Thread: Bench grinder bearings

Well if it's almost siezed up anyway, what's the harm in pulling it apart? You might find they're common bearings like alternator bearings (6000 series, etc.).

Once you pull it apart have a look at the shaft where the bearing was located on also the end sheilds of the housing.

If there is wear on either of these parts it is not worth fixing.

As Yonnee said they should be standard bearings so a cheap fix if the rest is ok.

At one stage some of the cheapie 6in units ran on bronze bushes. Not enough use and regular strip to clean and oil, and the shafts get rusty and start to drag.
Possible to clean thm up and get them going but hardly worth it.

Worth pulling it apart to have a look anyway.

Thanks guys.

Hi, the grinder I use for sharpening tools is also a cheapie that I originally bought as my main grinder but I replaced when a mate gave me an old GMF grinder that is strong as a mule.

The bearings on the cheapie had also got very noisy and eventually siezed up. I pulled it apart and the bearings were standard sizes. I replaced them and all has been OK since.

Well, I pulled it apart. Seems to be quite well made actually, I was surprised.
Brand is a Peerless, using 6203Z bearings, so shouldn't be too difficult to track down a couple.

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Brand is a Peerless, using 6203Z bearings, so shouldn't be too difficult to track down a couple

Yeah,should set you back all of $10 or so consider ZZ as opposed to Z as what you have now. Single Z is metal shield one side and they would be Chinese, what you buy should not be and with the double shielding no dust will get in and they should latt a very long time

Ah, thanks - I knew the Z code meant sealed on one side, but not what the code was for sealed both sides. 6203ZZ it is! I figure I can afford the extra dollar or so for it

Well, pulled it to bits, scared up some bearings (sealed both sides, but 2 for $22! ) and managed to install them. Good news and bad news of course. Good news is that it spins nicely now and is quieter than I remember it being. Bad news is that the end housings that have the through-bolt holes at unequal intervals around the circumference can in fact be installed 180 degrees out. This means it goes together and can be tested, but the wheel guards can't be fitted unless I want them upside down. Oh well, now I know for the next time I never pull the thing apart.
Anyhoo, now I get to pull it apart again and put it together properly. Once that's done though, I effectively have a new grinder for $22. Bargain! I'll be able to sharpen some sadly neglected drill bits now.