TGB Group - Coronas de orientación - Coronas giratórias | Accessories and engines
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Accessories and engines

Bearing, Planetary Gearboxes and Motorizations

A bearing is a mechanical element that reduces the friction between a shaft and the pieces connected with it thanks to the rolling elements inside, which works as a holder to transmit the loads and helps to its rotation.


The rotation elements that can be used on the production of the bearing are: balls, rollers or needles. The bearings can also be classified depending on the load’s direction that they have to withstand: axial, radial or a combination or both.


The radial type is the one that withstands radial loads, which are loads on the normal direction to the axis direction that crosses its center (like a wheel), axial if it withstands loads on the same direction of its axis (like a hinge); and axial-radial if it withstands both.


Each bearing shows different characteristics depending on its design, making it more or less appropriated for each application.
The most common types are:

  • Deep groove ball bearings.
  • Axial deep groove ball bearings (single or double row).
  • Cylindrical roller bearings (single or double row).
  • Tapered roller bearings.
  • Needle bearings.

Planetary Gearboxes:
Planetary gearboxes allow reducing motor speed increasing to the maximum the output torque. Those can be supply as a part of an adapted solution to the client’s needs on drives, all together with motors or even with pinions for slewing rings.

Depending on each case and need of the client, we offer different solutions of motors/motorizations. Most common used motors are: Hydraulics (working on a range of 25 to 400cm3/rev.); direct current electric motors with inner reduction (it’s possible to provide them with or without encoders); alternating current electric motors which can be supplied with all kind of gearboxes (most used range between 0.09 to 3 Kw power).
There is also the possibility to design and produce manual systems like cranks.