Rear wheel small bearing A7

[BSA500]

What is the skf bearing size for the rear brake drum bearing. I misread it and ordered the 6205 which was too big.

[Swarfcut]

  '500   I am thinking your A7 is an early S/A model with half width drum/sprocket and QD rear wheel.

 The bearing in the brake drum is an imperial size, the same size as the wheel bearings.   Size 7/8" x 2" x 9/16"

 Looks like you have ordered the larger bearing that fits the earlier Plunger brake drum.   Size     1" x 2 1/4" x 5/8" Part 89-3022

 These are standard sizes, but as Imperial sizes rather than Metric may be difficult to source from some bearing suppliers. Most suppliers offer a choice of brands and quality.  Choose a modern shielded type, these are a worthwhile improvement over the open type bearing for this application.

 Plunger  Wheel Hub uses the same size wheel bearings as early S/A  Wheel Hub. BSA Part 65 5883

 Swarfy.

[BSA500]

Sorry more info it's the full width hub. The old bearing id number has been partly erased so i cant read it. I know its a 6200 series skf

[JulianS]

If it is the full width iron hub you need 6204 (20m x 47mm x 14mm), full width Ariel hub takes different one RLS8.

[BSA500]

Brilliant thanks