Author Topic: Fixation from the spindle of the front wheel  (Read 969 times)

Offline Lippi

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Fixation from the spindle of the front wheel
« on: 07.06. 2020 15:56 »
Hi all

Let me introduce myself. My name is Lippi and I'm living in the Prinipality of Liechtenstein. Several years ago, I bought a BSA A10 Golden Flash from 1953. The bike was not used often since last year. I upgraded it with a new BTH Magneto and driving was fun. So actually I'm working on some maintenance. Also the front breakes. With a lot of effort I was able to pull out the spindle. I cleaned everything and it was very smooth to reassemble the wheel again. But now the problem came up. I have no idea how the spindle is fixed to the fork. Before i disassembled everything, the spindle just sticked in the fork. I was in luck that nothing happened. Could someone of you tell me how the spindle is fixed and what do I need? There's no thread inside the fork which fits to the thread on the spindle. Attache you will find a picture how it looks.

Best regards in advance and greetings from Liechtenstein

Lippi

Offline Swarfcut

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Re: Fixation from the spindle of the front wheel
« Reply #1 on: 07.06. 2020 16:12 »
Hi Lippi. MOST URGENT..   Do not use the bike as it is. The fork leg is the wrong one for your front wheel and spindle.  With no thread, there is nothing to hold the spindle in place on that side.

 The spindle has a left hand thread, and the fork leg you need  has a matching thread to fit the spindle. If the leg originally had a thread, it has been removed or ruined. The spindle screws in and secures the hub brake plate tightly against the fork leg.

 Show some more pictures and we can tell you what you need to put it right. The other leg may be wrong as well. The front wheel and brake are the correct parts for your model.

 Swarfy.

Offline Lippi

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Re: Fixation from the spindle of the front wheel
« Reply #2 on: 07.06. 2020 18:50 »
Hi Swarfy

This is exactly what I thought. There is something really, really wrong! And that's exactly why, I asked the specialists. Please tell me what do you like to see on the pictures and I will provide them.

Thank you very much in advance and have a nice evening!

Lippi

Offline Swarfcut

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Re: Fixation from the spindle of the front wheel
« Reply #3 on: 07.06. 2020 19:37 »
  Lippi   Welcome along to the Forum. Pictures of both fork legs, front mudguard, wheel spindle and if you like a picture of the whole bike.

     There is a section on the Forum for introductions. Meanwhile, head on over there, give us a little bit of of your story and how you got your bike.

 Swarfy.

Offline chaterlea25

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Re: Fixation from the spindle of the front wheel
« Reply #4 on: 07.06. 2020 20:09 »
Hi Lippi,
Welcome to the Forum
It looks like you need the correct fork slider with the threaded hole
The thread is 9/16 x20 Left Hand
A clever engineer might be able to make a sleeve with the thread and fit it to the leg ??

John
1961 Super Rocket
1963 RGS (ongoing)

Offline morris

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Re: Fixation from the spindle of the front wheel
« Reply #5 on: 07.06. 2020 21:50 »
Hi and *welcome*
Fork slider is not correct. The brake cable lug shouldn’t be there so I guess it’s from another model.
Below a picture of a correct one.
The other side should have a clamp bolt. Is it there?
'58 BSA A 10 SA
'52 BSA A 10 Plunger
'55 MORRIS ISIS
The world looks better from a motorbike
Belgium

Online Peter in Aus

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Re: Fixation from the spindle of the front wheel
« Reply #6 on: 08.06. 2020 01:55 »
Hi Lippi,  *welcome*
As sliders are a bit hard to come by (good ones) what you could  do is have a new spindle shaft made with a bit longer thread and use a nut to fix it in place. Some might disagree, but that is what I wood do. *beer*
Peter

Busselton West Australia
49 A7 longstroke
58 A10  SA

Offline Swarfcut

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Re: Fixation from the spindle of the front wheel
« Reply #7 on: 08.06. 2020 08:48 »
Morris.
 The cable lug definitely puts it from another model. With no thread in the lug, I am thinking that slider is from the slightly later Ariel Full Width  Hub type, which uses a through spindle and retaining nut.

 Anyone else think it is Ariel Type?  A picture of the other leg is what we need.

 Swarfy.

Online JulianS

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Re: Fixation from the spindle of the front wheel
« Reply #8 on: 08.06. 2020 11:09 »
Think it is C10 C11 fork bottom for 5 1/2 inch brake. Had plain hole and spindle nut with left hand thread and brake cable anchor on the leg.

