CMI 2 Inch Service Pulley

The CMI 2 inch service pulley is a small, simple pulley for the everyday rope jobs around a tree site: hauling gear up to a climber, adding a redirect to a tag line, or building a small mechanical advantage. It is light enough to clip on a saddle and forget about until you need it.

Everyday uses

A service pulley earns its spot by being handy. Send it up with a throw line to hang a gear-haul line, put it at the base to redirect a pull rope away from a hazard, or use it with a prusik to build a quick 3:1 for tensioning a line. Larger sheaves run more efficiently, but a 2 inch pulley is a good balance of size and weight for small jobs.

Keep the loads light. A service pulley is not a heavy rigging block, and it should not be used to catch falling wood. Check CMI's listed rating and rope range for this pulley.

Because it is cheap and light, many crews keep a couple in the truck alongside a few prusik loops and a spare length of rope, so there is always a simple haul system ready when a climber needs a saw, a pole tool, or a water bottle sent up.

Care

Clean out sawdust and sap, spin the sheave to check for smooth rotation, and look over the side plates and axle for wear or damage. Find more pulleys in our rigging pulleys section.

Rigging forces are dynamic and can be several times the weight of the piece. Follow the manufacturer's ratings and ANSI Z133, inspect every component before the job, and keep rigging work to trained crews.