Brake fficiency reference data
| Model | Spec | efficiency | SAUCE |
|---|---|---|---|
| Petzl Pro Traxion | self Jamming | 90‐92 | Slack Science |
| Petzl Pro Traxion | self Jamming | 95 | official data |
| Petzl Pro Traxion old model | 83 at 0.4kN | ropetech | |
| Petzl micro Traxion | self Jamming | 91 | official data |
| Petzl micro Traxion | self Jamming | 87 at 1kN | Ropelab |
| Petzl Mini Traxion | self Jamming | 74 at 1kN | Ropelab |
| Petzl Mini Traxion | 69 at 1kN | ropetech.jp | |
| Petzl ID | Descender | 20-40 | |
| Petzl ID | Descender | 37 | Ropelab |
| Petzl RIG | Descender | 27 at 0.4kN | ropetech.jp |
| Petzl GriGri | Belay Device | 30－50 | Slack Science |
| Petzl GriGri1 | Belay Device | 44 at 1kN | Ropelab |
| Petzl GriGri1 | 42 at 0.4kN | ||
| Petzl GriGri2 | Belay Device | 45 at 1kN | Ropelab |
| Edy | Belay Device | 30－50 | |
| CMC MPD | Multi-Purpose Device | 93 | Ropelab |
Pulley Efficiency reference data
| Model | Spec | efficiency | SAUCE |
|---|---|---|---|
| SMC 3″ Double | bearing | 94~96 | Slack Science |
| Pwtzl Partner | bearing | 91 | official data |
| Petzl TWIN | bearing | 97 | official data |
| Petzl Rollclip | Carabiner pulley bearing | 85 | official data |
| Petzl rescue P50 | bearing | 95 | official data |
| Petzl rescue P50 | 89 at 1kN | Ropelab | |
| Petzl rescue P50 | 90 at 0.4kN | ropetech.jp | |
| Petzl mini P59 | bearing | 91 | official data |
| Petzl mini P59 | 86 at 1kN | Ropelab | |
| Petzl mini P59 | 81 at 0.4kN | ropetech.jp | |
| Petzl MINDER | bearing | 97 | official data |
| Petzl fix | bushing | 71 | official data |
| Petzl fix | bushing | 75 at 0.4kN | ropetech.jp |
| Oval Carabiner | Carabiner | 42－56 | Slack Science |
| Petzl orange plastic | Carabiner + sheave | 80 | Ropelab |
| DMM revolver | Carabiner + | 52 at 0.4kN | ropetech.jp |
| climbingtechnology ORBITER T | bearing | 96 | official data |
| Climbing Technology ORBITER S | bearing | 96 | official data |
| Climbing Technology ORBITER M | bushing | 80 | official data |
| CAMP single bussing 2 3/8” | bushing | 86-88 | Slack Science |
| CAMP doubles are 2 3/8” | bearing | 92 | Slack Science |
| CAMP JANUS PRO | bearing | 97 | official data |
| CAMP JANUS | bushing | 90 | official data |
| CAMP DRYAD | bushing | 80 | official data |
| CAMP DRYAD PRO | bearing | 92 | official data |
An In-Depth Look At Pulley Efficiency
Pulley efficiency is critical to a high-performing tensioning system. We find that switchi...
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