Petzl Mini Traxion

The Petzl Mini Traxion progress-capture pulley is compact and drop-resistant, making it highly efficient. It can be opened even when attached to an anchor, and is perfect for setting up haul systems. With a medium-diameter sheave and exceptional efficiency, it is ideal for hauling mid-weight loads. This pulley is also compact, reducing weight and bulk, which is especially advantageous in technical rescue and rope access work.

Features

Drop-resistant and simple to operate:

• The triple-action opening of the moving side plate allows for quick and easy operation, even when wearing gloves.
  
• The rope can be installed while the pulley remains attached to the anchor.
  
• A red indicator offers a clear visual warning when the moving side plate is not securely locked.
  
• The specially designed side plate protects the rope path from potential damage.
  
  

Designed for hauling mid-weight loads:

• The mid-sized aluminium sheave is mounted on sealed ball bearings, ensuring excellent efficiency.
  
  

Versatile:

• The toothed cam, featuring a self-cleaning slot, enhances performance in various conditions, including when ropes are frozen or dirty.
  
• It can also function as a simple pulley by locking the cam in the raised position.
  
• A hole in the cam is provided for the installation of a remote control cord.

Specifications

Technology

Technical Notice

• Download the PDF : technical-notice-MINI-TRAXION-2 - 3.45 MB

Declaration Of Conformity

• Download the PDF : UE-Declaration-P054AA00-MINITRAXION - 0.64 MB

Tips for maintaining your equipment

• Download the PDF - 2.72 MB

Inspection

PPE inspection procedure

• Download the PDF - 3.80 MB

PPE checklist

• Download the PDF - 0.19 MB

Video

Technical Content

PULLEY SYSTEM EFFICIENCY TESTS WITH MAESTRO, I’D S, PRO TRAXION, ROLLCLIP...

There can be a big difference between the theoretical efficiency of a pulley system and its actual efficiency. Here are test results from the Petzl lab.

1. Efficiency depending on the device used at the head of the system.

The force required to raise a 100 kg mass was tested under several configurations with different devices at the head of the system and with ropes of various diameters.

Test Protocol:

• Ropes tested: RAD LINE 6 mm, 7 mm cord, SEGMENT 8 mm, PUSH 9 mm, CLUB 10 mm, PARALLEL 10.5 mm, AXIS 11 mm, VECTOR 12.5 mm.
• Measurements were made with a constant pull rate of 1.5 meters/minute, on new devices and ropes.
• The results are given for information only; in the field there are numerous variables to take into account (position of haul system elements, rope diameter and construction, hauling speed, hauling smoothness, the haul load...).
  
  

Note: Pulley efficiency ratings in the Instructions for Use are based on values measured with a simple 1:1 directional. Hauling efficiency F = xx M is the value obtained with the smallest compatible rope diameter for the device. The pulley efficiency expressed in % is calculated from this value. Efficiency is always less than 100%, which is the efficiency of an ideal pulley (impossible in reality). Example for MAESTRO S: F = 116 M, efficiency = 86%

2. 3:1 Haul system efficiency depending on the redirect point used

HOW TO CALCULATE MECHANICAL ADVANTAGE

A mechanical advantage haul system reduces the effort required to raise a load. The mechanical advantage obtained is based on the pulley effect.

1. The Pulley Effect

If we consider a load suspended on a rope, the rope passing through a pulley above the user, with the user's hand holding the rope on the other side of the pulley; any force applied to one end of the rope is transmitted to the other end of the rope, or, in this case, to the end of the rope on the other side of the pulley.

If the load weighs 100 kg, it is clear that the user must hold 100 kg on their side to hold the load. The two rope strands each exert a pull of 100 kg, so the pulley supports 200 kg.

Note: This theory is valid for an ideal pulley of 100% efficiency, which does not exist in the real world.In reality, pulley efficiencies range from about 50 % to 98 %.To simplify calculations, this discussion is limited to ideal pulleys.

2. Calculating Mechanical Advantage in Practice

The efficiency (E) of a haul system indicates the force multiplier factor that you can exert on the rope.For example, if you are able to pull 20 kg maximum on a rope with your bare hands, a 3:1 haul system will enable you to raise a 60 kg mass.This reduction is obtained by increasing the amount of rope to be pulled: to raise a mass 1 meter with a 3:1 system, 3 m of rope must be pulled.

The efficiency (E) of a haul system may be calculated by adding the effects of each pulley.

Start by drawing a simple diagram of the system, then show the pulling force F that the hand applies to the rope.

Transmit the force F along the rope by adding the effects of each pulley.

When multiple rope strands are attached to the load (double pulley, rope clamp...), add the forces exerted by each strand.

1:1 Haul System

2:1 Haul System

3:1 Haul System

Note: The advantage of a 3:1 system is its ease of setup and that it can easily be converted to a complex system (7:1) with one additional pulley and some cord.

4:1 Haul System

5:1 Haul System