Why it matters

Machines do not stop for fingers. The WSH Council says machinery accidents are a leading cause of major workplace injuries in Singapore. Most of them end in amputation.

The pattern repeats. A worker gets struck, crushed, caught or cut by a moving part. It often happens during a quick fix: clearing a jam, wiping a roller or adjusting a blade while the machine runs.

Know the danger zones

Walk round each machine with the operator. Point out every place a body part could get hurt. Look at three areas in particular.

  • The point of operation. This is where the machine cuts, presses, shapes or mixes.
  • The power transmission. Belts, pulleys, chains, gears, shafts and flywheels.
  • Other moving parts. Feed rollers, reciprocating arms, rotating chucks and stock bars on lathes.
Look for nip points

Wherever two parts meet and one moves, there is a nip point. Belts on pulleys and in-running rollers are the classic ones. Mark them during your walk round.

Order of controls

The WSH Council urges firms to start with the machine itself, not the worker. Work down this list.

  • Remove the contact. Automate loading and unloading where you can. Fewer hands near the machine means fewer injuries.
  • Buy safer. Choose machines with no reachable moving parts or with limited force.
  • Guard it. Fit fixed guards on parts you never need to reach. Use interlocked guards where access is regular, so opening the guard stops the machine.
  • Add devices. Light curtains, presence detectors, two-hand controls and emergency stops back up the guards.
  • Set the rules. Write safe work procedures. Train and authorise operators. Lock out for maintenance.
  • PPE last. Eye and hearing protection help. Gloves near rotating parts can drag a hand in, so check the procedure first.

Guards that stay on

A guard only works if it is in place. Check each one at the start of the shift. It should be fixed firmly, undamaged and need a tool to remove.

Test interlocks. Open the guard and confirm the machine stops or will not start. A taped-down switch or a bent bracket means someone has been working around it. Find out why. Usually the guard gets in the way of a regular task, and the fix is a better guard.

Ask the supplier or manufacturer for a custom guard when the standard one does not suit. Never let the crew build their own makeshift cover.

Lock out before you reach in

Clearing jams, cleaning and repair are the riskiest moments. The machine is open and a person is inside the danger zone. The fix is lock-out/tag-out (LOTO).

Find every energy source first. That means electrical supply as well as compressed air, hydraulics, springs and gravity. Isolate each one and fit a personal lock and tag. Release stored pressure and block parts that could drop. Then try to start the machine and confirm nothing moves.

Use a group lock box or hasp when several people work on one machine. For cord-and-plug machines, a plug lockout box stops anyone plugging it back in.

Off is not safe

A machine that has stopped is not a safe machine. Sensors, timers and remote controls can start it again. Only a locked isolator makes it safe.

What the rules require

The WSH (General Provisions) Regulations set the core duties for the occupier in Singapore. Regulation 12 says every dangerous part of a generator, motor, transmission machinery or other machinery must be securely fenced. The exceptions are parts safe by their position or construction, or made safe by other effective means. Transmission machinery also needs a device that cuts power quickly. Stock bars sticking out past a lathe headstock must be fenced.

Regulation 15 requires guards to be of substantial construction and properly maintained. They must stay in position while the parts move.

Regulation 13 allows a guard off a moving machine only for narrow tasks. Examples are an examination, or lubrication or adjustment that the examination shows must happen while it runs. Strict conditions apply. The worker must be at least 18, trained in the dangers and wearing close-fitting clothing with no loose ends. A second person who knows the emergency steps must be within sight or hearing.

Regulation 16 requires lock-out procedures for inspection, cleaning, repair and maintenance. Workers must be fully instructed on them before starting.

Since 1 January 2025, MOM has added more higher-risk machines to the Fifth Schedule of the WSH Act. The list includes lathes, milling machines, sheet benders and rollers. It also covers industrial cutting, packaging, mixing and food-processing machines. Manufacturers, suppliers, installers and modifiers of these machines now carry WSH Act duties for their safe design and use.

Legal requirement

Dangerous parts of machinery must be securely fenced, and the fencing kept in position while the parts are in motion. Source: WSH (General Provisions) Regulations, regs 12 and 15.

Common mistakes

  • Reaching in to clear a jam with the machine still running.
  • Leaving a guard off after maintenance because the job ran late.
  • Bypassing an interlock to save time on a repeat task.
  • Wearing gloves, loose sleeves, lanyards or jewellery near rotating parts. Tie back long hair.
  • Letting an untrained worker cover for an absent operator.
  • Pressing stop and calling it isolation.
The quick fix

Most amputations happen during a job that takes ten seconds. Lock out every time, even for a ten-second job.

Training and authorisation

Keep a list of who may run each machine. Only trained, authorised people go on it. Train them on the hazards, the guards, the emergency stop and the lock-out steps for that machine.

Watch new operators on their first shifts. Check they follow the safe work procedure, not a shortcut learnt from a colleague. Restrict repair work to trained maintenance technicians and keep preventive maintenance on schedule. A well-kept machine jams less, so people reach in less.

In other countries

  • Indonesia: Machinery safety falls under Permenaker No. 38 of 2016 on K3 for power and production equipment (pesawat tenaga dan produksi). It covers operating standards, operator qualifications, and inspection and testing. It replaced PER.04/MEN/1985.

Use it on site: the machinery safety checklist and the toolbox talk to brief your crew.

Sources

  1. About Machines, WSH Council.
  2. Workplace Safety and Health (General Provisions) Regulations (copy hosted by NUS), Ministry of Manpower (via NUS).
  3. The WSH Council Calls for Greater Vigilance on Machinery Safety in the Manufacturing Sector, WSH Council.
  4. Enhanced safety measures for higher-risk machinery and combustible dusts from 1 January 2025, Ministry of Manpower.
  5. WSH Insights: Working Safely with Machines: Strengthening Lockout Tagout Practices (April 2026), WSH Council.
  6. Safety and health in the use of machinery (code of practice), ILO.
  7. Peraturan Menteri Ketenagakerjaan Nomor 38 Tahun 2016 tentang K3 Pesawat Tenaga dan Produksi, Kemnaker (JDIH).

This is practical guidance, not legal advice. Laws and codes of practice change; always check the current official text and your site's own procedures.