A miter gear is a type of bevel gear with a 90-degree shaft angle and a 1:1 transmission ratio. Simply put, it’s a pair of gears that make a “right-angle turn,” transmitting rotation from one shaft to another perpendicular shaft at the same speed (1:1).
Its core characteristics and applications depend on the tooth form:
- Straight Miter Gears: The teeth are straight. Advantages: Simple manufacturing and lower cost. Disadvantages: Significant meshing impact, leading to noticeable noise and vibration at high speeds. Suitable for medium to low-speed applications where noise is not a primary concern.
- Spiral Miter Gears: The teeth are curved. Advantages: Smoother meshing, lower noise, higher load capacity, and longer service life. Disadvantages: More complex in design and manufacturing, and require extremely high installation precision.
Primary application scenarios include equipment that requires 90-degree power transmission in a compact space, such as automotive differentials, machine tool indexing heads, printing machinery, packaging equipment, robotic joints, marine steering gears, and precision instruments.