Service · CMM Inspection

±0.002 mm precision.
GD&T compliant.
Zeiss CMM.

CMM (Coordinate Measuring Machine) inspection services. Zeiss precision CMM for ±0.002 mm dimensional verification. Full GD&T evaluation, surface profile, position tolerance, runout, concentricity. Reports in customer format.

CMM Inspection Quote First article inspection

Zeiss precision CMM ±0.002 mm capable AS9102 reports NIST traceable

01 · CMM capabilities

What CMM measures.

CMM measures part features in 3D space with high precision. Different feature types require different measurement strategies.

Linear dimensions

Length, width, height

Standard linear dimensions verified with CMM probe touch points. Multiple points for repeatability.

Hole diameter / position

GD&T position

Hole diameter via best-fit circle from probe points. Position vs datum reference frame per GD&T spec.

Surface flatness

Multi-point sampling

Probe many points across surface, fit plane, measure deviations. Specifies max valley-to-peak deviation.

Parallelism

Two-surface relationship

Compare two surfaces — must remain within parallel tolerance over full length.

Perpendicularity

To datum surface

Surface perpendicular to datum within tolerance. Common for mating faces.

Position tolerance

Feature center to datum

Position of feature center relative to datum reference. With or without MMC modifier.

Concentricity / runout

Cylindrical features

Axes coaxial, or surface runout within tolerance. Critical for rotating components.

Profile tolerance

Complex 3D surfaces

Compare actual surface to nominal CAD surface. Used for blade profiles, complex curves.

Compound angles

3D angular relationships

Angular relationships between features at any 3D orientation. Common for aerospace mounting features.

02 · CMM workflow

CMM measurement process.

Drawing review

Identify all features for measurement, GD&T datum scheme

CMM programming

Create part-specific CMM program (1-3 hours typical for complex parts)

Calibration verification

CMM calibration verified per metrology procedure

Datum establishment

Probe datum features per drawing GD&T

Feature measurement

Probe each feature with appropriate strategy

Statistical analysis

Compute dimensions, evaluate vs tolerance

Report generation

Customer format report with measurements vs tolerance

Documentation archive

Records retained per industry retention requirement

Customer review

Customer review and signoff for FAI; ongoing for production

FAQ

CMM Inspection questions.

Zeiss precision CMM with PH10 motorized probe. Measurement volume 700×900×500 mm typical, larger machines available for special cases. Probe stylus 1-5 mm tip diameter, multiple stylus configurations for accessing different features. Touch trigger probe + scanning probe (continuous contact) for surface profile work.

Standard production CMM: MPE_E volumetric performance ±0.002 mm typical. Repeatability on simple feature ±0.0015 mm. For sub-micron precision (rare requirement): partner labs with environmental controls. CMM calibration: annual, traceable to NIST through accredited calibration provider. Calibration certificate available on request.

CMM software (Calypso, PC-DMIS) directly evaluates GD&T per ASME Y14.5. Datum reference frame established by probing datum features. Position tolerance, profile tolerance, runout, concentricity all computed automatically. MMC modifier supported. Report format includes nominal, tolerance, actual, deviation for each feature.

Complex parts require detailed CMM program: feature identification, datum probing strategy, measurement sequence optimization, collision avoidance. First-time program 2-5 hours for complex aerospace parts. Once programmed, subsequent measurements fast. We retain programs for repeat production work.

Yes — we offer CMM inspection services on parts manufactured elsewhere. Customer ships parts to us, we inspect to drawing, return parts with inspection report. Useful for: third-party verification, audit support, dimensional check before assembly. Quote per inspection complexity.

First-article inspection (1 piece, complex): $200-1000 depending on feature count and complexity. Production inspection (recurring, simple): $5-50 per part once programmed. Sample inspection (every 10th part during production): $10-30 per inspected part. Programming overhead amortized over production run.