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D1 Rigid hub spindle
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Wagga
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November 21, 2020 - 11:07 am
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Hi all, I'm wondering if anyone can tell me what the difference is between the rear wheel hub spindle for a rigid and a plunger frame. I'm aware that the rigid is smaller, but wondered if anyone could tell me where the difference is?  Is it the whole shaft or just the threaded part that sits in the frame? Not sure if I could get away with using a plunger hub by sourcing undersized inner diameter bearings if it's just where the spindle sits in the hub? I hope this makes sense? Thanks in advance for any help 

Regards

Pete

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GlenAnderson
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November 21, 2020 - 11:29 am
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The whole hub is different. The spindle is thinner for its entire length, the bearings are smaller on both their inner and outer diameters, the hub’s centre is smaller and all the associated nuts, spacers etc. are smaller. 

A competent machinist could make a stepped spindle that allowed rigid furniture to be fitted to a plunger hub, or reducing collars to fit the rigid spindle and bearings. Sadly, plenty of incompetent people tend to have got in there first, hacking at rear frame mounts or mis-assembling stuff. It might be as simple as making/modifying some special outer sleeved nuts, but I’d need to have a measure to state that with confidence. 

There’s postings on this topic if you search the forum. One particular member has had extensive (mis)adventures in the field. 

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Wagga
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November 21, 2020 - 11:34 am
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GlenAnderson said
The whole hub is different. The spindle is thinner for its entire length, the bearings are smaller on both their inner and outer diameters, the hub’s centre is smaller and all the associated nuts, spacers etc. are smaller. 

A competent machinist could make a stepped spindle that allowed rigid furniture to be fitted to a plunger hub, or reducing collars to fit the rigid spindle and bearings. Sadly, plenty of incompetent people tend to have got in there first, hacking at rear frame mounts or mis-assembling stuff. It might be as simple as making/modifying some special outer sleeved nuts, but I’d need to have a measure to state that with confidence. 

There’s postings on this topic if you search the forum. One particular member has had extensive (mis)adventures in the field.   

Thanks Glen. I tend to spend a lot of time searching the forums but can't find anything that is related. I'll keep trawling. 

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Stoo63
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November 21, 2020 - 11:52 am
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** Please log in to view **  may help, Pete.

 '55 D3 Battery; '58 Square Four (project); '59 D1 direct lighting plunger; '59 Tiger Cub; '60 5TA;  '76 FS1-E; '91 GTR 1000;  '97 Honda Sky SGX50.

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GlenAnderson
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November 21, 2020 - 12:01 pm
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Wagga said

Thanks Glen. I tend to spend a lot of time searching the forums but can't find anything that is related. I'll keep trawling.   

Look at Ibayorkies D1 project. Take a deep breath before you start mind. 

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Stoo63
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November 21, 2020 - 1:27 pm
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"D1 spindle bantam forum" on google  will lend most results

 '55 D3 Battery; '58 Square Four (project); '59 D1 direct lighting plunger; '59 Tiger Cub; '60 5TA;  '76 FS1-E; '91 GTR 1000;  '97 Honda Sky SGX50.

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BillShas
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November 21, 2020 - 1:44 pm
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Pete

please see photo, below

 

top spindle is front wheel, middle is rigid rear-its longer, but same diameter- bottom is plunger, rigid brake hubplate has smaller hole and different brake cam lever to move rod out inline with pedal, no plunger shrouds to get around

Most other parts for hub are compatible with front wheel

 

image-10.jpeg

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Wagga
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November 21, 2020 - 9:53 pm
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BillShas said
Pete

please see photo, below

 

top spindle is front wheel, middle is rigid rear-its longer, but same diameter- bottom is plunger, rigid brake hubplate has smaller hole and different brake cam lever to move rod out inline with pedal, no plunger shrouds to get around

Most other parts for hub are compatible with front wheel

 

image-10.jpeg  

That's very helpful. Thanks very much indeed. I'm sorta feeling my way around a box of bits and struggling to be honest. Thanks again!

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BillShas
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November 22, 2020 - 11:10 am
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Pete

if you want to use the plunger hub rear wheel you have on the rigid frame

In one of the other posts on the forum, I found this solution which might work for you, as well as the bearings you would need to sleeve the spindle where it goes through the speedo drive if you don’t have one with the smaller hole, 

note the spindle reducers are placed in the bearings before the bearings are fitted

you would need the correct longer rigid rear spindle, they are available from sj engineering / eBay and others and the normal larger size correct spacer tube for the plunger rear hub to go between the bearings, 

IMG_0969.jpg

If you desperately want a rigid rear wheel, I have one which I bought from eBay wrongly advertised as a plunger item

regards

Bill

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Wagga
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November 23, 2020 - 11:50 am
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BillShas said
Pete

if you want to use the plunger hub rear wheel you have on the rigid frame

In one of the other posts on the forum, I found this solution which might work for you, as well as the bearings you would need to sleeve the spindle where it goes through the speedo drive if you don’t have one with the smaller hole, 

note the spindle reducers are placed in the bearings before the bearings are fitted

you would need the correct longer rigid rear spindle, they are available from sj engineering / eBay and others and the normal larger size correct spacer tube for the plunger rear hub to go between the bearings, 

IMG_0969.jpg

If you desperately want a rigid rear wheel, I have one which I bought from eBay wrongly advertised as a plunger item

regards

Bill  

Hiya Bill, I'm really trying to get a rigid rear wheel but not having much luck finding one. What money would you want for yours and would you be willing to post it to me in Pembrokeshire please?

Regards 

Pete

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Stoo63
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November 23, 2020 - 12:47 pm
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Pete/Bill- best to use the PM facility to discuss any business. "Walls have ears" as they used to say, although I've never seen any. Seriously, there have been a huge number of attempted cyber incursions lately and anyone can see what's posted on the public part of the site thumbs-up

 '55 D3 Battery; '58 Square Four (project); '59 D1 direct lighting plunger; '59 Tiger Cub; '60 5TA;  '76 FS1-E; '91 GTR 1000;  '97 Honda Sky SGX50.

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Wagga
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November 23, 2020 - 1:18 pm
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Stoo63 said
Pete/Bill- best to use the PM facility to discuss any business. "Walls have ears" as they used to say, although I've never seen any. Seriously, there have been a huge number of attempted cyber incursions lately and anyone can see what's posted on the public part of the site thumbs-up  

Point taken Stoo. Cheers 

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