The teeth of a helical gear are set at an angle (in accordance with axis of the apparatus) and take the shape of a helix. This enables one’s teeth to mesh steadily, starting as point contact and developing into line contact as engagement progresses. One of the most noticeable advantages of helical gears over spur gears is certainly much less noise, especially at medium- to high-speeds. Also, with helical gears, multiple teeth are always in mesh, this means less load on each individual tooth. This results in a smoother transition of forces from one tooth to the next, to ensure that vibrations, shock loads, and wear are reduced.
However the inclined angle of the teeth also causes sliding contact between your teeth, which helical gear china produces axial forces and heat, decreasing effectiveness. These axial forces play a significant function in bearing selection for helical gears. Because the bearings have to endure both radial and axial forces, helical gears require thrust or roller bearings, which are typically larger (and more expensive) than the simple bearings used with spur gears. The axial forces vary compared to the magnitude of the tangent of the helix angle. Although larger helix angles offer higher acceleration and smoother movement, the helix position is typically limited to 45 degrees due to the creation of axial forces.