Transcription of Cutting rate recommendations for cut taps - …
1 137 TechnicalCutting rate recommendations for cut taps-ATERIAL GROUP!PPROXIMATE2C !PPROXIMATE("Recommended SFMHSS-EHSS-E-PMSolid carbidebright finishhard coatedbright finishhard coatedbright finishhard coatedStructural steels, free- Cutting steels 30-5040-7050-7055-95--Unalloyed case hardened steels 20-4030-7040-6540-80--Unalloyed heat-treatable steels<25 15-3525-5030-6035-75--Structural steels, free- Cutting steels<20 40-5040-7540-6540-80--Case hardened steels, heat-treatable steels<25 30-4530-6530-6035-75--Nitriding steels, spheroidal graphite iron<30 20-3030-5530-5035-65--<35 15-2520-3525-4530-60--<38 10-2520-4020-4530-55--Stainless- and acid-resistant steels.)
2 Sulphured 25-3540-5530-5535-70-- austenitic 20-3030-4030-5035-60-- martensitic 20-3025-4025-4530-50-- 10-2020-3020-3525-50--Alloyed case hardened steels 10-2030-4030-5035-70--Alloyed heat-treatable steels 25-3530-5025-4535-65--Alloyed tool steels<35 15-3020-4020-4530-60--High speed tool steels<38 8-1510-3015-3525-55--<44 --4-108-154-88-16 ---4-103-66-12 Cast iron 50-7060-9055-8565-11070-10080-130 Spheroidal graphite iron<25 30-5045-8540-7060-10070-10080-130 Malleable cast iron<35 15-3520-4025-4535-5560-11070-120 Aluminium and Al-alloysSILICON CONTENT WROUGHT AlUMINUM< 6%n/a30-5050-7550-7065-8080-14090-165Al cast alloys6-10%n/a25-3540-5040-6565-8080-14090-165>10%n/a-25-3540-6565-8060-13080-140 Al wrought alloys n/a30-8050-6565-100----n/a75-15035-6050- 65----Titanium and Ti-alloys140-275--12-2520-30--300-380--6 -1210-18--Nickel and Ni-alloys200-300--6-1210-18-->300--3-66- 12--Plastics15-30-20-40-30-60-Magnesium- alloys90-140---110-180-Brass.
3 Short-chipping30-45-45-60-80-100- long-chipping30-45-45-60-80-100.
