Helical gear is a cylindrical gear with a slanted tooth trace. A higher contract level, less vibration, quietness, and an ability to transfer larger loads make a helical gear more efficient than a spur gear. A set of helical gears has an identical helix angle and helix hand on the opposite side.
A helical gearbox is just a set of helical gears. The spur gear hobbing tool and machine can be used to develop helical gears just by tilting the hobbing instrument with the reference part of the gear in the standard form. We can categorize the helical gears into two forms. One -With the reference section of the gears being in the turning plane (Transverse module) and two- with the reference section of gears being in the standard plane (normal module). The center gap in a helical gear is as same as the spur gear and the reference component is in the turning plane if they have the same number of teeth and identical modules. This is simple swapping with the spur gear.
A Spur gear does not create axial thrust loads, while a helical gear generates axial thrust force due to the twist in the tooth trace, and to absorb this load, it is suitable to use bearings. When we combine right-hand and left-hand helical gears to make a double helical gear, it will remove the thrust force.
Generally, an industrial gearbox manufacturer proposes helical gearbox to operate under heavy power efficiency and a silent performance such as automotive systems. Some of the applications are
- Steel mills, rolling, power application and port.
- Printing industries, fertilizer industries, and earth-moving industries
- Plastic, textile, food and oil industries, conveyors, elevators, blowers, Compressors and cutters
Helical Gearboxes are the most effective devices constructed in the industry and work at 98% efficiency just after Planetary types. In helical gear, the angle teeth engage more slightly than in spur gear. That’s why helical gear operates more smoothly. Helical gearboxes are the durable and preferred choice for high-load cases. Helical gearboxes can transfer motion and power between parallel as well as right-angle configurations. Helical gearboxes can also be used in conveyors, crushers, cranes, mixers, extruders, and coolers all of these are low-power systems.