Source for weld on sprockets

[eric82930]

I'm building stuff again and wondered if anyone has seen steel 520 sprockets with a smooth bore to weld to a hub.

 

[Sheetmetalfab]

https://shop.pbisprockets.com/product.sc?productId=548

I believe J&L snowhawk uses taper lock keyed hubs. (Available through mcmaster carr)
Probably plenty strong and much easier to change sprockets.

 

[NEWDUCK]

https://www.mcmaster.com/sprockets

I use the Ansi 50 flat sprockets.

 

[HenryTheHammer]

Should be able to will call at McMaster Carr or Grainger.

 

[HalfBrit]

It doesn't look like they carry 520 chain or sprockets, just industrial ANSI and metric.
I need a weldon sprocket for my mototrax. Since motocrap won't return my email and I'll have to mod it again.

 

[Sheetmetalfab]

It doesn't look like they carry 520 chain or sprockets, just industrial ANSI and metric.

I need a weldon sprocket for my mototrax. Since motocrap won't return my email and I'll have to mod it again.

50 ansi sprockets fit 530 chain.

Or you can grind or machine the ansi sprocket thinner until 520 chain fits.


Sent from my iPhone using Tapatalk Pro

 

[eric82930]

I was hoping to find a 17t 520. The 530 is pretty fat.
I have a lathe but never has luck cutting hardened steel. Is there any easy way to cut the center out of a splined sprocket?

 

[Sheetmetalfab]

I was hoping to find a 17t 520. The 530 is pretty fat.
I have a lathe but never has luck cutting hardened steel. Is there any easy way to cut the center out of a splined sprocket?

I’ve spun and ground ansi sprockets to 520 width.
(Keep it cool for hardening). It’s not too bad.

You could always buy a front sprocket that fits a bike with a huge output shaft.
(Then the center hole would fit over whatever)

Would probably take some research.

A 17t 16 ts sprocket is flat with a 1” 6 spline center hole.
Could grab the outside in the lathe chuck and lean on a die grinder inside it.

 

[CATSLEDMAN1]

smooth bore

I have build from scratch 5 snow bike that used smooth bore steel sprockets.

what I found is good price and best quality was Japanese steel sprockets, wore really well and a little tough to machine but, machined smooth and nice.

The more common industrial hardend steel sprockets, I just chucked them in my lathe at high speed, ground then thin with a 6" hand held grinder, takes about 3 minutes, maybe, just cover your ways with some canvas or something to keep the grindings out of your glides on the lathe.

I just did a set for a guy that owns one of my old handbuilts, he brought me some Chineese hardened, I just ground them.

 

[eric82930]

Thanks for the good ideas. If i can hand grind the surface hardening off will it cut like mild steel or does the hardness go all the way through?