Rear hub bearings - fresh thinking or already been done?

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Re: Rear hub bearings - fresh thinking or already been done?

Postby silverbullet » 10 Jun 2017, 13:33

News!!!!! :D

For those of you not on facecloth, you will be unaware of the "T3 restoration group" (a necessary evil to reach a wider audience) where I have announced my intention to finally tackle this matter.

To cut a long story short, the remaining stocks of new hubs seem to have dried up (although I have been told that there are some old stock SA bearing carriers available via Classic parts or maybe Heritage, but the QA isn't all that and they suffer from variable tolerancing and poor bearing "fit")

FAS and Burley went 50/50 to make a billet steel replica in the USA, but importing them will turn the $ price into £ and more with shipping, duties and the current state of sterling :(

So...I intend to initially make a couple of pairs of OEM replacement prototypes in order to assess the viability of the project. 14"/2wd first, then a 16" variant, which will hopefully also be the basis of a modular drum-or-disc upgradeable unit.

There will be the potential to machine these for larger or alternate bearing designs for a HD application (standard drum backplates being the limiting factor with the OEM bearing sizes) I am aware of Bernd Jaeger's Touareg bearing-based units for the Rallyebus, but that's not an option afaics.

This will not be "design by committee" but feel free to voice/repeat your thoughts on the matter.

If anyone has a bare 16" housing they could lend me (for measuring purposes) for just a few days, I would be most grateful :ok

FYI steel has now been ordered.
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Re: Rear hub bearings - fresh thinking or already been done?

Postby silverbullet » 10 Jun 2017, 15:21

My reference 14" housing doesnt look too bad, but it is almost 0.003" out of round in old money when measured with just a vernier..[img]https://uploads.tapatalk-cdn.com/20170610/ad3ef46fc331b4c9c0c899c1702d60b9.jpg[/img][img]https://uploads.tapatalk-cdn.com/20170610/f0764b7b4f30891dc96364a3c6e86948.jpg[/img][img]https://uploads.tapatalk-cdn.com/20170610/ed15f6c21a7767c5d976d36e3b2b4982.jpg[/img]

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Re: Rear hub bearings - fresh thinking or already been done?

Postby silverbullet » 13 Jun 2017, 09:48

Steel is in.[img]https://uploads.tapatalk-cdn.com/20170613/98772d6800c28512e768fb78feb96461.jpg[/img]

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Re: Rear hub bearings - fresh thinking or already been done?

Postby clift_d » 13 Jun 2017, 10:06

Nice.
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Re: Rear hub bearings - fresh thinking or already been done?

Postby silverbullet » 15 Jun 2017, 16:26

First op underway, hopefully some 16" dimensions coming to me shortly too :)Image[img]https://uploads.tapatalk-cdn.com/20170615/a22b844723a412ad8efca147057ce200.jpg[/img]

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Re: Rear hub bearings - fresh thinking or already been done?

Postby bene » 15 Jun 2017, 22:05

Love it!
Any one for cricket? what what?
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Re: Rear hub bearings - fresh thinking or already been done?

Postby silverbullet » 19 Jun 2017, 17:04

Lots of programming and some initial optimisation today, trying to get the cycle times down to make them affordable :))
There is a lot of metal to come off these...currently over 40mins to mill that circular boss but it is 200mm diameter coming down to 84mm and 35mm long.
I can't cut the lug contour until I have tool holder long enough, 10mm shy at the moment which would make a mess of things! Should have one here Weds.ImageImage[img]https://uploads.tapatalk-cdn.com/20170619/fb241a65343b414aaa2aa799aee0499e.jpg[/img]

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Re: Rear hub bearings - fresh thinking or already been done?

Postby Jim San » 19 Jun 2017, 17:19

Looking good. :ok
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Re: Rear hub bearings - fresh thinking or already been done?

Postby Weem Machine » 19 Jun 2017, 17:25

Exciting stuff!
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Re: Rear hub bearings - fresh thinking or already been done?

Postby DSM » 20 Jun 2017, 07:59

Afraid I haven't looked in for a while but really pleased to see another of your projects being realised. :ok
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Re: Rear hub bearings - fresh thinking or already been done?

Postby silverbullet » 20 Jun 2017, 11:37

Thanks Duncan, glad to hear from you too.
This one had to stew until the time was ripe.

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Re: Rear hub bearings - fresh thinking or already been done?

Postby silverbullet » 21 Jun 2017, 10:36

Drilling big holes this morning.[img]https://uploads.tapatalk-cdn.com/20170621/59b89d4e97ff8b6034ed9ba2fa930f13.jpg[/img]

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Re: Rear hub bearings - fresh thinking or already been done?

Postby silverbullet » 22 Jun 2017, 11:04

Starting to look familiar...Image

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Re: Rear hub bearings - fresh thinking or already been done?

Postby bene » 22 Jun 2017, 11:39

oooooooo thats good....
Any one for cricket? what what?
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Re: Rear hub bearings - fresh thinking or already been done?

Postby silverbullet » 03 Jul 2017, 15:35

All going into the mix. 16" will be priced lower than 14"/2wd due to smaller blank and hence less material removal.
Does anyone have a pic of the ABS boss on either type?Image

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