3620 used a drill transmission for intake in 2012.
Our choice was the classic
DeWalt model 940 XRP, mainly because I had some experience with that drill in earlier years. Several teams used it back in the day before such a nice variety of easier COTS gearboxes became available (thank you, AndyMark and VexPro!)
Please look at the classic CD
whitepaper "Nothing But DeWalts".
One tip: it will be easier to use a drill transmission if the drill motor you are replacing with a
BAG motor has the same shaft diameter (4mm). I have had good results drilling a 9/64" diameter hole in the end of the drill motor shaft to about the depth of the pinion, thereby weakening the shaft just enough so it will deform to let the pinion off.
__________________
Richard Wallace
Mentor since 2011 for FRC 3620 Average Joes (St. Joseph, Michigan)
Mentor 2002-10 for FRC 931 Perpetual Chaos (St. Louis, Missouri)
since 2003
I believe in intuition and inspiration. Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution. It is, strictly speaking, a real factor in scientific research.
(Cosmic Religion : With Other Opinions and Aphorisms (1931) by Albert Einstein, p. 97)