Hand Pulley Block

HPB, a U.K. design, is used to change the Load Line direction with a machined steel sheave.

Drop forged, heat treated swivel hook and latch with stretch indicator and identity code.

Can be furnished with bronze bushings or roller bearings.

Openning feature permits quick insertion and positioning of rope on the sheave.

Blocks can be securely locked by swinging the hook in the direction of pull.

Groove and sheave is made from high quality machined alloy steel to suit its intended rope diameter.

For Use with steel wire rope and fibre rope.

Manufactured in accordance with European standard EN 13157:2003, and the machinery directive 98/37/EC.

The right chart indicates the factor to be multiplied by the line pull to obtain the total load on the block.

Example

(Calculations for determing total load value on single line system.)
A gin pole truck lifting 1,000 lbs.

There is no mechanical advantage to a single part load line system, so winch linepull is equal to 1,000 lbs. or the weight being lifted.

To determine total oad on snatch block A:
A = 1,000 lbs. x 1.81 = 1,810 lbs.
      ( line pull ) ( factor 50° angle )
B = 1,000 lbs. x .76 = 760 lbs
      (line pull ) (factor 135° angle)

 

Ableforge Hand Pulley Block Champin HPB Type