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Bearings are the most frequently used machine element in power transmission. A poorly designed rolling bearing can quickly lead to damage of the bearing itself and the drive train. In the worst case, a chain reaction induces the total loss of your complete system. Detailed basic research works (for example PALMGREN, LUNDBERG, GAERTNER, see [1], [3] and [4]), introduced standardized formulas. These formulas enable engineers to properly design and select bearings in terms of carrying capacity by means of the bearings load spectrum. To calculate a reliable lifetime expectancy, the load spectrum must be as realistic as possible. However, due to unknown operational loads and complex interactions between the bearing and the system, the required representational bearing loads are hard to estimate. In addition, the demand on decreasing acoustic emission and detailed transfer path analysis is growing, which raises questions regarding the detailed rolling bearing dynamics and its influence on the system dynamics. To cover all these highly involved design topics confronting engineers required powerful tools for the dynamic roller bearing and system analysis.

Bearings are the most frequently used machine element in power transmission. A poorly designed rolling bearing can quickly lead to damage of the bearing itself and the drive train. In the worst case, a chain reaction induces the total loss of your complete system. Simpack Bearing Modules enable the modeling of various types of rolling bearings such as ball, cylinder and barrel bearings and also also journal bearings and elastohydrodynamic bearings.

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Having said that, it is best to avoid driving with a worn wheel bearing for any length of time. As we’ve already seen, the wheel bearing is essential for connecting your wheel to your car, and any weakness in this connection could have severe consequences for your drive-axle and steering assembly – as well as for your safety.

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Despite the fact that modern wheel bearings are easier to install than previous generations, correct installation, the usage of appropriate tools and respecting the specified torque values are still essential for maximum performance, durability and safety. Therefore, we recommend having your wheel bearings fitted by a professional mechanic that has the skills and the tools to do the job.

Wheel bearings have an average lifespan of 136,000 to 160,000 km (approximately 85,000 to 100,000 miles). This is only a rule of thumb though, the actual lifespan of a wheel bearing depends on the quality of the wheel bearing and the operating conditions.

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To address the mentioned obstacles in Rolling Bearing analysis, Simpack offers the Force Element “Rolling Bearing”. This Force Element efficiently simulates all common types of rolling bearings by resolving the rolling element contacts under consideration of the inner geometry. On one hand, this approach takes the detailed transmitting behavior of a bearing into account, because it considers the non-linear stiffness characteristics, clearance and cross-coupling. The approach also covers the excitations generated by the bearing (for example due to rolling elements passing through the loaded zone). The high efficiency of this Force Element and the consideration of the transmitting and excitation effects of a bearing enable the engineer to generate realistic load spectra, which take the interaction of the rolling bearing with the complete system into account. In terms of carrying capacity, lightweight construction, and acoustic emission, this element makes the design and selection of the best bearing solution easier.

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Analyze load distribution with variant roller profiles: References: [1] Gaertner: Ueber die Lebensdauer von Kugellagern, Dinglers Polytechnisches Journal, 1918 [2] Palmgren, A.: Ball and roller bearing engineering. 2nd Edition. S.H. Burband & Co., Inc., Philadelphia, 1945. [3] ISO 16281: Rolling bearings — Methods for calculating the modified reference rating life for universally loaded bearings. ISO 16281, Technical Specification. June 2018 [4] Schlecht, B.: Maschinenelemente 2: Getriebe, Verzahnungen, Lagerungen. München: Pearson Studium, 2010.

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When replacing your wheel bearings, it is essential to look for high quality parts. MOOG offers a complete range of easy to install, premium quality, long-lasting wheel end bearings that are engineered, manufactured, tested and validated to OEM standards for maximum performance and durability. Explore the full MOOG product range or Discover technical tips about wheel bearings.

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This Force Element can simulate hydrodynamic bearings by solving the Reynolds equation accurately and efficiently. The element includes rigid body hydrodynamics (HD), one-sided elastohydrodynamics (EHF) and double-sided elastohydrodynamics (DEHD). It allows the consideration of global temperature effects (TEHD) in the bearing and the surrounding solids. Special design parameters allow for easy and user-friendly consideration of oil bores, grooves ... Any level of detail can be simulated. The element can also simulate piston ring dynamics.

Journal Bearing is a Force Element used to model radial or axial journal bearings using a nonlinear stiffness and damping law. This Force Element can model any kind of radial or axial bearing where a force law acting on only two Markers would be unsatisfactory. Simpack Journal Bearing acts between several Markers on the shell and one center Marker on the shaft. A 3D effect can be achieved by adding several Force Elements in a row.

Simpack BEARINX Map for Rolling Bearings enables the use of the BEARINX® software from Schaeffler Technologies in Simpack. BEARINX® allows the calculation of accurate bearing forces and torques for many rolling bearings. Non-linear stiffness, coupling effects and bearing clearance are described by a characteristic field in a BEARINX Map (.bxm) file, which Schaeffler Technologies has to provide.

A wheel bearing is a crucial part of the wheel assembly that connects the wheel and the axle. It is a set of steel balls (ball bearings) or tapers (tapered bearings), held together by a metal ring. It enables the wheel to rotate smoothly with a minimum of friction. Wheel bearings are safety critical components designed to sustain radial and axial loads caused by gravitation, acceleration, breaking & cornering forces, so they need to be replaced when they stop working properly.

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Wheel bearings are low maintenance parts, but that doesn’t mean they last forever. So, what does a wheel bearing actually do? How long does it last? And how can you help extend its lifespan?

The content contained in this article is for entertainment and informational purposes only and should not be used in lieu of seeking professional advice from a certified technician or mechanic. We encourage you to consult with a certified technician or mechanic if you have specific questions or concerns relating to any of the topics covered herein. Under no circumstances will we be liable for any loss or damage caused by your reliance on any content.