CMI began making pulleys quite simply, with the introduction of just four 2 3/8" rescue pulleys to the market in 1982. They quickly became known the world over for their strength, durability and flexibility.
Whether you need a pulley for casual top-roping or long hauls, everyday confined space entry or "film at 11" rescues, or any of the variety of applications created by the blossoming ropes course industry, CMI has a pulley designed with your exact need and requirements in mind.
Prussik minding pulleys and a highline pulley designed with the hard-core rescuer in mind.
With the movement back to prussik-based safeties gaining momentum, the need for prussik minding pulleys that integrate directly into mechanical advantage systems is growing. To answer that need, CMI has developed eight prussik minding pulleys.
A larger 4" sheave with 5/8" rope capacity makes the RP138 the largest pulley of its kind; smaller compact packages make the RP137 and RP137D ideal for use in confined spaces or caves.
RP121 Prussik Minding Pulley
Sideplates: Red Anodized Aluminum
Sheave: 2" Aluminum
Mechanism: Bushing
Axle: Steel
MBS: 6800 lbs
Rope Capacity: 1/2" (12.7 mm)
Size: 5.5" x 4.25" (13.97 cm x 10.8 cm)
Weight: .6 lbs (9.6 oz)
Efficiency: 89.2%
RP121A Prussik Minding Pulley
Sideplates: Red Anodized Aluminum
Sheave: 2" Aluminum
Mechanism: Bearing
Axle: Steel
MBS: 6800 lbs
Rope Capacity: 1/2" (12.7 mm)
Size: 5.5" x 4.25" (13.97 cm x 10.8 cm)
Weight: .6 lbs (9.6 oz)
Efficiency: 90.6%
RP129NFPA Pulley
Sideplates: Stainless Steel
Sheave: 3" Aluminum
Mechanism: Bushing
Axle: Stainless Steel
MBS: 16000 lbs
Rope Capacity: 1/2" (12.7 mm)
Size: 6.75" x 5.25" (17.15 cm x 13.34 cm)
Weight: 1.65 lbs (26.4 oz)
Efficiency: 91.7%
RP132NFPA Pulley
Sideplates: Stainless Steel
Sheave: 2" Aluminum
Mechanism: Bushing
Axle: Stainless Steel
MBS: 8000 lbs
Rope Capacity: 1/2" (12.7 mm)
Size: 5" x 4" (12.7 cm x 10.16 cm)
Weight: .9 lbs (14.4 oz)
Efficiency: 90.7%
RP133NFPA Pulley -- Same as the RP132, in a double configuration