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!
If you are as much of a fan of the Solarbotics mini metal gearboxes as we are, you'll be pleased to know we've just brought in a nice complement to family - the GM20!
The performance of the GM20 makes it fit between the GM11a and GM12a, but more notably, 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. Yes, it can a pain to find metric screws (sorry).
Take a look at our latest motor datasheet and see for yourself where it fits into the family!