Shandong Tongrui Mining Technology Co., Ltd.

(1) roll-formed from high strength steel band with one end tapered tip for easy insertion into a drill hole, the other end has a welded ring for holding the bearing plate. (2) provideimmediate ground support in radial and axial direction. Be good for immediate ground support, but not suitable for very soft strata and permanent support. (3) fast and easy installation with hand held or mechanized bolting equipment. (4) no cement grout and resin cartridge needed. (5) available with both black and galvanized. It is based on the request of each client.

Tightlok cable bolt is made of steel strand, and has perfect support capacity. Usually be used in the area where common grouted support is vacant or inadequate, and especially good for permanent ground support with some resin cartridge . Features: 1. Has incomparable flexible capacity and anti-shearing capacity. 2. Available in two different diameters with both black and galvanized. 3. Usually packed into roll to save working space, especially in confined areas. 4. Can use the conventional bolting equipment. 5. Specially designed birdcage system can greatly improve the resin mixing and anchorage result. 6. Plain or bulbed options available, bulbs available at either 0.5m or 1m spacing. 7. Fish hooks fitted to cables for retention in holes prior to grouting. 8. Usually matched with Washer, Grip(Barrel & Wedge) and Dome Plate. It is based on the request of each client.

Tightlok grooved bolt is made of hot rolled bar with several forged grooves at one End, usually used for hardrock support. Features: (1) Groove device makes resin mixing easily and completely. (2) Fast and easy installation by mechanized tools. (3) Used together with resin cartridge for permanent support. (4) With pin nut device, nut can help drive the rod to mix the resin. It is based on the request of each client.

Tightlok threadbar bolt is composed of hot rolled ribbed bar, high strength plate , damping nut , yield tube, washer , and other accessories. Usually used in thick coal seams with very high stress and large Deformation. Features: (1) High tensile strength and good support capacity which can prevent the roof from sinking and sliding. (2) Fast and easy installation by mechanized tools. (3) Used together with resin cartridge for permanent support. (4) Sharp end device makes installation easier and faster. (5) Left hand thread direction available. (6) Specially "sandwich"device can buffer and release the pressure.

Full thread bar bolt is used together with dome plate and net for reliable ground support in mines, tunnels, slopes, or wherever. Feature: (1). The bar has closely defined mechanical properties which provide consistent performance under long term anchor loading. (2). In the longitudinal direcition , rock body has equal tensile strength , that is about 40% higher than the reverse-twist bolt in the same specification. (3). Extend the support area , not only be used by end anchoring , but also be used by fully anchoring , that has a better Support efficiency. (4). Low price, widely used in coal mines, railways, hydropower and other types of roadway projects. (5). Thread profile offers excellent mixing capabilities in resins installation. (6). The high ductility and smooth, relatively flat rate of strain hardening ensures a high margin of safety against tensile/shear overload in the case of transverse movements in the rock soil. (7). Can be cut and spliced at any point along its length. It is based on the request of each client.

Material: high carbon spring steel, spring steel, stainless steel, alloy steel Compression Spring, Extension Spring : Wire Diameter: 0.2-40.0mm Torsion spring wire diameter :0.2-35mm Surface Finish: black , Zinc, Nickel, silver, golden, tin, powder coating, shot pin Applications: Automotive, medical device, agricultural machinery ,electronics, toy, electric power distribution. Extension spring hook include Germany hook, British hook, Side hook We can customize special design of springs based on your requirement.