GENERAL TECHNICAL INFORMATION THREAD HELIX ANGLE AND ANVIL SELECTION Pitch TPi mm 2.5 10 Use AE anvils for EX-RH and 9 Special holder required ACME IN-LH tool holders and AI anvils 3 8 AE or Al+4,5° STUB ACME for IN-RH and EX-LH tool holdersTRAPEZ (DIN 103) 3.5 7 AE or Al+3,5° ROUND (DIN 405) 4 6 AE or Al+2,5° 5 5 Standard anvil ( Supplied with tool holder) 6 4 3.5 8 3 1,5° 10 2.5 12 2 AE or Al+0,5° Tool holder 16 1.5 5 10 20 30 40 50 60 70 80 mm Diameter Pitch TPi mm 2.5 10 Use AE anvils for EX-RH and 9 Special holder required PARTIAL PROFILE 60° IN-LH tool holders and AI anvils 3 8 AE or Al+4,5° PARTIAL PROFILE 55° for IN-RH and EX-LH tool holders 3.5 7 ISO, UN, WHT, NPT, BAPTAE or Al+3,5° 4 6 AE or Al+2,5° 5 5 6 4 3.5 8 3 Standard anvil ( Supplied with tool holder) 10 2.5 12 2 16 1.5 5 10 20 30 40 50 60 70 80 mm Diameter Pitch TPi mm 2.5 10 Use AE anvils for EX-RH and 9 Special holder required AMERICAN BUTTRESS IN-LH tool holders and AI anvils 3 8 SAGE for IN-RH and EX-LH tool holdersAE or Al+3,5°(DIN-513) 3.5 7 4 6 Standard anvil ( Supplied with tool holder) 5 5 Replacing the standard anvil 6 4 =3,74 with a negative angle anvil 3.583 Change to negative anvil AE or Al-1,5° will eliminate side rubbing 10 2.5122 =1,5°Tool holder 16 1.5 5 10 20 30 40 50 60 70 80 mm Diameter / Diamètre 1262