Safe Working in the Workshop
Why Safe Working Matters
Engineering workshops contain real risks: rotating machinery, sharp tools, hot flames, electrical equipment and heavy materials. Every year people are seriously injured in workshops through unsafe practice. Safe working is not an add-on to engineering — it is a fundamental part of the engineer’s job. In a professional engineering company, failure to follow safe working procedures can result in criminal prosecution under health and safety law. In a school or college workshop, the same principles apply.
The legal framework for workplace health and safety in Great Britain begins with the Health and Safety at Work Act 1974. This Act places a duty on employers to ensure, so far as is reasonably practicable, the health, safety and welfare of their employees. It also places duties on employees to take reasonable care of themselves and others, and to cooperate with their employer’s safety arrangements. Two important sets of regulations made under this Act are the Provision and Use of Work Equipment Regulations 1998 (PUWER) and the Personal Protective Equipment at Work Regulations 1992.
A risk assessment is a systematic process with three stages: (1) identify the hazards; (2) assess the risk (likelihood and severity of harm); (3) decide and implement control measures. You must be able to distinguish between a hazard and a risk — they are not the same thing.
Hazard and Risk: The Critical Distinction
A hazard is anything with the potential to cause harm. A spinning lathe chuck is a hazard. A bottle of solvent is a hazard. A trailing power cable on the workshop floor is a hazard. The hazard exists regardless of whether anyone is actually harmed.
Risk is the combination of two factors: how likely is it that the hazard will actually cause harm, and how severe would that harm be? A spinning lathe chuck has a high severity (the injury would be serious) but a lower likelihood if the operator is trained and the guard is in place. A risk assessment evaluates both factors together. A risk that is highly likely and would cause severe injury requires urgent control measures; a risk that is unlikely and would cause only minor harm may be managed with a simple safety rule.
Task: Drill a 10 mm hole in a piece of mild steel using a pillar drill.
Step 1 — Identify hazards:
• Rotating drill bit (contact causes lacerations or amputation).
• Workpiece snagging and spinning (impact injury to hands and body).
• Metal swarf/cuttings ejected from the hole (eye injury).
• Loose clothing or hair drawn into the spindle (entanglement, severe injury).
• Noise from machine operation (hearing damage with prolonged exposure).
Step 2 — Assess risk (likelihood × severity for each):
Workpiece spinning: HIGH severity (broken bones, lacerations), HIGH likelihood if not clamped → HIGH risk. Must be controlled before work begins.
Eye injury from swarf: MEDIUM severity (could cause permanent eye damage), MEDIUM likelihood without eye protection → MEDIUM-HIGH risk.
Step 3 — Control measures:
• Clamp the workpiece in a machine vice secured to the drill table — reduces the risk of the workpiece spinning if the drill bit snags.
• Wear safety goggles — reduces the risk of eye injury from swarf.
• Tie back long hair; tuck in loose clothing and remove jewellery — reduces the risk of entanglement.
• Ensure the drill guard is in position before switching on — reduces contact risk with the rotating bit.
• Remove the chuck key before switching the machine on — eliminates chuck-key ejection hazard.
The Hierarchy of Control Measures
Control measures are ranked in a hierarchy of control from most effective to least effective. The hierarchy must be applied in order: always seek the highest-level control measure possible before resorting to a lower one.
- Elimination — remove the hazard entirely. If a task can be redesigned so that the hazard does not exist, this is always the best option. For example, if a chemical solvent is not needed for a task, not using it eliminates the hazard.
- Substitution — replace the hazard with something less dangerous. Replace a highly toxic solvent with a less hazardous cleaning agent. Replace a sharp metal burr with a plastic edge protector.
- Engineering controls — use physical barriers or design changes to separate people from the hazard. Machine guards, interlocks (the machine cannot start with the guard open), extraction systems for fumes and dust, and Local Exhaust Ventilation (LEV) are all engineering controls. They are built into the machine or the workplace — they do not depend on the operator remembering to do something.
- Administrative controls — use rules, training, signage and working procedures to reduce the likelihood of harm. Safe operating procedures, induction training, warning signs and permit-to-work systems are administrative controls. They rely on people following rules, which makes them less reliable than engineering controls.
- Personal Protective Equipment (PPE) — provide protective equipment such as safety goggles, gloves, ear defenders, safety footwear and overalls. PPE is the last line of defence — it protects only the individual wearing it and does nothing to reduce the hazard itself. It should be used in conjunction with higher-level controls, not as a substitute for them.
Personal Protective Equipment (PPE) is always the last resort in the control hierarchy, not the first. Recognise that putting on goggles is less effective than fitting a machine guard. A top-band answer will state the hierarchy principle, not just list PPE items.
Common PPE in a Workshop
Different tasks require different PPE. Choosing the correct PPE for the task is a skill in itself. Safety goggles protect eyes from swarf, chips and chemical splashes; face shields provide greater coverage for grinding operations. Ear defenders reduce the risk of hearing damage in noisy workshops. Gloves protect hands from cuts and chemical exposure, but must not be worn when using a lathe or drill — they can snag on the rotating parts and pull the hand in. Heat-resistant gloves are needed when brazing or welding. Safety footwear (steel toe-capped boots) protects against dropped materials. Overalls or workshop coats keep loose clothing away from machinery.
Lathe: Never use a file on a rotating lathe workpiece by holding the file in both hands across the rotating part — this risks the file snagging and pulling your arm into the lathe. Remove all swarf with a brush, not by hand. Ensure the chuck guard is in place. Never wear gloves when operating a lathe.
Pillar drill: Always clamp the workpiece — never hold it by hand. Remove the chuck key before switching on. Lower the guard before starting. Wear goggles. Keep hands clear of the spindle during operation.
Brazing hearth: Work in a well-ventilated area or use LEV (extraction) to remove brazing fumes, which can be harmful if inhaled. Wear appropriate eye protection (tinted goggles or a face shield). Use heat-resistant gloves when handling hot workpieces. Allow workpieces to cool fully before handling with bare hands — hot metal looks the same as cold metal.
Bandsaw: Keep fingers well clear of the blade. Use a push stick for narrow pieces. Do not attempt to back out of a cut while the blade is running. Ensure the blade guard is set as close to the workpiece as practicable to minimise the exposed blade length.