Expansion Shell Roof Bolts

Expansion shell roof bolts are a type of fastener commonly used in construction and mining to secure heavy loads to concrete or other solid surfaces. These bolts consist of a threaded metal rod with a flared cone-shaped end that is inserted into a pre-drilled hole in the surface. When a nut is tightened onto the threaded end of the bolt, the cone-shaped end expands, pressing against the sides of the hole and providing a secure anchor point.

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Product Description

Model	Diameter	Unit	Bearing force (KN)
Model	Diameter	Unit	HRB335	HRB400	HRB500	HRB600
MG16	16	mm	>100	>120	>135
MG18	18		>126	>150	>172	>202
MG20	20		>157	>180	>210	>260
MG22	22		>190	>225	>250	>310
MG25	25		>240	>295	>295	>395
MG32	32		>290	>365	>335	>435

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 Roof Bolts can be customized based on customer requirements to meet the different needs, such as plastic bag, carton box, wooden case, crate, etc.