Precision Metrology & Zero-Defect Quality
Every gear produced at National Gears undergoes rigorous sub-micron geometric measurement and metallurgical testing. Powered by Zeiss 3D CMMs and Klingelnberg P-Series gear metrology systems, we guarantee compliance with DIN Class 1 to 3 precision specs.
Metrology Live Inspection
Zeiss CMM Calibration Log
100% Dimensional Inspection Certificates Included With Every Dispatch
State-of-the-Art Quality & Testing Infrastructure
Our laboratory is equipped with globally recognized testing instruments, ensuring sub-micron precision from raw forging to final tooth grinding.
Zeiss 3D CMM Metrology
High-precision coordinate measuring machine with scanning probes for volumetric dimensional validation and CAD model deviation mapping.
- Sub-micron resolution
- GD&T profile analysis
Klingelnberg P-Series
CNC gear testing center for involute tooth trace, pitch error (Fp), lead slope (fHβ), and runout (Fr) automated measurement.
- DIN 3962 Class 1-3 capability
- Pitch & flank line charts
Spectro Alloy Analysis
Optical emission spectrometer evaluating chemical composition of steel alloys (20MnCr5, 8620, EN353, 4140) before machining.
- 100% Raw material verification
- Traceability certificates
Metallurgy & Hardness
Rockwell & Micro-Vickers hardness testers for case depth measurement, core toughness checks, and micro-structure verification.
- HRC 58-62 Case profile
- Micro-hardness traverse
Ultra-Precision Craftsmanship & Sub-Micron Accuracy
Whether manufacturing heavy industrial transmission gears or micro-gear components requiring watchmakers' level of precision, National Gears maintains flawless tooth profiles, zero backlash, and mirror-finished tooth flanks.
DIN 3962 & AGMA Quality Standards
| Quality Grade | Gear Profile Error | Surface Finish (Ra) | Typical Applications | Inspection Method |
|---|---|---|---|---|
| DIN Class 1 - 3 | < 1.5 µm | 0.1 - 0.2 µm | Aerospace transmissions, high-speed turbomachinery, precision robotics | Zeiss CMM Scanning & Klingelnberg P-Series |
| DIN Class 4 - 6 | 1.5 - 3.5 µm | 0.2 - 0.4 µm | Hydraulic pump gears, commercial gearboxes, CNC spindle drives | CNC Profile Grinder Metrology & Optical Tester |
| DIN Class 7 - 9 | 4.0 - 8.0 µm | 0.8 - 1.6 µm | Agricultural equipment, heavy construction machinery, power take-offs | Vernier, Micrometer & Pitch Dial Indicators |
5-Stage Zero-Defect Quality Control Protocol
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