3D CMM Dimensional Inspection of Machined Components
We provide 3D CMM dimensional inspection of machined components on a coordinate measuring machine within the scope of our ISO/IEC 17025 accreditation.
As an accredited testing laboratory by the Slovak National Accreditation Service (SNAS) in the field of length and plane angle, we perform traceable dimensional inspection on CMM according to clearly defined methods and measurement uncertainties.
- Verify critical dimensions of prototypes and series components
- Compare measured values with drawing tolerances and GD&T requirements
- Document dimensional conformity for customers and audits
- Support stable and capable production processes
What is CMM Dimensional Inspection?
CMM dimensional inspection is 3D measurement and evaluation of machined components on a coordinate measuring machine (CMM).
Using a probing system, the CMM measures distances, diameters, positions and angles between features, evaluates geometric relationships between surfaces and axes, and compares the measured values with nominal data from the technical drawing or CAD model.
- Documented measurement procedures
- Defined measuring range and expanded measurement uncertainty
- Traceability of measurements to SI units
- Carried out according to ISO/IEC 17025 within the accredited scope
Scope – What We Inspect on CMM
Machined Components
Types we inspect
Milled and turned components
Precision machined parts with tight dimensional requirements
Prismatic components
Parts with hole patterns and bores
Rotational components
Shafts, bushings, rings and similar parts
Mould and tool components
Parts with defined reference surfaces
Fixtures and jigs
Parts with datums and functional features
For special shapes or larger dimensions, we check feasibility based on the CMM measuring volume defined in our scope.
Dimensional & Geometrical Characteristics
Length & plane angle
Linear dimensions
Lengths, widths, heights, distances between features
Diameters and cylindrical features
Holes, shafts, pitch circles, bolt patterns
Angular relationships
Angles between surfaces or axes
Datums and positions
Position of features relative to datums and coordinate systems
Form and orientation
E.g. flatness, parallelism, perpendicularity as part of dimensional evaluation
When to Use CMM Dimensional Inspection
When Is CMM Inspection the Right Choice?
- Tight tolerances – manual gauges are not sufficient to verify dimensions reliably
- Complex geometry – multiple datums, patterns, intersecting features require 3D measurement
- Independent confirmation – you need external verification of in-house measurement results
- Documented reports required – your customer requires dimensional reports from an accredited laboratory
Common Applications
- Prototype and first article inspection – validation of new tools, programs and processes
- Pre-series and series inspection – periodic dimensional checks to support capability studies and SPC
- Customer or supplier claims – independent verification of dimensions in case of disagreement
- Audit and certification support – evidence for your quality management system
How CMM Dimensional Inspection Works
Enquiry and Definition of Scope
- You send us a description of the component and technical drawing (optionally CAD model)
- We clarify which dimensions and characteristics must be measured and how results should be reported
- We confirm the task is within our accredited scope and prepare a quotation
Delivery of Components and Documentation
- You deliver or ship the components to our laboratory
- You provide the drawing(s) and any special requirements (e.g. datum setup, clamping, orientation)
- We check completeness and alignment between physical components and documentation
Measurement Plan and Fixturing
- Our metrologists create a measurement plan: selection of datums, probing strategy, number of measured points, evaluation rules
- We prepare suitable fixturing to ensure stable and repeatable positioning on the CMM
CMM Dimensional Inspection
- The component is measured on the coordinate measuring machine according to the prepared plan
- Measurements are carried out using verified and traceable CMM procedures, within the measuring range and uncertainty defined in our scope
Evaluation and Verification Against Tolerances
- Measured values are compared with nominal dimensions and tolerances from the drawing
- For GD&T characteristics, evaluation follows relevant standards and the specified datum system
- Any non-conformities are clearly highlighted in the results
Reporting and Delivery
- We issue a CMM inspection report with all required information and evaluations
- Components are returned to you by collection or by shipment as agreed
Reporting & Documentation
CMM dimensional inspection report
Each job is documented in a clear, audit-ready report. A typical report includes:
- Identification of the component (part number, drawing number, revision, batch),
- Identification of the measurement task and the CMM used,
- Description of datums and coordinate systems used for evaluation,
- List of measured characteristics (dimensions, positions, angles, GD&T features),
- Measured values, deviations from nominal and tolerance status (pass/fail),
- Optional graphical representation of results (tables, diagrams) if required.
When the inspection is carried out within our accredited scope, the report is issued in line with ISO/IEC 17025 requirements.
Use in your quality system
CMM dimensional inspection reports can be used as:
- Part of documentation for customer approvals and PPAP
- Evidence for internal and external audits
- Inputs for process capability studies and optimisation
- Supporting documents in supplier–customer communication
Reporting & Documentation
Kalibra s.r.o. is accredited by the Slovak National Accreditation Service (SNAS) as:
- Calibration laboratory – calibration of length and plane angle measuring instruments,
- Testing laboratory – dimensional inspection on a coordinate measuring machine within the defined scope.
Our competence is based on fulfilling the requirements of ISO/IEC 17025:2017.
The accreditation scope defines:
- The measuring range of our CMM,
- The associated expanded measurement uncertainty,
- And the conditions under which our CMM measurements are accredited.
Request a CMM Dimensional Inspection Quote
- Define a suitable measurement plan
- Clarify which characteristics must be inspected
- Align reporting with your customer and audit requirements
You can also contact us directly by phone or email to discuss your components, tolerances and possible dates for CMM dimensional inspection in our laboratory.
FAQ
How do I request CMM dimensional inspection?
To request CMM dimensional inspection, please send us:
- Number and type of machined components,
- Drawing(s) in PDF (and optionally CAD data),
- List of required dimensions / characteristics or simply mark them on the drawing,
- Any customer-specific or standard-specific requirements,
- Your desired completion date.
We will assess feasibility, check whether the task falls under our accredited scope, and prepare a quotation with an indicative lead time.
How should I prepare and send components?
- Ensure components are clean and free from chips, coolant and heavy oil.
- Protect sensitive and functional surfaces during transport (e.g. with protective sleeves or packaging).
- Clearly label the components if multiple variants or batches are included.
- Always include the correct drawing and revision that should be used for evaluation.
Components can be delivered in person or sent by courier service to our laboratory address.
What is the typical lead time?
The lead time for CMM dimensional inspection depends on:
- Number of components,
- Complexity of geometry and number of characteristics to be measured,
- Required depth of reporting,
- Current laboratory workload.
We provide an estimated completion date in the quotation or order confirmation. If you have an urgent request or a fixed deadline (e.g. audit, shipment date), mention it in your enquiry so we can check what is realistically achievable.
Can CMM dimensional inspection be combined with calibration?
Yes. Many customers combine CMM dimensional inspection with:
- Dimensional calibration of gauges and measuring instruments in our calibration laboratory,
- On-site calibration & machine verification for machine tools.
This way you can ensure that:
- Your measuring equipment is calibrated,
- Your machines are verified, and
- Your machined components are independently inspected
— all with one specialised dimensional metrology partner.