Precision Industrial Gear Classification & Specifications
Explore National Gears' complete spectrum of custom spur gears, helical shafts, internal splines, and heavy bull gear assemblies engineered for sub-micron accuracy and zero-defect power transmission.
Helical Gears Gear Portfolio
Low Noise Mesh
Helical Shaft & Gears
Angled teeth gear profile offering continuous tooth contact, ultra-quiet operation, and high load-bearing capacity.
Zero Axial Thrust
Double Helical Gears
V-shaped opposing teeth profile cancelling axial thrust forces for heavy turbine and mill speed reducers.
90° Axis Transfer
Helical Gear Sets
Conical gear pairs engineered for 90-degree right-angle motion transfer in differential axles and heavy gearboxes.
Speed Reducers
Helical Reducer Units
Single and multi-stage helical reduction pairs for industrial conveyors, hoists, and OEM power drives.
Differential Pinion
Helical Pinion Shafts
Case-hardened forged steel helical pinions precision ground for smooth high-ratio speed reduction.
Heavy Duty
Heavy Helical Gears
Large diameter forged steel helical gear wheels engineered for heavy OEM machinery and rolling mills.
Gear Type Selection & Specifications Matrix
Comparative technical analysis to guide your design and purchasing requirements.
| Gear Category | Axis Alignment | Efficiency | Noise Level | Load Capacity | Primary Application |
|---|---|---|---|---|---|
| Spur Gears | Parallel Shafts | 98% - 99% | Moderate | High Radial | Industrial Gearboxes & Pumps |
| Helical Gears | Parallel / Crossed | 96% - 98% | Very Low | Very High Axial/Radial | High Speed Automotive & Turbines |
| Helical Gears | 90° Intersecting | 95% - 97% | Low - Moderate | High Angular Torque | Differential Drives & Right Angle Reducers |
| Internal Gears | Concentric Parallel | 97% - 99% | Very Low | Extreme Compact Torque | Planetary Gearboxes & Robotics |
| Spline Sleeves | Co-Axial Shafts | 99% | Zero Backlash Fit | Maximum Shear Strength | Hydraulic Pump Couplings & Drives |
Material & Heat Treatment Excellence
Raw material batch certification with controlled thermal treatment for zero failure duty.
Case-Hardened Alloys
SAE 8620, 20MnCr5, and EN353 providing surface hardness up to HRC 58-62 with resilient shock-absorbing core.
Controlled Heat Treatment
In-house gas carburizing, liquid nitriding, and high-frequency induction hardening ensuring precise case depth.
CNC Gear Finishing
Automated CNC hobbing, gear shaping, and sub-micron shaving to achieve DIN Class 3–5 accuracy tolerances.
Surface Polish & Inspection
Ra 0.4 µm micro-finish tooth grinding inspected via lead/profile lead error gear testing equipment.
Need Custom Hydraulic Pump & Precision Gear Manufacturing?
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