The fixing principle of the expansion screw is to use the wedge Angle to promote the expansion to generate friction grip to achieve the fixing effect. The screw is threaded at one end and tapered at the other end. Bread outside a tin (have a plenty of steel tube), iron cylinder (steel tube) half number of incision, put them together into a good hole in the wall, then lock nut and the screw nut to pull, pull taper into the tin drum, tin drum is open, so firmly fixed on the wall, and is generally used in fence, rain loose, air conditioning, etc on the materials such as cement, brick of fastening. However, its fixation is not very reliable, if the load has a large vibration, may occur loose, so it is not recommended for the installation of ceiling fans.
Contact Person: Aimee
Tel: +86 1583201860