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who to calcation tapping machine speed?
i now in one company working so i got problem my company got two milling machine this machine can milling,tap,drill. this machine user the fanuc control .matarial coper diameter is 1.67 tap is m1*0.25 drill is 0.9 so i progarmming ok i put center drill rpm is S6000 ,drill rpm is S4000 and tap rigid function rpm is S3000 pls u can help me calcation spindle speed and feed .....thank
Tapping feed rate depends on the spindle speed (rpm) and the pitch of the thread. For each rpm you want to advance the thread one full thread (i.e. one pitch).
In the case of a M1*0.25 thread, the pitch is 0.25mm. If you are rigid tapping at 3000rpm, then
3000 rpm * 0.25mm = 750 mm per minute feed rate.
I don't have my references available at the moment for a recommended spindle speed or feed rate for tapping copper. The other problem is that there are quite a few different copper alloys. Some machine much better than others. If you knew for sure which alloy and what hardness it was (i.e. half-hard, quarter-hard, annealed, or whatever), that would help too. Your tapping speed seems a little high, but most of my experience has been in English units with materials that machine easily and taps that break easily.
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