Products Description
What Is a Double Helical Gear?
A double helical gear is a high-performance gear type designed with two mirrored helical gears joined together, forming a "V-shaped" tooth arrangement. This structure cancels axial thrust generated during rotation, delivering smoother power transmission compared with spur gears and conventional helical gears.
In heavy-duty gear manufacturing, double helical gears are preferred for high-load, high-speed applications where vibration control, noise reduction, and long service life are critical. They are commonly integrated into planetary gearbox systems and large transmission assemblies.
Load Balance
Eliminates axial force for stable transmission
High Precision
Optimized gear module and tooth profile accuracy
Long Service Life
Reduced wear under continuous operation
Custom Design
Tailored for different types of gears and systems
Technical Specifications
| Gear Type | Double Helical Gear |
| Material | BS3100 BT1 Cast Steel or Customized |
| Gear Module | Customized per application |
| Tooth Profile | Optimized helical gear tooth profile |
| Heat Treatment | Normalizing, Quenching & Tempering |
| Hardness Range | Application-specific controlled hardness |
| Runout Tolerance | Controlled for smooth high-speed rotation |
| Surface Finish | Reduced friction, extended service life |
| Gear Cutting Grade | Precision gear cutting and inspection |
| Customization | Fully customized gear fabrication available |
Quality Control & Inspection System
Full QCP with Traceable Data and Visual Records
Each double helical gear is manufactured under a strict Quality Control Plan (QCP). From raw material inspection to final delivery, every stage is documented with inspection reports, charts, and photos to ensure consistent quality and reliability.
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Chemical Composition Inspection
Ensures BS3100 BT1 steel meets strength and fatigue requirements.
Mechanical Property Testing
Verifies tensile strength, yield strength, and elongation under load.
Normalizing Control
Refines grain structure for improved toughness.
Quenching & Tempering Records
Guarantees hardness-depth balance for durability.
Ultrasonic Testing (UT)
Detects internal casting defects.
Hardness Verification
Efficient and precise processing and testing equipment.
Gear Geometry Inspection
Measures gear module, pitch, and tooth ring accuracy.
Geometric Runout Measurement
Controls radial and axial runout.
Magnetic Particle Testing (MT)
Identifies surface cracks after machining.
Surface Roughness Inspection
Reduces wear, noise, and transmission losses.
Packaging & Protection
Customized Heavy-Duty Gear Packaging Solutions
For double helical gears and other large gear products, packaging methods are selected based on shipment mode, gear size, and destination requirements. Small and medium gears are typically stacked and secured with protective separators, while large or export gears are packed in fumigation-free wooden crates combined with reinforced steel frames for maximum protection.
All gears receive anti-rust treatment, moisture-resistant wrapping, and shock-absorbing protection to prevent corrosion and tooth damage during long-distance transportation. Clear lifting marks and packing lists are applied to ensure safe handling and efficient unloading.
Shipping & Global Delivery
Professional Logistics & Export Documentation Support
We provide end-to-end global delivery services for double helical gears, covering container shipping, break bulk cargo, and project logistics. Our logistics team prepares all required export documents, including commercial invoice, packing list, bill of lading, material certificates, inspection reports, and heat treatment records, ensuring smooth customs clearance.
Real-time shipment tracking, pre-shipment coordination, and post-delivery follow-up ensure every order is delivered safely, on time, and exactly as specified.
Other products
Inquiry & Custom Double Helical Gear Solutions
Double Helical Gear Solutions
Contact us now to receive a customized double helical gear solution tailored to your load, speed, and application requirements. Our engineering team is ready to support your project with proven gear manufacturing expertise.
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