When you demand quiet, high-efficiency power transmission, our helical gears bring smooth performance, strong torque capacity, and longevity. From autonomous vehicles, robotics joints, to wind turbine gearboxes, YF Gear's advanced helical gear solutions tackle noise, durability, and axial load challenges:
Custom Design & Engineering Support: From CAD drawings to technical consultation, we help you select the ideal gear geometry, helix angle, and material.
Wide Range of Materials: Including carburized alloy steel (20CrNiMo), high-strength nylon composites, titanium alloy, and stainless steel for high-strength, low-noise, and lightweight applications.
Precision Manufacturing: Advanced 5-axis CNC grinding and ISO Class 5 precision processes ensure gears meet the highest quality standards.
Flexible Production: Small-batch prototyping or large-scale manufacturing to suit your project scale.
Performance Verification: Each gear is validated with metrics such as noise reduction, torque capacity, backlash control, and durability under high-speed, heavy-duty conditions.
Global Supply & Support: ISO-certified quality and worldwide delivery, backed by experienced technical support.
Helical gears are cylindrical gears with teeth angled to the axis of rotation, forming a helix. Unlike straight-tooth spur gears, the gradual tooth engagement of helical gears provides smoother motion, reduced noise, and higher torque capacity, making them ideal for high-speed, heavy-duty transmission systems.
Ultra-Quiet Operation: Gradual tooth engagement reduces vibration and noise ≤50–55 dB.
Exceptional Torque Capacity: High contact ratio ensures reliable power transmission under heavy loads.
High-Speed & Heavy-Duty Performance: Engineered for extreme operating conditions with minimal wear.
Durability & Longevity: Enhanced load distribution extends gear life and reduces downtime.
High Efficiency: Optimized designs achieve ≥99.5% transmission efficiency with precise axial thrust control.
Helical gears feature angled teeth, cut diagonally along the face of the gear.
Unlike straight-cut gears, their teeth engage gradually, resulting in quieter and smoother operation, even at high speeds.
This geometry also increases tooth contact area, allowing greater load distribution and higher torque transmission efficiency.
However, it introduces axial thrust, which can be controlled using thrust bearings or pairing with opposite-angled gears.
| Parameter | Range / Specification | Description |
|---|---|---|
| Module (M) | 0.5 – 12 M | From fine precision gears to large industrial gears |
| Helix Angle | 15°–30° (customizable) | Optimized for noise control & efficiency |
| Outer Diameter | Up to 800 mm | Suitable for medium to large drives |
| Gear Width | Up to 300 mm | Handles higher torque transmission |
| Accuracy Class | DIN 6–8 / AGMA 10–12 | High-precision tooth grinding |
| Materials | 20CrMnTi, 42CrMo, 40Cr, 316L, POM, Nylon | Strength, corrosion resistance, or low noise |
| Heat Treatment | Carburizing, Nitriding, Quenching, Tempering | Hardness up to HRC 58–62 |
| Surface Finish | Grinding, Polishing, Black Oxide, Zinc Plating | Durability & visual appeal |
| Testing | CMM, Gear Tester, Noise & Hardness Inspection | 100% inspection before shipping |
| Certifications | ISO 9001, RoHS, UL | Meets global industrial standards |
To meet diverse industrial challenges, YF Gear provides innovative material solutions:
Carburized 20CrNiMo Alloy Helical Gears
Optimized 30° helix angle design
40% increased contact ratio
Heavy-duty, high-strength performance
High-Strength Nylon Composite Helical Gears
Self-lubricating, impact-resistant
Noise ≤50 dB
Lightweight, ideal for automation and robotics
Titanium Alloy Lightweight Helical Gears
3x higher specific strength than steel
Corrosion-resistant and ultra-light for aerospace and premium machinery
Customization options include: helix angles, module, tooth count, bore diameter, keyways, and both small-batch prototypes and mass production.
5-Axis CNC Grinding: ISO Class 5 precision ensures consistent quality.
Modified Helix Angle Correction Technology: Controls axial thrust and improves efficiency.
Validated Performance:
12 dB noise reduction in NEV reducers
GL-certified 20,000-hour maintenance-free operation in wind turbine gearboxes
Robotic joint transmission backlash <1 arc-minute
| Feature | Helical Gear | Spur Gear | Best Use Case |
|---|---|---|---|
| Tooth Orientation | Angled (Helix) | Straight | Helical for smoother engagement |
| Operation Noise | Low noise, smooth | Louder at high speeds | Noise-sensitive systems |
| Load Capacity | High | Moderate | Heavy-duty applications |
| Axial Thrust | Exists | None | Helical needs thrust bearing |
| Efficiency | Slightly lower (friction) | Higher | Efficiency-focused drives |
| Manufacturing Cost | Higher | Lower | Helical for performance; spur for budget |
| Maintenance | Medium | Simple | Similar lifespan |
| Speed Capability | Excellent for high-speed | Limited by noise | Helical ideal for high RPM systems |
Choose Helical Gear when you need smooth power transmission, quiet performance, and durability under load.
Choose Spur Gear when simplicity and efficiency are the top priorities.
| Feature | Helical Gear | Bevel Gear | Best Use Case |
|---|---|---|---|
| Transmission Axis | Parallel | Intersecting (usually 90°) | Helical for same-axis drives |
| Tooth Design | Angled parallel to shaft | Conical tooth surface | Bevel for changing direction |
| Noise & Smoothness | Very quiet, continuous contact | Moderate, intermittent contact | Helical quieter at high speed |
| Load Capacity | High due to multiple teeth contact | High, but localized | Helical for torque balance |
| Efficiency | High | Moderate | Both efficient; helical better for long runs |
| Applications | Transmissions, conveyors, robotics | Differential, right-angle gearboxes | Select based on shaft arrangement |
Tip:
If your system transmits power between parallel shafts, helical gears are optimal.
For systems that change direction between shafts, bevel gears are the better option.
Helical gears are designed for power transmission systems that demand durability, accuracy, and quiet operation.
Automotive Systems: Transmission, differential, steering gearboxes
⚙️ Industrial Machinery: Conveyors, reduction drives, heavy-duty machines
Robotics: Motion control, servomechanisms, automation joints
️ Wind Turbines: Long-life, high-torque main gearboxes
Aerospace & Defense: Precise, vibration-free control systems
Medical & Instrumentation: Silent, micro-motion drive units
A: Helical gears have angled teeth for gradual engagement, offering quieter operation, higher torque, and smoother motion, while spur gears have straight teeth optimized for simplicity and moderate-speed efficiency.
A: Yes, we manufacture gears based on CAD drawings, technical sketches, or physical samples, fully customized for size, material, helix angle, and performance requirements.
A: Options include carburized 20CrNiMo alloy, high-strength nylon composites, titanium alloy, and stainless steel 316L for high-performance, corrosion-resistant, and lightweight applications.
A: Automotive transmissions, industrial robots, aerospace equipment, wind turbines, and heavy-duty machinery.
A: Because their angled teeth engage gradually, reducing impact and vibration during meshing.
Looking for quiet, durable, and efficient helical gears for your machinery or transmission system?
Contact YF Gear today — our engineering team will help you design and produce customized helical gears to meet your torque, noise, and precision requirements.
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