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1923 Mclean Avenue
Port Coquitlam, BC
V3C 1N1, Canada
Phone: (+1) 604-941-3180
Fax: (+1) 604-941-3185
Toll Free: 1-800-661-1722
(In North America)

Rail Clamps - Retractable

Introducing a Safer and Better Way for Rail Clamps to Work

Are your rail clamps still travelling down at rail level, sitting on guide rollers or fixed guides that are constantly wearing, resulting in shoe damage and impact damage to the brake?

  • Free your installation now and increase reliability and safety while lowering maintenance costs!
  • Now there's a simple single cylinder solution that lifts all the critical components completely free of the rail for machine travel.  Shoes and levers are tucked up out of the way inside a rugged enclosure.
  • Brelx rail clamps eliminate all hardened guide means and rollers and yet still allow +/-30 mm horizontal and +/-25 vertical rail deviation or float (more is available upon request).


BRELX Rail Clamps are innovatively designed to release and retract completely from the rail head and there are no mechanical guiding means at rail level.  There is no wear and tear to guide means, brake shoes as well as rail head itself.  Also the effect of the vibrations on the rail clamp mechanism during crane travel is minimized.

When in set position, they provide a designed holding force (capacity) with a patent pending spring force change compensating feature.




The solenoid valve SV1 is normally open when de-energized to allow setting of the rail clamp when control power is lost. The hydraulic oil can flow from the cylinder to tank under spring pressure. To release the rail clamp, the solenoid valve is energized allowing the hydraulic pump flow to be blocked to the tank and sent to the hydraulic cylinder, thus compressing the rail clamp springs, opening the clamp jaws and retracting the rail clamp.



  • Rail Clamp jaws retract completely above the rail head when in a released position.
  • There are no mechanical guiding means at rail level at any speed.
  • No lubrication points required… ever
  • Rail clamp shoes protected during crane traversing
  • Clamp mechanism parks in a central position when fully retracted and locates on rail head when lowering or setting
  • Vertical guiding fork is custom machined in accordance to a rail head profile for precise shoe / rail head engagement
  • Controlled setting time by a flow control valve (adjustable from 2 to 30 sec).
  • Provisions to allow caging of rail clamps in open position (released)
  • Mechanism compensates spring force change – patent pending
  • A single ram-type cylinder to carry out spring release compression, shoe retraction and mechanism lifting.
  • The ram cylinder is top mounted with no rod connections and can be easily removed for maintenance or replacement in minutes, by undoing four bolts.
  • Clamp release, positioning on the rail for proper shoe to rail engagement and reserve stroke monitored by proximity switches.
  • Modular design for clamping mechanism to be under same enclosure with the power unit.
  • Stainless Steel removable cover comes with the inspection doors located on both sides of a rail clamp.



Rail Clamp jaws fully released and retracted above the rail means that there are no mechanical guiding means at rail level at any speed which is a paramount for high speed, modern cranes.

Serrated shoes are fully protected from hitting the sides of the rails - contributes to less wear and tear.

A mechanism is compensating for a potential spring force loss due to rail width variation, shoe wear or mechanism out of adjustment.



Need Help? Our Support team is here

Our knowledgeable support team is readily available to assist you with selection of our reliable Storm Brake products and services for new and used applications. We are commited to providing the best start-to-finish assistance for new and existing customers and to advise on product solutions. Our qualified Service Technicians are available for quick service and support.