Regular Wood Shell Blocks for Manila Rope

These regular mortise wood blocks for manila rope have drop forged fittings. They are available with iron, roller or bronze, self-lubricating bushings. Metal parts may be painted or galvanized.

Block Size, Inches 3 4 5 6 8 10 12
Diameter Rope, Inches 3/8 1/2 5/8 3/4 1 1 1/8 1 1/4
Sheave
Size
Inches
O.D. 1 3/4 2 1/4 3 3 1/2 4 3/4 6 1/4 8
Rim Thick 1/2 5/8 3/4 1 1 1/8 1 1/4 1 3/8
Ctr. Pin Dia. 3/8 3/8 3/8 1/2 5/8 5/8 3/4
Weight
in
Pounds
Single 1/2 2 1/2 4 9 1/2 1 7 25
Double 1 1/2 3 4 6 1/2 13 25 39
Triple 2 4 5 1/2 9 17 32 48
Working
Load Limit*
Pounds
Single 500 1,000 1,200 1,800 2,800 4,000 5,000
Double 800 1,400 1,800 2,500 3,800 6,000 8,000
Triple 1,200 1,800 2,400 3,200 4,800 8,000 10,000

Heavy Wood Shell Blocks for Manila Rope

These heavy, wide mortise wood blocks have cross bolted shells and drop forged fittings. They have bronze self-lubricating bushings and galvanized metal parts.

Block Size, Inches 6 8 10 12 14 16
Diameter Rope, Inches 3/4 1 1/8 1 1/4 1 1/2 1 3/4 2
Sheave
Size
Inches
O.D. 3 1/2 4 1/2 6 1/4 8 9 1/2 11
Rim Thick 1 1 3/8 1 1/2 1 5/8 1 7/8 2 1/4
Ctr. Pin Dia. 1/2 5/8 3/4 3/4 7/8 1
Weight
in
Pounds
Single 5 1/2 12 23 31 53 68
Double 9 18 33 48 80 110
Triple 12 25 43 67 114 156
Working
Load Limit*
Pounds
Single 2,000 3,300 5,000 6,800 9,600 12,000
Double 3,300 5,100 7,700 10,600 15,000 19,000
Triple 4,000 7,000 10,000 14,000 20,000 24,000
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