Driven sprockets?

[ReynardF1000]

Gents;
I'm using split, anodized aluminum sprockets and they are not lasting beyond about four hours. The anodizing wears off at about three hours and the sprocket lasts about one hour beyond that point. I'm now considering changing to one piece steel sprockets.
Are any of you using one piece steel sprockets? Do they last for several hours?
Thanks!

[ghickman]

Gents;
I'm using split, anodized aluminum sprockets and they are not lasting beyond about four hours. The anodizing wears off at about three hours and the sprocket lasts about one hour beyond that point. I'm now considering changing to one piece steel sprockets.
Are any of you using one piece steel sprockets? Do they last for several hours?
Thanks!

You should be getting longer life than what you described. Assuming your chain line is spot on and you keep it properly lubed. My guess is the material your sprockets are made of is 6061-T6. If so they will not last....

I now CNC machine my own sprockets from 7075 because the ones I've purchased from Sprocket Specialties are junk. The bolt hole BCD accuracy is terrible and the tooth profile is incosistent and they have run out beyond what I'd expect.

The split sprockets may not last as long due to run out. I personally don't like them but I know guys that use them with no problems.

GH

[ReynardF1000]

Thanks, Gary.
Your comments regarding Sprocket Specialists was telling. That's where my sprockets came from. I went to their facility and ordered them directly. The sprockets have large metric holes and I'm using them on a Beasley hub with English holes. This makes it difficult to get on center, even though I've built cylindrical shims to make the sprockets run concentric with the drilled holes (yes, the sprocket does run out of round anyway...).
Do you know where good quality aluminum sprockets can be purchased?

[RussMcB]

FWIW, I got a custom split sprocket from Sprocket Specialist to fit my Honda differential and it has been fine. Bolt holes were good. Split sprocket is a lot easier to R&R on my car. I don't have a lot of miles on my car yet, but haven't noticed any wear issues thus far.

[glenn cooper]

They make 'em for Taylor.
I believe they also used to supply Sprocket specialists, who have now/recently started making their own, or sourced elsewhere.
I just got a few sets.
GC

[Dave Gomberg]

I am using sprockets from http://www.rebelgears.com/index.html

For "insurance" purposes, I bought two of each size I thought I would need. I have yet to go to the second set for either of the sizes I have used regularly on my DSR over a period 5 years.

I had the sprockets split and drilled by someone else, but I believe Rebel will do that for you.

Dave

[formulasuper]

Thanks, Gary.
Your comments regarding Sprocket Specialists was telling. That's where my sprockets came from. I went to their facility and ordered them directly. The sprockets have large metric holes and I'm using them on a Beasley hub with English holes. This makes it difficult to get on center, even though I've built cylindrical shims to make the sprockets run concentric with the drilled holes (yes, the sprocket does run out of round anyway...).
Do you know where good quality aluminum sprockets can be purchased?

The center hole in the sprocket is what should be used for centering it on it's carrier hub, not the mounting bolts. The carrier hub must be machined to perfectly fit the center hole of the sprocket. I turned my own aluminum 6061-T6 carrier hub on a metal lathe to fit the Hayabusa sprocket's center hole..

[ReynardF1000]

Thanks, guys.
Some great information here and good reminders of things I knew and had forgotten, especially that fact that the base diameter is the most important detail to correct sprocket alignment and stability.

[Jnovak]

We have bought sprockets from Sprocket Specialists & Rebel Gears. The Rebel sprockets are a better quality period.

Thanks ... Jay Novak