So I am very new to this electronics hobby and trying to build a coffee grinder. I bought the [12V High-Power (HP) 25D mm Gearmotor] and connected it to a portable hand grinder. I have the motor hooked up to a variable power source so I can push 12V no problem but when I pour in a single coffee bean, the motor stalls and the current reads about 0.5A. I am sure I am misunderstanding this but I thought the stall current on the motor spec (https://www.pololu.com/category/186/12v-high-power-hp-25d-mm-gearmotors) was 5.7 Amps. With no load, it runs at about 0.17Amps. I measured the torque needed to grind the coffee to be 160oz-in so the specd torque should be enough and the power source can supply up to 24V/4 Amps so I should be good on power supply. My only thoughts are maybe the thin 22 AWG wire is too thin to support that current.
Any other thoughts on why I am stalling out when the motor should be almost double to torque needed? (240 oz-in speed vs 160 oz-in needed)
Any input is much appreciated!