diameter of of 6H internal 6H (Class thread. 2) internal The Minor thread. diameters The Minor D 1 shown diameters in ( ) are D1 of shown 5H for in coarse ( ) are threads of 5H (Class and of 2) 4H for coarse 5H for fine threads threads. and of 4H 5H (Class 1) for fine threads. * Marked sizes have been eliminated from. 48

50 Bored Bored hole hole size size before tapping (for thread cutting) Size Minor diameter of internal threads (D 1 ) Bored hole size Minor diameter of internal threads (D 1 ) (ref.) Size Max. Min. Max. Min Unit unit: : mm Bored hole size (ref.) FORMING TAPS CUTTING TAPS ISO N ISO P - ISO M ISO H ISO S ISO N ISO K ISO M ISO P TECHNICAL INFORMATION D1: 1 : Minor diameter of of 6H internal 6H (Class thread. 2) internal thread. 49

51 Bored hole size before tapping (for thread cutting) for Metric Threads unit: mm Size Minor diameter of internal threads (D 1 ) Max. Min. Bored hole size (ref.) Size Minor diameter of internal threads (D 1 ) Max. Min. Bored hole size (ref.) M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M D 1 : Minor diameter of 6H internal thread. 50