How to Centre Sprocket on Hub?

[silversledder]

I purhased wheel hubs, sprockets and brake drum/band from Northern Tool. Now I'm setting up chain and found that my sprocket and hub are not precisley centred with each other such that the chain is tight, then 1/2 rotation later it is slack, then tight, then slack and so on. The play in the alignment appears to be simply a result of the hole sizes and the bolts going through. When I loosen them off, I can shift the relative centre of the sprocket and the hub centres (am I explaining this right?).In reality the ecentricity is probably only out a few millimetres, but enough to make it noticeable and make me wonder how long a 35 chain will last under load. Aside from trial and error adjusting, does anyone have a trick or procedure to set this up/align the centres simply the first time?

 

[Russ2251]

I've been fighting this a long time. I would also like a definitive answer.
Have been somewhat successful using trial and error w/some improvement but still not 100% centered.

 

[zanegrey]

only snug up the bolts so that when you turn the wheel the hub
will automatically center itself ..

turn the wheel a few times and then tighten the bolts a 1/4 turn at a time ..
turn the wheel a few more time and then tighten 1/4 turn again

do this until all bolts are tight and you should be very close to center..

 

[5trucks]

Buy the sprocket that has the hub machined into it already. Guaranteed to be centered. I had this same problem only i created it. I had to order a new sprocket and the hub holes didnt line up. so being the mechanic i am, i eyeballed it and drilled a few more. Put it on cart, adjusted chain tensioner and proceeded to test drive. Chain went slack tight slack tight. Then i figured it out. My bad but fixed it with the sprocket i mentioned above.

 

[Russ2251]

Buy the sprocket that has the hub machined into it already. Guaranteed to be centered.

Got a link?

 

[5trucks]

http://www.surpluscenter.com/item.asp?UID=2008081116310094&item=1-2413-72-E&catname=powerTrans


This is the sprocket i ordered. I have some pics i'll post later. It looks nothing like the picture on the site.

 

[Russ2251]

Won't work for me. Thanx anyway.

 

[5trucks]

What's your issue?

 

[Russ2251]

1 wheel drive kart sprocket and brake drum held to rim with 4 studs and nuts/lock washers. There is enough play for adjustment but just can't get that last percentage point.
Perhaps I'm too much of a perfectionist.

 

[5trucks]

Here is what it looks like:

 

[Kenny_McCormic]

1 wheel drive kart sprocket and brake drum held to rim with 4 studs and nuts/lock washers. There is enough play for adjustment but just can't get that last percentage point.
Perhaps I'm too much of a perfectionist.

Have you tried bolts with a non thread portion on them?

Or maybe a shoulder bolt?

Have somebody with a lathe make you some spacer tubes?