Planetary gears are the core transmission unit of the planetary gear reducer. It combines high precision with high load-bearing capacity. Its key components undergo precision grinding, ensuring smooth gear meshing and a transmission efficiency exceeding 97%. The compact design achieves high reduction ratios while significantly saving installation space. High-quality alloy steel, combined with carburizing and quenching processes, ensures the gears possess excellent wear and impact resistance. Low backlash and low noise characteristics make these small planetary gears for planetary reducers perform exceptionally well in precision transmission applications such as servo control and automation equipment. Rigorous assembly processes and factory testing guarantee stable, reliable power transmission for every unit.
Small Planetary Gears For Planetary Reducers
What Quality Report Do We Provide For Planetary Gears?
As core components of precision transmission systems, the quality of planetary gears directly impacts the operational efficiency, stability, and service life of mechanical equipment. In critical sectors such as industrial automation, robotics, wind power generation, aerospace, and new energy vehicles, a comprehensive and authoritative quality report serves not only as a “passport” for product release but also as a vital guarantee for the equipment’s full lifecycle management.
Below is the core content of the planetary gear quality report we provide to our customers:
- Bubble Drawings
These drawings mark all dimensions requiring inspection. They serve as both operational guidelines for quality inspectors and the master reference index for all subsequent dimensional reports.
- Dimensional Report
This report lists the actual measured values corresponding to each numbered item on the bubble drawing. It includes nominal (drawing) values, actual measured values, upper and lower tolerances, and pass/fail determinations.
- Material Certificates
We provide traceable material certificates from third-party laboratories or the original manufacturer, detailing chemical composition and mechanical properties.
- Heat Treatment Report
For worms, the report includes data on effective case depth, surface hardness (HRC), and core hardness.
- UT/MT for big parts
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- UT utilizes ultrasonic wave reflection to detect voids and cracks deep within the material, ensuring the structural integrity of the gear body.
- MT focuses on surface areas such as the tooth flanks and roots, specifically targeting minute fatigue cracks caused by heat treatment or gear meshing.
By combining UT—which safeguards internal strength—with MT—which guards against surface cracking—the risk of gear failure under high-speed, heavy-load conditions is minimized.
- Accuracy Report
A detailed accuracy grade assessment is issued in accordance with international standards (such as DIN 3974, AGMA 2015, or ISO 1328). This report covers:
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- Worm: Single pitch deviation (fpt), total cumulative pitch deviation (Fp), total profile deviation (Fα), and helix deviation (fHβ).
- Worm Wheel: Total tangential composite deviation (Fi’) and radial runout (Fr).
A definitive conclusion regarding the accuracy grade is provided at the end of the report.
The quality report template you can check Downloads or contact us.
6-Step Production Process
Forging
Turning
Gear Cutting
Heat Treatment
ID & OD & Surface Grinding
Tooth Grinding
Strict Quality Inspection
Dimension Inspection
Material Inspection
Heat Treatment Testing
UT & MT Testing
Meshing Testing
Accuracy Testing
Dimension Inspection
Material Inspection
Heat Treatment Testing
UT & MT Testing
Meshing Testing
Accuracy Testing
Professional Packaging Safe Arrival
Inner Package
Out Package
Carton
Wooden Package
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