Expansion Shell Mining Roof Bolts

Supreme Machinery has been producing Expansion Shell Mining Roof Bolts for many years and is one of the professional manufacturers and producers. Its products are widely recognized nationwide for their reliability and excellent quality, and exported to Europe, the United States, Africa, Australia with an eye on the future, the company will continue to improve and expand.

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Product Description

Supreme Machinery is a professional high quality Expansion Shell Mining Roof Bolts Manufacturers and Suppliers in China. Expansion Shell Mining Roof Bolts are a common style of area ground support. A point anchor bolt is a metal bar between 20 mm – 25 mm in diameter, and between 1 m – 4 m long There is an expansion shell at the end of the bolt which is inserted into the hole. As the bolt is tightened by the installation drill the expansion shell expands and the bolt tightens holding the rock together. Mechanical bolts are considered temporary support

Product Specification

Stamping Bracket
To	Drawing No		Certificate No.
Supplier	PO NO.	SBR003	Shipped QTY		2100
Inspector	Supervisor		Material
			Min.	Max	Compliance
	A	49.0	48.7	49.3	OK
	B	8.5	8.3	8.7	OK
	C	Ø34	33.7	34.3	OK
	Thickness	1.2	1.1	1.3	OK
	KS	Remove bur,Corrosion Protection			OK

Expansion Leaves
To	Drawing No		Certificate No.
Supplier	PO NO.	SBR003	Shipped QTY		2100
Inspector	Supervisor		Material		Q235
			Min.	Max	Compliance
	A	76	75.7	76.3	OK
	B	29	28.8	29.2	OK
	C	9	8.8	9.2	OK
	D	12	11.8	12.2	OK
	E	2	1.9	2.1	OK
	F	25	24.8	25.2	OK
	G	8.0	7.8	8.2	OK
	KS	Remove bur,Corrosion Protection			OK

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