Parts of machines that move past each other or stationary objects can cause a shear point resulting in a crushing or cutting action.
Types of machinery
- Bale wrappers
- Baler crank arms
- Augers and conveyors
- Powered cattle crushes
- Feeder wagons
Operator error
- Entering or reaching into the danger zone with the machine working
- Failing to ensure guards or safety devices are in place
- Not securing the machine or removing residual energy before maintenance
Design points
- Use fixed guards to prevent access to shear points that are not 'safe by position'. Fixed guards must require the use of a tool to open or remove and their fixings should generally remain attached to either the guard or machine when removed.
- If access is needed that precludes the use of fixed guards, use interlocking guards.
- If it is not practicable to use interlocking guards, use fixed distance guards and barriers secured in position.
- If guarding is not practical, fit safety devices such as trip bars that will detect the presence of a person and stop the machine
- Provide a means of immobilising the drive mechanism such as a flywheel brake or locking system
Operator instructions and training
Instructions for using this type of machinery must include clear guidance on:
- 'Safe Stop' procedure before attempting to clear blockages or carry out maintenance work
- The need to keep guards and safety devices well maintained and in place
- How to use and maintain immobilisation devices
- Safe working method to carry out maintenance
- Relevant training, eg Lantra qualification and accreditation
Find out more
- Standard BS EN ISO 4254-1 Agricultural machinery safety – General requirements