After cutting anchor bolt is also called self cutting mechanical anchor bolt. After expanding mechanical anchor bolt needs secondary reaming before adjusting equipment.

The operation principle of the post cutting mechanical anchor bolt is based on the mechanical lock key of the anchor bolt  the anchoring force of the concrete attack, which is mainly based on the size of the torque force. After the drilling is completed, the anchor bolt equipment uses a torque wrench to torque the screw. When a certain torque is reached, the mechanical lock key of the anchor bolt will automatically open  cut into the concrete.

After the first reaming is completed, professional reaming equipment is required to expand the hole at the bottom of the hole again (note that the bottom of the hole after the second reaming is a cone)  then put the rear expansion anchor bolt into the bottom, use the awl cone to the bottom, turn over the anchor bolt lock key,  then use the torque wrench to apply torque to fully open the lock key.

The expansion screw is an ordinary anchor bolt. It is mainly based on the expansion of the expansion screw  the sudden expansion of the hole wall to achieve the anchoring effect. It is generally used to fix temporary equipment  methods.