STH050 Hydraulic Rail Clamp

The STH Rail Clamps are robust and compact.  This innovative design incorporates an integrated power unit and is truck mounted.  Flange and Sill-Beam mounting options are also available.  These rail clamps are spring-set and hydraulic released and are manufactured to the highest quality materials and engineered specifications.


    •  – free-floating / self-centering 
       – horizontal float standard 
       – vertical float available 
       – guide rollers optional
    •  – fail-safe (standard)
       – flow control standard (for delayed set) 
       – limit switch standard (for release interlock)
    •  – steel & ductile iron 
       – serrated shoes (static) 
       – smooth shoes (dynamic) 
       – stainless steel pins standard
    •  – single port or flow through actuator
       – 12,000 LB [50kN] to 150,000 LB [667kN]
          (see table)
    •  SHOES
    •   – hardened serrated tool steel for stactic service
        – hardened smooth tool steel for dynamic service
    •  OPTIONS
    •  – special alloys, coatings, controls and custom
       – mountings available
       – vertical & rocker
  •  – application and selection assistance available


STH050 Hydraulic Rail Clamp

STH050 – Spring set and hydraulic release truck mounted rail clamp

Holding Force: 50,000 Lbf per Rail Clamp
(generally as per attached print STH-01-4)
* For Standard and Custom Sized Rail
* Rail head clamp, shoe acting on each side of the rail
* Lubrication points, provided in levers
* c/w Integrated HPU Part # HL283SD
415VAC/3Ph/50Hz Hydraulic Motor

Rail Clamp Selection
The rail clamp must be chosen according to exposed surface areas of structures and maximum wind speed in addition to a suitable safety factor. For more complicated structures please consult Kor-Pak Corporation and we will calculate and recommend the correct rail-clamp for your application.

Rail Clamps



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