BK20 Impact Wrench, BK20 gas trigger 
 BK20 pneumatic wrenches, BK40 pneumatic wrench, pneumatic wrench 
 BK20 pneumatic wrench, pneumatic wrench is safe explosion-proof, torque, light weight, small size, high efficiency, simple structure, easy maintenance and a series of features. Fluctuations in coal mine air pressure to meet the case of large output and stable speed requirements, can be used for U type steel support bracket nut and bolt tightening and removal of the stirring resin bolt nut assembly and disassembly of other mechanical and electrical equipment, can improve U bolt bracket steel bracket and performance, supporting quality assurance. The series can be widely used in automotive air trigger, shipbuilding, petrochemical, rolling stock, construction and other industries. 20 nuts on the side of size, 

 Pressure MPa Rated torque N ? m idling speed r / min idling \ Air consumption m3/min noise dB (A) apothem mm Square tube size mm diameter mm Weight kg 
 BK20 0.4-0.63 ≥ 490 ≥ 6000 ≤ 1.2 ≤ 118 37 19 × 19 16 4.2 
 BK30 0.4-0.63 ≥ 882 ≥ 5500 ≤ 2.4 ≤ 118 42 19 × 19 16 5.8 
 BK42 0.4-0.63 2000 ≥ 5000 ≤ 2.5 ≤ 118 55 25.4 × 25.4 16 9.5 
 BK20 type mine gas trigger for M18 ~ M20 screw, BK30 type mine gas trigger for M24 ~ M30 screw, BK42 type mine gas trigger for M27 ~ M42 screw