1/2" pulleys and blocks are generally used for redirects, light rigging, and hauling systems. Good ropes to use with a 1/2" pulley or block are 1/2" Samson Stable Braid, and 1/2" Static Kernmantle. We carry a wide selection of pulleys and blocks in this size, including double sheave pulleys, prusik minders, and true arborist blocks, like the aluminum Hobbs block. For more information on using blocks and pulleys in tree work, check out the Art and Science of Practical Rigging. Click on a picture for a larger image.
Please note that Working Load Limits (WLL) are listed at 10% of the Breaking Strength (Breaking Strength.) This is a safer ratio to use than the 5:1 ratio commonly used for lifting applications, as tree work involves the risk of shock loading, and it is the same ratio used when calculating the Working Load Limit of Arborist Rope.
Aluminum body, sheave, bushing, stainless steel axle.
WLL 750 lbs. Breaking Strength 7,500 lbs.
Aluminum body, sheave, bearing, stainless steel axle.
WLL 750 lbs. Breaking Strength 7,500 lbs.
Stainless steel side plates, aluminum sheaves, bearing, stainless steel axle.
WLL 1,100 lbs. Breaking Strength 11,000 lbs.
Aluminum side plates, large sheave on sealed ball bearings. Extremely efficient, lightweight, and compact. This pulley has a place in any rescue kit.
WLL 720 lbs. Breaking Strength 7,200 lbs.
Aluminum side plates, sheave, sealed ball bearings, designed for hauling and pulling systems. Highly efficient sheave mounted on ball bearings.
WLL 810 lbs. Breaking Strength 8,100 lbs.
Aluminum side plates, sheave, sealed ball bearings, designed for hauling and pulling systems. Highly efficient sheaves mounted on ball bearings. Double sheaves, lower becket.
WLL 990 lbs. Breaking Strength 9,900 lbs.
Designed for Tyrolean traverses on rope or making zip lines. Sheaves mounted on self-lubricating bushings for good efficiency.
Maximum allowable speed: 10 m/s. Accepts up to three carabiners to facilitate use.
WLL 2,225 lbs. Breaking Strength 5,400 lbs.
Hobbs blocks are amongst the finest rigging blocks in the world. Extremely strong, and built to withstand shock loading.
WLL 4,000 lbs. Breaking Strength 40,000 lbs.
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