General basics

Preload

The bearings are preloaded so that it is possible to rotate and swivel backlash-free in all load situations during operation. Here it is necessary to support the bearing accurately. This requires above all appropriately rigid and precise adjacent constructions provided by the user.

Design strength

The bearings deform due to the application of the preload. The quality of the adjacent construction prevents negative effects on these normal settling and adaptation processes. All bearings are designed for the conventional applications described in the product chapters; it is essential that deviating installation cases are discussed with myonic.

Radial runout

The radial runout accuracy of the bearing can only be transferred onto the machine tool axis with appropriate backlash-free fits of the rotating connecting parts. Clearance fits frequently lead to radial runout problems.

Axial runout accuracy

In the case of the construction series AXDR / AXCR, the axial runout accuracy is always applied to the face opposite the counterbores.
Please refer to the product tables for information on the accuracy requirements for the corresponding bearings.

Repeatability

Due to the extremely high manufacturing accuracy, the non-compensable repeat errors for deformed, uninstalled bearings amount to a maximum of 1.5 μm. For most of the construction series, the repeatability is measured in assembly. These values can be requested from myonic using the serial number of the bearings.

Installation height tolerance

For the connection of drives, for example worm gears, or for the production of defined sealing gaps, several bearing types feature limited tolerances in construction height. These connection dimensions are shown in the product tables. You can receive further information or possibilities for tolerance limitation via myonic application engineering.

Operating temperature

All bearing types are suitable for operating temperatures from -30°C to +120°C.
The actual operating temperature of a machine tool axis is influenced by many factors.
The heat from the bearing friction (bearing and lubricant), distortion from assembly, dragging additional parts, the introduced forces (mass, cutting force) and external heat sources such as the drive are incorporated.
The heat can be dissipated to the environment or to additional cooling devices.
myonic internal test results always refer to the bearing and the lubrication.
Further details on the operating temperature and influence factors are presented in the product chapter AXRY-NGS.