High ratio hypoid gear refers to a hypoid gear system that provides a significant reduction in speed or increase in torque. The term "high ratio" indicates that the gear system achieves a large reduction ratio between the input and output parameters.

• high reduction hypoid gears are specifically engineered to achieve a significant reduction in speed and a substantial increase in torque. They are capable of achieving higher reduction ratios, typically ranging from 10:1 to 100:1 or even higher.
• High reduction hypoid gears, with their ability to achieve substantial speed reduction and high torque output, are often utilized in applications that demand significant power transmission and torque amplification. They are commonly employed in heavy-duty industrial machinery, power transmission systems, and robotics.
• While both common hypoid gears and high reduction hypoid gears are designed to handle torque, high reduction hypoid gears are typically built to withstand higher torque loads due to their intended use in applications requiring high torque output.
• The design and tooth geometry of high reduction hypoid gears are optimized to achieve higher reduction ratios and handle increased torque. They may feature modifications like larger gear diameters, enhanced tooth profiles, and specialized heat treatment to accommodate the higher loads and torque requirements.

High reduction ratio hypoid, also known as helical worm drive, is an alternative to traditional worm gear drives.

Compared with worm gear transmission, high reduction ratio hypoid drive has many advantages:

Characteristics of hypoid gears:

• Changes in the angle of transmitted torque
• Able to withstand greater loads
• The transmission is more stable and the noise is low
• Adjustable offset

Transmission advantages of hypoid gears:

• The axis of the small wheel is offset, which increases the helix angle of the small wheel, resulting in a significant increase in the diameter of the small wheel, thus enhancing the strength and rigidity of the small wheel; and achieving a larger transmission ratio than spiral bevel gears under the same conditions.
• There is relative sliding along the tooth length direction and tooth height direction, so the tooth surface wears evenly. Heat treatment also facilitates grinding, improves contact areas, improves tooth surface finish and reduces noise.
• The axis offset allows greater freedom in the arrangement of the transmission in space.
• The axis is offset and can be crossed, and both wheels can be supported by stable straddles.
• The small wheel helix angle is increased, the strength is significantly improved, and it can adapt to a larger transmission ratio. Single-stage transmission can take more than 10.
• Good lubrication conditions and high transmission efficiency.

Disadvantages compared to other types of staggered shaft drives:

• The calculation and design are far more complicated than other gear pairs.
• Compared with general orthogonal spiral spur gears, the calculation of tooth adjustment is more complicated, and the matching of the contact area is also difficult.
• The lubrication conditions are high and special hypoid gear lubricants are required.