216
TP52 © Max Ranchi
Air winch 250 
aboard a TP52
Air winch 250
Air winch 550
Air winch 300
Air winch 600
Air Winches
Harken Air winches feature interchangeable gearing sets that give crews 
the flexibility to create a perfect blend of speed and power for each day’s 
weather and crew configuration. The winches, which feature a nearly empty 
middle to reduce weight, are designed to be used on SailGP foiling cats, 
IMOCA 60s, AC75s, TP52s and other large Grand Prix boats. 
The Air winch’s hollow middle is a first for sailing winches, as are the 
changeable gear kits. All Harken Air winch models feature interchangeable 
first-speed and second-speed options. The wide-diameter drums allow 
fewer wraps, faster trimming, and faster easing. Standard and counter-
rotating versions are available. The winches have a low-profile design. 
Available in five models: 250, 300, 550, 600 and 900.
The 250 and 300 models are designed for boats up to 17 m (56'). The 
550 and 600 models are designed for boats up to 24.4 m (80') and the 
900 is made for boats over 24.4 m (80'). The 250 and 550 feature a high-
performance ceramic coated white drum. The 300 and 600 versions of the 
winch feature an anodized aluminum drum, and the 900 drum is made of 
carbon fiber and anodized aluminum.
The 250 and 550 are designed for new builds and are mounted in a unique 
way: the base of the winch is molded into the deck by the boatbuilder. The 
300, 600 and 900 have a standard winch base that can be mounted on 
either new builds or retrofits.  
The 250 and 550 Air winches are exclusively pedestal or handle driven. 
The rest of the models may be driven by pedestal, handle, or powered by 
electric or hydraulic motor. 
Product not stocked. Contact Harken to request quote and lead time.
Air winch 900
Part
No.
Ø
Height
Weight
Line Ø
Line entry
height
Fastener
circle
Fasteners
Drum
Base
Min
Max
in
mm
in
mm
in
mm
lb
kg
in
mm
in
mm
in
mm
in
mm
mm
 Air winch 250 
 7 7/8 
 200 
 10 21/32 
 271 
 5 3/4 
 146 
 16.1 
 7.3 
 3/16 
 5 
 3/8 
 10 
 1 15/16 
 50 
 
 
 
 Air winch 300 
 7 7/8 
 200 
 10 21/32 
 271 
 6 
 153 
 17.0 
 7.7 
 3/16 
 5 
 3/8 
 10 
 2 1/4 
 57 
 8 9/32 
 210 
 5 x M8 
 Air winch 550  11 13/16  300 
 14 15/16 
 380 
 6 7/8 
 174 
 27.3 
 12.4 
 1/4 
 6 
 1/2 
 12 
 2 7/16 
 61 
 
 
 
 Air winch 600  11 13/16  300 
 14 15/16 
 380 
 7 3/16 
 182 
 32.6 
 14.8 
 1/4 
 6 
 1/2 
 12 
 2 3/4 
 69 
 12 13/16 
 325 
 7 x M10 
 Air winch 900 
 14 3/8 
 365 
 18 1/8 
 460 
 10 1/8 
 257 
 70.6 
 32 
 3/8 
 10 
 7/8 
 22 
 3 5/8 
 92 
 16 7/16 
 417 
 10 x M12 
Part
No.
Gear ratio
Power ratio
1
2
3
1
2
3
 Air winch 250 
 1.34:1 
 6.40:1 
 25.42.1 
 3.42:1 
 16.27:1 
 64.57:1 
 Air winch 300 
 1.34:1 
 6.40:1 
 25.42.1 
 3.42:1 
 16.27:1 
 64.57:1 
 Air winch 550 
 1.30:1 
 10.58:1 
 47.98:1 
 2.21:1 
 17.92:1 
 81.25:1 
 Air winch 600 
 1.30:1 
 10.58:1 
 47.98:1 
 2.21:1 
 17.92:1 
 81.25:1 
 Air winch 900 
 3.12:1 
 13.11:1 
 67.17:1 
 4.34:1 
 18.25:1 
 93.48:1 

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