The self-drilling Hollow bar anchor system is comprised of a hollow threaded bar with an attached drill bit that can perform drilling, anchoring and grouting in a single operation. The hollow bar allows air and water to freely pass through the bar during drilling to remove debris and then allow grout to be injected immediately after drilling is completed. Grout fills the hollow bar and completely covers the entire bolt. Couplers can be used to join hollow bars and extend the bolt length while nuts and plates are used to provide the required tension.
NingBo SPT Engineering Material Co.,Ltd .Primary business in manufacturing and selling rock support thread bars. Kinds of Grouting hollow thread bar, reinforcing steel bar, LHD thread equicohesive bar ETC. Beside of selling at domestic china markets, also export to Euro, North America, South America, Australia. Annual production output got to exceed to 2000 metric tons.
In order to follow up country’s guiding principle of infrastructure of highway and railway projects, our company devote itself to make high-efficient and good quality products. delivery products in punctually, contribute itself capacities.
NingBo SPT Engineering Material Co.,Ltd welcome worldwide customers coming for business.
Keywords： Self Drilling Anchor Bolt china manufacturers factory