| Feature | Spur Gear | Helical Gear | | :--- | :--- | :--- | | | Straight and parallel to the axis | Angled in a helix around the cylinder | | Noise & Vibration | High (sudden, full-face impact) | Low (gradual, progressive engagement) | | Load Capacity | Good (low contact ratio 1.2-1.6) | Excellent (~50% higher than spur gears) | | Efficiency | Very High (98-99.5%) | Slightly Lower due to sliding friction | | Axial Thrust | None (only radial forces) | Yes (requires thrust bearings) | | Manufacturing Cost | Lower (simpler process) | Higher (30-40% more) |
The generator must synchronize the rotation of the hob with the rotation of the workpiece, while simultaneously providing a vertical feed (feed motion) for the cutting tool.
A digital model is only as good as its real-world application. When exporting your generated gear for production, keep these manufacturing methods in mind: helical gear generator
Yes, many advanced generators (such as geargen and Helical Gear Creator ) can generate herringbone or double-helical gears, which have opposing angled teeth to cancel out axial thrust.
If you found this article helpful, I can provide more information on how to calculate the for your specific gear design, or discuss the differences between single and double helical gears . Helical Gears - an overview | ScienceDirect Topics | Feature | Spur Gear | Helical Gear
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Even with a powerful helical gear generator, engineers make mistakes. Avoid these: If you found this article helpful, I can
A hobbing machine is the gold standard for production. The generator here is the software. It synchronizes the spindle (hob) speed with the workpiece rotation. The generator must calculate the differential between the hob’s lead and the gear’s lead.
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Spur Gear Teeth: ||||||||||| (Parallel to axis) Helical Gear Teeth: /////////// (Angled to axis) The Concept of Progressive Engagement
