Top Suppliers Weight Lifting Guide - Anchor Bolts For Fixing Bracket – Tianhongyi

Elevator expansion bolts are divided into casing expansion bolts and vehicle repair expansion bolts, which are generally composed of screw, expansion tube, flat washer, spring washer, and hexagonal nut. The fixing principle of the expansion screw: use the wedge-shaped slope to promote the expansion to generate frictional binding force to achieve the fixed effect. Generally speaking, after the expansion bolt is driven into the hole on the ground or wall, use a wrench to tighten the nut on the expansion bolt clockwise. The bolt goes out, but the metal expansion sleeve inside does not move, so the taper under the bolt is The head expands the metal expansion sleeve to make it fill the entire hole, and the expansion bolt achieves the fixing effect. The expansion bolts for elevators use 8.8 grade, the tensile strength meets the requirements of GB7588, and they are made of stainless steel metal materials. They are suitable for anchoring installation of various steel structures, machine room parts, and elevator brackets. It has the advantages of simple structure, small drilling diameter, high anchoring strength, high expansion coefficient, anti-vibration and heavy load.

1. Choose an alloy drill bit that matches the outer diameter of the expansion bolt, then drill the hole according to the length of the expansion bolt, drill the hole as deep as you need for installation, and then clean the hole.

2. Install the flat washer, spring washer and nut, screw the nut to the bolt and the end to protect the thread, and then insert the inner expansion bolt into the hole.

3. Twist the wrench until the washer and the surface of the fixed object are flush. If there is no special requirement, usually tighten it by hand and then use the wrench to tighten it three to five turns.

1. The drilling depth is preferably about 5mm deeper than the length of the expansion tube.

2. The harder the expansion bolts require on the wall, the better, and the force strength when installed in concrete is five times that of bricks.