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Harold Hall's precision grinding table
wheeltapper:
Yea, slow and steady wins the race.
I always countersink using the mill, I can control the downfeed better than a drill press.
Roy
xo18thfa:
Slooow speeds on the countersink and oil. I've also found that doing the countersink cut first with a very small pilot hole reduces chatter.
It is good to ask questions like these and get several answers.
wongster:
Thanks John, Roy, and Bob. This will give me the courage to ask another "how to use..." question on using slitting saw. Will ask in the right thread.
Bob, you mentioned a pilot hole before countersink. I did the hole first and then apply the countersink to it. Hope I didn't do anything wrong.
Regards,
Wong
Bluechip:
Hi Wong
See if you can get c/sinks similar to these:
http://www.axminster.co.uk/axminster-axminster-chatter-free-countersink-prod21819/
As others have said, fine feed, low speed & oil. Although I use Rocol RTD fluid on steel.
Despite what they say, it is possible to make them chatter a bit on stainless, but you have to really abuse them to do it.
Under normal use, they don't chatter at all.
The swarf comes out as a very thin ribbon, which can be very sharp if stainless .. :( verified by experiment ... :palm:
Dave BC
wongster:
Hi Dave,
Thanks. I don't understand what the 3 sizes mean. The max shank size my spindle can take is 10mm.
Regards,
Wong
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