GM3 - Gear Motor 3 - 90 degree Shaft

Motor, gears and shaft work well, recommend buying recommended wheel attachments together to ensure fit. Warning: Electrical leads are extremely delicate and will not survive more than one or two solder attempts. Ensure wires are secured after connections made, as this is how our electrical leads tore off due to wire movement.

This was my first puchase online from the RobotShop, but it will most certainly not be my last. The motor I purchased shipped the same day and arrived 2 days later! Plus, it was exactly as advertised and works like a charm. Thanks RobotShop --- keep up the great work!!

Nice little motor. In fact all of the GM series motors are great - as long as you don't need to connect motor shaft to anything "off the shelf", i.e. gears, pulleys, couplings, shafts, wheels ... well pretty well anything for that matter. Problem is these guys have a 7mm dual flat shaft. Solarbotics has a GMW wheel that will connect, but unless you're willing to build something that connects to the GMW, you are pretty well euchred. You could make a shaft adapter on a 3D printer - if you have one - but this would be unsuitable for a commercial quality product. The only way I have been able to connect the shaft, is by turning a shaft coupling, drilling a 6mm axial hole, reaming it out to 7mm, and then using two set screws, 180 degrees apart to locate on the flats. But this is a lot of work - might as well pay a few $$$ extra and buy a motor with a round shaft. Otherwise excellent quality, but solder lugs break easily rendering motor as scrap.

Bought this as a replacement for the 90 degree yellow motors I have on a robot, based on the advice offered in this forum pots: https://www.robotshop.com/community/forum/t/moving-from-cheap-yellow-motors-to-low-cost-dc-gear-motors/25901. The advice looked genuine to me and appeared to be authoritative (as if from someone working for Robot Shop). When the new motors arrived they did indeed fit into exactly the same mountings as my previous yellow motors but the drive shaft is a completely different size, meaning new wheels and tyres. Now I've done that they do a good job but, they are not a direct replacement.

This is a well made good quality motor highly recommended