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Curved Tool rests?

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Curved Tool rests?

#1

Curved Tool rests?

Mk

>Yesterday I was turning one of the largest bowl I have ever done. It was about 11" in diameter. Everthing went very well. However, when hollowing out the inside, the close and closer I got to the edge, I would get vibration. Even if I put the tool rest close I still got it. But only on the walls of the bowl, not the bottom of it. I tried lighter cuts, but it still occured.

Could it be that my tool rest was still to far and I should invest in a curved tool rest?

Where do I find curved tool rests?

Thanks!

Re: Curved Tool rests?

#2

JL

Re: Curved Tool rests?

JL

>Which lathe? Highland Hardware has a number of them available.

Re: Curved Tool rests?

#3

Re: Curved Tool rests?

George Van in WI

>It sounds like you may be rubbing the bevel of the gouge on the bowl and causing the vibration as the rim flexes. Once this starts it keeps magnifying till you start a new cut without pressuring the bevel against the bowl and let the edge cut forward down the bowl toward the bottom. (Assuming side grain orientation)

Re: Curved Tool rests?

#4

Re: Curved Tool rests?

Mk

>Jet 1442. I will check Highland HW. Thanks.

Re: Curved Tool rests?

#5

Re: Curved Tool rests?

John Trant (Baltimore/DC area)

>It sounds like you were trying to get the entire wall of the bowl thin as a single unit. If you get the entire wall close to thin, the rim does not have the support to keep from vibrating and potentially shattering. This problem gets more evident as the bowls get larger in diameter.

What you should do (even if the wood is kiln dried) is to get the outside shaped and sanded and then hollowed out the interior of the bowl but leave the walls quite thick. Then, working for the rim, get the walls thin in steps of about an inch at a time. After you have progressed 2 or 3 inches into the bowl, do not go back to the rim to touch up an area. Almost certainly, the rim will have warped sufficiently to cause a problem. Even if there is absolutely no wood movement, a thin wall will not have the structural support to permit a smooth cut.

John

Re: Curved Tool rests?

#6

second that opinion

tek-Brunswick, Ohio

>

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