Hi Guys. Can anyone help. I am starting to put my 101 basket case back together. But I have a problem with the rear hub. Can anyone tell me the correct length of the 101 rear hub/Hollow Shaft? The hub I have is 7" across.
So when I put the hollow shaft in the hub there is only a small amount of thread to fit the brake plate on and then it won't fit in the frame. It fits in if I don't fit the brake plate on to the hollow shaft.

Many thanks for any help

Norm

Hollow axle 8" long and thread length is approx. 3/4".

Hope this helps.

Mike.

Hi Mike and Carl-Erik.  Many thanks for your help.

The shaft I have is 8" long, with 3/4" thread.   The hub has ball bearings fitted at the moment; they were not fitted in the hub when I purchased the box of bits.

So I'm not sure if I have the wrong hollow shaft for the hub, or the wrong bearings for the hollow shaft.

I intend to have another look at the hub tomorrow to see if I can work out what hub I actually have, based on Carl-Erik's information.

Many regards

Norman

Hi Mike,  Just checked the frame, All OK.  I have had a look at the Hub.

There is a groove that I think must be for a retaining ring.  But only on the break hub end.  I this normal.  Or should there be a groove on both ends when Timken bearings are fitted.

Regards

Norman 

There is differences in the hubs for ball bearings and roller bearings. At a first glimpse the hubs looks (almost) similar and has exactly the same outer dimensions but at inside, the ball bearing outer race has a larger diameter than the Timken bearing and the Timken race seat is machined deeper than the ball bearing race. There is other minor machining differences, mainly for the grease deflector and felt sealing. Of course the hollow axle differs to suit the different bearings.

Rear hubs with Timken bearings can be distinguished from the outside by that they have humps. The humps is reinforcement bulbs on the inside of the spoke flange, the rear hub can have a hump at one or both flanges. Ball bearing hubs does not have those humps. Front hubs is a bit tricky, both versions has a hump inside the spoke flange, but the hump is wider and more square for the Timken bearing.

The Timken bearings is easy to replace, you'll find them readily over the counter at some bearing shop, they are plenty strong and long lasting. New bearing balls is easy to find for the ball bearings, it is more difficult to find reproduced races for the hubs, but it possible to adapt ordinary ball bearings with some machining, bushings, a distance tube or a new hollow shaft.