Flatness gauge

Product overview
Innovacera’s ultra-precision alumina (Al₂O₃) ceramic air-bearing straightedge provides a long-travel geometric reference for high-accuracy inspection and calibration. A precision air-bearing carriage floats on a thin air film supplied by compressed air, delivering non-contact linear scanning with minimal disturbance and negligible mechanical wear.

Key features

• Micron-level geometric accuracy: standard models achieve 1.5 μm straightness and flatness.
• Non-contact air-bearing carriage: eliminates mechanical friction, wear and stick-slip for stable scanning.
• High-purity alumina (Al₂O₃) reference beam: high hardness, corrosion resistance and dimensional stability.
• Long-length capability: standard lengths include 1,200 mm, 1,500 mm and 2,500 mm for large guideways and long-travel axes.
• Low maintenance and lubricant-free operation under normal compressed-air supply.
• Customizable: ceramic length, cross-section, mounting holes, locating surfaces, carriage design and sensor interfaces.

Technical specifications

• INV201212-SG — 200 × 120 × 1200 mm — Straightness: 1.5 μm — Flatness: 1.5 μm — Standard model.
• INV201215-SG — 200 × 120 × 1500 mm — Straightness: 1.5 μm — Flatness: 1.5 μm — Standard model.
• INV151525-SG — 150 × 150 × 2500 mm — Straightness: 1.5 μm — Flatness: 1.5 μm — Standard model.

Applications

• Straightness inspection and assembly calibration of CNC machine-tool guideways.
• Geometric accuracy verification of CMM axes and long-travel metrology equipment.
• Commissioning and verification of air-bearing motion platforms and linear motor stages.
• Semiconductor and flat-panel inspection systems.
• Precision optics, laser processing and scanning equipment alignment.
• Accuracy inspection for grinding machines, surface grinders and large machining centers.
• Metrology laboratories and research institutions performing geometric measurement.

FAQ (selected)

• What is an air-bearing ceramic straightedge and how does non-contact scanning improve inspection? A high-purity alumina (Al₂O₃) ceramic reference beam combined with a precision air-bearing carriage forms a micro-scale air film that removes mechanical contact. This suppresses friction, stick-slip and wear, reducing measurement noise and providing a stable geometric reference (≤1.5 μm) for straightness and flatness inspection.
• Can I order a custom straightedge and how is customization handled? Yes. Custom options include non-standard lengths, cross-section dimensions, travel, mounting-hole patterns, datum surfaces, air-bearing carriage geometry and sensor mounting interfaces compatible with laser interferometers, autocollimators and displacement sensors.

Additional technical details

• Material: High-purity alumina ceramic (Al₂O₃); alternative advanced ceramics available on request.
• Standard achievable straightness / flatness: 1.5 μm.
• Standard lengths: 1200 mm, 1500 mm, 2500 mm.
• Cross-section examples: 200 × 120 mm (for 1200 and 1500 mm); 150 × 150 mm (for 2500 mm).
• Operation principle: Precision air-bearing carriage creating a thin air film for non-contact scanning.
• Maintenance: Lubricant-free under normal air supply; reduced contamination and wear.
• Measurement compatibility: Designed for displacement sensors, autocollimators, electronic levels, laser interferometers and data acquisition systems.
• Customization: Ceramic length, cross-section, mounting holes, locating surfaces, travel, carriage structure and sensor interfaces can be adapted to equipment configuration and inspection requirements.