What type of gear features teeth arranged in a V pattern?

Double helical gears, often recognized for their unique tooth arrangement, are characterized by teeth that are set in a V pattern. This design features two sets of teeth that spiral in opposite directions on the same gear, forming a "V" shape when viewed from the side.

The double helix configuration significantly improves load distribution across the teeth because it engages more than one tooth pair at a time. This reduces the tendency for the gear to slip and diminishes axial thrust, which is a common issue in other gear types such as spur gears or single helical gears. The benefits of this design include smoother operation, quieter performance, and a greater ability to handle higher loads.

In contrast, spur gears have straight teeth aligned parallel to the axis, while crown gears have teeth that are oriented perpendicular to the gear axis, and blade gears do not have a standardized definition in gear terminology. Thus, the unique V pattern of teeth in double helical gears sets them apart, making them the correct choice for this question.