What is this electric motor for???

[RPW]

I would guess a grain elevator, maybe a hay elevator (get those bales to the upper loft).

 

[Lazy]

it would appear to be a repulsion start, Induction run motor if it has brushes.
AC motors that are similar to universal motors. In a repulsion motor, the armature brushes are shorted together rather than connected in series with the field. By transformer action ,the stator induces currents in the rotor, which create torque by repulsion instead of attraction as in other motors. Several types of repulsion motors have been manufactured, but the repulsion-start induction-run (RS-IR) motor has been used most frequently. The RS-IR motor has a centrifugal switch that shorts all segments of the commutator so that the motor operates as an induction motor once it has been accelerated to full speed.

 

[pat32rf]

If it has a start switch that shorts out (disconnects) the brushes once its up to speed, then you have a motor with high starting torque that will run at a fixed RPM. If there is no switch and the brushes stay in use, then you have a motor with high starting and running torque that will slow down or speed up as load is applied (like an old 1/2" drill, or a starter motor).

 

[hilltopper34w]

If it has a start switch that shorts out (disconnects) the brushes once its up to speed, then you have a motor with high starting torque that will run at a fixed RPM. If there is no switch and the brushes stay in use, then you have a motor with high starting and running torque that will slow down or speed up as load is applied (like an old 1/2" drill, or a starter motor).

I vote for conveyor motor.