Lathe user?

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BertieB
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Lathe user?

Postby BertieB » Sat Apr 06, 2019 7:30 pm

Anyone out there who could recommend someone who could turn a rear wheel spindle on a lathe? I've got a '29 LF I've given up trying to find the correct rear wheel for it, so have dug a tiger cub wheel out of the shed which should do. My dad has two lathes, one the chuck is too small to take the size of metal I would need the other doesn't have a tailstock, so not ideal to do a spindle on. I've drawn up what I need in CAD, so any recommendations would be great. Thanks.

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Bob.Murphy
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Re: Lathe user?

Postby Bob.Murphy » Sat Apr 06, 2019 10:52 pm

Its the sort of job I'd do for myself (2 lathes & a Mill). I also have two Tiger Cub restorations on the go so have spindles to check sizes against.

I'm strapped for time at the moment - how desperate are you for it ??

I'll also need to confirm the grade of steel required.

If you PM me your CAD drawing I'll have a think about it and get back to you (always up for a challenge!).

Bob.
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BertieB
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Re: Lathe user?

Postby BertieB » Mon Apr 08, 2019 8:09 pm

Hi Bob, thanks for the offer, PM sent.

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Bob.Murphy
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Re: Lathe user?

Postby Bob.Murphy » Mon Apr 08, 2019 11:57 pm

I need some advice from the Metallurgists out there . . . .

I now have the CAD drawing of the wheel spindle that Bertie needs - but what grade of steel should I use ???

I'm thinking "Bright Mild" steel, but I could be wrong.

Help please.

Bob.
My avatar shows the late Len Rich in 1970 with the bike I now have - a 1958 Ariel VH

stuart.wilby
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Re: Lathe user?

Postby stuart.wilby » Sat Apr 13, 2019 9:58 am

I’d go to the nearest autojumble and look for a larger spindle if that’s possible, then turn it to your requirements.
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Re: Lathe user?

Postby john.whiting » Sat Apr 13, 2019 10:04 am

You need 4140HT....this will have the strength needed to get a sufficient torque on the retaining nuts to hold the axle in place,without threads distorting...........it is easy to machine ,and quite cheap,and being hardened and tempered ,needs no further attention.

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Bob.Murphy
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Re: Lathe user?

Postby Bob.Murphy » Tue Jun 18, 2019 11:25 am

Folks,

BertieB sent me his CAD drawing and it shows the wheel spindle threads as 1/2" Whitworth. I think this would be too coarse and should maybe be 1/2" BSF or BSCY.

I have send him two PMs but they're still sitting in my outbox so he isn't watching this site at the moment.

Any thoughts (the spindle is to fit a Tiger Cub rear wheel into a 1929 Ariel LF frame) ?

I have ordered some EN16 and EN24 steel round bar for this; I'll see how they machine before deciding on which to use. Both are considered suitable according to the specifications.

Bob.
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simon.holyfield
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Re: Lathe user?

Postby simon.holyfield » Tue Jun 18, 2019 11:39 am

I'd use BSC - definitely not BSW, it's too coarse for that application.

I'd avoid BSF on the basis that as far as I know, there are no BSF threads on Ariel machines in my garage - therefore adding a BSF thread is going to lead to confusion, or loose nuts.
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Re: Lathe user?

Postby tony.barnett » Tue Jun 18, 2019 12:19 pm

I use EN16T for spindles (fork, wheel etc). Threads should be BSCy not WW. I think Ariel used 1/2" 20TPI as opposed to the standard 26TPI for half inch, but guess that doesn't really matter so much.
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Re: Lathe user?

Postby Mick D » Tue Jun 18, 2019 1:46 pm

simon.holyfield wrote:there are no BSF threads on Ariel machines in my garage


You may want to check the side stand pivot and rear brake torque arm to hub on your FH - to avoid 'loose nuts' or confusion - ;)


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