Exceptional Spatial Adaptability with Single Helical Gear for Parallel and Skewed-Axis Transmissions

Helical Gear Description

From a structural design innovation perspective, the helix gear is a type of gear optimised through parameters

such as helix angle, tooth width, and tooth profile curve to achieve spatial transmission adaptation

and performance enhancement. It flexibly accommodates diverse transmission layout requirements.

Key Features

Its defining feature is the adjustable helix angle (typically 8°–25°) tailored to transmission direction

and spatial constraints, configurable as left- or right-handed. Dual helical gears (herringbone gears) counteract axial forces.

Key benefits include exceptional spatial adaptability for parallel and skewed-axis transmissions,

with dual helical designs offering high load capacity and axial force elimination, alongside superior structural design flexibility.

Working Principle

The helix angle direction and magnitude are determined by the transmission system's spatial configuration.

For parallel shaft drives, helical gears with opposite rotation directions are paired; for skewed shaft drives,

meshing is achieved through helix angle matching. The axial forces from the left and right helical segments

of the double helical gear mutually cancel, eliminating the additional bearing load caused by axial forces

in single helical gears. Optimised tooth profile curves (such as involute modification) further enhance meshing smoothness.

Applications

Suitable for equipment with complex spatial layouts or stringent axial force control requirements, including:
- Double helical gears in machine tool feed drives
- Helical gears in helicopter main reduction gearboxes
- Crossed-shaft helical gears in construction machinery transmissions
- Herringbone gear transmission systems in rolling mills

Technical Specifications

YIZHI MACHINERY which is equipped with a full range of machining capabilities to satisfy customer needs.

Our team has extensive experience in precision gearing systems for numerous industries. We have supplied gears for mining equipment, power tools, hydraulic pumps and the rail transit industry.

The feature products are double helical gear and precision spiral bevel gear, equipped with Hofler Rapid and helix grinding machines, Niles ZE and ZP grinding machines and Gleason Phoenix bevel gear grinding machines. This capability allows us to provide quality customs made gears to domestic and overseas markets.