Large round mounting

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Forum topic by SWC15 posted 05-30-2015 05:27 PM 893 views 0 times favorited 7 replies Add to Favorites Watch
View SWC15's profile


2 posts in 1118 days

05-30-2015 05:27 PM

Fairly new to wood turning, not new to woodworking. I have used a Craftsman lathe handed down from great uncle. It turned and that’s all I can say about that. But I just stepped up and bought a 3520b ( wow, what a lathe) to expand my custom wood business.

I have a customer that wants a large white pine table turned. It’s 30” x 3-1/2 thick end grain cut. It is completely dry with no checks at all. Surprising. My question is how would you mount/chuck this to turn flat off the end of the lathe?
I have the 18” extension mounted low. I want to keep it rustic but flat. Any suggestions. Thank you for your time.


7 replies so far

View jerryminer's profile


928 posts in 1467 days

#1 posted 05-30-2015 06:47 PM

I’m not sure this is really a turning project, at least for a lathe that size—Do you really want to turn something that out-weighs the lathe??

Maybe flatten with a router sled? Wide-belt sander?

-- Jerry, making sawdust professionally since 1976

View HerbC's profile


1764 posts in 2885 days

#2 posted 05-30-2015 07:12 PM

I would use a router sled.

The large round (better known as a “cookie”) may not be visibly cracked yet but the stresses of rotating on a lathe, no matter how slow you go, would certainly tend to make it crack.

How long has the piece been drying? It is certainly unusual for it not to develop radial cracks yet and there is still a strong possibility it may do so as the piece adjusts to changes in moisture levels in different locations and seasons of the year.

Good Luck!

Be Careful!


-- Herb, Florida - Here's why I close most messages with "Be Careful!"

View SCOTSMAN's profile


5849 posts in 3611 days

#3 posted 05-30-2015 09:00 PM

Yes I wonder if you will regret such a beast in your shop.just please be careful and make sure you have invertor speed control for such big projects .
I nearly lost my thumb when I turned a bowl about eight to ten inches with very slightly cracked wood.I did fine and then when I was sanding it and then bang like a gun it exploded leaving half of the bowl turning at a bout 20.000 rpm and guess what it came down full force and damaged my hand something awful I was ten days in hospital and a surgeon had to piece all the bits back have very safe fun. My advice for big objects is simply just keep the speed way down. Alistair

-- excuse my typing as I have a form of parkinsons disease

View JoeinGa's profile


7736 posts in 2033 days

#4 posted 05-30-2015 09:17 PM

Here ya go …. . There’s a story on the Internet where they used a tractor as a lathe to turn a HUGE bowl!

and WELCOME to LumberJocks! :-)

-- Perform A Random Act Of Kindness Today ... Pay It Forward

View SWC15's profile


2 posts in 1118 days

#5 posted 05-31-2015 10:40 AM

Sounds like you guys would steer clear of it. I was just thinking it would be a fair test of the PM, seams hd enough. The round doesn’t weigh maybe 25#. Since it is a customer supplied round I might go the boring route. If it were my round, I would belt sand the bottom relatively flat then attaching a 12-15” BB ply circle to the faceplate screwed to the bottom. Thanks for suggestions

View Nubsnstubs's profile


1298 posts in 1756 days

#6 posted 05-31-2015 01:02 PM

Jason, do you have enough swing on the extension to mount your tailstock??? If so, problem mounting it is solved. Contact me at for pictures of what I would use. Before you start turning it, if you know someone with a banding machine, have them band to od so if you do have cracks, it will at least stay together until you remove the banding. ............ Jerry (in Tucson)

-- Jerry (in Tucson)

View Arlin Eastman's profile

Arlin Eastman

4232 posts in 2587 days

#7 posted 05-31-2015 07:51 PM

First I would get a face plate that is at least 8”. Then it will be very easy for you to turn on the 18” extension. I have the same lathe as you and it can handle more then that for weight or size which will go up to 38” swing.

The most important is the face plate and its size to eliminate vibration that will happen if you use to small of a face plate.

Good luck on your turning and can not wait to see how it looks when done.

O and when you do turn it you should not go more then 200 to 400 rpm since the outside of the table will be flying compared to the inner part.

-- It is always the right time, to do the right thing.

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