Engineering Application & Design

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A bearing is a machine element that constrains relative motion and reduces friction between moving parts to only the desired motion. The design of the bearing may, for example, provide for free linear movement of the moving part or for free rotation around a fixed axis; or, it may prevent a motion by controlling the vectors of normal forces that bear on the moving parts. Many bearings also facilitate the desired motion as much as possible, such as by minimizing friction. Bearings are classified broadly according to the type of operation, the motions allowed, or to the directions of the loads (forces) applied to the parts.

• Angular Contact Bearings - Review Angular contact bearings are constructed such that their races and the bearing balls contact points are at some angle relative to the axis of the operating axis of the bearing.
• Angular / Radial Contact Ball Bearings Static Load Rating Static load rating for Angular / Radial Contact Ball Bearings, use the following the equation:
• Ball and Roller Bearing Analysis for Loading and Selection Formulas and Calculator
• Ball Bearings Design, Construction, and Mounting Premium Membership required to access
• Ball Bearings Designations, Loading, Assembly Configurations AFBMA Code and Description - Ball Bearings
• Ball Bearings Fatigue Life Calculations and Load Ratings Fatigue life calculations assume the dispersion in life of identical ball bearings operating under identical conditions, a statistical result is obtained for bearing fatigue life.
• Ball Bearings Application and Standard Designations The single-row deep-groove radial contact ball bearings will take radial load well and some thrust load.
• Ball Screw Support Bearings Ball screw is a mechanical linear actuator that translates rotational motion to linear motion with little friction.
• Ball Bearings ABEC Tolerances The ABEC scale is an industry accepted standard for the tolerances of a ball bearing. It was developed by the Annular Bearing Engineering Committee (ABEC) of the American Bearing Manufacturers Association (ABMA)
• Bearing Shaft and Housing Installation Tolerances Size and fit tolerances for bearing mating shafts and housing are provided within the tables below are defined by ISO tolerances for shafts and housings (ISO 286) in conjunction with the tolerances Δdmp for the bore and ΔDmp for the outside diameter of the bearings per. (DIN 620).
• Bearing Application Table Chart Bearing design data presented here provides guidelines and reference for the identification of potential bearing application.
• Bearing Design for Life and Selection Calculator
• Bearings and Their Applications, Alex Weiss, 2008
• Bearings and Their Lubrication Premium Resource
• Bearings, Design, Friction, Lubrication - Bearing Materials, Third Edition, Revised and Enlarged
• Bearings and Lubrication Application Generators Several types of bearings, each with specific lubrication requirements, are used on the generators.
• Bearing Life Formula Based on Speed, Load and Hardness, Ball Bearings, Radial Bearings, Thrust Bearings Ball Bearings life is related to load and speed of rotation, and this relationship must be considered when selecting bearings for various speed and life requirements.
• Bearing Load Calculator Excel Spreadsheet Design engineering spreadsheet calculates the loads on linear motion bearings. *Premium Membership Required*
• Bearing Types and Application Design, Ball Bearings, Roller Bearings, Thrust Bearing Type Description Friction Stiffness † Speed Life Notes Plain bearing Rolling element bearing Jewel bearing Fluid bearing Magnetic bearings Flexure bearing
• Bearing Types and Representation - Ball Bearings, Roller Bearings, Thrust Bearings, Needle Bearings Bearing Types and Representation - Ball Bearings, Roller Bearings, Thrust Bearings, Needle Bearings.
• Bearing Materials Review The most common material used to produce the load carrying components in precision ball bearings, roller bearings, and tapered roller bearings is 52100 chrome steel.
• Bearing Selection, Comparison and Application , Ball Bearings, Radial Bearings, Thrust Bearings, Needle Bearings Bearing Type Pure Radial Load Pure Axial load Combined Load Moment Load High Speed High Running Accuracy
• Bushing and Plain Bearings Press or Shrink Fit Design and Application Press fit or shrink fit bushing design and installation is a common method of retaining bearings by use of interference between the bushing and the bushing hole.
