Bearings precision levels

[isladelobos]

Here in this web (http://www.timken.com/ES-ES/SOLUTIONS/MACHINETOOLS/Pages/BearingPrecisionLevels.aspx) see the different precision levels from a bearing,

Are our dual vee bearings a good level?



Bearing Precision Levels

Machine tool builders can choose from different levels or classes of bearing precision to meet their specific requirements. Timken tapered roller bearings are available in a complete range of precision classes. This table provides broad guidelines for bearing class selection.



From lowest to highest precision



Class C / 3

* Low precision machines
* Drills
* Conventional lathes
* Milling machines
* Precision gear drives



Class B / 0

* NC lathes
* Milling/boring machines
* Machining centers



Class A / 00

* Grinding machines
* Jig boring machines
* Workpiece spindles (cylindrical grinder)



Class AA / 000

* High accuracy machines
* Precision measuring instruments
* Special applications

[Gerald D]

In that language, the MM is a "Low precision machne" and the wheels have a very low max speed.