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Making an agitator for a composting unit

Q: I am interested in making an agitator for a composting unit. The diameter of the compost tub is about 2000 millimeters, while the diameter of the agitator will be about 1500 millimeters. The vertical shaft will be approximately 500 millimeters long, and I want the unit to run at 15 RPM. I need to find out the motor capacity, the shaft diameter and the expected torque for this operation.

A:

Motor capacity — 1.5 KW

Shaft diameter — 38 mm

Torque — 950 Nm