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Forum topic by Jim posted 04-24-2013 08:42 AM 1590 views 0 times favorited 9 replies Add to Favorites Watch
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14 posts in 949 days

04-24-2013 08:42 AM

Topic tags/keywords: powermatic 90 oneway turning

I am brand new to woodturning and I recently purchased a Powermatic 90 off of Craigslist. The guy I bought it off of didn’t know much about this lathe. I am trying to figure out how to install a Oneway chuck. I can’t figure out how to get off the drive center. I’m not even sure if that is the correct name for it! I have a lot of learning to do. Any help n this subject would be very much appreciated. Thanks!

-- Jim

9 replies so far

View dlong0's profile


15 posts in 975 days

#1 posted 04-24-2013 09:26 AM

You will need to have a long dowel(12”) or something like that(they are called knockout bars). The spindle shaft(what the drive spur is held in) is hollow all the way through the headstock. Put the dowel(knockout bar) in the hole on the other side and gently tap it with a mallet or hammer. The drive spur will come right out then.

-- dlong0

View Jim's profile


14 posts in 949 days

#2 posted 04-24-2013 02:49 PM

Thanks so much! I thought that was the way to do it but i started that and made a few taps and nothing. So, I thought i better make sure before I break anything. I will get the parts and make a breakout bar this week :-)

-- Jim

View WhoMe's profile


1223 posts in 2333 days

#3 posted 04-24-2013 03:09 PM

If it is stuck bad, you might want to put something on /around/below that live center to catch it when it finally comes lose.

-- I'm not clumsy.. It's just the floor hates me, the tables and chairs are bullies, the wall gets in the way AAANNNDDD table saws BITE my fingers!!!.. - Mike -

View Loren's profile


7967 posts in 2738 days

#4 posted 04-24-2013 04:47 PM

I use a metal rod. I have not found wood dowels to be
adequate to the task. Sometimes the bar needs a real
solid whack with a hammer, not a mallet.


View Kreegan's profile


1452 posts in 1237 days

#5 posted 04-24-2013 05:52 PM

Make sure to put your hand around the center to catch it when it pops out. Otherwise the point could get smushed like mine did. Some 3/8” all thread should work for a knockout bar.

View Jim's profile


14 posts in 949 days

#6 posted 04-25-2013 03:33 PM

That’s a great point, thanks!

-- Jim

View Jim's profile


14 posts in 949 days

#7 posted 04-28-2013 08:38 AM

That worked great ! Got it off with a 3/8” rod and a few wacks with a hammer :-)
Now, my next dilemma is what do I need to mount my Oneway Stronghold chuck to the Powermatic? I assume I need an adaptor shaft of some sort? Where do I get one?

Thanks for any help on his matter.

-- Jim

View Wildwood's profile


1627 posts in 1225 days

#8 posted 04-28-2013 11:27 AM

Might check with Craft Supplies or Packard Woodworks for a threaded adapter for your chuck & lathe both sell OneWay chucks. Both vendors very helpful and have free catalogs too!

-- Bill

View Jim's profile


14 posts in 949 days

#9 posted 05-04-2013 02:48 PM

Thanks! I will check them out.


-- Jim

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