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-6 Integral Backstay Cylinder — 25 mm Bore, 345 mm Stroke -6 Integral Backstay Cylinder — 25 mm Bore, 345 mm Stroke
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-6 Integral Backstay Cylinder — 25 mm Bore, 345 mm Stroke

Part No. HCI025110345BCC.NG
Maximum wire Ø (mm)5.5 mm
Gap/pin Ø (mm)11.1 mm

Harken’s integral hydraulic backstay adjuster provides the power to optimize sail shape quickly. The cylinder features a built-in, double-acting pump that delivers oil when the handle is both pushed and pulled. This moves oil through the system twice as fast as single-acting pumps on other integrals.

Assemblies include a hardcoat-anodized aluminum cylinder and pump, valve, and stainless pump handle with three attachment options: pin installs handle permanently; O-ring secures handle in socket, but is not permanent; nonlocking handle installs without O-ring and roll pin. All pins and plugs are stainless steel. Cylinders include a clevis on both ends. Standard eye-jaw toggles fit all Harken® cylinders.

The pressure release knob turns clockwise to close and pump, counterclockwise to release. When closing the pump, the knob cannot be over-tightened by hand, preventing damage to the valve. Release speed depends on how far open the knob is turned. Pressure relief is factory set to prevent crew from over-tensioning the backstay.

- Size-6 
Maximum wire Ø (mm)5.5 mm
Stroke (mm)343 mm
Pin center length (closed) (mm)762 mm
Weight (kg)3.37 kg
Gap/pin Ø (mm)11.1 mm
Pull force @ 1000 psi/69 bar (kg)564 kg
Pull force @ 2000 psi/138 bar (kg)1128 kg
Pull force @ 3000 psi/207 bar (kg)1692 kg
Breaking load (kg)3175 kg
Drawing - DWG: (open/save)
Drawing - PDF:  HYCI025110345.PDF.pdf (open/save)
3D drawing - IGS: (open/save)

DO NOT use Harken equipment for human suspension unless product is specifically certified and labeled for such use.

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