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Hydraulic Cylinders — Rod-Locking Device

The Hänchen Ratio-Clamp® is a positive rod clamping safety device. The Ratio-Clamp is unlocked by hydraulic pressure. In the event of an electrical/hydraulic power loss, the potential energy of the internal Bellville washers load a conical piston, driving it over the friction fingers resulting in securing the load. “A true self contained safety clamp.” Boasting a retention force of up to 101,000 lbf., the clamp hydraulically holds the piston rod in whatever position it is in at that particular moment without having to generate extra power (no extra energy) for an unlimited period of time. The clamping device Ratio-Clamp is approved by the German Technical Inspection Agency (TÜV). Special development of Custom solutions (larger rod diameters, intermediate size, greater clamping forces) pose no problem for the Hänchen specialists. Hänchen is particularly proud of its RC-H model. Following a request from the Health and Safety Centre of the Employers’ Liability Association (BGZ iron and metal section III, Düsseldorf), Hänchen developed the new safety clamping hydraulic Ratio-Clamp under extreme conditions for use with hydraulic presses and injection molding machines. The Hänchen Rod Clamping Device meets the OSHA CFR 1910.217(d)(9)(iv) and ANSI B11.1-2001 standards for preventing the movement of the dies when adjustments and repairs are preformed or when humans are under the dies. This is an excellent alternative to safety blocks as it allows the flexibility to hold the die anywhere in its stroke and also immediately stops and holds the dies for an emergency or power loss.

Hänchen is a supplier and hydraulic cylinder manufacturer for various applications including construction, mechanical, technological, and industrial.

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