Page 14 - Harken

40 mm Blocks

About Carbo Air blocks: see feature page at
beginning of this section. 2156
Tiwal 2, 2.79 m (9'2"), naval architect: Marion Excoffon © Tiwal

High-strength pivoting lead blocks
with cams are used for halyard
controls on larger keelboats and
as “headknockers” on dinghies and
beachcats for sheeting directly from
the boom. Hole spacing and rivet
size are the same as Classic models,
2157 making upgrades easy. Cam reverses
for either up or down cleating.

2638 2639 2640 2641 2642

2643
2647 2648 2654

Sheave Shackle pin Max line Maximum Breaking
Part Ø Length Weight Ø Ø working load load
No. Description in mm in mm oz g in mm in mm lb kg lb kg
2156 Pivoting lead block/150 Cam-Matic* ** 1 9/16 40 4 1/2 112 6.6 186 3/8 10 300 136 950 430
2157 Pivoting lead block/365 Carbo-Cam* ** 1 9/16 40 4 1/2 112 5.5 157 3/8 10 200 91 950 430
2638 Double/swivel 1 9/16 40 3 11/16 94 3.2 86 3/16 5 3/8 10 970 440 2380 1080
2639 Double/swivel/becket 1 9/16 40 4 5/16 110 3.4 90 3/16 5 3/8 10 970 440 2380 1080
2640 Triple/swivel 1 9/16 40 3 11/16 94 4.6 118 3/16 5 3/8 10 1455 660 3050 1383
2641 Triple/swivel/becket 1 9/16 40 4 5/16 110 4.7 122 3/16 5 3/8 10 1455 660 3050 1383
2642 Double/fi xed 1 9/16 40 3 1/2 89 2.8 80 3/16 5 3/8 10 970 440 2380 1080
2643 Double/fi xed/becket 1 9/16 40 4 3/16 106 2.9 84 3/16 5 3/8 10 970 440 2380 1080
2647 Triple/swivel/471 Carbo-Cam** 1 9/16 40 3 11/16 94 8.2 232 3/16 5 1/4 6 750 340 1500 680
2648 Triple/swivel/471 Carbo-Cam/becket** 1 9/16 40 4 5/16 110 8.3 235 3/16 5 1/4 6 900 408 1800 816
2654 Quad/swivel 1 9/16 40 3 11/16 94 6 170 3/16 5 3/8 10 1455 660 3050 1383
*Can be used as becket block. **Maximum working loads and breaking loads for blocks based on cam strengths.
24