GM-L-27 28型锚杆钎头是为澳大利亚研制的新产品,是煤矿矿井内在WOMBATMKIV锚杆支护钻车上用来钻锚杆孔的刃具。一、技术参数钎头直径 27、28mm 连接螺纹 1/2in 前角 -3°后角 15°钎头刃角 127°锥体隙角 3°二、工作条件岩石硬度 f<8 工作气压 5×10~5～6.2×10~5Pa 工作水压 1.5×10~5～1.23×10~6Pa 传递扭矩 216.5N·m GM-L-27 28 Anchor Drill Bit is a new product developed for Australia. It is the cutting tool used to drill anchor hole in WOMBATMKIV bolt support drill in coal mine. First, the technical parameters Drill diameter 27,28 mm Connecting thread 1 / 2in rake angle -3 ° Rear angle 15 ° Bit angle 127 ° cone angle 3 ° Second, the working conditions Rock hardness f <8 Working pressure 5 × 10 ~ 5 ~ 6.2 × 10 ~ 5Pa Working pressure 1.5 × 10 ~ 5 ~ 1.23 × 10 ~ 6Pa Transmission torque 216.5N · m