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Harken 57 mm and 75 mm Carbo Ratchet Blocks

Harken Blocks

Harken 57mm and 75mm Carbo Ratchet Blocks

Carbo Ratchets allow sailors to hand-hold loaded lines and offer balance between holding power and controlled easing.  Nylon resin sideplates are densely packed with long-glass fibers for a compact block with a high strength-to-weight ratio. Machined aluminum sheaves are Hardkote anodized for strength and corrosion resistance. Eight facets hold line securely. Ball bearings, sheave, and sideplates are UV-stabilized with carbon black for maximum protection.

The 57 mm and 75 mm switchable ratchets provide precise on/off control with accessible, easy-to-operate on/off switches on both sides of the block.  For the ultimate system, mount a switchable ratchet in the cockpit and a boom-mounted Ratchamatic® directly above for double holding power in heavy air and a free-running mainsheet when it’s light. The 75 mm provides up to 15:1 holding power; the 57 mm 10:1.

Use for:

  • Main/jib/spinnaker sheets

  • Mainsheet fine-tune

  • Traveler controls

  • Genoa leads

  • Foreguy

  • Vangs

Part No. Description (Click for more information) Price Buy Now
har2135 Harken 57mm Carbo Ratchet Block $63.99 Add to cart
har2136 Harken 57mm Carbo Ratchet Block w/Becket $69.99 Add to cart
har2137 Harken 57mm Carbo Ratchet Cheek Block $68.99 Add to cart
har2138 Harken 57mm Carbo Ratchet Block w/Cam Cleat $144.99 Add to cart
har2139 Harken 57mm Carbo Ratchet w/Cam & Becket $149.99 Add to cart
har2141 Harken 57mm Triple Carbo Ratchet w/Cam & Becket $215.99 Add to cart
har2670 Harken 75mm Carbo Ratchet Block $76.99 Add to cart
har2671 Harken 75mm Carbo Ratchet Block w/Becket $87.99 Add to cart
har2672 Harken 75mm Carbo Ratchet Cheek Block $79.99 Add to cart

Specifications:

57 mm

Part No. Description Sheave Diameter Length Weight Max Line Shackle Pin Safe Working Load Breaking Strength
    in mm in mm oz gr in mm in mm lb kg lb kg

2135

Single/swivel

21/4

57

41/16

103

3

85

3/8

10

3/16

5

500

227

2000

907

2136

Single/swivel/becket

21/4

57

415/16

125

3.3

94

3/8

10

3/16

5

500

227

2000

907

2137

Cheek***

21/4

57

31/4

83

2.5

71

3/8

10

500

227

2000

907

2138

Single/swivel/150 Cam-Matic®‡

21/4

57

41/16

103

8.7

247

3/8

10

3/16

5

300

136

750

340

2139

Single/swivel/150 Cam-Matic®/becket‡

21/4

57

415/16

125

9

255

3/8

10

3/16

5

600

272

1500

680

2140

Triple/swivel/150 Cam-Matic®‡

21/4

57

41/16

103

14.2

403

3/8

10

6

1500

680

3750

1700

2141

Triple/swivel/150 Cam-Matic®/becket‡

21/4

57

415/16

125

14.5

411

3/8

10

6

1800

816

4500

2041

75 mm

2670

Single/swivel

215/16

75

53/8

137

8

227

7/16

12

6

750

341

3000

1361

2671

Single/swivel/becket

215/16

75

61/2

165

8.75

248

7/16

12

6

750

341

3000

1361

2672

Cheek***

215/16

75

41/16

103

6.3

179

7/16

12

750

341

3000

1361


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