Always store and handle eyebolts correctly
Always inspect eyebolts before use and before placing in storage
Always select the correct pattern eyebolt for the application.
Always ensure that the eyebolt and tapped hole threads are compatible and strong enough for the load.
Always correctly align the plane of the eye using shims where necessary.
Always ensure that the collar is correctly seated when hand tight.
Never use bars, grips or wrenches to tighten eyebolts.
Never use dynamo eyebolts for angular loading.
Never use a single eyebolt to lift a load that is free to rotate.
Never reeve slings through the eyes, links or shackles fitted to pairs of eyebolts.
Never force hooks or other fittings into the eye; they must fit freely.
Never shock load eyebolts.
Selecting the Correct Eyebolt
Eyebolts are available to a number of standards, – common in New Zealand are BS4278 and Din580. BS4278 are available as eyebolts, eyebolts with links, and as dynamo eyebolts. Eyebolts are also available in grade 80 and in “rotating lifting point” configuration. Select the eyebolt to be used and plan the lift taking the following into account:
- Type of eyebolt – Some eyebolts are not suited to axial loading.
- Capacity (rating eyebolts for axial angular loading). It is necessary to reduce the W.L.L. of BS eyebolts by the following factors when using eyebolts with two leg slings.
Type of eyebolt 0°<α≤30° 30°<α≤60° 60°<α≤90°
Eyebolt with link 1.00 0.80 0.63
Collared eyebolt 0.63 0.40 0.25
Storing and Handling Eyebolts
Never return damaged eyebolts to storage. They should be dry, clean and protected from corrosion. Care must be taken to protect threads from damage whilst in storage.
Where possible, use removable plugs to exclude debris from tapped holes.
Using Eyebolts Safely
Do not attempt lifting operations unless you understand the use and limitations to use of the equipment, the slinging procedures and the mode factors to be applied.
Do not use defective eyebolts. Check the thread of both the eyebolt and the hole to ensure that they are compatible, fully formed, of sufficient length, undamaged and clear of any debris which may prevent proper engagement.
Ensure that the contact surface around the hole is flat, clean and perpendicular to the thread axis. Tighten the eyebolt down by hand. The eye must be in the correct plane and the collar must sit evenly on the contact surface. Use shims but do not machine the collar or over tighten to achieve this.
A hook may be engaged directly into the eye of a dynamo eyebolt or the link of an eyebolt with link. BS4278 collared eyebolts must be fitted with a shackles or links to accept hooks. The hooks must fit freely so do not wedge or force them into position.
Never reeve a sling through the eyes, links or shackles fitted to eyebolts used in pairs as this will impose a severe resultant load to the eyebolts.
Dynamo eyebolts must only be used for axial loading. When using eyebolts with multi-leg slings use eyebolts with links or collared eyebolts taking care to de-rate them correctly for angular loading conditions.
Where a single eyebolt is used, use a swivel or swivel hook to prevent the eyebolt from unscrewing.
In Service Inspection and Maintenance
Maintenance requirements are minimal. Keep eyebolts clean, protect from corrosion and protect the threads from damage. Do not attempt to straighten bent eyebolts or re-cut the threads.
Regularly inspect the eyebolt and, in the event of the following defects, refer the eyebolt to a Competent Person for thorough examination: illegible markings; distortion; worn or bent shanks and threads; incomplete or incorrectly formed threads; damaged eyes; nicks, gouges, cracks, corrosion or other defects.
For a PDF version of this page please click here: Care and Safe Use of Eyebolts