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Underdeck Furling System — 5 mm Luff Wire Underdeck Furling System — 5 mm Luff Wire Underdeck Furling System — 5 mm Luff Wire
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Small Boat Underdeck

Underdeck Furling System — 5 mm Luff Wire

Part No. 493
$1,622.25  Not available on-line. Please contact your Harken dealer.
Drum Ø (mm)102 mm
Drum Ø (in)4 in
Maximum luff wire Ø (mm)5 mm
Maximum luff wire Ø (in)3/16 in
Maximum working load (kg)907 kg
Maximum working load (lb)2000 lb

Small Boat underdeck furling units are ideal for sportboats and daysailers from 4.8 m to 9 m (16 to 30 ft). The drum is located beneath the deck, lowering the tack height for maximized sail area. An optional hoistable ball bearing halyard swivel can be installed on your headstay so you can raise or lower the sail without removing the headstay. Swivels are independent of the headstay, allowing you to tension the luff separately from the mast rake.

Pin-to-pin length (mm)188 mm
Pin-to-pin length (in)7 3/8 in
Drum Ø (mm)102 mm
Drum Ø (in)4 in
Maximum line Ø (mm)5 mm
Maximum line Ø (in)3/16 in
Jaw width (mm)10 mm
Jaw width (in)3/8 in
Maximum luff wire Ø (mm)5 mm
Maximum luff wire Ø (in)3/16 in
Clevis pin Ø (mm)8 mm
Clevis pin Ø (in)5/16 in
Weight (g)1433 g
Weight (oz)50.5 oz
Maximum working load (kg)907 kg
Maximum working load (lb)2000 lb
FootnoteIncludes drum and upper swivel. Does not include hoistable swivel. 

DO NOT use Harken Equipment for Human suspension.

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