Derek, Thanks for the input. I've actually been thinking about this a bit after your comment. The motors I am using (http://www.monsterscooterparts.com/24v-350w-motor-dirt-quad.html) have a metric ISO 05 (8mm pitch) sprocket. I can find sprockets with that pitch easily enough, but nothing with a 1/2 bore (obviously a metric sprocket has a metric bore). What might be a cheaper option, is to keep the 20 tooth sprocket that the motor comes with and buy the ISO 05 sprockets and just bore them to 1/2" for the drive shaft. I have a 1/8th keyway broach already so it shouldn't cost me anything other then the cost of the sprockets.
This brings me to a second though: what do people typically use for their drive ratio? The motors are geared down to 375RPM, so with a 1.25:1 drive ratio (25/20), thats about 300RPM on the drive axle. My track sprockets are 4" in diameter, so thats a top speed of ~315 fpm (3.6MPH), is that too slow? (my math may be wrong, or I may be misunderstanding the physics here) On Tue, Dec 4, 2012 at 6:30 AM, TyngTech <[email protected]> wrote: > Yep. Frank has the broach and has been providing sprockets for several > years now. > > ST > > > On Tuesday, December 4, 2012 1:39:14 AM UTC-5, [email protected] wrote: >> >> I thought some of the east coast guys were already doing this sort of >> thing? >> >> Derek > > -- > You are currently subscribed to the "R/C Tank Combat" group. > To post a message, send email to [email protected] > To unsubscribe, send email to [email protected] > Visit the group at http://groups.google.com/group/rctankcombat -- You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to [email protected] To unsubscribe, send email to [email protected] Visit the group at http://groups.google.com/group/rctankcombat
