ROTARY ACTUATOR

Buy Rotary Actuator

A rotary is a device that is used to alternate the rotated position of an object. Like the human wrist, a enables the rotation of an object. However, unlike the human wrist a is available in a wide variety of models with different sizes, torques and rotation angles. The energy for the rotation is delivered by pneumatic pressure. The converts the air pressure from a linear motion to a rotating motion.

It is a device mounted on a that, in response to a signal, automatically moves the to the desired position using an outside power source. The power source may be pneumatic, electrical, or hydraulic. A manual , by definition, is a that requires no outside power source. Handwheels, chainwheels, and levers are examples of manual

Hydraulic use a pressurized, incompressible fluid to rotate mechanical components. They are faster and more powerful than pneumatic because the high pressures used in hydraulic systems produce greater torque. Hydraulic use two types of rotational elements: circular shafts and tables. Typically, circular shafts include a keyway while tables include a bolt pattern for mounting other components. Single-shaft devices provide an output on only one side of the . Double-shaft devices provide outputs on both sides of the . To convert linear motion into shaft rotation, helical spline teeth on the shaft engage matching splines on the inside diameter of a piston. As hydraulic pressure is applied, the piston is displaced axially within the housing and the splines cause the shaft to rotate. When a control is closed, hydraulic fluid is trapped inside the housing and the shaft is locked in place. Single-piston devices drive a rack that rotates the pinion. Double-piston and four-piston devices drive racks on both sides of the pinion. Single-chamber and double-chamber rotary vanes that are actuated by pressurized air are also available.

Pneumatic base slides have an integral pneumatic cylinder and high-precision recirculating ball bearings. The end stops are adjustable, and hydraulic dampers are used at the end of travel. The aluminum body and end blocks feature threaded mounting holes and precision holes for accepting location dowels. The end blocks are bolted onto the shafts to keep them from moving making this makes a ridged precision slide and repeatability is an impressive 0.01in.

The slides can be ordered with linear ball bearings or polycarbonate composite bearings are also available; end positions are adjustable and may be sensed using proximity sensors to signal the end positions.

Electric linear provide linear motion via a motor-driven ball screw, lead screw, or acme screw assembly. The load is attached to the end of the screw and is unsupported. Acme screws are lead screws with matching threads on both the screw and nut. Ball screws are lead screw and ball nut combinations that enable the balls in the nut to circulate when the is in motion. Electric linear with belt drives, geared drives, and direct drives are also available. Belt drives connect the motor to the with a belt. Geared drives connect the motor to the with a set of gears. With direct drives, the motor is connected directly to the electric linear . In terms of performance, important specifications include stroke, rated force or load, system backlash, and rated speed. Stroke is the maximum distance that the shaft travels from a fully extended position to a fully retracted position. Backlash is the position error due to directional change. The maximum rated speed is typically a low or no load amount.