herb
spending too much on rocks
Member since November 2011
Posts: 444
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Post by herb on Nov 10, 2013 17:49:20 GMT -5
Hi all, Not exactly a home made equipment question, but this seemed the best place to ask! I am trying to find a source for a replacement bearing for my vintage Lortone SA-8 grinder. Here is what the current one looks like: Front: Back: Side: And this shot shows the retaining ring that covers the bearing and the bearing itself: The bearing is stamped SKF Canada 478204-012 I've searched for that part number a bit, but the hits I've found don't ever seem to show a picture of what the item is. I'm guessing it is just the bearing since the old Lortone manuals show the cap as a separate item. If the cap (and the rubber washer on the back) are separate items, how does one get the bearing out of the cap? I tried pushing it out but it doesn't budge. Do I need to remove the rubber washer on the back? I don't see anything that looks like a locking ring, but I am not real familiar with the details of bearings. Any help or advice on where to find a replacement is appreciated!
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Post by jakesrocks on Nov 10, 2013 20:24:56 GMT -5
Any good machine shop will have an interchangeable bearings book. Take your bearing with you and they will match the numbers on your bearing to several replacement bearings by different companies.Try to buy a good American made bearing if one is available.
The rubber washer is a grease seal, built right into the bearing. Don't remove it. The bearing will probably have to be pressed out of the metal housing,and the new bearing pressed in. Again,a machine shop will have the proper press to do the job.
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milto
starting to spend too much on rocks
Member since January 2010
Posts: 162
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Post by milto on Nov 10, 2013 20:40:48 GMT -5
The rubber is a shock absorber and you can order them with new rubber or without.You should be able to push the bearing out of the rubber by hand (NEEDS SOME STRENGTH). Very simple to do, I.m not at my other computer right now but will post the site where you can buy these very reasonable and last long.Will send a little later.Any questions contact me on email. This is a simple hand job definitely do not need any shop.
Milto
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milto
starting to spend too much on rocks
Member since January 2010
Posts: 162
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Post by milto on Nov 10, 2013 21:24:57 GMT -5
Here is the web site www.thebigbearingstore.com/servlet/the-301/SA204-dsh-12-3-fdsh-4%22-Insert-Bearing/DetailThey run $6-$7.You do not need a new rubber they last forever,you want the prelube. Sometime it is easier to push rubber and bearing out togather.Try not to bend or mutilate the thin bearing holder. after you have the assy back togather and before you mount wheels take your rubber or leather mallet and gently hit both sides of the shaft.This shaft sort of floats in the rubber mounts and this will help getting to run them true. Good luck, it really is pretty simple after doing it several times, I have 4 of these that run alot and do bearings every several years or as needed. milto
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herb
spending too much on rocks
Member since November 2011
Posts: 444
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Post by herb on Nov 11, 2013 8:30:11 GMT -5
Thanks for all the replies! Glad to see that the bearings are cheap! I did try pushing the bearing out of the cup but it does not look like it wants to move at all, so I will probably have to look for a machine shop around here to pop it out.
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herb
spending too much on rocks
Member since November 2011
Posts: 444
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Post by herb on Nov 11, 2013 20:43:50 GMT -5
I'm replying to my own message!
After looking a little more carefully at the bearing assembly, I was able to pop the bearing out of the housing. I put the black retaining ring and the bearing assembly in a bench vise with two small pieces of wood just on either side of the rubber ring at the back and slowly tighten the vise. The bearing popped out quite easily that way. It went so easily, that I am surprised that I was not able to do it by hand when I tried the other day. Next, I removed the rubber shock absorber by just peeling it back starting from the back side. It took a little work, but once you get part of the rubber to the bearing's edge, the bearing pops right out of the rubber.
I had also contacted Lortone to see if they carried the part and/or how to remove the bearing from the assembly. They replied that it is usually easier to just replace the whole assembly. Obviously, now that I've figured out how to dismantle it, I will only need the bearing itself, but here are the part numbers if anyone is intereted:
Bearing hat p/n 063-008, $4.50 Bearing, p/n 200-001 $12.95 (specs on the bearing are: JIB ¾” SA204-12) Bearing isolator, p/n 240-069, $6.90
I could only find the bearing isolator in their online catalog. They probably only list parts for relatively new products in their catalog.
They also recommended replacing both bearings instead of just one, which is probably not a bad idea.
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Post by johnjsgems on Nov 20, 2013 20:49:18 GMT -5
Replace the belt too while you have it apart.
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Post by rocklicker on Feb 26, 2014 19:27:35 GMT -5
I had to replace the exact same thing a while back. I ended up taking it apart and going down to the local bearing supply for a replacement. Steve
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