I am not sure what gearbox this is, it seems to be related to the GEM 500, but I can not find a part number on it. It’s an old gearbox our team found in it’s scrap pile, and we used it in this configuration for our ball pickup, but I am curious as to the turn down from the gearbox. Any help is appreciated! Thank you!
This is the O.G. version of the AndyMark Planetary. Same gear reductions and everything. 
Did that early AM Planetary include stand-offs for mounting the FP motor? I like the breathing space that this mounting style provides (i.e., does not block the front ventilation holes in the motor case), but I wonder if it is stiff enough when the robot is shock-loaded? Also, how is the motor power coupled to the gearbox? With the stand-offs as shown, it appears there will not be much axial engagement for the motor pinion.
Billfred is correct (as usual). Also, the standoff that Richard is referring to is part of the cap. Notice that the cap is thin on the edge. This was for motor ventilation. The newer version of the cap has slots in it instead.
Andy
Thank you! As stated we had used this set up as a part of our ball intake, and for some reason, this motor was pulling a really high current (~10 amps if memory serves correctly). We tested one with no load and it was roughly the same (a little less). Therefore, before IRI, we’re considering changing it out, but we weren’t sure of the turn down. Now that we know that, we can move forward a lot clearer. Thank you!!