Crane Duty Gear Box

Helical gears are one type of cylindrical gears where the teeth are curved into a helix shape. Compared to spur gears (straight teeth), properly designed helical gears can have a larger total contact ratio which can improve vibration and noise. Badly designed helical gears can be noisier than well designed spur gears.When crossed helical gears are used, they can be of either the same or opposite hands. If the gears have the same hands, the sum of the helix angles should equal the angle between the shafts. The most common example of this are crossed helical gears with perpendicular (i.e. 90 degree) shafts.The most common use for helical gears is in automotive transmissions. Helical gears are ideal for high-speed applications because they suffer from less friction and wear than other gears, but they're still capable of transferring significant amounts of force.