Page 104 - Pneumatic ebook (2)_draft 13 sept 2021

Rotary actuators

b. Rack and pinion
Rotary Actuators
are used for applications required angular This actuator is also
motion. This type of actuator produces high referred to as limited rotation
torque output and have a limited rotary cylinders, of the single or multiple,
movement. Standard rotations are 90○ , 180 ○ bidirectional piston are used for turning,
, and 270 ○ . Rotary actuators are mainly positioning, steering, opening and
available in three designs which are ram type, closing, swinging, or any other mechanical
rack and pinion and air motor. function involving restricted rotation.

c. Air motor
a. Ram type Air motors are widely used in
Compressed air enters to industrial and automotive.
air hole which is Example: Used as a screwdriver,
connected to the output drilling machine and grinding
shaft. The air openings is machine.
protected from leakage by Air motor produces a continuous
using protective rubber or output torque to move the shaft.
elastomeric coating.

INTRODUCTION TO PNEUMATIC SYSTEM 47