Helical Gear
High-Precision Helical Gears
Engineered for smooth, quiet, and reliable performance in high-speed and high-load applications. We manufacture custom helical gears to your exact specifications.
- Smooth & Quiet Operation
- Higher Load Carrying Capacity
- Reduced Vibration at High Speeds
- Manufactured from Certified Alloy Steels
Manufacturing Capabilities
We employ advanced CNC hobbing and grinding processes to manufacture helical gears that meet the most demanding specifications for performance and reliability.
| Gear Type | Single Helical |
| Module | 0.5 to 16 Module |
| Diametral Pitch (DP) | 48 DP to 1.5 DP |
| Helix Angle | Up to 45° (Right Hand or Left Hand) |
| Maximum Diameter | Up to 1500mm (59 inches) |
| Materials | Alloy Steel (EN24, EN353, 20MnCr5), Carbon Steel, SS |
| Heat Treatment | Case Carburizing & Hardening, Nitriding, Induction Hardening |
| Gear Quality Standard | Precision ground up to DIN 6 / AGMA 12 standards |
Comparison: Helical Gear vs. Spur Gear
Choosing the right gear type is critical for your application's success. Here is a direct comparison between helical and spur gears.
| Feature | Helical Gear | Spur Gear |
|---|---|---|
| Tooth Orientation | Angled to the gear axis | Parallel to the gear axis |
| Noise & Vibration | Low (Smooth, gradual engagement) | Higher (Full tooth contact at once) |
| Speed Capability | High | Moderate |
| Load Capacity | Higher (Multiple teeth in contact) | Standard |
| Axial Thrust | Yes (Requires thrust bearings) | No |
| Best For | High-speed, high-load, quiet applications | Cost-effective, moderate-speed applications |
Common Industrial Applications
Due to their superior performance, our helical gears are the preferred choice for a wide range of critical and demanding industries:
- Automotive Transmissions (Manual & Automatic)
- High-Speed Industrial Gearboxes
- Machine Tool Main Spindle Drives (Lathes, Mills)
- Printing & Textile Machinery
- Turbine and Compressor Drives
- Pumping Equipment (High-Pressure)
- Marine Propulsion Systems
- Elevator and Hoist Gear Units
Frequently Asked Questions
The main advantage is smoother and quieter operation. The angled teeth engage gradually, reducing vibration and impact, which makes them ideal for high-speed applications like automotive transmissions.
Axial thrust is a force generated along the gear's axis due to the angled teeth. This force must be managed by appropriate thrust bearings. For applications where this force must be eliminated, we recommend our Double Helical (Herringbone) Gears.
The helix angle is the angle between the gear tooth and the axis of the gear. A larger helix angle results in smoother operation and higher load capacity, but also generates more axial thrust. We can manufacture gears with any required helix angle.
This refers to the direction of the angle on the gear's teeth. When viewing the gear face, a right-hand helix slopes up to the right, and a left-hand helix slopes up to the left. For helical gears on parallel shafts to mesh, they must have the opposite hand (one RH and one LH).
The Shreeji Gears Helical Advantage
We master the nuances of helical gear manufacturing to deliver superior performance.
Engineered for Silence & Speed
The primary benefit of a helical gear is its quiet operation. We achieve this through ultra-precise CNC profile grinding, ensuring a perfect helix angle and tooth form for smooth, gradual engagement and minimal vibration, even at very high RPMs.
Axial Thrust Expertise
We understand that helical gears generate axial thrust. Our engineers can advise on the required bearing configurations or, for high-torque applications where thrust must be eliminated, recommend our specialized Double Helical Gears.
Custom Helix & Material Science
Your application is unique. We manufacture helical gears with any required helix angle (RH or LH) from certified materials like EN353 or 20MnCr5, applying specific case hardening treatments to create gears that can withstand immense operational stresses.
A Deeper Dive into Helical Gear Fundamentals
Understanding the design principles of helical gears is crucial for high-performance applications.
What Defines a Helical Gear?
A helical gear is a cylindrical gear where the teeth are cut at an angle to the axis of rotation. This angle is known as the helix angle. Unlike spur gears which engage along their entire face at once, the angled teeth of helical gears engage gradually. This rolling contact starts at one end of the tooth and progresses along its length, resulting in smoother, quieter operation and a higher load-bearing capacity.
The Critical Role of the Helix Angle
The helix angle is the single most important parameter in a helical gear's design. A larger helix angle leads to smoother and quieter operation with more teeth in contact at any given time. However, it also generates a higher axial thrust force. We manufacture gears with both Right-Hand (RH) and Left-Hand (LH) helices. For parallel shaft applications, mating gears must have the same helix angle but opposite hands (one RH, one LH).
Understanding and Managing Axial Thrust
The primary design consideration for helical gears is axial thrust—a force generated parallel to the gear's axis. This force is a direct result of the angled teeth pushing against each other. It must be properly managed by using thrust bearings or other mechanical features within the gearbox to prevent axial movement and component wear. For the most demanding applications where this thrust must be internally cancelled, we invite you to explore our specialized Double Helical (Herringbone) Gears.
"Our new gearbox design required extremely quiet operation. The precision-ground helical gears from Shreeji Gears exceeded our expectations, significantly reducing noise levels. Their quality is unmatched."— R&D Head, Industrial Drive Manufacturer
Get a Fast, Accurate Quote for Helical Gears
Provide us with your technical specifications for a competitive, no-obligation quote.
For the fastest service, please email your technical drawing to support@shreejigears.com. Include these key parameters in your inquiry:
- Module or Diametral Pitch (DP)
- Number of Teeth & Face Width
- Helix Angle & Hand (e.g., 19° RH)
- Material & Required Hardness
- Bore Size & Keyway Details
- Required Quantity