The Petzl Tandem Speed really is the best zip line pulley out there, however it still does have good ratings for commercial work. It has a working load of 10kN and a breaking strength of 24kN
The Petzl Tandem Speed is a very fast pulley, this will cover up to 20 meters a second and is suitable for use on cables up to 12mm in diameter and rope up to 13mm. in case you are wondering 20 meters per second equates to nearly 45miles per hour!!
Petzl has designed the Tandem speed to feature fixed sides. It then incorporates twin stainless steel sheaths that are mounted on a set of sealed ball bearings. The sheaths give the best levels of speed regardless of the weight of the person, The fixed sides also feature two large mounting eyelets, these will easily accept up to three carabiners. This fast pulley has a working load of 10kN and a breaking strength of 24kN.
Features:
Stainless steel sheaves for excellent durability
Sheaves mounted on sealed ball bearings for sustained speed, independent of the weight of the person, temperature, or humidity
Attachment point accepts up to three carabiners to facilitate use
Specifications:
Maximum allowable speed: 20 m/s
Certification(s): CE EN 12278, UKCA, UIAA
Weight: 270g
Max. Rope Diameter: 13mm
Sheave Type: Sealed ball bearings
Sheave Diameter: 27.5mm
Efficiency: 95%
Working Load: 10kN
Breaking Strength: 24kN