leaf chain tensile breaking strengthWhen selecting the right leaf chain for a particular application, the most important consideration is that the minimum tensile or breaking strength of the chain is safe and legal for the load and type of machinery.

There are currently three levels of safety requirements that a chain must fulfill. The first is the Machinery directive 2006/42/EC, implemented in the UK as the Supply of Machinery (safety) Regulations 2008 which requires a minimum safety factor of 4:1. This means that the minimum tensile strength of a leaf chain must be four times the maximum load it is used to support.

However, most leaf chain manufacturers recommend a greater safety factor than this. For example, ISO 4347:2004 requires a factor of 5:1.

Finally, there are different legal requirements fo different types of mahines. For example, standard forklifts and telescopic handlers require a factor of 5:1 but man up forklifts and passenger lifts require a factor of 10:1 and 20:1 respectively.

Other factors that need to be considered when selecting a leaf chain are:

  • Number of load cycles
  • Number of Size of shock loads
  • Internal bearing pressure
  • Diameter of chain roller/pulley
  • Fatigue
  • Environmental conditions

After decades of experience working the the world's leading materials handling companies, we are able to advise on all these factors. Please don't hesitate to give us a call as ensuring you have the right leaf chain for your application is of vital importance.