how to design sprockets

[KathieK]

[quote=Cory]I seem to remember Team 173 saying that they made sprockets on their CNC machine, either for themselves, or to sell for a profit. Perhaps one of them could elaborate.[quote]

I'm sure that one of our CNC Committee members can elaborate. But yes, we make our own aluminum sprockets - CNC Software (producers of MasterCam Software) is one of our sponsors!

You are not that far from us - perhaps a field trip is in order?

[Travis Covington]

The machinerys handbook has all the ANSI Sprocket Tooth Forms for roller chain sprockets. It also has all the neccesary information for flange thickness and tooth section profile dimensions.

It is not super complicated to create a sprocket. Sit down with the tooth form and profile information and you should be able to make a CAD/CAM drawing fairly quickly.

[Tom Bottiglieri]

RAGE cnc'd us some sprockets out of delrin for testing purposes in our drive train... which reminds me we should test them lol. Compared to steel, these things were as light as air and seemed to be pretty strong. I'm not sure if it will hold up through the bashings of our transmission though

[Dick Linn]

Since we don't have access to a milling machine, I've been trying to find a source of reasonably priced aluminum sprockets. This may be a good source

http://www.jackssmallengines.com/gok...msprkt_35f.cfm

19 to 94 teeth, prices from $14 to $36. Looks like they will custom drill them, though they don't list the cost for that.

Now all I need is a reasonably light flange with a keyway to attach them to a 1/2" or 5/8" shaft.