Bearing replacement on Powermatic jointer?

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Forum topic by rszimm posted 01-26-2016 04:52 PM 749 views 0 times favorited 3 replies Add to Favorites Watch
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1 post in 1306 days

01-26-2016 04:52 PM

Topic tags/keywords: jointer

Picked up a Powermatic 6” model 53 jointer and Ive stripped it for a full rebuild. I’m wondering how you tell if the cutter head bearings need replacement. They seem to spin just fine without any odd sounds or roughness, but figured I’d ask if there’s a rule of thumb.

3 replies so far

View TheFridge's profile


10859 posts in 1940 days

#1 posted 01-26-2016 04:59 PM

Rule of thumb for me is: if you have it apart and you don’t know they’re new then replace. If the previous owner said he just replaced them I’d make sure they’re not the cheapest. If they are I’d replace. Cheap and easy with a bearing puller and a piece of copper pipe slightly larger than the shaft. Steel pipe will work too as long as you don’t booger up the shaft.

-- Shooting down the walls of heartache. Bang bang. I am. The warrior.

View MrUnix's profile


7450 posts in 2653 days

#2 posted 01-26-2016 05:09 PM

That’s easy!

Short answer:
Replace them now while you have it apart, regardless of what condition you think they are in.

Long answer:
You have no idea how much use/abuse those bearings have seen over their life, and it is very difficult to determine the condition of a bearing without pulling the seals and looking. At that point, you may be able to clean them up and re-pack, but they are still a used bearing… it’s easier to just replace them and know they are good rather than hope they are. You already have the machine apart, so now is the best time to do it… not later on down the road when you discover the bearings you thought were good turned out to not be. Think of it as cheap insurance (maybe $10 for a pair of quality bearings).


-- Brad in FL - In Dog I trust... everything else is questionable

View TheGreatJon's profile


348 posts in 1687 days

#3 posted 01-26-2016 05:24 PM

^ what they said.

If you weren’t going to pull it apart for any other reason, then you could wait and see if there are any odd noises, vibration, or if the bearings get hot after running for a few minutes. However, you already have it apart. Just go for it.

-- This is not the signature line you are looking for.

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