Guide lines for cutting speeds, cutting fluids and rake angels

Die designations

Material machinedCutting speed guide lines m/minCutting fluidRake angelDie designations
General engineering steelsSt 37-2, St 50-2 etc.8-12Cutting oil17-22°(HSS)
Free-cutting steels9 S Mn 28, 9 S MnPb 28 etc.10-14Cutting oil17-22°(HSS)
Case hardening steelsC 15, Ck 15, 16MnCr5 etc.6-10Cutting oil, special cutting oil17-22°HSS besch, VA, VA besch, LL, LL besch, (HSS-nitr.)
Heat-treatable steelsC 35 Pb, C 45 etc.5-8Cutting oil, special cutting oil13-18°HSS coated, VA, VA coated, LL, LL coated, (HSS-nitr.)
Stainless steelsX 12 CrMoS 17,X 12 CrNiS 188 etc.4-6Special cutting oil13-18°HSS coated, VA, VA coated, LL, LL coated, (HSS-nitr.)
Grey cast ironGG 15, GG255-8Cutting oil, paraffin8-12°GG-HSS-nitr.
Brass giving short chipsCuZn 39 Pb 2, CuZn 40 Pb220-30Cutting oil3-7°MS, MS coated
Brass giving long chipsCuZn 20, CuZn 3712-18Cutting oil12-18°MS
BronzeCuSn 85-8Cutting oil, soluble oil8-12°BZ
Gun metalG-CuSn 5 Zn Pb7-11Cutting oil, soluble oil8-12°RG-Hß-nitr.
CopperE-Cu 57, SF-Cu11-15Cutting oil, soluble oil23-28°CU
Al. alloys giving long chipsAlCuMg1,AlMg3 Si15-25Special cutting oil, paraffin23-28°ALU
Al. alloys giving short chipsGD-AlSi 8 Cu 3, GD AlSi 128-12Special cutting oil, paraffin13-18°VA
Pure titaniumASTMS 67, hardness grade 25- 8Special cutting oil19-24°VA,VA coated,LL,LL coated