We have aluminum alloy and 45# steel type, What's the difference between aluminum alloy type and 45# steel type?
The aluminum alloy is lighter, and the two fixing screws are 90-degree design; the 45# steel type has high hardness, and the two fixing screws are 180-degree design. If the torque is relatively large, it is recommended to buy 45# steel type.
Flange Shaft Coupling, suitable for model shaft connection, perfect accessories for RC Model motor, etc. A special coupler, which can fix one shaft to a plane and install other parts on the shaft easily. Double connection points fasten the coupler tightly.