Custom Rear Hubs, Bearings & Discs

[Jeemy]

As promised here are the drawings & photos I supplied to the manufacturers. Do note these were largely unnecessary as they already had the plans before. There will be more detailed versions coming soon back from them.

I believe the hub with the curved bevel to the centre spigot are the aluminium versions. You can see the new versions compared to the old, some test pieces, and a back brake installation with the hubs and grooved discs, and a cat. I've had permission to post this and don't have credit for it all I am afraid. Lets never speak of aluminium again....

[Elanlover]

Clearly the cat's not impressed.

[Jeemy]

I doubt it will survive the safety testing.

[hodge]

canny things cats, usually land on their feet, even when wearing skates

[RayD]

Jamie,

Excuse me mentioning aluminium again on this thread but it’s where Karl asked the question. Maybe someone could move all the discussion posts elsewhere.

Dave,

Thanks for the kind remarks but I know that you in particular, and anyone else on the forum, would have arrived at the same conclusion had they exchanged 19 emails with Bob at the time.

Karl,

In answer to your question ...

Bob quickly identified that when the disc section was separated from the main part of the hub there would only be 5mm of material left between the wheel bolt thread and the outer surface of the hub.

Aluminium won’t sustain fine threads ... You can’t simply screw our wheel bolts into aluminium.

He needed a way of holding the wheels on without relying on aluminium threads.

He discarded the old fashioned splined studs because of the possibility of them spinning in the hub.

He was dissuaded from screwing studs in from the front with a locking nut on the back, and screwing cap screws in from the back as they both relied on aluminium threads and were susceptible to being unknowingly screwed out by an air gun operator tightening the wheel nuts up sometime in the future.

On the forum, the nearest he came to having a complete proposal for aluminium hubs was to further reduce the crucial 5mm by enlarging the hole and installing a threaded steel insert.

Even if it was a good idea to use the inserts which are primarily intended for thread repairs, they have a fundamental problem ...

According to the only information supplied, the inserts had the same thread on the outside as the inside to keep the wall thickness uniform and to a minimum ... the picture on the link will explain it better.

It’s accepted the standard wheel bolt threads are unsuitable for use in aluminium ... but the same threads - according to the information given - were to be used to hold the inserts in.

The difference in heat expansion of aluminium and steel was to be ignored on the grounds of both materials would be heating at the same rate, notwithstanding they would be expanding at a different rate.

Bob never had an acceptable, complete, aluminium hub design.

I don’t mean acceptable to me ... Bob agreed it wasn’t acceptable.

That isn’t to say the firm didn’t separately come up with something.

Something suitable in aluminium would be quite different to the original.

As Dave says...

“... whilst an ally hub can be made, re-making the original in ally isn't the same thing at all...”

I try to avoid using information from other sites but I thought this was interesting ... notice how they are onto their 5th version.

Ray

[paul27848]

Hello Jamie,
please let me know how to pay you the required deposit.

Regards, Paul

[Jeemy]

Payment info will go out tomorrow. Been roped into my little brothers wedding, ended up doing a load of printing & posting for him which is fine, but it takes SO much time just to put out 60 envelopes exactly how the little woman wants them…..

Also something else quite exciting, I'll show a picture on my thread,

So yeah, I'll actually be heading abroad on the 12th but this is definitely STILL closing then, we are at 18/20 people and there's no reason to hold anybody on the list up. So please, this is just a bump, if you want the custom hubs, you need to post up quick before I order them.

I have some info to post up soon once I get a second,

J x

[Jeemy]

Payment info sent to the people who've signed up for 18 out of the next run of these. I will be closing this list tomorrow (12th July) and prepping up the order for 20 items. The other 2 will either go to eBay with a donation to LEC, or latecomers can snap them up by payment of a deposit anytime before they arrive with me.

I'll be back in the UK on Monday, but deposits don't need to be received until next Friday 19th, I'll keep updating the thread just to confirm everything is in order.

Let me know via PM if you haven't received the info.

[Rambo]

Just got your PM this minute Jeemy. Lots to digest and it is midnight so will read tomorrow and get the cheque posted asap

[Rambo]

Doesn't shiny new steel look good ?

