CMI Stainless Steel Pulley for 5/8 in Rope

The CMI stainless steel pulley for 5/8 inch rope is a heavy duty pulley built for the rough side of tree work, where gear gets dragged, dropped in the chips, and left in the rain. Stainless construction stands up to abrasion and corrosion better than aluminum, at the cost of some weight.

Why stainless

Steel and stainless pulleys trade weight for durability. On a ground-based setup, a redirect at the base of a tree, or a mechanical advantage system that lives in the truck, that extra weight does not matter much, and the toughness pays off in years of service. Rope running across grit and sap wears aluminum faster than steel.

Use it with rope inside CMI's listed diameter range and within the published rating. Remember that a redirect sees close to twice the line tension, so size the anchor and sling to match.

Stainless also holds up to the kind of treatment ground gear gets: being tossed in a truck box, run over by a chipper's feed line, or left in a wet rope bag overnight. Keep it for the ground and send lighter aluminum hardware up the tree, where every ounce on the saddle counts over a long day.

Inspection

Check that the sheave turns freely, look for bent side plates or a worn axle, and clean out debris after muddy jobs. See other options 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.