CH Series Clutches

Designed for Heavy Duty
Clutch and Brake Applications

Type CH clutches are designed specifically for heavy duty clutch and brake applications, and can be air or hydraulically actuated. The friction disc packs are suitable for either wet or dry operation. Actuation is accomplished through internal shaft and clutch passages. When used as a wet clutch, coolant oil may be applied as a splash or spray or forced through the friction disc pack from an internal shaft passage. The clutch hub is bored and keyseated for shaft mounting. Torque is transferred from the disc pack to a splined drive ring.

  • Modified CH 1250
  • Typical Z-Drive equipped with a Logan CH 1250 (180,000 lb. in / 20,340 Nm) @ 150 psi. / 12.2 bar
  • View of the Deepwater Enterprise Drilling Rig, Equipped with (3) Logan CH Clutches in its Drawworks, Capable of Drilling up to 30,000 ft., in 8,500 ft. of Water.
  • A Cut Away View of a Typical 5,000 HP Continental Emsco, 3-Speed Electrohoist V Drawworks, which Uses Logan CH 1250, CH 1440, and CH 1640 Air Actuated Clutches – All Operating at 150 psi. / 10.2 bar
  • Logan CH/HPC Series Clutches are Used in Main Propulsion Gearboxes for Inland Marine or Ocean Going Vessels.
  • CH 1440 Clutch (270,000 lb. in. / 1,800 RPM)
  • CH Clutch Mounts Between Motor and Winch
  • Logan CH Clutches for Escort and Ship Assist Vessels
  • CH 1050 (140,000 lb. in. / 15,750 Nm)
  • Logan CH Series Clutches Installed on a Workboat Mooring Winch
  • Main Propulsion for High Speed, Medium and Heavy Duty Gear Drives
  • Harbor Tug Equipped with a Logan 600 Series Power Take-Off (PTO) Clutch Mounted to a Cat 3500 Series Diesel Engine.
  • Marine Towing and Mooring Winches
  • Typical Engine Room View Tugboat

Applications:

  • Marine Propulsion
  • Marine Mooring Winches
  • Mine Hoisting Equipment
  • Overland Mining Conveyors
  • Draw Works
  • Fan Drives

Advantages:

  • American Bureau of Shipping (ABS) Type Approval
  • Self-lubricating seals
  • Long-wearing components
  • Positive mechanical lock-up "come home" feature
  • Smooth engagement

CH Series and How they Work

CH SeriesPressurizing the cylinder with fluid or air forces the piston to clamp and lock the friction and separator discs, and release springs. Torque is transferred through the clutch to the drive cup. When pressure is lifted, the release springs take apart the separator discs and maintain a running clearance between separator and friction disc surfaces.


Specifications

Type CH clutches are available in seven sizes with torque ratings from 49,000 lb-in (5532 Nm) to 1,280,000 lb-in (144,000 Nm).

Maximum allowable pressure is 200 psi (13,8 bar)
for wet operation and 120 psi (8,3 bar) for dry operation.
Standard operating speeds are from 1 to 2200 RPM. Stronger release springs are available for disengagement at higher speeds.


Modified Standards
Higher torque ranges and actuation pressures are available to meet customer’s specific design requirements.

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