100:1 Mini Metal Sealed Gear Motor
The 100:1 Mini Metal Gear Motor is about 25% more motor than our GM12a (in speed, torque, and power consumption), but has an enclosed gearbox!
3mm diameter D shaped shaft
The performance of the GM20 makes it fit between the GM11a and GM12a, but more noticeable, it has a sealed gearbox.
No more cat whiskers getting caught in the gearworks!
No more cleaning out dust-bunnies and re-lubricating with exotic muskox oil!
And it makes the gearbox even more resistant to side-loads
These also have a beefier set of mounting holes, threaded for 2-M1.6 metric screws.