Two wraps are recommended for best use. A wrap is defined as crossing
the top of the device. Larger loads (up to 1,000 lbs) can be rigged with
three wraps. With three wraps on the device it will be harder to pull
rope back while unloaded, and this is recommended only for the
occasional large loads or for controlling a rigging line placed at the
butt of the load.
The Aerial Friction Brake is based on a rope and rescue tool created by
Carroll C. Bassett called the BMS Belay Spool. The benefits of this
improved, arborist-specific design include:
Canopy controllable friction
Snatch function allows easy attachment to the anchor sling and the ability to attach a rigging rope mid-line
Extra wide side plates to prevent pinching of the running rope
Square bollard decreases surface contact of unloaded rope, decreasing friction and allowing the unloaded rope to be pulled back (more difficult with three wraps)
Big Bear Tools is Canada’s wholesaler of quality imported sharp/edge tools and related products. From German landscaping pruners and Japanese hand saws to American arborist saws, Swedish axes and sharpening equipment, we have all the finest tools!