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Forum topic by Jim posted 482 days ago 1010 views 0 times favorited 9 replies Add to Favorites Watch
View Jim's profile


9 posts in 483 days

482 days ago

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


14 posts in 509 days

#1 posted 482 days ago

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


9 posts in 483 days

#2 posted 482 days ago

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


1105 posts in 1867 days

#3 posted 482 days ago

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 and the wall gets in the way.. - Mike -

View Loren's profile


7385 posts in 2271 days

#4 posted 482 days ago

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 770 days

#5 posted 482 days ago

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


9 posts in 483 days

#6 posted 481 days ago

That’s a great point, thanks!

-- Jim

View Jim's profile


9 posts in 483 days

#7 posted 478 days ago

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


982 posts in 758 days

#8 posted 478 days ago

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


9 posts in 483 days

#9 posted 472 days ago

Thanks! I will check them out.


-- Jim

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