When drilling metals, excess heat is avoided by staying below a recommended linear cutting speed.?
A 3.0-mm-diameter hole and a 25-mm-diameter hole need to be drilled. At what maximum number of revolutions per minute can the drill bit rotate so that a point on its perimeter does not exceed the material’s linear cutting speed limit of 3.0 m/s?
Answers
Bob
Yes, and you may cool the cutter with water or slurry.
Maybe it's just me
I avoid excess heat with proper bit for the material being cut, bit being in sharp condition. of course run it at the right speed. v=r x omega just get your angular velocity in radians/sec
lee26loo，異域秦後人
THIS IS NOT A QUESTION .
JosephV
While cutting a metal rod, the abrasive surface wears away while cutting the metal. There is a shower of sparks and the metals burns away without a problem. While drilling metal, the heat generated is not high enough to cause any worries. If there is a problem of heating, then precautions are taken. These drill bits are made of HSS steel with 5% cobalt, and is cooled while drilling using special drilling oil.
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