• Ceramic Bearings Ceramic bearings offer many advantages over all steel bearings, such as higher speed and acceleration capability, increased stiffness, lower friction and more.
• Critical Speeds of Rotating Shafts or Mass Review The center of a rotating mass is always offset from the center of rotation. This is due to the reality of imperfect geometry and uneven mass distribution.
• Critical Speeds of Rotating Shafts with Single Loads When calculating critical speeds, the weight or mass of the rotating cylinder or shaft is assumed to be zero or add 1/2 to 2/3 of the rotating shaft to the load mass.
• Critical Speeds of Rotating Shafts with Distributed Loads Critical Speeds of Rotating Shafts with Distributed Loads - First Critical Speed
• Design of Aerostatic Bearings Premium Membership required
• Design and Application of Antifriction Bearing Selection For each bearing type, a data base which contains boundary dimensions, basic load ratings, limiting speeds, mass, company name and load factors of bearings is created.
• Distance Between Bearings on Shaft Design Formula and Calculator
• Efficiency Calculation of Sliding Contact Bearing Supported Pulley This calculator will determine the efficiency of a pulley supported by a contact bearing.
• Elastomeric Bearing Pad Equations (for an approximation of displacement)
• Floating Bearing Shaft Length Design and Calculator
• Force Analysis Four Point Contact Ball Bearings Four point contact ball bearings are capable of resisting radial, thrust, and moment loads, it is ordinarily subjected to a combination of two or more of these loads wherever it is applied.
• Journal Bearing Lubrication Analysis Formulas and Calculator The primary advantage of a fluid film bearing is often thought of as the lack of contact between rotating parts and thus, infinite life.
• Miniature Bearings Application Miniature bearings commonly used in fractional horsepower motors, domestic appliances, precision instruments, tape recorders and similar devices.
• Petroff's Hydrodynamic Lubrication Formula and Calculator
• Precision Bearings Applications This class of bearings which the bearings components are manufactured to extra tight tolerances for use at high speeds, radial and thrust loads.
• Radial / Deep Groove Ball Bearings Are constructed of one row of balls ( referred to as single row ), which revolves around the groove of the inner and outer ring or race.
• Rolling Element Bearings Analysis Premium membership required
• Rolling Bearings Gauging Practices Premium membership required
• Shaft Tolerance Classifications for Metric Radial Ball and Roller Bearings of ABEC-1 and RBEC-1 Tolerance Classes ANSI/ABMA 7
• Shaft to Shaft Axial Alignment Design Tolerances Tables Design for shaft-to-shaft alignment is the positioning of the rotational centers of two or more shafts so that the shafts are co-axial when the machine is in operation.
• Housing Hole Tolerance Classifications for Metric Radial Ball and Roller Bearings of ABEC-1 and RBEC-1 Tolerance Classes
• Stainless Steel Bearings Stainless steel bearings are preferred where corrosion and chemical resistance are required.
• Sprocket Center Distance for a Roller Chain of known Length Equation and Calculator
• Tapered Roller Bearing Setting Methods
• Thrust Ball Bearings Magnitude of Life Ratings Use the following equation to calculate the magnitude of life rating .
• Thin Section Bearings Application Considerations There are three types of thin-section bearings: radial contact, angular contact, and four-point contact bearings.
• Thrust Chart Thrust is a reaction force described quantitatively by Newton 's second and third laws .
• Flat Thrust Plate Bearing Design Equation and Calculator Fluid thrust bearings contain a number of sector-shaped pads, arranged in a circle around the shaft, and which are free to pivot.
• Step Thrust Plate Bearing Design Equation and Calculator
• Tapered Land Thrust Plate Bearing Design Equation and Calculator
• Tilting Pad Thrust Plate Bearing Design Equation and Calculator
• Typical Bearing Life in hours for Various Design Applications
• Vibration of Bearings Analytical determination of vibrations and friction torque due to rotation, taking into account the hydrodynamic action of a lubricating oil film, and determination of the elastic and damping characteristics of bearings and bearing assemblies are some of the problems considered in this book.