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Self-drilling hollow anchor bar consists of six parts, namely, hollow drilling bolt, drilling bit, slip stop plug, anchor coupler, anchor plate and nut. The drilling bit is made of abrasion resistant steel alloy. Various kinds of drilling bits, single line type, cross type, taper etc. are able to meet different stratums. Hollow bolt is made of seamless tubes of high tensile steel alloy. With a high and new technology, it integrates functions drilling, grouting and anchoring at one time.
Self drilling hollow anchor bar is widely used in tunnel presupport, slope and roadbed reinforcement, and tunnel disease treatment as an efficient anchoring means, providing the optimal solution for railing, bolting, micro piling and as ground anchors in different ground and rock conditions.