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Harken Small Boat Flip-Flop Blocks

Harken Blocks

Harken Small Boat Flip-Flop Blocks

Small Boat Flip-Flop blocks pivot around the line axis to keep line close to the deck. Hinged construction allows for various lead angles.

Lightweight, machined 6061-T6 aluminum cheeks pivot on fiber-reinforced plastic chocks. Sheave runs exclusively on a ball bearing system for fast trim and release under any load.  Ball bearings, sheave, and sideplates are UV stabilized with carbon black for maximum protection.

Ratchamatic® versions roll freely in both directions under low loads and automatically engage a ratchet mechanism as loads increase, giving sailors a holding power of up to 15:1.  The ratchet engagement can be adjusted to a higher or lower load depending on the sailor’s strength, sailing style and system usage.

Reversible cam arms adjust and lock in a wide range of positions for crew accessibility and to accommodation of changing lead angles.

Part No. Description (Click for more information) Price Buy Now
har2142 Harken 57mm Carbo Flip Flop Block $157.99 Add to cart
har2143 Harken 57mm Carbo Flip Flop Block w/Cam Cleat $233.99 Add to cart
har2144 Harken 57mm Carbo Ratchamatic Flip Flop Block $186.99 Add to cart
har2145 Harken 57mm Carbo Ratchamatic Flip Flop w/Cam $260.99 Add to cart
har2678 Harken 75mm Carbo Flip Flop Block $194.99 Add to cart
har2679 Harken 75mm Carbo Flip Flop Block w/Cam $297.99 Add to cart
har2688 Harken 75mm Carbo Ratchamatic Flip Flop Block $234.99 Add to cart
har2689 Harken 75mm Carbo Ratchamatic Flip Flop Block w/Cam $334.99 Add to cart

Specifications

Part No Description Sheave Ø

Width

Length

Height

Max line Ø Weight Maximum working load Breaking load
in mm in mm in mm in mm in mm oz g lb kg lb kg

2142

57 mm

21/4

57

2

50

45/16

110

21/8

54

3/8

10

5

141

500

227

1584

718

2143

57 mm/150 Cam

21/4

57

25/8

66

45/16

110

45/16

110

3/8

10

11

304

300

136

600

272

2144

57 mm Ratchamatic®

21/4

57

2

50

45/16

110

25/8

67

3/8

10

5.5

156

500

227

1000

554

2145

57 mm Ratchamatic®/150 Cam-Matic®*

21/4

57

25/8

66

45/16

110

43/16

106

3/8

10

12

329

300

136

600

272

2678

75 mm

3

75

21/2

64

55/8

143

33/4

95

9/16

14

9.7

275

750

340

2426

1100

2679

75 mm/150 Cam-Matic®*

3

75

25/8

67

55/8

143

59/16

141

9/16

14

17

485

300

136

600

272

2688

75 mm Ratchamatic®

3

75

21/2

64

55/8

143

31/2

89

7/16

12

11

304

750

340

1500

680

2689

75 mm Ratchamatic®/150 Cam-Matic®*

3

75

25/8

67

55/8

143

53/8

137

7/16

12

18

514

300

136

600

272

*Maximum working loads and breaking loads for blocks based on cam strengths

 


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