Roymech engineering encyclopedia

Lifting Equipment



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Types of Lifting Equipment


Collar Eyebolts

A collar eyebolt is a type of eyebolt that includes a collar or shoulder beneath the eye. This design is intended to provide additional strength and support, especially in applications where the load may be lifted at an angle or where there is a need for increased stability.

Collar Eyebolts

Dynamo Eyebolts

The Dynamo eyebolts have a larger eye than the Collared option but have a smaller safe working load (SWL). It should be noted that the SWL is vastly reduced when angular lifting is applied.

Dynamo Eyebolts

Bow Shackle

A Bow Shackle is an 'O' shaped metal link which is closed by a bolt. Similar to an Anchor Shackle, the rounded design of both shackles allows Bow Shackles to take loads from many directions without developing a side load.

Bow Shackle

Dee Shackle

Dee Shackles get their name from being shaped similar to the letter 'D'. The entrance to the shackle is the same width as the whole shackle body, making D Shackles ideal for standard rigging, connecting to chains and hoists, and perfect for confined spaces where smaller dimensions are pivotal.

Dee Shackle

Eyebolt with Links

The additional link, often positioned near the eye of the eyebolt, provides an extra point for connecting other rigging components, such as hooks, chains, or additional slings.

Eyebolts with Links



Relevant UK standards for eyebolts and shackles:

Eyebolts:

  • BS EN 1808: "Safety requirements for cableway installations designed to carry persons - Eyebolts"
  • BS 4278: "Code of practice for testing of safety bolts and eyebolts"
  • BS 13200-7: "Cranes - Safety - Part 7: Eye bolts for lifting purposes - Properties and requirements"

Shackles:

  • BS EN 13889: "Forged steel shackles for general lifting purposes - Dee shackles and bow shackles - Grade 6"
  • BS 3032: "Specification for shackles"
  • BS 3032-1: "High tensile shackles for general engineering purposes - Part 1: Dee shackles and bow shackles - Commercial types"

Relevant US standard for eyebolts and shackles:

ASME B30.26 for eyebolts and ASME B30.26 for shackles in the United States