I'm currently building an robotic arm and I want the elbow joint to be comparable to a human one But here's the problem, electric linear actuators are too slow and have low torque, same goes with regular hobby servos and stepper motors
Ideally I would want a brushless motor with no gearbox that could hold a 10kg weight at an arm's distance (let's say 40 cm) and move freely at around 100rpm (about 10rad/s)
Holding force: 40 N.m
No load moving velocity: 100rpm / 10 rad/s
I was thinking sensored brushless motors could do the trick but surely that load would be too much for those...
If this cannot be achieved, would it be possible to use a 3D printed 100:1 planetary gearbox and a low kv motor to do it?
Thanks in advance, if you have other types of motors that would be more suitable please comment them, any help is appreciated.