Richard Lorenz
Senior Member
Is there an undersized (inside opening) pilot bearing that I could use if I turn down a worn transmission shaft that fits in it? I have searched 3 catalogs and not found such a bearing.
Undersized Pilot Bearing
- Thread starter Richard Lorenz
- Start date
Why not replace the shaft?and use the proper bearing?I've never heard of it!!
J Franklin
Well-known member
Yes it has been done, a fellow had some made up and selling the set at a swap-meet. He said it had a metric ID. Check a bearing supply house
Doug in NJ
Well-known member
The correct bearing is easy to find. It is a mixed inch/metric size. I bought one a few years ago. Unfortunately I cannot remember any more details. :-(
Doug
Doug
RockHillWill
Well-known member
I had (50) of those bushings made to sleeve the input shaft. If you want to go that route, I could make some available.
Dave in MN
Well-known member
I have seen an internet thread about three years ago that confirmed the bearings were available. I can not remember where I saw it, but the thread gave the bearing numbers. Sorry I did not keep it.
Another thought....I have been faced with the same condition a couple times and the solution I have used is to weld the pilot surface and then turn the shaft back down to the correct diameter. The first one I completed was my own Pickup about 10 years ago. It has worked for me. I probably have about 12k miles on the pickup since doing this so I do not know about the long term durability of the weld vs the other suggested method.
I was able to weld and turn the shaft in less than 1/2 hour in my shop...and it did not cost me anything....
Good Day!
Dave in MN
Richard, I believe that the information posted below will answer your question. This is information I have gleaned from previous posts on Ford Barn. I have not used this bearing as I have the facilities to build up the shaft and turn it down to the original dimension, but I have no doubt that it will work. Don/WI
FlyWheel Pilot Bearing Info
Down the postings on Jan. 24 Chet asked about the pilot bearing with the reduced ID so you could just turn down the input shaft without welding-up or sleeving. As I mentioned below Terry Oberer posted years ago that Grainger had a "special" bearing with the original OD and a 5/8 inch ID. Finally found what I think is renumbered on the Grainger site, pg. 180, about the third from the bottom, item # 1L097 or 5U537 depending on shielding, etc. 40mm OD x 5/8 inch Id. About $12-13. Roger V
Look up the "Technically Speaking" vol 4 There is an article about this bearing made by NTN (6203ZZ/15.875/2A) with 40mm O.D. and 5/8' I.D. It is available here in Baltimore at Applied Industrial Technology. I also think I have found it at Tractor Supply (sku#11-99307). Both bearings are double sealed and should work.
bill Goddard
I think the ID should be the smaller size. There was a fellow I saw at one of the swapmeets that turned down the shaft to fit a bearing with a MM inside dia. and the outside was the same as the original pilot bearing. A slick fix! He sold the set-up ready to go.
Both dimensions originally were metric with the OD being 40mm. The "special" is the ID being the 5/8 inch instead of the original metric which was larger.
Terry Oberer posted "Special pilot bearing" July 25, 2005. He said Grainger carries a "203 Special" with the original OD but a 5/8 inch ID.
Sorry, I just don't remember the exact size, but I ordered it from the chart on this web page:
http://www.thebigbearingstore.com/servlet/Page?template=6200%20radial%20ball%20bearings
It's one of the bearings with a metric OD and inch ID. Check the sizes of your old bearing and it should be obvious which one is correct.
Grainger's has the bearing. I believe it is 40mm OD and 15.875mm (0.625 inches) ID. Turn the pilot end to 0.625 and install this bearing.
16mm = 0.630”
Last edited: