The Turning Dilema - RPMs vs Risk (semi-long)

Aug 17, 2005 24 Replies

I think it was John Jordan that said "If you think a piece is turning fast, then it is too fast!"

Because of reaction time, faster can be better - less time for you to drive your tool into a position to cause a catastrophic catch. But keep your turning to a comfortable speed - that speed will go up over time as you gain more confidence.

Corollary to the last, before you turn on the lathe, get the tool away from the work, then approach the tool rest FIRST, then the turning wood.

Pounding the pulpit in news: snipped-for-privacy@accesscom.com, charlie b did expound thusly:

Here's where your Mr. Spock part must be otherwise occupied. Do Vulcan's take smoko's?

In the World Of Norm, if you take too big a bite you risk biting the hand that... so naturally you slow down the feed rate.

In the World of Turning it's exactly the same, except you've only got one tooth and it's not moving. It's not making *any* bites per second; you could say it's making one continuous bite. At low RPM your feeding less feet per minute to that single tooth than you would at high at high RPM. If it's biting the hand, slow down the feed rate by dropping the RPM!

No, what's really happening is the Mr Spock part has shown he really does have a human side and logic based on faulty premises is dangerous to your enterprise while Scottie, down in the bowels of the ship, is screaming "She cannae take much more ae this! Get a new Science Officer!"

Do you mean PLUM ? ? ?

I think he was giving it to us straight up - no juicy stuff here -- course it will pass.

120 tool - haven't got one. My coarsest tool is 220. ;)

I have tried to get the spiral intentionally, but with a 500 RPM lowest speed it's a toughie.

maybe it was a very straight tree?

mac

Please remove splinters before emailing

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required