Replies

1. 
   hammer1 | Jun 13, 2011 05:34pm | #1

   Just curious why you think you need a new arbor? Which Unisaw, 10", right or left tilt, approximate age?

1. 
   lostcreek | Jun 14, 2011 09:27pm | #3

   Reason...

   Hammer,

   It's a right tilt, 10" platinum edition Unisaw. I purchased it used about 5 years ago. The bolt that holds the blade slipped while tightening a couple of days ago. The threads up to the blade are "rounded", but directly under the blade are fine. That's probebly why no "runout". The threads on the nut are also rounded. I was able to buy the new nut and am waiting for it to arrive...hopefully that will solve the problem, but who knows?

   lostcreek

1. 
   hammer1 | Jun 14, 2011 11:41pm | #4

   Lostcreek, when you put on the blade keeping nut, you only firm it up lightly, you don't tighten it hard. Unless your model saw is different than most others, the threaded portion of the arbor has coarse Acme threads. They are reverse threaded, so it's lefty tighty, not righty tighty. It would take a lot of force to gaul those up, maybe excess force used to attempt to loosen the nut going the wrong way. You shouldn't have to struggle with an arbor nut. Normally, the nut is softer than the shaft, so a new nut may be all you need. If not, a thick washer may move you off the bad threads.

   In changing a blade, first unplug the saw, don't ever trust a switch. Remove the throat plate, raise the blade, close the dust collector gate, engage the nut wrench so it's almost straight up, place a long scrap of wood flat on the table and in a tooth gullet to prevent the blade from turning, then pull the wrench toward you at the front of the saw. The nut should come loose easily and can be backed off by hand.

   To replace the blade, place it and the nut washer and push them tight to the arbor flange, finger tighten the nut firmly, engage the blade wrench and let it lay on the throat plate opening towards the front of the saw, then gently pinch the blade between your fingers and turn it towards you, this will firm up the nut in a quarter of a turn and is all you need.

1. 
   lostcreek | Jun 16, 2011 12:56am | #5

   OK,good tips.

   Hammer,

   Thanks for the ideas. I don't know the history of my saw except that it was replaced in a cabinet shop along with two others with Sawstops for insurance reasons. I think the damage was done there, as I don't think I overtighten. I will try your washer idea and I expect the new nut tomorrow in the mail. Thanks for the detailed instructions...they make sense and I'll follow them.

   lostcreek

1. 
   lostcreek | Jun 21, 2011 11:09am | #6

   It worked

   Hammer,

   I got lucky...the new nut did the trick. I did use your advice...thanks,

   lostcreek

2. 
   hammer1 | Jun 21, 2011 03:40pm | #7

   That's great, Lostcreek. A nut replacement is a lot easier than an arbor. Tune up your saw for alignment and start making some  sawdust!

2. 
   [email protected] | Jun 14, 2011 01:02pm | #2

   ebay sometimes

   They occaisionally show up on ebay as new old stock. 

3. 
   zionrestoration | Oct 11, 2011 10:11pm | #8

   unisaw arbor

   Lostcreek,

   If you decide that you are in the market for a new arbor, check http://www.renovoparts.com.  These guys manufacture obsolete parts for Delta and Powermatic.  They're awesome. High quality and made in the U.S.   Cheers.