In general, choose C35 more material, C45, but shall be heat treated. High strength request of bearing steel.
Mainly used for positioning, also can be used to connect, he relies on interference fit is fixed inside the pin hole. Cylindrical pin used to locate is usually not affected by load or small load, the number of not less than two, on the direction of fitting of the whole structure of a symmetric distribution, from as far as possible, the length of the pins in each fitting within about 1 ~ 2 times the diameter of the small.
Cylindrical pin shaft can also do with a straight cylindrical pin shaft can do, even the centering pin. So what is the difference between the shaft and pin. Shaft can be used to transfer torque, bending moment and torque under, cylindrical pin used to locate, bear extrusion pressure and shear forces.