LH T76 self-drilling hollow Grouting bolt is made of thick-walled seamless steel pipe material, surface is continuous international standard ladder-shaped threads, used with the excellent workmanship of alloy bits and coupling, in addition to all the features and effects of conventional self-drilling anchor Rod, also are widely used in collapse of tunnel construction.
Characteristics and parameters:
1,made of high quality thick-walled seamless steel tube material, wall thickness is 10MM ~ 15mm
2, surface is continuous international standard ladder-shape threads, thread pitch 12.7mm, thread depth 3mm, the thread can withstand torque transmission, used with the corresponding anchor drilling machine ,depth can be up to 25m.
3, after perfectly take shape and heat treatment, bearing capacity will be higher, tensile strength will be up to 1400Kn ~ 2000Kn.