Hobbing
CNC gear hobbing for high-volume production of external and internal gears, module M0.5~M20.
Engineering Center
Geyontech gear manufacturing capabilities. CNC hobbing, gear grinding Kapp NILES, gear inspection Klingelnberg, module M0.5-M20, DIN 3-7 precision.
Gear Cutting
Shaping
Gear shaping for internal gears, shoulders, and cluster gears where hobbing is not applicable.
Milling
Gear milling for large-module gears, racks, and custom profiles in prototype and small-batch runs.
Gear Grinding
Profile Grinding
High-precision finishing of gear tooth profiles for quiet running and load capacity.
Generating Grinding
Continuous generating grinding (e.g. Kapp NILES) for batch production at DIN 3~5 precision.
Heat Treatment
Carburizing
Case hardening for high surface hardness with tough core, ideal for transmission gears.
Nitriding
Low-distortion surface hardening with excellent wear and fatigue resistance.
Induction Hardening
Selective localized hardening of tooth flanks or specific surfaces.
Quenching & Tempering
Through hardening for consistent mechanical properties across the part.
Precision Machining
CNC Turning
Precision turning of shafts, gears, and housings to tight tolerances.
CNC Milling
Milling of keyways, splines, bores, and complex 3D features.
Grinding
Cylindrical and surface grinding for final dimensional and surface finish control.
Inspection
Gear Measuring Center
Full gear geometry analysis (profile, lead, pitch, runout) e.g. Klingelnberg.
CMM
Coordinate measurement of complex dimensions and GD&T features.
Roundness
Roundness and cylindricity verification of bores and journals.
Hardness
Surface and core hardness testing per heat treatment specification.
Surface Roughness
Surface finish measurement on tooth flanks and bearing surfaces.
Gear Mesh Inspection
Double-flank and single-flank mesh testing for assembly-level quality.
Quality Documentation
Material Certificate
Mill test certificates confirming material grade and chemical composition.
Heat Treatment Report
Process records, hardness readings, and case depth results.
Dimensional Inspection Report
Full dimensional results with CMM data and tolerance evaluation.
Gear Accuracy Report
Gear measuring center reports per DIN/ISO/AGMA grade.
Precision Grade Comparison#
| Grade Level | DIN | ISO | AGMA | GB (Chinese) |
|---|---|---|---|---|
| Ultra Precision | DIN 3 | ISO 3 | AGMA 14 | GB 3 |
| Precision | DIN 5 | ISO 5 | AGMA 12 | GB 5 |
| High Precision | DIN 7 | ISO 7 | AGMA 10 | GB 7 |
Lower numbers indicate higher precision. Batch production maintains Grade 4~5, grinding up to DIN 3.
Heat Treatment#
| Method | Materials | Hardness | Distortion Control |
|---|---|---|---|
| Carburizing & Quenching | 20CrMnTi, 20CrMo, 20CrNiMo | HRC 58~63 | 0.02~0.05mm |
| Nitriding | 38CrMoAl, 40Cr | HV 850~1100 | ≤0.01mm |
| Induction Hardening | 40Cr, 42CrMo, 45# | HRC 50~55 | 0.01~0.03mm |
Surface Treatment#
| Treatment | Features | Application |
|---|---|---|
| Phosphating | Rust prevention, friction reduction, paint base | Gears, shafts |
| Blackening | Rust protection, black appearance | Standard fasteners |
| Dacromet | High corrosion resistance, no hydrogen embrittlement | Export parts, high-demand components |
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