Transmission options

[Rimrock]

Servonaut planetary gearmotors are strong, quiet and compact. Over here in the old world a lot of folks that are into RC trucks, quickly throw out the noisy, backlashing Tamiya 3 speed, and it's motor which is more suitable for Formula 1...Most popular is the GM32U370, 7.2 V and output speed of about 370-400 rpm. (The speed with a standard 1:2.666 differential with equal 2'nd gear on a standard Tamiya 3 with a motor turning 6-7000 rpm, as of e.g an LRP Truckpuller) Will give a speed of 1.5 mph, which many find very suitable, and have no trouble dealing with total weights of 50-60 lbs. there is also the GM32U450, 12 V, which got double power. Costs about 100 USD. I don't know if there are any dealers over there, or what shipping cost from Germany. Will be cheaper disassemble a battery screwdriver, if one comes over one with a suitable rpm. About 150 rpm on the wheels of Tamiya 1:14 size tires gives the 1.5 mhp speed..

[ricm]

My vote would be a pre-assembled gearmotor as suggested by Izzy - absolutely right to look at the robot parts suppliers....

try http://www.technobotsonline.com/

these guys have a HUGE range to suit pretty much anything. And pricing is pretty good