Page 227 of catalogue Super Precision Bearings of Schaeffler Technologies GmbH & Co. KG

Design of main spindles using BEARINX®
The calculation program for analysis and calculation of complete spindle bearing assemblies

Schaeffler KG offers customers the support they need for the reliable use of Super precision bearings, even at the development stage. A key element in design consultations is the rolling bearing design. Schaeffler KG has successfully applied calculation programs in this area for over 30 years. Computer analysis of rolling bearing under realistically modelled operating conditions at the design stage of bearing arrangements gives time advantages in development and contributes to increased operational security.

1: Deflection of the shaft

2: Calculation of the load distribution in a spindle

BEARINX ® – a leading calculation program With BEARINX ®, Schaeffler Group Industrial has created one of the leading programs for the calculation of rolling bearings. It allows detailed analysis of rolling bearing arrangements – from individual bearings to complex shaft systems, Gearboxes and linear guidance systems. The complete calculation process takes place in a cohesive calculation model. Even in the case of extensive applications, the contact pressure of each individual rolling element is included in the calculation. The current version of BEARINX ® includes a special module for spindle calculation. The functional scope of BEARINX ® takes the influence of centrifugal force on load distribution and running behaviour of rolling elements in angular contact ball bearing, into account.

BEARINX ® takes into account the following factors: • the non-linear elastic deflection of bearings • the elasticity of shafts and Axes • the influence of fits, temperature and speed on the operating clearance or preload of the bearings as well as contact angle • roller and raceway profiles and osculation • changes in contact angle due to loads in Ball bearings and Angular contact ball bearings • the actual contact pressure taking into account skewing and profiling of the rolling elements • the influence of lubrication conditions, contamination and actual contact pressure on the fatigue life of bearings BEARINX ® thus offers the possibility to determine the actual load on Spindle bearings.

BEARINX ® Spindle Calculation offers: • recommendations on mounting fits as a function of the specified speed • calculation of design parameters for contact pressure and kinematics in the bearing • kinematic bearing frequencies for vibration analyses • calculation of the rigidity of the bearing arrangement at the operating point taking into account all relevant influences • shaft reactions such as shaft deflection and shaft inclination • critical speeds and diagrammatic representation of the inherent forms • calculation of fatigue life in accordance with ISO 281, Appendix 4 • further information is available upon request

3: Request for bearing calculation (right)

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