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Harken Big Boat Blocks Tech Info
harken sailboat yatch equipment
Go to: Harken Blocks | Big Boat Blocks | Use Harken Big Boat Chart
Harken - Tech Info

- 57 mm Blocks
- 75 mm Blocks
- 100 mm Blocks
- 125 mm & 150 mm Blocks
- Stainless Steel Blocks


- Teardrop Blocks
- Crossover Blocks
- Mastbase Halyard Lead & Flip-Flop
- Footblocks
- Air Runners Blocks
- Stainless Steel Runners
- Snatch Blocks
- ESP Blocks
- Stainless Steel ESP Blocks
- Opening Footblocks
 

57 mm Blocks: harken big boat block, harken 57 mm block
Part
No.
Description
Sheave
Max Line
Safe
Working Load
Breaking
Strength
in
mm
in
mm
lb
kg
lb
kg
1950 Single/swivel/low-load
2 1/4
57
7/16
12
1655
750
3310
1500
1951 Single/swivel/low-load/becket
2 1/4
57
7/16
12
1655
750
3310
1500
1952 Double/swivel/low-load
2 1/4
57
7/16
12
2755
1250
5510
2500
1953 Double/swivel/low-load/becket
2 1/4
57
7/16
12
2755
1250
5510
2500
1954 Triple
2 1/4
57
7/16
12
4850
2200
9700
4400
1958 Single/swivel/high-load
2 1/4
57
7/16
12
2500
1134
5000
2268
1959 Single/swivel/high-load/becket
2 1/4
57
7/16
12
2500
1134
5000
2268
1960 Double/swivel/high-load
2 1/4
57
7/16
12
3600
1633
7200
3267
1961 Double/swivel/high-load/becket
2 1/4
57
7/16
12
3600
1633
7200
3267
1965 Stand-up/high-load
2 1/4
57
7/16
12
2500
1134
5000
2268
3041 Straphead/high-load
2 1/4
57
7/16
12
2500
1134
5000
2268

** Safe working loads and breaking strengths for blocks based on cam strengths
.

75 mm Blocks: harken big sailboat block, 75 mm block
Part
No.
Description
Sheave
Max Line
Safe
Working Load
Breaking
Strength
in
mm
in
mm
lb
kg
lb
kg
1962 Spriddle/becket
3/2 1/4
75/57
9/16
14
5000
2268
10000
4536
1969 Single/swivel
3
75
9/16
14
5000
2268
10000
4536
1970 Single/swivel/becket
3
75
9/16
14
5000
2268
10000
4536
1971 Double/swivel
3
75
9/16
14
7500
3402
15000
6804
1974 Stand-up
3
75
9/16
14
5000
2268
10000
4536
1975 Spriddle
3/2 1/4
75/57
9/16
14
5000
2268
10000
4536
1999 Straphead
3
75
9/16
14
5000
2268
10000
4536
3088 Straphead spriddle
3/2 1/4
75/57
9/16
14
5000
2268
10000
4536
3090 Single/swivel/low-load
3
75
9/16
14
3000
1361
6000
2722
3091 Single/swivel/becket/low-load
3
75
9/16
14
3000
1361
6000
2722
3092 Double/swivel/low-load
3
75
9/16
14
4500
2041
9000
4082
3093 Spriddle/low-load
3/2 1/4
75/57
9/16
14
3000
1361
6000
2722
3094 Spriddle/becket/low-load
3/2 1/4
75/57
9/16
14
3000
1361
6000
2722
Top                  
.

100 mm Blocks : harken 100 mm big boat block
Part
No.
Description
Sheave
Max Line
Safe
Working Load
Breaking
Strength
in
mm
in
mm
lb
kg
lb
kg
1993 Spriddle
4/3
100/75
5/8
16
7500
3402
15000
6804
3007 Single/swivel
4
100
5/8
16
7500
3402
15000
6804
3008 Single/swivel/becket
4
100
5/8
16
7500
3402
15000
6804
3009 Double/swivel
4
100
5/8
16
11000
4990
22000
9979
3012 Stand-up
4
100
5/8
16
7500
3402
15000
6804
3015 Straphead
4
100
5/8
16
7500
3402
15000
6804
3089 Straphead spriddle
4/3
100/75
5/8
16
7500
3402
15000
6804
Top
.

