Product Description
The D4 is a double-stop device with an auto-lock function (which is activated whenever the operator lets go of the handle) and a panic brake which is not overly sensitive in normal use.
The D4 cam is made from a super hard solid stainless steel and is highly wear and corrosion-resistant. The D4 is compliant with CE Standards, NFPA T and ANSI Z359.4 for the worldwide rope access and rescue markets which typically use 10.5mm / 11mm ropes.
The D4 Descender features a unique and innovative progressive cam action, which offers control at slow or fast speeds. The progressive cam works by way of one cam operating inside another cam. It is also easy to back-feed the rope through the D4 and therefore it can be used for smooth ascending or for emergency hauling (when used as part of a 2:1 Z-rig').
The D4 has a rated load of 240 kg (529 lbs), making it a true Work / Rescue descender. It is not necessary to build in additional friction to achieve these loads, although it can be useful to do so, for an even higher degree of control in belay applications. The minimum user weight for these devices is 60 kg (132 lbs).
Specifications
Safety Notice
Although Bishop Lifting strives to manufacture and sell the highest quality rigging and safety gear, use of the gear is dangerous if not used correctly by competent trained professionals. Bishop Lifting disclaims any liability resulting from the misuse of its rigging and safety gear. Please take a moment to more thoroughly review our disclaimer.
Bishop Lifting rigging and safety gear is only intended to be used by competent trained professionals. Misuse of the rigging and safety gear can result in serious injury up to and including loss of life. As such, Bishop Lifting disclaims liability for any misuse or incorrect product selection by our customers.
Rigging and safety gear purchased from Bishop Lifting should be used in strict accordance with all industry and OSHA standards. At no time should rigging or safety gear be used beyond its certified load ratings (aka Working Load Limits). Normal wear and tear should be expected with use of rigging and safety gear; therefore, all gear should be thoroughly inspected before each and every use. Worn or unsafe rigging and safety gear should never be used.