1, the role: is a mechanical transmission, and peace keys, semi-circular keys, like the role of the diagonal keys, are to transmit mechanical torque.
2. Structure: There is a longitudinal keyway on the outer surface of the shaft, and the rotating member on the shaft also has a corresponding keyway, which can keep the shaft rotating synchronously. While rotating, some can also make longitudinal sliding on the shaft, such as transmission shift gears. The
3, application examples: in the brake, steering mechanism. There is also a retractable shaft consisting of inner and outer tubes. The outer tube has internal teeth, and the internal tube has external teeth and sleeves. In use, it can extend and retract in the longitudinal direction while transmitting rotational torque.
4, Material: 40Cr
5, heat treatment. Hardened surface hardness HRC45--5
