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CMC ProTech Double Pulleys UL Classified to NFPA 1983
The choice for anyone that needs a super light, high strength pulley such as for mountain rescue, ski patrol, tower work, and swiftwater rescue. By machining the sideplates, the thiickness of the metal can be varied to maximize the "strength to weight" ratio, a process that cannot be done with the traditional bent metal sideplates. The unique axle assembly allows a smooth sideplate that will not catch on the surface or other hardware. The aluminum sheave is mounted on sealed ball bearings. Benefits • Unique non-snag design • Light weight yet G-rated strength • Rotating side plates allow for easy rigging Features • High Strength Aluminum Sheave • Ball Bearing for High Efficiency • Low Profile Hardware Minimizes Snagging on Ground or Components • Rounded Edges on High Strength Aluminum Side Plates • Bottom Shaped for Maximum Efficiency with Prusik Hitches NFPA Standard 1983 Pulley Performance Requirements, Light-Use • Minimum 3 sigma breaking strength (3σ MBS) of not less than 22 kN (4,946 lbf). • 3σ MBS of a becket of not less than 12 kN (2,698 lbf). | Item # | 300502 /300552 | | Sheave Size | 1 x 7/16 in. (25 x 11 mm) | | Type | Double | | Color | Sand/Silver or Black | | NFPA Designation | General Use | | 3σ MBS* Pulley | 8,273 lbf. (36.8 kN) | | Weight | 5.6 oz. (159 g) |
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