Short answer: a pneumatic-breaker vibration or noise figure is useful in an RFQ only when the supplier identifies the exact model, test standard and edition, operating setup, declared value, uncertainty and report traceability. Buyers should not rank breakers from a single unlabeled m/s² or dB number. Laboratory emission values help compare like-for-like machines; they do not, by themselves, predict a worker’s daily exposure on every site.
For mines, quarries, demolition contractors and distributors, the practical buying objective is to obtain comparable evidence before quotation, then define what will be checked on the supplied model. The site still has to assess real exposure from the actual material, tool condition, air supply, operator technique and trigger time.
First separate emission data from workplace exposure
Emission describes the vibration or airborne noise produced by a machine under a defined test method. Exposure describes what a worker receives during real work over time. The two are related, but they are not interchangeable.
A declared vibration emission value can support comparison between similar breakers tested under the same or comparable method. Daily hand-arm vibration exposure also depends on how long the operator is actually gripping a running tool and on the vibration magnitude during the task. Noise exposure likewise depends on the workplace, distance, reflected sound, simultaneous equipment and duration.
The UK Health and Safety Executive’s hand-arm vibration guide INDG175 notes that manufacturer emission information may not always be suitable for estimating exposure and should be checked with the manufacturer or supplier. Its exposure action and limit values apply within the UK regulatory framework; overseas buyers must use the limits and assessment rules that apply at their own site.
What a complete vibration declaration should contain
For a handheld pneumatic breaker, buyers will commonly encounter a frequency-weighted vibration acceleration value expressed in metres per second squared (m/s²). A number without context is incomplete. Request the following fields as one controlled data set:
| RFQ field | Why it matters | Buyer check |
|---|---|---|
| Exact breaker identity | A value for another weight class, handle or suffix is not evidence for the quoted machine. | Model, suffix, mass configuration, serial or report sample ID |
| Declared vibration value | This is the central emission result used for comparison. | Quantity, unit and whether it is a total value or another stated metric |
| Uncertainty | Two values that look different may not be meaningfully separable without their uncertainty. | Symbol, value, unit and how it is applied |
| Test code and edition | Results are comparable only when the test basis and conditions are compatible. | Full standard number, part and year |
| Operating setup | Air pressure, tool, test material and handle arrangement influence the result. | Test tool, air conditions, fixture/material and operating mode |
| Test traceability | A generic catalogue line cannot be tied to a delivered model or report. | Report number, date, laboratory and sample identification |
ISO 28927-10 covers a vibration-emission test method for percussive drills, hammers and breakers. The RFQ should name the edition actually used; do not write only “tested to ISO” or assume that a report for an electric demolition hammer applies to a pneumatic breaker.
What a complete noise declaration should contain
Noise specifications often mix quantities that answer different questions. A-weighted emission sound pressure at an operator position, A-weighted sound power and C-weighted peak sound pressure are not alternative names for one number. Ask the supplier to label each declared quantity and its uncertainty.
- Emission sound pressure level describes sound at a defined workstation or measurement position under the test conditions.
- Sound power level describes acoustic energy emitted by the source and is useful for machine comparison and workplace prediction.
- Peak sound pressure addresses high instantaneous peaks and must not be confused with an averaged A-weighted value.
ISO 15744 is a noise measurement code for hand-held non-electric power tools. In the RFQ, require the standard and edition, the declared quantities, operating conditions and uncertainty. HSE’s L108 guidance on controlling noise at work explains why manufacturers’ noise data should reference the test code and why different machines should be compared only under the same or comparable conditions.
Do not rank quotations from the lowest headline number
A procurement table that contains only “vibration” and “noise” invites false precision. Before ranking, normalize the evidence.
- Match the machine. Confirm that the declaration belongs to the quoted breaker model, handle and configuration.
- Match the quantity. Compare vibration with vibration, sound pressure with sound pressure and sound power with sound power.
- Match the method. Check the same standard, part and edition, or obtain an engineering explanation of any difference.
- Read the uncertainty. Do not ignore the associated K or uncertainty value.
- Compare intended use. Check whether the test tool, material and operating mode reasonably represent the planned work.
- Review residual-risk instructions. Look for maintenance, operating and exposure-control information, not just a low number.
If these fields cannot be aligned, record the comparison as conditional. A supplier that provides a traceable, complete declaration may be a lower procurement risk than one offering a smaller number with no method or report identity.
Build a test-evidence hierarchy into the RFQ
| Evidence level | What it can support | Main limitation |
|---|---|---|
| Catalogue figure only | Early screening | May omit uncertainty, method and model configuration |
| Signed model declaration | Commercial comparison when method and units are complete | Underlying test details may still be unavailable |
| Traceable test report | Technical review of specimen, setup, results and uncertainty | Laboratory conditions still differ from many jobsites |
| Buyer-witnessed or independent test | Verification against an agreed acceptance protocol | Requires controlled method, competent personnel and calibrated instruments |
| Site exposure assessment | Planning controls for the actual task and workforce | Not a substitute for standardized product-emission evidence |
Specify the evidence level before bids arrive. If independent testing is required, define who appoints the laboratory, which standard applies, how samples are selected, who pays, what constitutes a valid result and how a disputed result will be resolved.
