Gears

Double helical or herringbone gears

Double helical gears, or herringbone gear, overcome the problem of axial thrust presented by "single" helical gears by having two sets of teeth that are set in a V shape. Each gear in a double helical gear can be thought of as two standard mirror image helical gears stacked. This cancels out the thrust since each half of the gear thrusts in the opposite direction. Double helical gears are more difficult to manufacture due to their more complicated shape.

B & H Gears produce all sizes of double helical or herringbone gear in a wide variety of materials.

Face gears

A face gear normally consists of a disc shaped gear grooved on a least one side, in combination with a spur, helical or conical pinion. A face gear has a planar pitch surface and a planar root surface, both of which are perpendicular to the axis of rotation. It can also be referred to as a face wheel, crown gear, crown wheel, contrate gear or contrate wheel. B & H gears manufacture all types of face gears, use the contact us link above or phone us on 0161 627 4610.