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Winches > Quattro

Quattro is a breakthrough in winch design patented by Harken. Evolving from the driven skirt sheaves of our large America's Cup winches, Quattro is a simple winch that offers four line speeds.

The Quattro was developed for the Melges 30. The boat required extremely fast winches to handle the large asymetrical spinnaker but also needed power to trim the genoa upwind. The usual answer would have been two winches, but high-performance boats can't tolerate the extra weight. The solution was to build a winch with two drum diameters. For fast trimming use the large-diameter lower skirt drum. For more power use the normal upper drum. Two speeds x two drums = four line speeds.

Self-tailing Quattro winches were developed for larger offshore boats that trim the spinnaker on the cabin house winches. They need speed for the chute, but power and self-tailing ability for the guy and for the halyards. The B45STRQ debuted on Numbers and has been very popular on the Corel 45s. The B44STQ was developed for the Farr" 40 One-Design.

All Quattro winches feature aluminum drums. The B45STRQ is a racing winch with lightweight PEEK^® bearings and an aluminum castle. The B40Q, 40STQ and B44STQ are based on standard winches. All three versions feature a race of ball bearings to support the vertical load of the drum.

Use For:

Control lines

B40STQ B44STQ

High-load-carrying gear pins are 17-4 PH stainless steel for maximum strength and durability Self-tailing arm is adjustable to 22 positions after the winch is mounted For more power use the upper drum Two speeds x two drums = lour line speeds Large lower drum for fast trimming

B40Q

B45STRQ

Part No.	Gear ratio		Power ratio				Fastener circle		Fasteners (FH)
	1	2	1	2	3	4	in	mm	in	mm
B40Q	1:1	6.1:1	3.5:1	21:1	6.7:1	40:1	47/16	112	5 x 1/4	5x6
B40STQ	2.2:1	6.1:1	3.5:1	21:1	6.7:1	40:1	47/16	112	5 x 1/4	5x6
B44STQ	2.5:1	8.2:1	7.3:1	23.3:1	13.8:1	44:1	51/16	128	5 x 5/16	5x8
B45STRQ	2.5:1	8.2:1	7.3:1	23.3:1	13.8:1	44:1	51/16	128	5 x 5/16	5x8

Part No.

Drum

Base

Height

Weight

Line

Line entry height (LE)

Lower

Upper

Min

Max

Lower

Upper

in

mm

in

mm

in

mm

in

mm

Ib

kg

in

mm

in

mm

in

mm

in

mm

B40Q

511/16

145

33/16

80

75/16

185

57/16

138

9.6

4.36

—

—

—

—

5/8

15

23/4

70

B40STQ

511/16

145

33/16

80

75/16

185

57/16

138

13.05

5.92

5/16

8

1/2

12

5/8

15

23/4

70

B44STQ

67/8

174

35/8

92

87/16

214

81/8

206

19.5

8.84

5/16

8

9/16

14

3/4

20

33/16

80

B45STRQ

67/8

174

35/8

92

87/16

214

81/8

206

13.8

6.27

1/4

6

9/16

14

3/4

20

33/16

80

Use Chart | Standart | One-, Two-, & Three Speed | Self-Tailing | Three-Speed Self-Tailing | Wide-Body Self-Tailing | Stainless Steel | Powered | Electric | Hydraulic | Hydraulic Power Units | Control Boxes Circuit Breakers, & Switches | Racing Features | Quattro | Two-Speed Self-Tailing Racing | Three-Speed & Three- Speed Self-Tailing Racing | Wide-Body Three-Speed Top-Cleating Racing | Large Wide-Body Multi- Speed Racing | Large Wide-Body Self- Tailing Racing | Pedestals & Accessories | Drive Components | 2003 AC Winch Systems | SeepdGrip Handles | Ball Bearing Handles | Service Kits