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BS EN ISO 11148 — Hand-Held Non-Electric Power Tools Safety Requirements Series
Safety requirements for pneumatic, hydraulic and internal-combustion driven hand tools (supersedes BS EN 792)
📐 BS EN ISO 11148 is the UK adoption of EN ISO 11148, identical to ISO 11148, specifying safety requirements for hand-held non-electric power tools (tools powered by compressed air, hydraulic fluid or internal combustion), covering design, manufacture, information for use and inspection. The series supersedes the former BS EN 792 family and is organised into twelve parts by tool function: Part 1 covers assembly power tools for non-threaded mechanical fasteners, Part 10 compression tools, Part 11 nibblers and shears, and so on. It underpins CE and UKCA conformity assessment of pneumatic and hydraulic tools.
⚠️ This article concerns a scanned version, written based on public-domain knowledge. Parts 1, 10 and 11 are extracted from readable text; the remaining parts are summarised from the public-domain ISO 11148 body of knowledge. Specific clauses should be verified against the official BSI publication.
1. Series Overview and Scope 📌
The series applies to tools powered by an external energy source (gas, liquid or internal combustion) that can be held in the hand, including drilling, tapping, grinding, sanding, polishing, sawing, shearing, nibbling, riveting, crimping, fastening and impact-wrench types. Parts are organised by “functional category” rather than construction type, helping manufacturers classify their product. In addition to citing the general clauses, each part adds particular requirements for the inherent hazards of that tool type (rotating-part entanglement, reaction torque, nibbling blades, compression-jaw pinch, etc.).
Beyond mechanical hazards, the standard systematically covers pressure-system safety (hoses, fittings, pressure release), exhaust (exhaust-port position), vibration and noise emission declarations, dust and flying-particle protection, and the information the manufacturer must supply (manual, marking, warning symbols). It also verifies compliance with the essential health and safety requirements of the Machinery Directive 2006/42/EC.
2. Composition of the Series 📚
| Standard | Tool category | Main particular content |
|---|---|---|
| BS EN ISO 11148-1:2011 | Assembly tools for non-threaded fasteners | Clamping and triggering safety of riveting, stapling, joining tools |
| BS EN ISO 11148-2:2011 | Cutting-off and crimping tools | Blade guarding, crimp dies, reaction forces |
| BS EN ISO 11148-3:2012 | Drills and tapped tools | Chuck entanglement, feed control |
| BS EN ISO 11148-4:2012 | Percussive tools | Reaction torque, impact-energy control |
| BS EN ISO 11148-5:2011 | Rotary impact and impact wrenches | Socket ejection, reaction handle |
| BS EN ISO 11148-6:2012 | Assembly tools for threaded fasteners | Torque limiting and trigger control |
| BS EN ISO 11148-7:2012 | Grinders | Wheel speed and burst protection, guards |
| BS EN ISO 11148-8:2011 | Sanders and polishers | Abrasive clamping, dust-extraction interface |
| BS EN ISO 11148-9:2011 | Die grinders | Rotary-tool speed limiting and clamping |
| BS EN ISO 11148-10:2011 | Compression tools | Jaw closure, die-change safety |
| BS EN ISO 11148-11:2011 | Nibblers and shears | Blade guarding, swarf projection |
| BS EN ISO 11148-12:2012 | Small circular saws | Saw-blade guards, kickback protection and speed limiting |
3. Key Technical Requirements 🔧
1. Mechanical hazard protection
Part 1 defines common machinery-safety principles: rotating parts (chucks, spindles, wheels) must be guarded or contact-limited; tools with entanglement risk need emergency stop or automatic release; high-reaction-torque tools (e.g. impact wrenches) require a reaction handle or torque-limiting clutch. Each part gives quantified protective requirements for the specific hazards of that tool (guard opening size, blade gap, jaw closure pressure).
2. Pressure-system safety
Pneumatic tools must withstand the specified maximum working and burst pressures; the supply line carries pressure regulation and release; hoses and fittings conform to relevant pressure standards, and quick couplings must not release accidentally; exhaust-port direction must avoid blowing directly at the operator’s face or work surface (to prevent dust and coolant spray).
3. Vibration, noise and emissions
ISO 11148 requires the manufacturer to declare in the manual the vibration emission values measured per EN ISO 28927 and the noise emission values verified per ISO 4871; tools with dust or exhaust emissions (e.g. grinding, nibbling) must provide dust-extraction interfaces or prescribe extraction use to prevent occupational exposure.
4. Information for use and marking
Each part specifies minimum manual content: correct use, prohibitions (no overspeed, no guard removal), maintenance and inspection intervals, tightening torques, residual-risk notes and protective-equipment requirements; the tool body must carry maximum pressure/speed, manufacturer and model marks.
🚨 Safety note: “unintended start” and “hose whipping” are the most frequent accidents with pneumatic tools. Always shut off and depressurise the air supply before disconnecting hoses; always verify the maximum permitted speed before changing wheels/blades — wheel burst can cause severe injury.
4. Engineering Practice 🛠️
- 🔍 Selection check: identify the applicable part by tool function and verify the maximum working pressure/speed matches the workshop supply pressure.
- 🔧 Compressed-air system: install water/oil separation and pressure regulation so the supply stays within the tool’s rated range and no overpressure occurs.
- 📊 Routine inspection: periodically check hose ageing, fitting seals and guard integrity; lubricate and replace wearing parts per the manufacturer’s schedule.
- 📋 Workplace management: train operators, and satisfy noise and vibration exposure compliance (e.g. EU Vibration Directive 2002/44/EC).
5. Frequently Asked Questions ❓
❓ Q: How does BS EN ISO 11148 relate to the old BS EN 792?
A: BS EN ISO 11148 entirely supersedes BS EN 792 (with its A1 amendments), moving from the old pressure-category numbering to a new functional-category numbering unified under the ISO framework.
A: BS EN ISO 11148 entirely supersedes BS EN 792 (with its A1 amendments), moving from the old pressure-category numbering to a new functional-category numbering unified under the ISO framework.
❓ Q: Which part should a pneumatic impact wrench cite?
A: Impact wrenches belong to Part 5 “Rotary impact and impact wrenches” (ISO 11148-5); it must be used together with the Part 1 general requirements to form a complete declaration of conformity.
A: Impact wrenches belong to Part 5 “Rotary impact and impact wrenches” (ISO 11148-5); it must be used together with the Part 1 general requirements to form a complete declaration of conformity.
❓ Q: How does the series link to EN ISO 28927 (vibration measurement)?
A: ISO 11148 references the vibration-emission measurement methods of EN ISO 28927; the vibration values measured per the corresponding part go into the manual and feed exposure assessment under the EU Vibration Directive.
A: ISO 11148 references the vibration-emission measurement methods of EN ISO 28927; the vibration values measured per the corresponding part go into the manual and feed exposure assessment under the EU Vibration Directive.
🔍 Q: Are hydraulic tools (e.g. hydraulic crimpers) in scope?
A: Yes. Hydraulically driven non-electric hand-held tools are in scope; crimping/compression tools map to Part 10 and must also satisfy hydraulic pressure safety and leakage protection requirements.
A: Yes. Hydraulically driven non-electric hand-held tools are in scope; crimping/compression tools map to Part 10 and must also satisfy hydraulic pressure safety and leakage protection requirements.