Drill no gearbox 19670 rpm
Drill with Bosch Gearbox high gear 1550 rpm
Drill with Bosch gearbox low gear 460 RPM
I personally recommend the team 716 2003 single speed transmission (in the whitepapers). It was fairly simple and lots of fun to build and it worked great. It has a nice low output speed too which is good for big tires. I do suggest you get extra drill gearboxes. You should remove, rotate, and reinstall the motor cage to lock the drill in low gear, then put a blue rubber band over the shifter clips, and then a hose clamp (not too too tight) over that. That method has worked best for us. Make your drill transmissions easily removable and have extra couplers and left hand bolts ready because you will have a transmission fail at least once and the coupler never comes off (a least not without a fight) after it has been run. That's just the nature of the Bosch drill transmission in FIRST robots. But as for all the parts outside of that, flawless.
If you have any questions on the team 716 2003 single speed gearbox, contact Andy Brockway, the designer. We used it this year and made a few slight changes/improvements and have a full inventor model and you can contact me with any questions as well.
