Motor

Eschew obfuscation.

The 59a is between the NEC values of FLA for 40 and 50 hp motors.

460v x 59a = 27140 kg is the max load.

What??? Those units just don't make any sense at all. Voltage times current is watts. Watts are a unit of power which is the first time based derivative of energy. One unit of power can always be accurately translated into another unit of power (Watts→Hp) but power does not translate to mass. Now to even attempt to find out what the maximum mechanical load can be one can try to apply Newton's law of motion F=ma. Obviously many other things must be known to apply this. First how fast of an acceleration is desired also most motors produce torque instead of a force. To know how much torque a motor can develop requires knowing many more aspects than just the power it can produce.

This is precisely why I made my original comment. Not enough information is known to be helpful.

Oh, at 460V and with a motor being the electrical load it is likely that this is actually three phase power so the peak electric power released is about 47kW. √3*460V*49A≈47kW If all of this power was successfully converted to mechanical power at the motor shaft it would be 63hp but the earlier NEC 40hp to 50hp mentioned earlier likely includes the nominal power losses one should expect in a real motor.

That which is shown on the maker's label attached to it.