G’day All- Santa brought me a nice Foredom H15 Hammer Handpiece for
Christmas. Nice tool, fun to play with. However, the manufacturer
recommends it is to be used only at speeds of 5,000 rpm or less. The
Foredom motor I have is the jeweler standard model with variable
speed up to 20,000 rpm. To keep the speed down when using the hammer
handpiece, I put a piece of cardboard or wood under the foot pedal
so the pedal can’t be fully depressed and the motor runs more slowly.
However, I have no real idea if I am within the 5,000 rpm
recommended speed so that the handpiece does not overheat and come to
an early demise. Any ideas how to estimate speed in rpm or other ways
to keep speed down when using the hammer handpiece without the
expense of buying a low speed Foredom motor?