End-of-stroke, mechanical locking cylinders provide positive mechanical locking when cylinders are fully extended, fully retracted, or both. An internal mechanical device locks the load into position, and it and remains locked until line pressure is applied. It also remains locked in the event of piston-seal failure or the absence of line pressure. Only applied hydraulic or pneumatic pressure will release the lock mechanism. Thus, line pressure can be removed in applications that must hold loads in position for long periods of time.
The lock is available on Milwaukee Series A and LH cylinders in all mounting styles and in bore sizes from 1.5 to 6 in. They’re suited for cylinder applications such as presses, door openers, air hoists and many others, whenever a positive lock is desired to prevent drifting, or for loads that are to be held for extensive periods without line pressure.
Maximum holding capacity ranges from 100 to 2,500 lb and they operate at temperatures from -20° to 200° F. Operating pressures are from 750 to 1,500 psi for LH cylinders, and 750 psi for A versions.