Reco on bearings to use for Alt rebuilding

[Rick B.]

Hello everyone,

I am inquiring in the hopes of education and gaining better knowledge on alternators. When rebuilding a C2 42amp 696 alternator I thought i would turn to the forum hoping to get a little more insight. Specifically, on the different types of bearings people use in a rebuild? I have heard Ina, or Torryrite, NTN but not sure of the pros and cons.

I do not have alot of knowledge as it pertains to this subject and any help is much appreciated.

Thanks guys inadvance

[Russ S.]

Re: Reco on bearings to use for Alt rebuilding

I haven't heard of Torryrite but Ina and NTN are both good bearings.

[Joe L.]

Re: Reco on bearings to use for Alt rebuilding

Hello everyone,

I am inquiring in the hopes of education and gaining better knowledge on alternators. When rebuilding a C2 42amp 696 alternator I thought i would turn to the forum hoping to get a little more insight. Specifically, on the different types of bearings people use in a rebuild? I have heard Ina, or Torryrite, NTN but not sure of the pros and cons.

I do not have alot of knowledge as it pertains to this subject and any help is much appreciated.

Thanks guys inadvance

Rick------


I think you mean TORRINGTON rather than Torryrite. Torrington primarily manufactures straight roller ("needle") bearings although other types of bearings manufactured by others may be sold under their brand name. The split ring end (rear) bearing is the type manufactured by Torrington.

The drive end (front) bearing is a ball bearing. Any of the major bearing brands will supply a good ball bearing. However, these days most of these bearings are going to be sourced from off-shore manufacturers, mainly in Asia. This does not make them bad, though. The Timken part number is 203F. However, I do not know that Timken actually manufactures this bearing since Timken is primarily a manufacturer of tapered roller bearings and high quality steel. The GM bearing is discontinued.

By the way, the end of the split ring end bearing can be seen. Original bearings have a certain script which is visible and, I think, is judged. The drive end bearing cannot be seen when installed and its exact configuration from a judging perspective is moot.

Also, the Federal-Mogul/National part number for the split ring end bearing is MNJ-471-S.