A package turns at a transfer point and stops the line. The blockage looks reachable, production is waiting and the nearest stop button is within arm's length. Reaching through the guard may take seconds; the consequences of an unexpected belt movement can be permanent. Conveyor safety depends on more than an emergency stop. Employers must guard predictable access during production, define when isolation is required and control the full sequence from shutdown to restart.
Map the conveyor as a complete system
Start at the feed point and follow the material to discharge. Identify head and tail drums, drive units, return rollers, tensioning devices, tracking rollers, transfer points and every place where a moving belt, roller, chain or product approaches a fixed structure. Include underside and elevated sections that may be reached from floors, steps, platforms or adjacent equipment.
The most obvious in-running nip is where a belt meets a drum, but trapping can also occur between rollers, at side guides, scrapers, chutes and powered transfers. Consider drawing-in, entanglement, crushing, impact, falling material and the release of tensioned components. A guard at the motor does not control a reachable tail drum further down the line.
Observe real work rather than only the designed production cycle. Operators may straighten products, retrieve labels, clear accumulated material, adjust guides, clean under the belt or investigate a sensor. HSE's machinery guidance treats these foreseeable interventions as part of the risk assessment. A task being brief or familiar does not make reaching into a danger zone safe.
Guard the danger point during normal operation
PUWER regulation 11 requires effective measures to prevent access to dangerous machinery parts or stop their movement before a person enters the danger zone. Its hierarchy starts with fixed guards where practicable, followed by other guards or protection devices. Information, training and supervision sit lower in the hierarchy and cannot replace a practicable physical safeguard.
For conveyors, a fixed guard may enclose a drum, drive or return roller and require a tool for removal. Where frequent access is genuinely necessary, a suitably designed interlocked guard may be appropriate. Openings, mesh size and distance from the hazard must work together: a panel that looks robust may still allow fingers, an arm or a cleaning tool to reach the nip.
Guard design must suit the operation. HSE notes that lift-out rollers can remove some trapping points and that interlocked guards can support frequent hygienic cleaning. The correct solution depends on the machine, stopping performance and access need. Treat cut mesh, missing fasteners, misaligned interlocks and guards routinely left open as defects requiring prompt control, not accepted production conditions.
Treat pull wires and emergency stops as supplementary
A pull wire or emergency stop can help limit harm after a dangerous situation develops. It does not prevent access to the nip point, isolate energy or guarantee an immediate stop. HSE's quarry guidance is explicit that conveyor pull wires are additional protection rather than an alternative to fixed guarding.
Position and maintain emergency devices so they can be reached from the relevant working area and operate as intended. A pull wire should cover the required conveyor length and function when pulled in the directions specified by the design. Define a safe test method and act on slack, damage, missing supports or a failed reset.
Do not use the emergency-stop circuit as the routine method for cleaning or clearing jams. Someone elsewhere may reset it, a control fault may issue a start command, and mechanical or gravity energy may remain. The intervention procedure must state when the conveyor needs full isolation and lock-off.
Make blockage removal a planned intervention
List the blockages and misfeeds the process can reasonably create, then define the safe response for each. The operator should know when a normal control can safely reject a product, when the whole line must stop and when an authorised person must isolate it. A generic instruction to use care leaves the critical decision at the moment production pressure is highest.
Where hands, tools or any part of a person could enter the hazardous area, stop and isolate the relevant equipment from all energy sources. PUWER regulation 19 requires suitable, identifiable and accessible means of isolation where appropriate. Secure the isolation against reconnection, control stored energy and verify the safe state before starting work.
Consider linked equipment. Isolating one belt may leave an upstream feeder, downstream conveyor, pneumatic diverter or gravity chute able to move material into the work area. Tensioned belts, raised sections, counterweights and trapped product can move when the obstruction is released. Use the right tools from a safe position and restrain anything that could fall or move.
PUWER 1998: regulation 19 ↗ · Related guide: safe isolation of work equipment →
Turn a rushed intervention into a controlled procedure.
HR + SAFETY can help map conveyor hazards, review guarding and build a practical isolation and restart sequence with your team.
Discuss a conveyor-safety reviewDesign cleaning and spillage control around safe access
Spillage beneath a conveyor can turn an unsafe intervention into a daily routine. Reduce leakage through suitable skirting, guides, scrapers, transfer design and maintenance. Provide collection points and access that allow material to be removed without working beside unguarded moving parts or using a shovel close to a tail drum.
HSE requires a formalised safe system for routine conveyor cleaning in food production so workers are not exposed to unguarded moving parts. Apply the same task-based principle in warehouses, recycling, packaging and other sectors. Define what may be cleaned while the conveyor operates, if anything, and the engineered controls that make it safe. Put all intrusive cleaning behind isolation.
Cleaning fluids, pressure washing and repeated guard removal can affect interlocks, bearings and electrical equipment. Include those effects in the inspection and maintenance plan. If a guard is removed, control the work and require it to be replaced and checked before the conveyor is returned to service.
HSE: managing conveyor cleaning hazards ↗ · HSE: maintenance of work equipment ↗
Control inspection, testing and restart
Define operator checks for the actual system: guards secure, interlocks and emergency devices apparently intact, pull wires correctly tensioned, no abnormal tracking or noise, transfer points clear and no accumulating material that encourages access. Operators should report defects and have authority to stop the line. Do not ask them to test safety devices in a way that creates exposure.
Competent inspection should also cover deterioration, modification and repair. PUWER requires maintenance in an efficient state, in efficient working order and in good repair. Review guards and safety functions after impacts, control work, relocation, changes to product size or production rate, and whenever a jam or workaround reveals a new access route.
Before restart, replace and secure guards, remove tools and temporary restraints, account for everyone and warn affected people. Check connected conveyors and automatic sequences, then use a deliberate restart control. If testing needs power, plan it as a separate controlled state with the minimum necessary exposure, followed by re-isolation before further intrusive work.
Conveyor-safety checklist for managers
Official HSE guidance and PUWER regulations 11, 19 and 22 were checked on 10 November 2026. Conveyor design and safety-control performance are technical matters; use a competent machinery-safety specialist where the guarding, stopping arrangement or isolation boundary is uncertain.
- Map every conveyor, connected machine, access level and foreseeable intervention.
- Identify head and tail drums, drives, return rollers, transfer points and other reachable nips.
- Use fixed guards wherever practicable and verify that openings and distances prevent reach.
- Treat pull wires and emergency stops as supplementary protection, not guarding or isolation.
- Write task-specific methods for jams, misfeeds, cleaning, tracking and maintenance.
- Isolate linked equipment and control electrical, pneumatic, hydraulic, stored and gravity energy.
- Provide suitable tools, safe access and restraints for material or components that may move.
- Define operator checks, competent inspections and prompt defect escalation.
- Replace and verify every guard before deliberate, communicated restart.
Guard every reachable conveyor danger point during production, and treat any reach into the system as a planned intervention. Stop, isolate, control stored energy, verify the safe state and restore every safeguard before restart.
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.