Which dc motor gives above 20kg torque?

Answer 1

torque is not measured in mass units

20kg force = 20kg * 9.8meters/sec/sec

or 20Newtons

ive seen torque wrenches in kg-meters as well as newton-meters and foot-pounds

a pound is 32.2 slug feet/sec/sec

most power drills have dc motors if you get one with a large chuck 3/4" or so

it will have 20kg meter or 400ft lb ( brand name holehog for example)

older locomotives have dc motors on each axle usually about a 1-1 ratio gearing

300-500Hp for each motor

newer locomotives can use ac motors with the advent of variable frequency ac drives - although it takes a bit more power to achieve the same starting torque