Advantages of Cycloidal gear teeth

1. Since the cycloidal teeth have wider flanks, therefore the cycloidal gears are stronger than the involute gears, for the same pitch. Due to this reason, the cycloidal teeth are preferred especially for cast teeth.

2. In cycloidal gears, the contact takes place between a convex flank and a concave surface, where as in involute gears the convex surfaces are in contact. This condition results in less wear in cycloidal gears as compared to involute gears. However the difference in wear is negligible

3. In cycloidal gears, the interference does not occur at all. Though there are advantages of cycloidal gears but they are outweighed by the greater simplicity and flexibility of the involute gears.

S.No.

Involute tooth gears

Cycloid tooth gears

The profile of involute gears is the

The profile of cycloidal gears is double

single curvature.

curvature

i.e.

epicycloid

and

hypocycloid.

The pressure angle from start of

The pressure angle varies from start of

engagement of teeth to the end of

engagement to end of engagement,

engagement remains

constant,

which results into less smooth

which results into smooth running.

running.

Manufacturing of involute gears is

Manufacturing of cycloidal gears is

easy due to single curvature of

difficult due to double curvature of

tooth profile.

The

involute

gears

have

The cycloidal gears do not have

interference problem.

More wear of tooth surface.

Less wear as convex face engages with

concave flank.

The strength of involute teeth is less

The strength of cyloidal teeth is

due to radial flanks

comparatively more due to wider

flanks.