For more than 80 years, Sovereign Gears have been manufacturing specialist straight sided and involute splines for industrial clients across the world.

What are splines?

In terms of gear machinery, splines refer to teeth on a driveshaft that are designed to match up with similar grooves on a gear piece. The operation of the two components transfers torque between the driveshaft and the gear.
For convenience, teeth or ridges are usually referred to as External, or ‘male splines’, whereas grooves are known as Internal, or ‘female splines’

Types of spline

Various types of spline are used in different gear mechanisms:

Straight sided serrated splines

As the name suggests, straight sided serrated splines are teeth that have straight edges rather than curves. The shape of the tooth is triangular, with a flat surface of the apex. Serrated splines can be used on either the internal or external surface of a driveshaft/gear.

Involute splines

Involuted splines are similar to their serrated counterparts, with the difference that the surfaces of the teeth are curved rather than straight. Involute splines are used on spur and helical gears, and can be utilised on internal or external surfaces.

Why choose us?

Our engineering team here at Sovereign Gears are highly experienced in creating the right gear components to match your machinery. Regardless of your industry or the applications you use, we can design and create bespoke gears for new machines, prototypes or replacement parts.

Get a quote

For a custom quote or to find out more, please contact our sales team today on 01530 249 090, or email us at We offer shipping from our UK workshop to anywhere in the world, and guarantee 3 to 5 working day delivery on all orders.


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