The same standards apply to helical gears as for spur gears Helical gears can be run at speed exceedingĥ0m/s when accurately machined and balanced. ![]() Spur gearsĪre generally not run at peripheral speed of more than 10m/s. This is a smoother cycle than a spur which has an initial line contact. In operation the initial tooth contact of a helical gear is a point which develops into a full lineĬontact as the gear rotates. Helical gears generate axial shaft forces in addition to the radial shaft force generated by normal spur gears. Provides a smoother mesh and can be operated at greater speeds than a straight spur gear. Meshed helical gears can be at an angle to each other (up to 90 o ). Hand is in the direction of the slope of the teeth). ( Alternatively if a gear rests on its face the A helical gear is termed right handed or left handed as determinedīy the direction the teeth slope away from the viewer looking at the top gear surfaceĪlong the axis of the gear. Helical gears are similar to spur gears except that the gears teeth are at an angle with Drive_Index Gears Gearboxes Helical Gears Introduction
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