Detailed Product Description

The spring pin means the pin having the function of spring that is called roll pin or self-lock pin. In general, the spring pin is made through this process: a steel band is molded into a cylinder-shape and then, gaps are given to it in the vertical direction, which is inserted into a hole whose diameter is a little smaller than the outer diameter of the pin. By doing this, inner pressure works around the hole, which prevents the pin from separating. The steel band should be heat-treated so it gets to have sufficient strength against the shear force. Compared with the parallel pin, its inside is empty so it is light. The end (one or both) of the pin is rounded for easy insertion into the hole.