How to Install the Two-head Screw

1. Lubricants must be used when installing double-head bolts, in order to prevent the bolts from getting stuck during screw-in, and can also be removed for repeated installation. In order to ensure the fastening end of the double-head bolt and the tightness of the equipment body thread, and not in the process of loading the nut, the two-headed screw chain appears any loose phenomenon, so the fastening end of the two-headed screw should be used over-waves, give the rear middle diameter has a certain amount of excess, you can choose the form of the shoulder structure, or the latter several laps of the thread shallow depth tightening method, when the two-head screw is loaded into the soft material thread rest.

2. The axis line of the double-head bolt must be perpendicular to the surface of the body, in the bottom hole and tapping must pay attention to this, installation is best to use the angle ruler to check, when the shaft line and the surface of the body appear a small amount of tilt, you can use a tap to correct the screw hole, tilt larger can not be corrected with brute force, in order to prevent bolt damage.

3. Double-head bolts have the function of connecting the fixed links of machinery, both ends of the two-headed bolts are threaded, the middle screw has thick and fine, the double-head bolt is mainly used for boiler steel structure, mining machinery, bridges, motorcycles, automobiles, large-span steel structures, towers and large buildings.