Piston-rod brake needs no air pressure

Sept. 18, 2003
The motion-control industry's first round-line pneumatic rod lock prevents piston rods from moving when air pressure is lost.

It can help hold stationary loads at machine shutdown and prevent tool drift. The Rod Lock from Bimba Manufacturing Co., Monee, Ill. (www.bimba.com), uses a cam-and-pin design to activate the brake. When there is compressed air, the piston presses a spring down and dowel pins follow a cam to their open position. As the pins move to the open position, they also open a clamp to let the rod travel freely. When air pressure is lost, the spring forces the piston up, the dowel pins follow the cam to the closed position, and the clamp closes.

The Rod Lock holds up to 40 lb on a 3/4-in. bore and up to 700 lb in a 3-in. bore. Maximum operating pressure is 125 psi, and it takes at least 50 psi to release the clamp. It operates in temperatures ranging from -20 to 200°F. Expected service life is 5 million cylinder actuations and 1 million lock actuations.


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.


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!