Threaded button bits

　　Threaded drill bits are also known as button bits which connect with threaded drill rods by threads to transfer impact power and rotation torque for breaking rocks. The threaded drill bits, working with hydraulic drill rigs and hydraulic jumbos, have main threads of R22，R25，R28，R32，TR35，T38，T45，T51，ST58，ST68，EL60，EL68 and T60, which are widely used in open-pit mining, underground mining, tunneling, anchoring, furnace tapping, tunnel construction, hydropower engineering, quarrying and construction.

　　In 1991, LHS firstly in China imported from Europe thermal insert technology of button bits, which fully drove and increased the quality level of Chinese button bits. Now, LHS ranks the first in the industry in China regarding quality, specification varieties, production capacity, sales volume and export volume.

Threaded Button Bits Thread  Type 　R22 R23 R25 R28 R32 R35 R38 TR28 TR32 TR35 　T38 T45 T51 　ST58 T60 ST68 EL68 EL60 Diameter of Bit 　28-165mm (R Threads) 　64-178mm (T Threads) 　89-152mm (Other Threads) Skirt Type 　Retrac, Reinforced, Standard Face  Design 　Flat Face , Drop Center Convex  Button Shape 　Concinal Semi Ballsitic Parabolic Full-Spherical , Hemispherical