Pilot bearing fit

[Mart]

The pilot bearing is a standard metric bearing with a 17mm bore. The bearings will be sized to a very tight tolerance. If the input shaft does not slip in, as the input is new I would suspect it is not sized correctly. Do you have another shaft you could try the bearing on? Or do you have a means of measuring the shaft accurately?

I would agree with the suggestion above that the input could be polished. If you have access to a lathe the task would be much simplified.

Mart.

[1948F-1Pickup]

Originally Posted by Mart

The pilot bearing is a standard metric bearing with a 17mm bore. The bearings will be sized to a very tight tolerance. If the input shaft does not slip in, as the input is new I would suspect it is not sized correctly. Do you have another shaft you could try the bearing on? Or do you have a means of measuring the shaft accurately?

I would agree with the suggestion above that the input could be polished. If you have access to a lathe the task would be much simplified.

Mart.

I'm in the bearing business as a sales engineer for a major manufacturer.
You would think pilot bearings are more accurate and harder to align and
less tolerant of mis-alignment. Not always the case though.
Although not a flathead application, I recently battled reinstalling a
transmission using a pilot bushing (NOS and miked), where it previously
had been installed using a pilot bearing. It was a major PITA to slide that trans in place. I ended up making two studs for the bottom two transmission
mounting holes to guide the trans in place. Didn't need that kind of accuracy when I did the trans last time (when the pilot bearing was in the crank).

[B-O-B]

Which brand of bearings are made in the USA? So far I have three different brands of(203) made off shore.

[hulleywoodworking]

Originally Posted by B-O-B

Which brand of bearings are made in the USA? So far I have three different brands of(203) made off shore.

I don't know what brands are USA made. I usually use Japanese made Nachi bearings; I've had good luck with them.

John

[1948F-1Pickup]

Originally Posted by B-O-B

Which brand of bearings are made in the USA? So far I have three different brands of(203) made off shore.

High quality 6203's are from Japan. Many of the rollers around those sizes
are as well. ABECs too. (NSK, Nachi, NTN, etc.)
I work for NTN (Osaka), our US headquarters is in Mount Prospect IL.
A number of years ago we purchased most of the old Federal Mogul manufacturing facilities back East (Elgin IL, Macomb IL, Hamilton AL, etc.)
when FM decided to cease US production and source EVERYTHING offshore.
We build our stuff in those old facilities, under the BCA & Bower trade-names, since we bought rights those too.
We are one of the only bearing manufacturers in the US. Most of our automotive hub line is produced in Elgin. (OE and aftermarket)
Timken, Schaeffler/INA, FAG also does some production here in the USA as
well. Much of their stuff is sourced globally however.