CMI RNA Pulley

The CMI RNA Pulley, short for Roller-N-Anchor, is a specialized arborist pulley designed for canopy anchors and professional tree-climbing systems. Machined from a solid block of aircraft-grade aluminum, the RNA combines high tensile strength with a broad, flat surface designed specifically for cinched canopy-anchor applications. 

The RNA can be used in cinched canopy anchors, moving-rope-system anchors, spar anchors, and midline mechanical-advantage systems for stationary-rope-system limb walks. When incorporated with a friction saver, the pulley reduces friction for smoother climbing and easier retrieval of redirected canopy-anchored lines. Its strength also allows for appropriately configured rescuable systems. 

Features

• Purpose-built Roller-N-Anchor pulley
• Machined from solid aircraft-grade aluminum
• Designed for cinched canopy anchors
• Suitable for MRS anchor configurations
• Suitable for spar anchors
• Supports midline mechanical advantage in SRS limb-walk applications
• Rated becket
• Designed to support rescuable systems when properly configured
• Both openings accommodate small retrieval balls
• Openings can accommodate a bight or two lines, depending on rope construction
• Helps reduce friction when incorporated with a friction saver
• Compact design for professional arborist systems. 

Specifications