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Q: Hollow Chisel Mortiser - noisy bits in chisels?
Picked up the Delta MM300 for a hunnert bucks as part of Lowe's Delta
clearance. Never had one of these before. The bits "sing" pretty loudly as they spin in their chisels. Not so loud or not a screech that would signal a binding or a problem. But a louder "scraping" sound than I'd have expected. I know that's pretty subjective. But I finally saw a Woodworking at Home segment where he fires up his mortiser and I think mine are louder than his. Do they quiet down over time? Is it more a case of using the inexpensive Delta bits that ship with the machine? As an experiment, I varied the amount of bit exposed beyond the chisel from 0" to 1/4" (IIRC the manual says a 1/16 - 3/16" exposure) and didn't hear a difference. Also - the instructions are pretty vague about how much of the bit tip protrudes below the chisel corners. Again I think the manual says 1/16-3/16" "depending on the wood." Can someone lend some guidance on how they set up their hollow chisel mortisers? |
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