OK, I know that what I have is entry level stuff. It's a cheap-o
Clarke. With twist drill bits it isn't bad but with Forstner bits its
ridiculous. I see Norm drilling 1" holes though 3" stock in 5 seconds
and shavings are flying all over the place. It takes me like like 2 or
3 minutes to get through 1/2" ply and instead of shavings I get powder
and smoke from the gole and if I press down too hard the whole thing
stalls. The belt is ok (tight and not slipping) and the bits are new
and sharp so I assume the unit has just too little power. But what's
the guideline for power: top RPMs or wattage?
First, new doesn't necessarily equal sharp.
RPM are meaningless if it doesn't have torque to accompany it (Dremels
spin at 10000+ RPMS) Wattage is a better indicator, but motor
construction has a lot to do with it as well.
Your drill bit is worth less than what you paid for it. You absolutely
should be getting shavings not dust regardless of your motors power. Dust
always comes from a dull blade, bit, or knife. You want relative low rpm's,
500 to 700 range.
I've used Forstners up to 2 inches diameter on an import benchtop drill press.
It takes patience, but it can be done. Powder instead of shavings makes me
think your bits aren't sharp. Also, keep the spindel speed down, around 500
RPM seems right for the larger bits.
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