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Helical & Spur Gears

Gears are used in a wide range of engineering designs so that power may be transmitted steadily and without slip. They are also commonly used within mechanical devices where they provide a gear reduction in motorized equipment. This is important because, often, a small motor spinning very fast can provide enough power for a device, but not enough torque. For instance, an electric screwdriver has a very large gear reduction because it needs lots of torque to turn screws, bu­t the motor only produces a small amount of torque at a high speed. With a gear reduction, the output speed can be reduced while the torque is increased.

Another thing gears do is adjust the direction of rotation. For instance, in the differential between the rear wheels of your car, the power is transmitted by a shaft that runs down the center of the car, and the differential has to turn that power 90 degrees to apply it to the wheels.

There are a lot of intricacies in the different types of gears, here are brief descriptions of the three most common gear types that we manufacture:-

Helical Gears
Figure 1. Helical gears

Helical Gears



Because of the angle of the teeth on helical gears, they create a thrust load on the gear when they mesh. Devices that use helical gears have bearings that can support this thrust load.

One interesting thing about helical gears is that if the angles of the gear teeth are correct, they can be mounted on perpendicular shafts, adjusting the rotation angle by 90 degrees as seen below.


Spur Gears

Spur Gears

Spur gears are the most common type of gears. They have straight teeth, and are mounted on parallel shafts. Sometimes, multiple spur gears are used as a single train to create very large gear reductions.

Spur gears are used in many industrial, mechanical devices, but you wont find many in your car.

This is because the spur gear can be less quiet. Each time a gear tooth engages a tooth on the other gear, the teeth collide, and this impact makes a noise. It also increases the stress on the gear teeth.



Worm Gears

Worm Gears




Why our clients choose M&B Precision

With 30 years manufacturing experience, we understand our customer’s requirements are quality, cost and delivery. A comprehensive range of machinery and a skilled workforce allows us the flexibility to handle large and small batch sizes in a wide range of materials.

We have a committed team with technical experience of automotive, optical, aerospace, motor sport and nuclear industries. We offer a one stop solution to your manufacturing requirements and aim to provide total customer satisfaction.