Guide lines for cutting speeds, cutting fluids and rake angels
Material machined | Cutting speed guide lines m/min | Cutting fluid | Rake angel | Die designations |
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General engineering steels | St 37-2, St 50-2 etc. | 8-12 | Cutting oil | 17-22° | (HSS) |
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Free-cutting steels | 9 S Mn 28, 9 S MnPb 28 etc. | 10-14 | Cutting oil | 17-22° | (HSS) |
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Case hardening steels | C 15, Ck 15, 16MnCr5 etc. | 6-10 | Cutting oil, special cutting oil | 17-22° | HSS besch, VA, VA besch, LL, LL besch, (HSS-nitr.) |
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Heat-treatable steels | C 35 Pb, C 45 etc. | 5-8 | Cutting oil, special cutting oil | 13-18° | HSS coated, VA, VA coated, LL, LL coated, (HSS-nitr.) |
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Stainless steels | X 12 CrMoS 17,X 12 CrNiS 188 etc. | 4-6 | Special cutting oil | 13-18° | HSS coated, VA, VA coated, LL, LL coated, (HSS-nitr.) |
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Grey cast iron | GG 15, GG25 | 5-8 | Cutting oil, paraffin | 8-12° | GG-HSS-nitr. |
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Brass giving short chips | CuZn 39 Pb 2, CuZn 40 Pb2 | 20-30 | Cutting oil | 3-7° | MS, MS coated |
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Brass giving long chips | CuZn 20, CuZn 37 | 12-18 | Cutting oil | 12-18° | MS |
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Bronze | CuSn 8 | 5-8 | Cutting oil, soluble oil | 8-12° | BZ |
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Gun metal | G-CuSn 5 Zn Pb | 7-11 | Cutting oil, soluble oil | 8-12° | RG-Hß-nitr. |
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Copper | E-Cu 57, SF-Cu | 11-15 | Cutting oil, soluble oil | 23-28° | CU |
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Al. alloys giving long chips | AlCuMg1,AlMg3 Si | 15-25 | Special cutting oil, paraffin | 23-28° | ALU |
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Al. alloys giving short chips | GD-AlSi 8 Cu 3, GD AlSi 12 | 8-12 | Special cutting oil, paraffin | 13-18° | VA |
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Pure titanium | ASTMS 67, hardness grade 2 | 5- 8 | Special cutting oil | 19-24° | VA,VA coated,LL,LL coated |
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