125 mm & 150 mm Blocks: harken big boat block, harken 125 & 150 mm block
Part
No.
Description
Sheave
Max Line
Safe
Working Load
Breaking
Strength
in
mm
in
mm
lb
kg
lb
kg
3016 Single/swivel
5
125
3/4
19
11000
4990
22000
9977
3018 Stand-up
5
125
3/4
19
11000
4990
22000
9977
3021 Single/swivel
6
150
1
25
15000
6802
30000
13605
3022 Stand-up
6
150
1
25
15000
6802
30000
13605
3032 Straphead
5
125
3/4
19
11000
4990
22000
9977
Top                  
.

Stainless Steel Blocks: harken stainless steel blocks
Part
No.
Description
Sheave
Max Line
Safe
Working Load
Breaking
Strength
in
mm
in
mm
lb
kg
lb
kg
3129 Single
3
75
9/16
14
5000
2268
10500
4536
3130 Single/becket
3
75
9/16
14
5000
2268
10500
4536
3131 Footblock
3
75
9/16
14
5250
2382
10500
4763
3132 Single
4
100
3/4
19
7500
3402
15000
6804
3133 Single/becket
4
100
3/4
19
7500
3402
15000
6804
3134 Footblock
4
100
3/4
19
7750
3515
15500
7031
3135 Single
6
150
7/8
22
18000
8165
36000
16329
3136 Single/becket
6
150
7/8
22
18000
8165
36000
16329
3137 Footblock
6
150
7/8
22
18250
8278
36500
16556
3138 Stand-up
3
75
9/16
14
5000
2268
10000
4536
3152 Stand-up
4
100
3/4
19
7500
3402
15000
6804
Top                  
.

Teardrop Blocks: 
Part
No.
Description
Sheave
Max Line
SWL
Breaking
Strength
Use Padeye
in
mm
in
mm
lb
lb
kg
3042 Mastcollar/low-load
2 1/4
57
3/8
10
1655
3310
1500
-
3044 Padeye/high-load
2 1/4
57
3/8
10
2500
5000
2268
627
3046 Mastcollar/low-load
3
75
9/16
14
3000
6000
2721
-
3047 Padeye
3
75
9/16
14
5000
10000
4535
648/689
3050 Padeye
4
100
5/8
16
7500
15000
6804
-
Top                  
.

Crossover Blocks: harken cross over blocks
Part
No.
Description
Sheave
Max Line
Safe
Working Load
Breaking
Strength
in
mm
in
mm
lb
kg
lb
kg
1981 Crossover block
2 3/16
56
7/16
12
3000
1361
6000
2721
1984 Crossover block
1 3/4
44
3/8
10
2000
907
4000
1814
Top                  
.

Mastbase Halyard Lead & Flip-Flop Blocks: harken mast base blocks
Part
No.
Description
Sheave
Max Line
Safe Working Load
Breaking
Strength
in
mm
in
mm
lb
kg
lb
kg
 
                   
1986 Halyard lead block
1 3/4
44
3/8
10
750
340
1500
680
1987 Flip-flop block
3
76
1/2
12
5000
2273
100001
4545
1988 Mastbase block/fixed
2 1/4
57
3/8
10
2500
1136
5000
2273
1989 Flip-flop block/lockoff
3
76
1/2
12
5000
2273
10000
4545
1990 Mastbase block/fixed
3
76
1/2
12
5000
2273
10000
4545
3002 Single over-the-top block
2 1/4
57
3/8
10
2500
1136
5000
2273
3003 Double over-the-top block
2 1/4
57
3/8
10
2500
1136
5000
2273
3004 Triple over-the-top block
2 1/4
57
3/8
10
2500
1136
5000
2273
3053 Mastbase block
4
102
5/8
16
7500
3402
15000
6804
Top                  
.

Footblocks: harken footblock
Part
No.
Description
Sheave
Max Line
SWL
Breaking
Strength
Fasteners
(FH)
in
mm
in
mm
lb
lb
in
mm
1963 Single/high-load
2 1/4
57
7/16
12
2500
5000
4-1/4
6
1964 Double/high-load
2 1/4
57
7/16
12
1650
3300
4-1/4
6
1967 Single/high-load/lockoff
2 1/4
57
7/16
12
2500
5000
4-1/4
6
1968 Double/high-load/lockoff
2 1/4
57
7/16
12
1650
3300
4-1/4
6
1972 Single
3
75
9/16
14
5250
10500
4-5/16
8
1973 Double
3
75
9/16
14
3465
6930
4-5/16
8
3005 Single/lockoff
3