A production machine has an emergency-stop button, a warning sign and an experienced operator. None of those measures prevents a hand, sleeve or tool reaching a dangerous moving part. Machine guarding must keep people away from crushing, shearing, entanglement, cutting and drawing-in hazards during normal production, setting, cleaning and foreseeable intervention. The right control depends on the machine and task, but the legal hierarchy starts with physical prevention—not a reminder to be careful.
PUWER sets a guarding hierarchy
Regulation 11 of the Provision and Use of Work Equipment Regulations 1998 (PUWER) requires effective measures to prevent access to dangerous machinery parts or to stop their movement before anyone enters the danger zone. The measures follow a hierarchy: fixed guards or enclosures where practicable; other guards or protection devices; protection appliances such as jigs, holders or push sticks; and then information, instruction, training and supervision for residual risk.
That order matters. A rule, sign, emergency stop or item of personal protective equipment is not an equivalent substitute where a suitable guard can prevent contact. The assessment should identify each dangerous movement, how far it can be reached, who may be exposed and every reasonably foreseeable operating state—not only the ideal production cycle.
PUWER applies to machinery already in use as well as newly purchased equipment. A conformity mark or supplier declaration does not remove the employer's duty to ensure that the equipment is safe in its actual installation and use.
Assess the danger zone—not just the obvious blade
Map the complete hazardous area. Look for rotating shafts and chucks, in-running nips, belts and pulleys, gears, cutters, presses, robot movements, powered rollers and parts that descend, traverse or eject material. Include hazards created by the workpiece, swarf, broken tooling and unexpected movement after a jam or misfeed.
Then observe the real job. Operators may load blanks, remove finished parts, take samples, clear offcuts, adjust settings, inspect quality or clean around sensors. People may reach over, under, around or through a guard; an opening that looks small can still allow fingers or a tool into the danger zone. Consider contractors, cleaners, inexperienced staff, temporary workers, young people and anyone whose mobility, vision, reading ability or language needs affect the safe method.
A North East fabricator, food producer or packaging business may use older equipment alongside newer automated cells. Age does not decide whether a machine can remain in service. The question is whether its risks are adequately controlled now, in the way it is actually used.
HSE: using work equipment safely ↗ · Related guide: young worker risk assessment →
Use fixed guards wherever they are practicable
HSE guidance says fixed guards should be used wherever possible. They should be robust, securely fastened and removable only with a tool. Their material, openings, position and distance from the hazard must prevent access while containing foreseeable ejected material, fluids or fragments where necessary. A mesh panel is not suitable merely because it looks substantial; aperture and reach distance must work together.
A good fixed guard also supports the job. It should allow necessary visibility, resist damage and make safe cleaning and maintenance possible. Poorly designed guards that block the task, collect waste or take too long to remove can encourage shortcuts. That does not excuse defeat; it signals a design and workflow problem that the employer must correct.
Do not drill access holes, cut mesh, remove fasteners or leave panels off after maintenance without a competent review. Seemingly small changes can create a new reach path or weaken containment.
Interlocked guards must control the hazardous movement
Where frequent access is necessary and a fixed guard is not practicable, an interlocked guard may be appropriate. HSE describes an arrangement that prevents the machine starting before the guard is closed and stops it if the guard is opened while the machine is operating. Resetting or closing the guard should not, by itself, restart the machine; restart should require deliberate action where appropriate.
The device, control system and stopping performance must match the risk. If dangerous movement continues after a stop command, guard locking or another engineered measure may be needed so access is delayed until the hazard has ceased. Safety functions need competent design and validation. Adding a domestic switch or relying on an unverified software condition is not a sound retrofit.
Treat bypassed, taped, misaligned or unreliable interlocks as a serious defect. Stop and make the equipment safe, control access and establish why defeat became normal. Production pressure, awkward loading, nuisance trips or a slow reset may explain behaviour, but they do not make continued unsafe use acceptable.
Review the machine in its real operating cycle.
HR + SAFETY can help North East SMEs assess machine access, guarding, operator checks and defect controls, then turn the findings into practical actions.
Discuss a machinery-safety reviewEmergency stops are supplementary protection
An emergency stop can reduce harm after danger develops; it does not stop someone reaching the hazard in the first place. It may also fail to remove every energy source or stop movement immediately. Position emergency controls so they are accessible and clearly identified, but never use their presence to justify missing or defeated guarding.
Jigs, holders and push sticks can help keep hands away where guards cannot provide complete protection. They must suit the material and task, be readily available and be replaced when damaged. Safe methods, information and supervision remain necessary, but they sit behind the higher-order controls in the PUWER hierarchy.
If access is needed for maintenance, fault-finding or blockage removal, the guarding assessment must connect with the equipment-specific isolation procedure. Opening a guard is not proof that electrical, pneumatic, hydraulic, mechanical or stored energy has been secured.
Inspect guards and act on defects
Operators should know the checks required before use: guards present and secure, interlocks functioning as intended, openings unchanged, safety devices unobstructed and no evidence of tampering or impact. The check must be defined for the machine; repeatedly opening an interlocked door during an uncontrolled cycle can itself introduce risk.
Competent inspection is also needed at intervals based on risk and after events that could affect safety, including repair, modification, relocation, collision or control-system work. Record defects, immediate precautions, repair ownership and successful return-to-service checks. A maintenance ticket marked complete is not enough if nobody verifies that the guard and safety function work correctly.
Review the assessment when production rate, tooling, product size, access method, staffing or control logic changes. Consultation with operators and maintainers often reveals reach paths, jams and workarounds that are invisible from the written procedure.
Machine-guarding checklist for managers
Legal requirements and official guidance were checked on 3 October 2026. Machine design and safety-control performance are technical matters; use a competent machinery-safety engineer where the correct guarding, interlock architecture or stopping arrangement is uncertain.
- List every machine and each production, setting, sampling, cleaning and foreseeable intervention task.
- Identify all crushing, shearing, entanglement, cutting, drawing-in, impact and ejection hazards.
- Apply the PUWER hierarchy and record why any higher-order measure is not practicable.
- Check reach over, under, around and through guards, including apertures and material feed points.
- Confirm fixed guards are robust, secure and removable only with a tool.
- Confirm interlocks and stopping performance suit the hazard and cannot be easily defeated.
- Require deliberate restart where appropriate; never rely on guard closure as the start command.
- Define pre-use checks, competent inspections and checks after repair or modification.
- Stop unsafe equipment, control access and verify repairs before return to production.
- Train operators and supervisors on defect reporting, prohibited workarounds and isolation boundaries.
Machine guarding should prevent access to dangerous parts before behaviour, warnings or emergency action are needed. Start with fixed guards, use properly engineered interlocked protection where access is necessary, check the real task and remove unsafe equipment from service until defects are controlled and verified.
This guide provides general information for UK employers. It is not legal advice and should not replace advice based on the facts of a specific matter.