Author Topic: Small end bush outer diameter  (Read 225 times)

Offline bikerjohndavies

  • John Davies, Bath, UK
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  • 1953 BSA A10 Super Flash Project
Small end bush outer diameter
« on: 17.12. 2019 12:50 »
Does anybody know the standard outside diameter for a A10 small end bush. I have 2 that I want to use but one measures about 7 thou larger OD than the other. Not sure if its just bad manufacturing or maybe one is oversized.
1937 Panther M100 Rigid, 1946 Ariel Square 4, 1952 Norton Model 7, 1953 BSA A10SF (WIP), 1954 Ariel VH, 1961 Triumph T120R

Online JulianS

  • 1962 A10
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Re: Small end bush outer diameter
« Reply #1 on: 17.12. 2019 13:47 »
This table from the 1966 Alpha Bearings catalogue may help.

The A10 bush is SE109 right at the bottom ofthe photo.

Offline a10rgs

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Re: Small end bush outer diameter
« Reply #2 on: 17.12. 2019 14:02 »
Or have a look at BSA Service sheet 702

Offline bikerjohndavies

  • John Davies, Bath, UK
  • A's Best Friend
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  • Join Date: Jun 2010
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  • 1953 BSA A10 Super Flash Project
Re: Small end bush outer diameter
« Reply #3 on: 17.12. 2019 18:33 »
Thanks guys, the Alpha list is a great help. The service sheet 702 only shows the ID and I need the OD.  Have now measured them with a micrometer and the smaller one measures .878 so standard whilst the other is 10 thou larger. At least now I know what I have to work with. Cheers,
1937 Panther M100 Rigid, 1946 Ariel Square 4, 1952 Norton Model 7, 1953 BSA A10SF (WIP), 1954 Ariel VH, 1961 Triumph T120R