Can someone identify this rear hub

[MAF]

When I bought my Golden flash a few weeks ago I started out by checking a few nuts and bolts and the upshot is every one I’ve checked up to now have not been very tight so I delved a little deeper and started looking at the rear wheel bearing because I was told he had changed them, when checking the wheel it didn’t spin freely, I found the bearings were in-fact new but after looking around on here worked out the hub was a s/a hub. I bought this one off e-bay as a a10 rear plunger hub, I bolted it up and it seems to fit fine but after looking at a post about these hubs mine again looks different. Can anyone identify this hub, as I say it seems to fit ok

[CheeserBeezer]

Looks like a plunger A10 to me.

[MAF]

Thank you for the reply, I was looking at a post regarding a10 plunger hubs last week and some said (with photos) there should be a threaded retainer both sides, am I missing something, is there a dust cap fitted covering the other?

[limeyrob]

Could it be the early A7 interchangeable front and rear hub?  I've never seen one in the flesh so I'm no expert but there are some similarities.  The spindle for the early hub is plain and for the later hub is stepped, this could mean that the wheel is not properly retained with the later spindle.  bolt it up and see if you can pull the wheel out of the drum.

[MAF]

I’ll give that a go today,
Thanks

[limeyrob]

Below are the parts links to the Draganfly website.  It looks like the spacer on the timing side is critical but while I can see it on the later hub I can't work out which part it is on the earlier hub.  You may be OK is the spacer fits.  Alternatively if you can be sure it is a '48 hub then you may be able to sell that a get a '51 hub for about the same money

'48 hub:
https://draganfly.co.uk/product-category/bsa/sparesparts-for-bsa-a710-b3133-c101112-m202133/wheels-abcm/front-wheel-abcm/4-splined-hub-interchangeable-with-rear-1947-48-a-group/
'51 0n:
https://draganfly.co.uk/product-category/bsa/sparesparts-for-bsa-a710-b3133-c101112-m202133/wheels-abcm/rear-wheel-abcm/11-splined-rear-hub-1949-55-plunger-swinging-arm-abm/

[Rex]

and some said (with photos) there should be a threaded retainer both sides, am I missing something, is there a dust cap fitted covering the other?

Plunger hubs do indeed have a threaded retainer on both sides of the hub.

[fffcycles]

Looks very close to the ones I have on my ‘48. I was putting a spare one in the build pile for my second bike yesterday.
Frank

[limeyrob]

I tend to agree, two threaded collars on '51 on and only one on '48.  Can the '48 be used with a '51 spindle (with the step) and if so, with which  spacer on the timing side?

[MAF]

I have fitted it and it is free spinning with no side to side lateral movements,
My problem is now how to get the rh the bearing out it’s capped at the rh side leg bearing easy but it has bearing seat/ring fitted in the hub

[MAF]

Should said left hand, don’t know where leg came from lol

[Rex]

Don't quite get your question there? The bearing should knock out from the other side?

[limeyrob]

You need Service Sheet 212 (not 212A) 1948.
Its in this link:
https://bsa-info.nz/service-sheets/
Download "A Group Except Swinging Arm"
Pages 36 on.
It shows the exact hub you have and purports to show how to remove that cover.
Having read it I'm less sure!

[MAF]

Hi Rex, if you check the photo you can see a captive ring that was under the bearing when it was removed, the collar nor the bearing will pass that. Maybe I can get that out and find a circlip of the correct size.

[trevinoz]

It looks like the remnants of the dust cover is still on the right side. You need to prise it off.