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Harken Self-Contained Sheaves

Harken Self-Contained Sheaves

Self-contained sheaves are designed for sailors to use in custom applications.

The Micro, Bullet and Big Bullet sheaves are Delrin with Delrin ball bearings. They are scored for rope. 16mm AirBlock sheaves are Delrin and feature stainless steel ball bearings that ride in a grooved race. Midrange sheaves come in either Delrin or aluminum for wire.

Two 160 sheaves make up the 161 dual sheave universal lead. Use this sheave to divert a line that must turn in either direction. The bores of the sheaves are 1 1/2" (38 mm) apart, center to center.

Wire sheaves ride on high-load composite bearings. They are Hardkote-anodized aluminum with Teflon impregnation.

Ball bearings in the 1 1/2" (38mm) and 2" (51mm) sheaves minimize friction. The 1" (25mm) wire sheave uses low-friction washers for this purpose.

Use ESP sheaves to handle high static loads from halyards and reef lines. Sheaves are carbon-black Delrin for UV protection, and htey durn on stainless steel spacers. Contained sideload ball bearings allow sheaves to spin freely when loads are released. Sheaves require a sideplate for the sideload balls to roll on.

Part # Diameter Bore Width Max Rope Diameter Max Wire Diameter Safe Working Load Block Suited
mm in mm in mm in mm in mm in kg lb
H160 29 1 1/8 6.27 1/4 12 1/2 8 5/16 - - 136 300 Bullet
H161 29 1 1/8 6.27 1/4 22 7/8 8 5/16 - - 136 300 Bullet ???
H265 38 1 1/2 6.27 1/4 14 9/16 10 3/8 - - 136 300 Big Bullet
H277 22 7/8 4.75 3/16 10 10/32 6 1/4 - - 91 200 Micro
H303 25 1 4.75 3/16 7 9/32 4 5/32 2 3/32 454 1000 Wire
H307 38 1 1/2 6.27 1/4 10 13/32 5 3/16 3 1/8 680 1500 Wire
H311 51 2 8.10 5/16 10 13/32 6 1/4 5 3/16 907 2000 Wire
H415 16 5/8 4.75 3/16 8 5/16 5 3/16 - - 113 250 16mm
H1533 51 2 6.27 1/4 22 7/8 16 5/8 - - 227 500 Small Midrange
H1534 51 2 6.27 1/4 22 7/8 16 5/8 5 3/16 227 500 Small Midrange, Aluminum
H6062 40 1 9/16 8.10 5/16 17 11/16 12 1/2 - - 567 1250 ESP
H6063 57 2 1/4 10.00 3/8 21 13/16 16 5/8 - - 1134 2500 ESP
H6064 75 2 15/16 10.00 3/8 22 7/8 19 3/4 - - 1588 3500 ESP


H1533 51mm Small Midrange Sheave Price: $12.50 H1534 51mm Aluminum Small Midrange Sheave Price: $46.38
H160 29mm Bullet Sheave Price: $10.03 H161 29mm Double Bullet Sheave Lead Price: $25.34
H265 38mm Big Bullet Sheave Price: $10.96 H277 22mm Micro Sheave Price: $4.14
H303 25mm Wire Sheave Price: $21.12 H307 38mm Wire Sheave Price: $33.04
H311 51mm Wire Sheave Price: $52.49 H415 16mm Airblock Sheave Price: $9.06
H6062 40mm ESP Sheave Price: $15.88 H6063 57mm ESP Sheave Price: $18.83
H6064 75mm ESP Sheave Price: $27.06


Harken Big Boat Sheaves

Harken Big Boat Sheaves

Big Boat sheaves are available for special applications as well as for replacement sheaves in Big Boat blocks. Made of Hardkote-anodized, Teflon-impregnated 6061-T6 aluminum, these sheaves feature Torlon rollers to carry high radial loads and carbon-black Delrin balls to support sideloads and provide UV protection. Select sheaves based on load-carrying capacity. Installation requires clamping or securing the inner race.

