Heavy rail / Urban light rail

Dimensional controls

Better understand fracture, wear and deformation phenomena for both new and used parts.

Tests objectives

  • Take dimensional measurements (radius, diameter, depth, angle, etc.):
    – For complex and three-dimensional parts (precision: ± 3 microns)
    – For new or used parts – measurement of dimensions specified on the plan (railway safety components, equipment, etc.)
  • Measure shape and position defects: Straightness, flatness, circularity, cylindricity, circular shape, parallelism, perpendicularity, coaxiality, concentricity, etc.
  • Measure surface condition, thread dimension, threads or grooves

Tests facilities

  • 3D measuring machine (Tri-mesures)
  • Profile projector (Starett-Sigma)
  • Measuring column (Roch)
  • Numerous other measuring devices: Micrometers, gauges, roughness testers, etc.

Testing norms

EN ISO 286 – Geometrical product specifications (GPS) – ISO code system for tolerances on linear sizes.

EN 22768-1 & 2 – General tolerances – Part 1: Tolerances for linear and angular dimensions without individual tolerance indications – Part 2: Geometrical tolerances for features without individual tolerance indications

NF F00-037 – Railway equipment in general – Tolerances on metal parts – Permissible deviations on dimensions without tolerance indications – Allowance for machining

NF ISO 965 – ISO general purpose metric screw threads – Tolerances

NF ISO 4288 – Geometrical Product Specifications (GPS) – Surface texture: Profile method – Rules and procedures for the assessment of surface texture

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Our references

CIRCOR
GREMCO
RATP
SNCF