Just looking for clarification on 775. First, what does 775 mean? Second, what are the differences between the different types of 775 i.e. 775pro, 775 Redline, 775-125, and and Banebot 775?
RS775 /Banebots 775 are the original 18V or 12V one that was created for non-FRC specific use. It is not the same as the Redline 775 or the 775pro. The Redline &775pro are essentially identical and are designed for FRC usage.
This doc I threw together might help.
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“775” is a motor class. Any motor in that class will have similar size and case, but can have slightly different specs based on the internals.
775Pro and Redline are essentially the same motor, as was determined when the Redline was released. They have slightly higher performance than the others; the primary difference is the Redline’s dashing red uniform.
For a Banebots 775… Be very careful. They sell 12V, 18V, and 24V 775 motors, and you want the 12V (though the 18V were legal for a while, they did have case short issues one year). I’d have to check legality for all of those but I’m 90% that the 24V isn’t legal.
For all of those motors, you want the motor spec sheet and test data to tell the performance difference. They should all work with any gearbox advertised to work with a 775 motor, though; you could easily have a Redline in a Versaplanetary (and get funny looks from a lot of people while doing it).
You missed another example of an FRC-legal 775: the AndyMark PG motor, sans gearbox.
In essence, the motor class is a form factor–for everything else, it comes down to the priorities of performance needs, resilience to high loads, and cost. Compare VEX’s testing of the PG-series motor and the 775pro (which would also apply to the RedLine): the PG motor can only supply 40-55 watts of peak power, but it can do it for beyond two minutes. On the flip side, the 775pro is in the 200s…until it dies a horrible death around the 90-second mark.
The difference is more than a “slightly” can cover, but hopefully that demonstrates the differences.
To be fair to the 775 pro if you look at the locked rotor stall test the AM RS-775 will burn up waaaaaay before the 775pro when outputting the same stall torque without even considering gearing. The 775 pro is a more efficient motor due to it’s higher RPM which means more power and less heat. If you take a 775 pro and limit the voltage to 4 volts you’ll actually get more performance than a AM RS-775 and you can stall it all day without any issues.