Scanning For Ideas: Shaped Pistons Let Air Cylinder Move Smoothly

March 6, 2008
Most air cylinders are prone to wear and contamination, don’t withstand extreme temperatures, and generate significant friction.

Edited by Stephen J. Mraz

The Airpel-AB single-acting (air-extend) pneumatic drivers from Airpot Corp., Norwalk, Conn. (airpot.com), overcome these limitations with a specially shaped steel piston fitted to a borosilicate glass cylinder. Putting pressurized air into the cylinder creates an air-bearing airflow effect around the piston. So the same air that drives the cylinder generates a stiff cushion of air that supports the piston around its edge, preventing contact with the cylinder wall and reducing friction without lubricants. A low-friction ball joint connects the rod to actuator, so no output force is lost to friction.

The AB line is offered in four bore diameters and 10 strokes, and can provide driving or supporting forces ranging from 2 gm to 58 kg at pressures starting at 5 psi. They operate in temperatures from –20 to 90°C. Because there is little friction or wear, the manufacturer guarantees their AB air cylinder will outlast any piece of equipment in which it is installed.

Sponsored Recommendations

Pumps Push the Boundaries of Low Temperature Technology

June 14, 2024
As an integral part of cryotechnology, KNF pumps facilitate scientific advances in cryostats, allowing them to push temperature boundaries and approach absolute zero.

The entire spectrum of drive technology

June 5, 2024
Read exciting stories about all aspects of maxon drive technology in our magazine.

MONITORING RELAYS — TYPES AND APPLICATIONS

May 15, 2024
Production equipment is expensive and needs to be protected against input abnormalities such as voltage, current, frequency, and phase to stay online and in operation for the ...

Solenoid Valve Mechanics: Understanding Force Balance Equations

May 13, 2024
When evaluating a solenoid valve for a particular application, it is important to ensure that the valve can both remain in state and transition between its de-energized and fully...

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!