Expansion Shell Mining Rock Bolts

Supreme Machinery is one of the professional China Expansion Shell Mining Rock Bolts manufacturers and suppliers. Expansion Shell Mining Rock Bolts acting as an accessory on rock bolt, it is screwed on the rock bolt, then inserted into drilling hole.the rotate the rock bolt until the shell can not be expanded, and the rock bolt tightly fixed in the drilling hole.

Expansion shell is comprised with 2 pcs shells, 1 pc spring,1 pc tapered nut,and connect band.

We manufacture it with hot forging,Punching, Turniung,tapping threads production processes.

Product Details

Production Process

Machining Workshop

We have full set line of machining facilities, various CNC equipment and Machining Center can meet customers’ requirements. After machining, the casting parts will be completed. Then, they will be inspected and packed for delivery and shipment.

Quality Control

Checking the raw material after they reach our factory------- Incoming quality control

Checking the details before the production line operated

Have full inspection and routing inspection during mass production---In process quality control

Checking the goods after they are finished---- Final quality control

Checking the goods after they are finished-----Outgoing quality control

Packing and Delivery

Packaging of Expansion Shell Mining Rock Bolts can be customized based on customer requirements to meet the different needs, such as plastic bag, carton box, wooden case, crate, etc.