PNEUMATIC ROTARY TOOL

摘要

A pneumatic rotary tool (51) has a housing (53) formed primarily from plastic so that the weight and price of the tool are substantially reduced. The air motor (119) is formed for economic assembly while permitting greater structural stability should the housing deflect under an impact. The tool includes a torque selector (85) which controls the amount of pressurized air allowed to enter the air motor, thereby controlling the torque output of the motor. The user may adjust the torque selector (85) to a number of set positions which correspond to discrete torque values. The tool additionally incorporates early and late stage exhaust ports, so that backpressure within the air motor does not slow motor rotation or decrease tool power.