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Q5 Quintessential, Yachting Developments © Chris Lewis
Powerful performance packed into a compact, slim profile 
makes our hydraulic headsail furlers the ultimate in push-
button sail control. Perfect for cruisers and performance 
cruisers, these free-rolling systems fit wire sizes from 
11 - 25 mm (7/16" - 1"); rod from -22 to -115 or equivalent
fiber stays. Parts and service are available around the world.
Low-friction efficiency for easy furling 
and reefing
•  Multiple rows of Torlon
® ball bearings in high-load 
areas minimize friction. 
•  Stacked bearing races evenly distribute radial and 
thrust loads; halyard swivel turns freely under load.
MKIV HYDRAULIC JIB REEFING & FURLING
DO NOT use Harken equipment for human suspension unless product is specifically certified and labeled for such use.
Foil joints
Standard transmission reduces mechanical 
friction and pressure loss
•  Engages/disengages the motor’s powered 
and manual gear drive for efficient operation.
•  Worm gear drive prevents backwinding; 
unloads hydraulic motor when reefed.
High-strength, lightweight
•  Hardcoat-anodized, UV-stabilized aluminum torque 
tube, motor, and gear housing.
•  Aerodynamic, clear-anodized aluminum Air foils 
handle extreme reefing loads.
•  Triple-interlock foil joints withstand years of torque 
loading: foil connectors geometric shape interlocks 
with foil; secures with syringe-injected adhesive; 
screws provide final lock.

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