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Help CenterHelical Gear 40 Teeth Module 2 25° Helix Angle Induction Hardened Tooth Surface
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Henan San Kuang Machinery Technology Co., Ltd. presents a precision-engineered Helical Gear with 40 teeth, Module 2, and a 25° helix angle, featuring an induction hardened tooth surface for exceptional durability and load-bearing capacity. As a leading manufacturer with a 10,000-30,000 sqm factory and annual export value of US$2.5-5 million, we deliver helical gears that ensure smooth, quiet operation and high torque transmission for demanding industrial applications. This gear is ideal for speed reducers, conveyors, and heavy machinery where reliability is critical.
Our helical gears are machined from high-quality alloy steel blanks, then heat-treated and induction hardened to achieve a deep, wear-resistant surface while maintaining a tough core. The 25° helix angle optimizes contact ratio and reduces noise, making it suitable for continuous duty cycles. Each gear undergoes rigorous quality checks to ensure dimensional accuracy and consistent performance.
Key Features & Technical Specifications
Teeth Count: 40 – designed for moderate speed reduction and high torque output.
Module 2: Standard metric module ensures compatibility with common gear racks and pinions (custom modules available).
Helix Angle: 25° – provides a higher contact ratio than spur gears, leading to smoother meshing and reduced vibration.
Induction Hardened Tooth Surface: Hardness reaches HRC 50-55 (typical) for extended service life against pitting and wear.
Material: 20CrMnTi, 40Cr, or 42CrMo alloy steel (customizable based on application).
Heat Treatment: Carburizing + quenching + induction hardening – creates a case depth of 0.8-1.2mm.
Precision: Machined on CNC hobbing and shaping machines, achieving ISO 6-8 grade accuracy.
Surface Finish: Ground tooth flanks optional for high-speed or high-precision requirements.
| Parameter | Specification | Notes |
|---|---|---|
| Number of Teeth | 40 | Standard; other counts available on request |
| Module | 2 | Metric module; can be customized |
| Helix Angle | 25° | Right-handed or left-handed as per design |
| Tooth Surface Hardness | HRC 50–55 | Induction hardened |
| Case Depth | 0.8–1.2 mm | Measured after heat treatment |
| Material Grade | 20CrMnTi / 40Cr / 42CrMo | Other alloys upon request |
| Max Pitch Diameter | ~80 mm (calculated) | Exact dimensions vary; contact for CAD |
Advantages & Customer Benefits
Increased Load Capacity: Induction hardening provides a hard, wear-resistant surface that withstands high contact stresses, prolonging gear life by up to 50% compared to untreated gears.
Smooth & Quiet Operation: The 25° helix angle ensures multiple teeth are always in mesh, reducing noise and vibration – critical for enclosed gearboxes.
Energy Efficient: Lower friction and better tooth engagement reduce power loss, improving overall transmission efficiency.
Customization Flexibility: We can adjust tooth count, module, helix angle, bore size, keyway, and material to meet your exact shaft and housing requirements.
Reliable Quality Control: 100% dimensional inspection using CMM and hardness testing for every batch. Our factory employs 51–100 skilled workers and advanced CNC equipment.
Competitive Lead Times: With a factory area exceeding 10,000 sqm, we maintain lean inventory and efficient production scheduling. Typical lead time for standard helical gears is 15–25 days.
Trust Henan San Kuang for Your Transmission Needs
Since our establishment in 2022, we have served clients across North America, Europe, Southeast Asia, and beyond, with annual export values between US$2.5 million and US$5 million. Our 10,000–30,000 sqm manufacturing facility in Luoyang, Henan, is equipped with modern hobbing, shaping, and heat treatment lines. We ship via major ports including Shanghai, Lianyungang, Qingdao, and Tianjin, ensuring smooth logistics. Every helical gear we produce reflects our commitment to precision, durability, and cost-effectiveness. Choose San Kuang for gears that deliver consistent performance in the most demanding environments. Contact us today for a quote or technical consultation – we are ready to support your projects with customized solutions and fast delivery.
Frequently Asked Questions
Q: What is the typical lead time for this helical gear?
A: For standard 40T Module 2 gears with induction hardening, lead time is approximately 15–25 working days depending on order quantity. Rush orders can be arranged upon request.Q: Can you supply gears with different helix angles or tooth counts?
A: Yes, we offer customizable helix angles (10°–35°) and tooth counts (10–200). Just provide your design parameters or sample.Q: Is the induction hardened surface suitable for high-speed applications?
A: Yes. The hardened case depth of 0.8–1.2 mm provides excellent wear resistance at moderate to high speeds. For extremely high speeds (above 3000 RPM), we recommend ground tooth flanks as an option.Q: Do you provide heat treatment certificates or material test reports?
A: Yes, we can supply mill certificates for raw materials and hardness test reports upon request. Third-party inspection is also welcomed.Q: What bore sizes and keyways are available?
A: The gear can be machined with any bore diameter (typically 12–50 mm) and keyway according to DIN 6885 or customer standards. Please specify your requirements.Q: How do you ensure the gear's precision and noise level?
A: We use CNC hobbing and shaping machines with precision up to ISO 6. Each gear is tested on a gear measuring center. For noise-sensitive applications, we can apply grinding or lapping processes.Q: What is the minimum order quantity?
A: MOQ is generally 10 pieces for standard sizes. For custom designs, a tooling or setup fee may apply for small batches.Q: Do you ship internationally? Which ports do you use?
A: Yes, we export worldwide. Our shipment ports include Shanghai, Lianyungang, Qingdao, and Tianjin. We can arrange sea, air, or express delivery based on your needs.
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