Impact screw-driver has hammer housing and cap at each end of main body, handle with inlet and outlet ducts, motor with shaft, reverse valve andlever and regulator lever

摘要

The front end of the impact screw driver's body (1) has a hammer housing, while the rear end has a cap. The underneath part of the body forms a handle (6).with inlet and outlet ducts (7,8). The body contains a compressed air motor (2) the rear of which has a rear disc(20).for holding a motor shaft. A reverse valve (19) is between the rear disc and the body cap; and a regulator valve (15) is for air intake. The reverse valve is switched by means of a reverse lever (13) on the outer periphery of the cap. The regulator lever (17) is engaged in several gears.