Front	Rear

Side	Open for Rigging

Technical Details

I acquired my CMC Rescue from Melanie Joyce in 2020.

My CMC Rescue is 108 mm. long, 327 mm. wide, 63 mm. high, and weighs 1501 g.

The CMC Rescue is a double pulley with an eccentric cam that prevents one strand of rope from entering the device. The central frame is an anodized aluminum extrusion with a rectangular channel for mounting the cam and a 15.5 mm. U-shaped channel for the rope. The cam is milled from aluminum alloy. It has eight Z-shaped teeth. The cam is attached to the frame with a hex socket bolt and a lock nut. A spring-loaded pull pin provides a means to lock the cam open. A steel pin in the loser outside of the cam acts as a cam stop. A short length of 1.7 mm. stainless steel cable attached to the cam is followed by a long err length of 3 mm. cable, allowing the cam to be opened remotely. There is a 32 mm. wide, 22 mm. high D-shaped carabiner hole at the bottom of the device.

The two anodized aluminum pulleys are 89 mm. in diameter, which is larger than those on the CMI Uplift, RSI Rescue Hauling Pulley or the SRT Rescuemates. The pulleys can handle ropes up to 12.5 mm. without dragging, and up to 18 mm. with degraded performance. The pulley side plates are anodized different colors, so that one can tell the front and back sides of the device without looking at the cam area. The pulleys and side plates are bolted to the frame, apparently on a loose-fitting rod with threads at each end. The pulleys and side plates tend to flop around on the frame. The pulley bearings are rather good, and allow the pulleys to turn freely.

The front plate is printed with "CMC RESCUE," "MEETS NFPA 1983 (95 ED.)," "G (GENERAL USE), "MBS 8,000 LBF," the UL Classified logo, and "LOTSW0201,"

Comments

No instructions came with the device. There are two obvious ways to rig the device for a 4:1 hauling system. In the first, the cam supports one half of the load while the hauling team resets for another pull. In the second, the cam supports one fourth of the load, but the frame pivots with each pull and the rope runs over a portion of the rope channel that should have been rounded, but wasn't. Thirty seconds with a rat-tail file will fix this oversight.

Overall, this is a well-made device designed for rescue applications, although mine has some defects due to age, dirt, and/or corrosion. The red and gold swinging plates turn together, and it is difficult to move them independently. The cam lock is quite stiff, and not easy to operate.