Arborist blocks are built to sustain shock loading, a situation where the load free-falls momentarily before being caught by the block. This places far more force on the hardware than normal lowering. Arborist blocks have widened cheek plates to protect ropes & an upper sheave to safely attach a rigging sling. Pulleys are not manufactured to handle shock loading and do not have the features necessary for use in tree rigging.
Click here for a brief guide to choosing an arborist block or pulley.
Arborist blocks are the proper tools for tree rigging and removal, with higher strengths, larger bend radii, upper sheaves for attaching slings, and wide cheek plates to protect the rope from abrasion.
These compact pulleys are perfect for tending your hitch on your climbing system or work positioning lanyard.
Half-inch blocks & pulleys are ideal for quick redirects, light rigging, slack tending, rescue operations, and more. Wide selection from Petzl, CMI, and others.
5/8” pulleys can handle stronger lines for everyday static rigging operations. (Note: these are not true arborist blocks and are not designed for shock loading.)
5/8” Capacity Blocks & Pulleys
Self-jamming pulleys, pulleys with built-in swivels, and other specialty pulleys can be found here.