Gear transmission is the mechanism responsible for the drive transmission, and its toothing can be produced with gear milling cutters, hobs, broaches and Fellows shaper cutters. In gears, we distinguish two parts - the driving part, i.e. the active part and the driven part, the so-called passive part.

In toothed gear transmissions, both the active and passive parts, dependable on the characteristics, are called toothed shafts or spline shafts, for which the characteristic feature is tooth cut directly or by inserting a separately cut gear, most often with a keyway connection.

Transmissions are divided into:

• electric,

• hydraulic,

• pneumatic,

• mechanical,

• string (flat, wedge, rope and chain),

• friction,

• toothed (gear).

The tools for their production are used as follows: a gear milling cutter, hob, broach, push broach or Fellows shaper cutter.

The tools for checking their dimensions are plug and ring Go and No Go gauges

Gear transmission compared to other transmissions

Each type of transmission differs from the others in terms of possible transmission power, peripheral speed, relative cost, efficiency, and reciprocal gearing ratio.

According to Ochęduszko, a mechanical toothed transmission, compared to other transmissions, has:

• relative cost in relation to friction gears up to 275%, but it is still lower than the cost of a rope gear achieving the same power,

• by far the highest efficiency, up to around 99%,

• high gearing ratio, the standard gearing ratio is about 12 (the exception is the worm-worm wheel pair, in this case the gearing ratios can be several times higher, but it is burdened with faster heating and lower efficiency),

• compact and closed structure resulting in high durability and reliability,

• low cost of implementation,

• the greatest advantage in the form of gear stability, which, due to the lack of slip, has a significant impact on the quality of the entire transmission, leveling vibrations, durability of the entire drive systems, and further also the entire machines.

Gears, toothed shafts and splines, i.e. the elements that make up the gear transmissions can be produced with our gear milling cutters, hobs, Fellows shaper cutters and broaches. Later on they can be verified with plug and ring Go and No Go gauges.
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Źródła:

[1] - Ochęduszko K., Koła zębate, tom 2 wykonanie i montaż, Wyd. VI (reprint), 3 dodruk, WNT, Warszawa, 2015, ISBN 978-83063623-05-0