Surface/Lead Inspector
Precise and ultra-fast lead and surface measurement on shafts
The Surface/Lead Inspector is a measurement system for ultra-fast, precise determination of lead (Drall) and surface roughness on sealing counterfaces of rotating shafts.
The system is based on the Heliotis H8m white-light interferometric sensor (lenses WLI8x or WLI10x) with lateral resolutions of 1.5 µm and 1.2 µm respectively. The shaft is automatically traversed under the sensor; measurement is non-contact.
The Surface/Lead Inspector covers all methods of FVA Guideline 975 I in one device: IMA-Microlead®Analysis (approx. 2:30 min), combined structure-based lead analysis (3D-Macrolead per FVA 975 I, approx. 3:00 min) and Macrolead measurement per MBN 31007-7 at shaft diameter 50 mm (approx. 7:30 min) – up to 8× faster than comparable devices, enabling lead measurement at cycle time.
Up to 8× faster than comparable measurement devices. IMA-Microlead®Analysis in approx. 2:30 min, combined lead analysis per FVA 975 I in approx. 3:00 min.
Implements all lead measurement methods of FVA Guideline 975 I for shaft counterfaces of radial shaft seals.
IMA-MicroleadAnalysis, 3D-MacroleadAnalysis, combined structure-based lead analysis, plus 2D/3D surface roughness per DIN EN ISO 25178 and Macrolead per MBN 31007-7 in a single system.
Intuitive and easy-to-use measurement software. Customer-specific developments possible, e.g. automation for industrial applications close to manufacturing.
Official FVA guideline on shaft lead for radial shaft seals – the basis for the measurement methods implemented here.
Open guideline (PDF)| Sensor type | Heliotis H8m (white-light interferometry) |
| Lenses | WLI8x / WLI10x |
| Lateral resolution | 1.5 µm / 1.2 µm |
| Max. shaft diameter | 200 mm |
| Max. shaft length | 380 mm |
| Max. part weight | 20 kg |
| Structure-based lead measurement | IMA-MicroleadAnalysis, 3D-MacroleadAnalysis, combined |
| Macrolead measurement | per MBN 31007-7 |
| Surface roughness | 2D/3D per DIN EN ISO 25178 |
| Compliant guideline | FVA 975 I |
| Dimensions (W × D × H) | 600 × 700 × 900 mm |
| Weight | 70 kg |
Additional dimensions on request. 2D/3D evaluations use additional software (Mountains Map, Digital Surf).
Shaft lead and surface inspection for shaft manufacturers and seal assembly
Characterization of shaft surfaces for sealing applications
Different machining methods or shaft types
All technical details on the Surface / Lead Inspector as a PDF.
Precise, fast and reproducible measurements – directly from research.
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