Offline chaterlea25

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Re: Fixation from the spindle of the front wheel
« Reply #9 on: 08.06. 2020 14:50 »
Hi All,
Without having the slider in hand to compare its hard to say what model its from
From memory the C spindle is only a half inch
The C models mudguard bracket is in a different position to the A
If the lefthand leg has a clamp then as mentioned a custom spindle would work as well

John
1961 Super Rocket
1963 RGS (ongoing)

Offline Lippi

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Re: Fixation from the spindle of the front wheel
« Reply #10 on: 08.06. 2020 19:34 »
Hi all

As requested here some pictures from both side. Sorry for the poor quality. I took it in my garage. If anyone need more or magnified pics, let me know!

You guys are real specialists. Thank you so much for your help. I'm sure that we can find a solution.

Best regards and cheers

Lippi

Offline Swarfcut

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Re: Fixation from the spindle of the front wheel
« Reply #11 on: 08.06. 2020 20:21 »
Hi Lippi.  Very good pictures. The bike looks to have had a lot of time and money spent, it looks a pleasure to ride.

   The fork leg on the left side looks to be correct. The spindle should just fit in, matching the hole closely. If it is sloppy, then chance it is also the wrong leg.  There is a vacant hole, facing forward, under the spindle. This takes a bolt and when this bolt is tightened, this clamps the spindle.

 The nuts and bolts on your bike are not in general use these days, most common threads now are metric.  BSA used a thread system which we refer to as Cycle Thread. BSA originally made bicycles, and this was the thread system they continued to use.  This means any fastenings you need will have to come from specialist suppliers, not from your nearby auto store.

 So you need the correct fork slider for the right side.

 Part numbers to help you.

 Right fork slider  67 5050.... The one you need

 Left fork slider    67 5057.....The one I think you have, and looks correct.

 Clamp Bolt          65 5295     This is missing.  It is cycle thread, 26 threads per inch, 3/8"diameter shank, 1 3/8" long.

 Here is a link to an online parts catalogue

https://www.google.com/search?q=Draganfly&oq=Draganfly&aqs=chrome..69i57.6048j0j1&sourceid=chrome&ie=UTF-8

 You can search for any parts you need, and with the part numbers find your best deal.

 The forum has a literature section. Have a look for BSA Service Sheet 212B. This shows the front brake and hub and how it all fits together.

 Swarfy.





 

Offline RDfella

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Re: Fixation from the spindle of the front wheel
« Reply #12 on: 08.06. 2020 20:32 »
Those fork sliders are most likely B31 or Goldstar. If in fact there is no thread in the right hand slider, then the most likely explanation is a previous owner didn't know the thread is left hand and ended up drilling it out. If it were mine I'd get a new spindle turned up a shade longer, and put a nut on the outside. A half nut would be sufficient, so it needen't look out of place. Alternatively, can you get left hand helicoils?
'49 B31, '49 M21, '53 DOT, '58 Flash, '00 Firestorm, Weslake sprint bike.

Online Jules

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Re: Fixation from the spindle of the front wheel
« Reply #13 on: 09.06. 2020 11:49 »
Another alternative might be to keep the existing assembly as is, turn down the protruding part of the axle on the RHS and drill and tap a bolt in, to secure the RHS being careful to get it clamped but not "pulled in" - this assumes that the LHS is securely clamped and the RHS is still "snug" in the slider axle bore - does it matter if the slider (can the slider move inboard since it would not be "locked" on the inside perse')?? maybe not a good idea for hard riding, but ok for a café run?
OR instead of turning down the end of the axle, how about just turning up a steel bush that fits snugly over the end of the axle and securing it against the leg with a bolt tapped inside the end of the axle per above??..... the objective here is really only to locate the RH slider and stop it moving outboard, but I'm unsure about the possibility of it moving inboard, per above  *dunno2*...

Offline chaterlea25

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Re: Fixation from the spindle of the front wheel
« Reply #14 on: 09.06. 2020 13:00 »
H Jules and All
The design is such that the wheel and brake are anchored to the righthand leg by the threaded spindle
I would not be in favour of drilling the spindle,
We do not know if the spindle thread is intact? but the spindle looks loose in the fork leg in the photo
An inside/ outside threaded sleeve might work if the fork leg could be tapped????
The threaded section of the leg is not full width, the top hat sleeve that comes through the bearing and brake plate locates in a plain section of the leg

John
1961 Super Rocket
1963 RGS (ongoing)