Which gear type allows for higher load capacity compared to spur gears?

Helical gears are designed with their teeth cut at an angle to the gear axis, which allows for smoother engagement between gears compared to spur gears. This angled tooth design creates multiple points of contact between the gears as they mesh, leading to a larger contact area. As a result, helical gears can handle higher loads and deliver more torque than spur gears, which engage at only one point.

The smoother engagement of the teeth reduces the likelihood of shock loads during operation, allowing helical gears to maintain performance under heavier loads and higher speeds. This feature makes them an ideal choice in applications where load capacity is critical.

In contrast, other gear types may have their specific applications and advantages, but they typically do not achieve the same load capacity benefits as helical gears in straightforward scenarios. For example, bevel gears, while useful for changing the direction of power transmission, do not inherently offer the same level of load capacity. Worm gears can provide high reduction ratios but are typically less efficient and can have limitations in load capacity compared to helical gears. Planetary gears are excellent for compactness and high torque in specific configurations but are more complex and vary widely in load capacity depending on the design.

Therefore, the helical gear's ability to provide enhanced load capacity