• 3-1/2\" enameled cast iron pulley mounted in a galvanized steel bracket
• Fitted with Needle Bearing and Grease Zerk
• Accepts up to 1/4\" diameter cable

LOADS ON PULLEY BLOCKS

A single sheave block used to change load line direction can be subjected to total loads greatly different from the weight being lifted or pulled.The total load value varies with the angle between the incoming and departing lines to the block. When these lines run parallel (0 degree angle between the incoming and departing lines), load on the block will be 2 times the line load.The following chart indicates the factor to be multiplied by the lineload to obtain the total load on the block.

Angle Factor Multipliers

Angle

Factor

Angle

Factor

0°

2.00

100°

1.29

10°

1.99

110°

1.15

20°

1.97

120°

1.00

30°

1.93

130°

.84

40°

1.87

135°

.76

45°

1.84

140°

.68

50°

1.81

150°

.52

60°

1.73

160°

.35

70°

1.64

170°

.17

80°

1.53

180°

.00

90°

1.41

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CAUTION: Do NOT use Breaking Strength for design or rating purposes. Use Working Load Limit instead. Pambina ImpEx assumes no responsibility for the use, misuse or misapplication of its products. Products are sold with the specific understanding that the purchaser and/or user are thoroughly familiar with their proper use.