[Fredjohn]

Jeemy

Hope I'm not too late. Been a bit busy and away from easy access to site. Was on BB's last list before it fell of the planet. Added as No19. Please PM the payment arrangements when you can. Many thanks for organising this.

*CARBON STEEL REAR HUBS*

1. Jeemy
2. Nobby
3. theelanman
4. tb10 (N/A)
5. tb10 (S2 #790)
6. tb10 (S2 #711)
7. Nippy with Bearings
8. Propshaft with Bearings
9. davidcgriffiths
10. Karl Martin
11. lansledj
12. djcar
13. Rambo - when available will have a (drive) to East Lothian and pick up in person
14. ESM
15. paulsmithmk
16. paul27848
17. Steve Matthews (no bearings)
18. Sandra (M100sandra)
19. Fredjohn (with bearings)
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.

[Jeemy]

sent fredla. all formatting has dropped out but hopefully its legible, any problems let me know.

[Rambo]

Jeemy - electronic transfer made this morning for full amount

[Fredjohn]

Jeemy
Electronic transfer of deposit made this morning.
Many thanks.

John

[ESM]

Bank transfer just sent for the full amount - ref ESM.

[Nippy]

Hi Jeemy, cheque for full amount sent 1st class post today.

[Jeemy]

All electronic funds received. List updated. Bear in mind I will be away til Tuesday so don't worry if I don't update.

*CARBON STEEL REAR HUBS*

1. Jeemy
2. Nobby
3. theelanman
4. tb10 (N/A)
5. tb10 (S2 #790)
6. tb10 (S2 #711)
7. Nippy with Bearings
8. Propshaft with Bearings
9. davidcgriffiths
10. Karl Martin
11. lansledj
12. djcar
13. Rambo - collecting - - full payment rec'd
14. ESM - full payment rec'd
15. paulsmithmk
16. paul27848
17. Steve Matthews (no bearings)
18. Sandra (M100sandra)
19. Fredjohn (with bearings) - deposit rec'd
20.

[paulous]

All electronic funds received. List updated. Bear in mind I will be away til Tuesday so don't worry if I don't update.

*CARBON STEEL REAR HUBS*

1. Jeemy
2. Nobby
3. theelanman
4. tb10 (N/A)
5. tb10 (S2 #790)
6. tb10 (S2 #711)
7. Nippy with Bearings
8. Propshaft with Bearings
9. davidcgriffiths
10. Karl Martin
11. lansledj
12. djcar
13. Rambo - collecting - - full payment rec'd
14. ESM - full payment rec'd
15. paulsmithmk
16. paul27848
17. Steve Matthews (no bearings)
18. Sandra (M100sandra)
19. Fredjohn (with bearings) - deposit rec'd
20. Paulous

Apologies for joining at the very last minute but please can i take the final set!? Jeemy I'll PM you now regarding payment.

[paulous]

Now that I've hopefully joined the list for these please can I ask a few naive questions...

What discs are recommended with these new hubs?

Will the PNM engineering rear caliper conversion still fit OK? Or does this now open up other alternatives?

My brake upgrade plan was Hi Specs at the front and PNM calipers at the back. Now throwing in to the mix these new rear hubs but I'm not sure what discs and calipers to consider at the rear now?

Any advice would be appreciated.

Thanks

Paul

[Jeemy]

Hi Paul,

No problem, consider them yours. Payment info follows.

I will as stated above post the disc info shortly.

I am waiting for permission and to check a few things.

Long story short:

- you can fit any disc with the same PCD, thats the beauty. This also means you need to pick the right disc for your application.
- the original recommended discs are slightly too small for the PNM caliper replacement kit (as it is now) I believe
- there is obviously a slightly larger disc that will fit the PNM set - cliff is testing out 2 types but I am not 100% to post up the disc type just yet

I am working to gather together all the information for fitting with OEM, Hi-Spec, PNM and anything else people have working. But its a lot of cross-checking before I can post stuff without risk of getting rubbished which I am a lot more concerned about now. So I won't post on the thread until everything is checked and verified so I don't get any mud slung at me.

I am fitting the PNM callipers to my rears. Its a question of getting a disc to match but others are doing this as we speak and I should have a definite answer to post hear.