Part # Diameter Bore Width Max Rope Diameter Fasteners Fastener Circle Safe Working Load Breaking Strength
mm in mm in mm in mm in mm in mm in kg lb kg lb
H500 76 3 10.00 3/8 22 7/8 14 9/16 10 3/8 - - 2245 4950 4490 9900
H518 114 4 1/2 19.10 3/4 25 1 19 3/4 10 3/8 35 1 3/8 3401 7500 6803 15000
H519 140 5 1/2 22.28 7/8 29 1 1/8 22 7/8 10 3/8 41 1 5/8 4127 9100 8254 18200
H520 178 7 38.00 1 1/2 29 1 1/8 22 7/8 12 1/2 64 2 1/2 6349 14000 12698 28000
H550 102 4 10.00 3/8 22 7/8 14 9/16 10 3/8 - - 2245 4950 4490 9900
H603 76 3 10.00 3/8 40 1 9/16 14 9/16 10 3/8 - - 2245 4950 4490 9900
H640 64 2 1/2 8.10 5/16 32 1 1/4 12 7/16 8 5/16 - - 907 2000 1814 4000
H657 114 4 1/2 19.10 3/4 41 1 5/8 19 3/4 10 3/8 35 1 3/8 6736 14850 13472 29700
H1539 64 2 1/2 8.10 5/16 35 1 3/8 12 7/16 8 5/16 - - 1361 3000 2721 6000


H500 76mm Big Boat Torlon Roller Sheave Price: $169.14 H518 114mm Big Boat Torlon Roller Sheave Price: $414.79
H519 140mm Big Boat Torlon Roller Sheave Price: $536.62 H520 178mm Big Boat Torlon Roller Sheave Price: $877.05
H550 102mm Big Boat Torlon Roller Sheave Price: $260.13 H603 76mm Big Boat Torlon Roller Sheave Price: $277.46
H640 64mm Big Boat Torlon Roller Sheave Price: $148.72 H657 114mm Big Boat Torlon Roller Sheave Price: $496.06


Harken High-Load Sheaves

Harken High-Load Sheaves

High-Load Sheaves are offered as replacement parts or for use in special applications. Their bearing system combines sideload-carrying balls with a Teflon composite bushing to carry radial loads. While not as free-rolling as the standard Harken ball/roller bearing system, this compact bearing system is extremely durable and perfect for carrying high loads in a restricted diameter. Installation requires clamping or securing inner race.

Ideal for use on masts, booms, deck organizers, and through-the-transom running backstays.

Part # Diameter Bore Width Max Rope Diameter Max Wire Diameter Safe Working Load Breaking Strength *
mm in mm in mm in mm in mm in kg lb kg lb
H712 102 4 17.60 11/16 22 7/8 12 1/2 8 5/16 5443 12000 14515 32000
H714 127 5 22.28 7/8 25 1 16 5/8 8 5/16 6804 15000 23133 51000
H716 152 6 22.28 7/8 25 1 16 5/8 10 3/8 8165 18000 23133 51000
H727 57 2 1/4 10.00 3/8 22 7/8 12 1/2 8 5/16 2245 4950 4491 9900
H754 76 3 12.70 1/2 22 7/8 12 1/2 8 5/16 3175 7000 7484 16500
H1734 203 8 31.70 1 1/4 35 1 3/8 22 7/8 12 1/2 16783 37000 45360 100000

* Breaking Strength based on use of solid 304 stainless shaft.



H1734 203mm High-Load Sheave Price: $825.75 H712 102mm High-Load Sheave Price: $299.38
H714 127mm High-Load Sheave Price: $355.74 H716 152mm High-Load Sheave Price: $399.21
H727 57mm High-Load Sheave Price: $115.37 H754 76mm High-Load Sheave Price: $136.05


Harken Narrow Halyard & Steering Sheaves

Harken Narrow Halyard & Steering Sheaves

Narrow High-Load Sheaves in mastheads improve sail handling, speed sail changes, and allow the use of smaller, lighter halyard winches. Used in steering systems, these sheaves return "feel" to wheel-steered boats.

These sheaves combine sideload-carrying balls with a Teflon composite bushing for radial loads, and are made of 6061-T6 aluminum.

Part # Diameter Bore Width Max Rope Diameter Max Wire Diameter Safe Working Load Breaking Strength *
mm in mm in mm in mm in mm in kg lb kg lb
H691 76 3 12.7 1/2 16 5/8 10 3/8 5 3/16 1814 4000 7484 16500
H692 102 4 12.7 1/2 19 3/4 7/16 12 8 5/16 3742 8250 7484 16500
H693 127 5 19.10 3/4 19 3./4 12 7/16 8 5/16 5443 12000 16828 37100
H694 152 6 19.10 3/4 22 7/8 12 1/2 10 3/8 7258 16000 16828 37100
H695 178 7 25.42 1 25 1 14 9/16 12 1/2 9526 21000 29937 66000

* Breaking Strength based on use of solid 304 stainless shafts.



H691 76mm Narrow Halyard & Steering Sheave Price: $124.39 H692 102mm Narrow Halyard & Steering Sheave Price: $288.55
H693 127mm Narrow Halyard & Steering Sheave Price: $332.02 H694 152mm Narrow Halyard & Steering Sheave Price: $375.72
H695 178mm Narrow Halyard & Steering Sheave Price: $490.03

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