Why a declared value cannot set a universal trigger-time limit
A common buyer question is: “How many hours can an operator use this breaker?” The RFQ cannot provide one universal answer. Daily vibration exposure depends on the vibration magnitude that applies to the real task and the actual time the hands are exposed. Trigger time is not the same as shift length: breaks, positioning, material removal and hose handling may not involve a running tool.
HSE’s INDG175 lists a daily exposure action value of 2.5 m/s² A(8) and a daily exposure limit value of 5 m/s² A(8) for the UK framework. These are evidence-backed legal values for that jurisdiction, not global purchasing targets. The guide also warns that manufacturer data may not always be suitable for exposure estimation. A site outside the UK must use its applicable law and competent occupational-hygiene method.
The same caution applies to noise. A laboratory emission sound-pressure value is not the worker’s personal daily noise exposure. Nearby compressors, reflective walls, multiple breakers, confined areas and task duration can materially change workplace exposure.
Define receiving and sample-approval checks
Most receiving teams cannot reproduce a standards laboratory. They can still verify whether the supplied evidence matches the delivered machine:
- confirm model, suffix, handle type and ordered configuration;
- match serial or batch references to the declaration or approved sample;
- check that manuals contain the quoted vibration and noise information;
- record the test standard, edition, values and uncertainties in the asset register;
- verify maintenance and air-supply conditions needed to sustain performance;
- inspect anti-vibration mounts, grips and fasteners for transit damage;
- hold the lot if the report refers to a different configuration or omits required fields.
A quick sound-level reading beside an unpacked machine is not a substitute for the declared test. Likewise, a phone application is not an acceptance instrument. Any witnessed verification must use competent personnel, calibrated equipment and the agreed protocol.
Common RFQ mistakes
- Requesting “lowest vibration” without naming a test code.
- Comparing a declared vibration value that includes uncertainty with one that does not.
- Mixing sound pressure, sound power and peak noise in one ranking column.
- Accepting a report for a similar model, handle or power source.
- Treating laboratory emission as guaranteed jobsite exposure.
- Using shift duration as trigger time without observing the task.
- Ignoring the effect of tool wear, poor lubrication, loose parts and unsuitable air supply.
- Writing a pass/fail limit without specifying sample selection and test uncertainty.
Copy-ready RFQ checklist
For each quoted pneumatic breaker model, request:
- full model, suffix, handle and mass configuration;
- declared hand-arm vibration magnitude, unit and uncertainty;
- vibration test standard, part and edition;
- declared emission sound pressure, sound power and peak value where applicable, each with unit and uncertainty;
- noise test standard and edition;
- air pressure and flow conditions used during the tests;
- test tool, test material or fixture and operating mode;
- laboratory, report number, date and specimen identity;
- instructions for safe use, maintenance and residual vibration/noise risk;
- sample-approval and independent-test procedure, if required;
- accept, hold and reject rules for missing or conflicting evidence.
Integrate these fields with the broader pneumatic breaker package RFQ checklist, which covers the compressor, hose, lubricator, chisel and spare package.
Frequently asked questions
Is the lowest declared vibration value always the best choice?
No. First confirm that the models were tested under the same or comparable standard, edition, configuration and operating conditions, and review the uncertainties. Suitability, productivity, maintainability and real task exposure also matter.
What does the uncertainty value mean in a breaker declaration?
It expresses uncertainty associated with the declared emission result under the specified method. It should remain attached to the central value when comparing quotations or writing an acceptance protocol; it is not an optional footnote.
Can manufacturer vibration data be used to calculate daily exposure?
Sometimes it can support an initial estimate, but only if the data are suitable and representative of the intended task. HSE specifically advises checking whether supplied emission information is suitable for exposure estimation. Site measurement or other competent evidence may be necessary.
Should an RFQ ask for sound pressure or sound power?
Ask for all quantities required by the applicable rules and useful to the project. Sound pressure at a defined operator position helps describe local emission; sound power supports source comparison and prediction. They must not be treated as the same metric.
Can receiving inspection verify the supplier’s vibration and noise claims?
Receiving inspection can verify identity, documentation and condition. Reproducing an emission test requires the correct standard, setup, calibrated instruments and competent personnel. If that verification is commercially necessary, define an independent or witnessed test before ordering.
Make vibration and noise evidence part of model selection
PerfoMax supplies active pneumatic-breaker options including the TPB60 pneumatic breaker and B87C pneumatic breaker. Model selection still requires confirmation of the application, air supply, tool interface and documentation package.
Review the pneumatic breakers and picks range, then send the required test standard, declaration fields, evidence level, quantity, destination market and acceptance plan through the request-a-quote form. A clear RFQ makes vibration and noise evidence comparable before the order—not after the tools arrive.