Rigid rear wheel sprocket bolts

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alan.moore
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Rigid rear wheel sprocket bolts

Postby alan.moore » Thu Jun 07, 2018 9:49 pm

Whats the consensus of opinion regarding the securing / locking of the ten 0522 bolts for the rear wheel sprocket. The parts book shows the locking tab below but is it Ok to use a serrated washer and / or loctite instead?

4319-29.jpg


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Alan
1939 VH Redhunter;1942 RN WNG;1951 Triumph 6T Thunderbird;1970 BSA B175 Bantam;1986 Yamaha SRX600 single
http://cloggymoore.wix.com/triumph-pre-unit-6t

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Brian_Walker
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Re: Rigid rear wheel sprocket bolts

Postby Brian_Walker » Fri Jun 08, 2018 1:22 am

Mine are drilled and wired for racing as its unlikely I would change it once fitted. Once you get on a roll with locking wire just about everything that could come undone ends up up drilled and wired!
1951-52 VCH under restoration

nevhunter
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Re: Rigid rear wheel sprocket bolts

Postby nevhunter » Fri Jun 08, 2018 2:03 am

The bolts have a slightly oversized shank originally which is a good fit in the original sprocket holes. It the bike is ridden with these loose at all , the hub threads rapidly become ovalized and the hub is not useable. The bolts must be quite tight and remain so to prevent this deterioration of the threads. Bit like the clutch basket to large sprocket screws which are slightly more critical and must be really Bl**dy tight to not move. The rear sprocket tabs look nice and original if they are readily available Nev

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alan.moore
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Re: Rigid rear wheel sprocket bolts

Postby alan.moore » Sat Jun 09, 2018 11:52 pm

Nev,
Thanks for the info. , the tab washers are 4319-29 and Drags do them at £1.07 each !!
1939 VH Redhunter;1942 RN WNG;1951 Triumph 6T Thunderbird;1970 BSA B175 Bantam;1986 Yamaha SRX600 single
http://cloggymoore.wix.com/triumph-pre-unit-6t

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Re: Rigid rear wheel sprocket bolts

Postby nevhunter » Sun Jun 10, 2018 1:06 am

Check they are the correct size to stop the tab rotating. They must touch the step on the brake drum casting that locates the sprocket to be effective. Some tabs I have here don't do that so don't serve their purpose. Nev

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alan.moore
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Re: Rigid rear wheel sprocket bolts

Postby alan.moore » Tue Jun 12, 2018 11:33 pm

nevhunter wrote:Check they are the correct size to stop the tab rotating. They must touch the step on the brake drum casting that locates the sprocket to be effective. Some tabs I have here don't do that so don't serve their purpose. Nev


Nev, could you measure the thickness of one of the tabs you have got. I am going to have a go at making them myself
Cheers
Alan
1939 VH Redhunter;1942 RN WNG;1951 Triumph 6T Thunderbird;1970 BSA B175 Bantam;1986 Yamaha SRX600 single
http://cloggymoore.wix.com/triumph-pre-unit-6t

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Re: Rigid rear wheel sprocket bolts

Postby nevhunter » Wed Jun 13, 2018 1:13 am

The type you are interested in measures .018"( Eighteen thou) THICK, which is close to half a millimeter in Mild steel sheet. Re my post two preceding, I suggest you make the larger protrusion a bit longer. I suggest about .025", to make sure they won't just turn,, and fail to act as a lock tab at all . The one you picture may be a better fit than the ones I have which look as if they have been around for a long time. Are you going to get them plasma cut? . There's probably a lot who would use them if available and sure to work. Nev


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