rear chain sprocket bolt type?

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Aug 15, 2013 | 08:21 AM

Tooneyman

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From: Platte City, MO

rear chain sprocket bolt type?

Do the bolts for a rear sprocket (for a chain) need to have a small shank below the head or can the bolt be full-threaded? Does it matter either way? I've seen both for a chain sprocket.

Aug 15, 2013 | 08:29 AM

TwiZted Biker

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From: Niles Canyon Ca.

As long as the shank area doesn't get into the threads in the mounting holes your good either way , just get them torqued & loctited properly .

Aug 15, 2013 | 09:17 AM

Tooneyman

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From: Platte City, MO

Quote:

Originally Posted by TwiZted Biker

As long as the shank area doesn't get into the threads in the mounting holes your good either way , just get them torqued & loctited properly .

No chance of the sprocket moving a little if I use all threaded bolts then? Or is a little movement ok? I have used new 7/16"-14 SS bolts and torqued them to 45 ft-lbs. The hub has aluminum threads, not steel. Used the blue Loctite, too. Think all should be ok?

The last bolts in the sprocket had no evidence of the threads right below the head being damage (from the sprocket moving). Those few threads would have been in the sprocket bolt holes.

Aug 15, 2013 | 07:07 PM

TwiZted Biker

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From: Niles Canyon Ca.

Sprocket is going to pull up tight in one direction and stay there , it isn't like the chains reversing direction and banging things . Stainless because it isn't graded like steel bolts isn't a good choice for sprocket bolts too much torque & torsional stress going on back there and red loctite is recommended , your torque specs are dead on . If you run the stainless I would keep a regular eye on it for a while to make sure things don't work loose .

Aug 16, 2013 | 12:36 PM

Tooneyman

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From: Platte City, MO

Quote:

Originally Posted by TwiZted Biker

Thanks for the response. I have SS lock washers under the SS hex bolts and used blue Loctite on the threads. I don't think the bolts will work loose, but would the heads of the bolts break off due to the bolts being the SS material? That would be bad. Do you think the bolt heads will break off due to the SS material and the 45 ft-lbs of torque I put on the bolts? I will watch them just in case. The original bolts were a bit shorter than the new ones I installed and they were also SS bolts, too. I know they were pretty tight, but don't know if they were torqued down or how much torque was used (if any). The bike had about 3,799 miles on it before I got it and those original bolts were still tight. I now have the wheel back on the bike. It is a real pain to take off and put on the rear wheel for this bike. So, for now guess I will just keep an eye on the bolts for a while to see if they start to come loose or the heads start popping off. If I see any sign at all of any of this happening I will pull off the wheel and replace the SS bolts with steel ones that have a higher grade strength.

I will go back to the hardware store where I got the SS bolts to see if there is any way I can get the grade on them. Maybe they are a higher strength grade than just a standard SS bolt. hope so.

Last edited by Tooneyman; Aug 16, 2013 at 12:38 PM.