Air Calliper Gauge to Check OD
Snap Gauge with Air Jet Fixed in Carbide Tip for External Diameters
Linear Resolution: 0.1 µm (0.0001 mm)
Repeatability (Gage R&R): ≤ 0.5 µm (< 10%)
Operating Line: 3–4 bar Regulated Pneumatic
Master Calibration: ISO 17025 / DIN 2250
Product Overview
AKIRA Air Calliper Gauges provide rapid, high-accuracy external diameter (OD) measurement. Built as a snap gauge configuration with precision air measuring jets embedded directly within tungsten carbide tips for ultimate durability and minimal friction wear.
Technical Definition & Operating Principle
An air calliper gauge is a specialized pneumatic snap comparator designed for rapid, non-destructive external diameter (OD) measurement of precision shafts, pins, and cylindrical journals from 10 mm to 180 mm. By embedding precision air measuring nozzles directly within wear-resistant tungsten carbide contact tips, the air caliper delivers both rugged physical datum positioning and frictionless pneumatic gauging. The air cushion formed between the carbide tips and the component surface prevents friction scratches on ground and polished surfaces. Working in conjunction with AKIRA air column readouts or digital display units, the gauge delivers immediate visual tolerance feedback with sub-micron sensitivity. Setup and periodic verification require two calibrated setting masters, ensuring linear measurement consistency across high-speed automotive turning and cylindrical grinding operations.
Technical Review & Specification Sign-off
Technical specifications reviewed and verified by Kalidoss, Lead Metrology Applications Engineer at AKIRA Precision Automation. Calibration methodologies certified traceable to ISO/IEC 17025:2017 and DIN 2250-C setting standards.
Key Features
- Offered with Snap Gauge with jet fixed in Carbide tip
- Range: 10 mm to 180 mm Middle
- Two setting masters required for quick zero-setting
- Protects precision ground surfaces from contact scratching
- Immediate reading on AKIRA Air Column or Digital Display Units
- Customer must specify the unit for which Air snap gauge is required
Technical Specifications
| Specification | Parameter |
|---|---|
| Diameter Range | 10 mm to 180 mm Middle |
| Measuring Contact | Snap Gauge with air jet fixed in Carbide tip |
| Master Requirements | Two setting masters required |
| Unit Specification | Custom built to specified display / column unit requirement |
| Measurement Principle | Non-contact pneumatic differential pressure |
| Wear Points | Carbide tipped contact surfaces |
Frequently Asked Technical Questions
- Why are air jets embedded directly into carbide tips on the air calliper gauge?
- Embedding precision nozzles within tungsten carbide tips provides durable mechanical reference stops for part seating while ensuring the pneumatic measurement takes place across a controlled air gap, preventing wear on the measuring orifice.
- Can the air calliper gauge inspect parts wet with cutting coolant on a lathe?
- Yes. The high-velocity 3–4 bar air stream actively blows away coolant droplets and fine swarf from the workpiece contact area, enabling accurate in-process OD measurement directly at the turning machine.
- What display units are compatible with AKIRA air calliper gauges?
- AKIRA air calliper gauges interface directly with AKIRA single-channel and multi-channel Air-Electronic Tri-Colour Display Units, providing instantaneous Green/Yellow/Red visual tolerance decisions and RS-232 telemetry.
- How often should air calliper setting masters be recalibrated?
- Setting master discs should be calibrated annually under ISO/IEC 17025 accredited laboratory conditions. For production operations, daily verification against masters once per 8-hour shift is recommended to compensate for temperature swings.
Industrial Applications
- Crankshaft, camshaft, and transmission shaft OD inspection
- Precision cylindrical pins, plungers, and turned parts
- In-process and final inspection on shop floor machining lines