Generator pulley 59 for a fan bolt om

[big deuce]

Originally Posted by ndnchf

It turns out that generator I showed a few days ago was a mix of parts, not a true '39 standard/pickup generator. It was not functional as it was. But I restored it into a fully functional, 2-brush with pulley mounted fan - very similar to the rare '39 standard generator. This uses the extra large bearing to carry the fan load, not the standard 2-brush bearing. I just had it running on the test bench this morning, putting out over 30 amps :-)

I'll be bringing it to Hershey in less than 2 weeks. It will be for sale on my table along with other restored generators. If you are there, stop by and say hi. South chocolate CJ 71-73.
Steve

Do tell what the "larger front bearing was used". The .590 shaft from 32-36 use two tapered roller bearings for fan use and needed lubrication. I couldn't find a tapered roller used in pairs for the later, larger .669 diameter shaft. I took apart my '41 generator, and removed the single roller bearing. The pocket size to work with is 40mmx 14mm, shaft size 17mm. I have this one coming, should fit right in, whether I use a fan or not, its good for radial loads from the belt.
LR5003NPPU Track Roller Double Row Bearing 17x40x14 Sealed Track Bearings VXB Brand

[ndnchf]

Originally Posted by big deuce

Do tell what the "larger front bearing was used". The .590 shaft from 32-36 use two tapered roller bearings for fan use and needed lubrication. I couldn't find a tapered roller used in pairs for the later, larger .669 diameter shaft. I took apart my '41 generator, and removed the single roller bearing. The pocket size to work with is 40mmx 14mm, shaft size 17mm. I have this one coming, should fit right in, whether I use a fan or not, its good for radial loads from the belt.
LR5003NPPU Track Roller Double Row Bearing 17x40x14 Sealed Track Bearings VXB Brand

In the 1938-1939 period (and a few other specialty generators) they went to what I call the big bearing, a 6303-2RS Ball Bearing 17mm x47mm x14mm. Apparently Ford engineers determined that this bearing could handle radial belt loads and axial fan thrust loads. It was much simpler and less costly than the multi-part tapered roller bearings package used in 1932-1937 generators. After generator pulley mounted fans were discontinued, they reverted back to a smaller 6203 bearing as used in model A tube generators.

As side note - In 1932-1937 generators I use a 5202-2RS double row angular contact bearing with custom machined inner and outer race spacer rings to make up the stack height difference. These modern sealed bearings are designed to take both radial and axial loads.