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Technical Info
Mniature Radial Ball Bearings - Overview
Miniature Radial Ball Bearings Component identification
Ball Bearings - Types
Ball Bearings - Nomenclature
Materials
Chrome steel
Stainless steel
Cages/Retainers
Shields and Seals
Ball Bearings - Geometry
Raceway curvature
Radial and axial play
Standard Radial play ranges and Ball Bearings - Applications
Contact angle
Graph of Initial Contact Angle vs Radial Play
Land and pitch diameter
Free angle of misalignment
Miniature Radial Ball Bearing Tolerances
ABEC and ISO tolerances
ABEC/ISO charts
Inner ring tolerances
Outer ring tolerances
Ball Bearings - Lubrication
Purpose of ball bearing lubrication
Ball Bearing Lubricant types
Ball Bearing Grease components
Grease characteristics
Lubrication methods
Lubricant shelf life
Speed limitation (lubricant factor)
Lubricant charts
Oil Lubricants
Grease Lubricants
Load Rating and ball Bearing Life
Basic bearing fatigue life
Temperature correction factor
General correction factor
Maximum static load
Equivalent dynamic load
Equivalent load nomographs
Axial Load nomograph
Radial Load nomograph
Predicted bearing life
Ball Bearings - Torque
Ball Bearings - Torque factors
Average Ball Bearing torque
Ball Bearing Noise
Mounting and Fitting
Recommended fits
I
nterference fits
Shoulder design
Relative thermal expansion
Preload
Preload assembly methods
Preload calculation
Bearing Handling
Contamination
Excessive force
Moisture and humidity
Alignment
Magnetism
Adhesive Practices
Adhesive types
Adhesive grooves
Applying adhesive
Assembly Characteristics
Torque analysis
Stiffness
Resonance
Useful Conversions
  
 
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BALL BEARINGS OVERVIEW


Ball Bearings Overview.

For ball bearings, single-row deep groove radial ball bearings are the most common type of miniature radial ball bearings, having a wide range of suitable applications. The raceway grooves on both inner and outer rings have circular arcs of slightly larger radius than that of the balls. In addition to radial loads, axial loads can be applied in either direction. Because of their low torque, they offer high speed operation with low power loss. ball bearings and instrument radial ball bearings are made with very high levels of precision, therefore these are generally used in applications where accurate rotational performance and low torque is necessary, and load capacity is a secondary issue.

Ball Bearings - Tables
The ball bearings listed in these ball bearing tables are available in a variety of different grades. As discussed, ABEC and ISO standards only cover part of the overall picture for ball bearings, particularly for more demanding applications. Beyond the basic dimensions and tolerances of ball bearings, characteristics such as raceway finish, cage quality, ball matching and consistency of internal geometry can affect the performance of an individual bearing in its application. These characteristics are generally determined by the level of sophistication of the equipment used to manufacture the ball bearings. This sophistication, in turn, affects the cost and availability of the bearing. All Dynaroll bearings are guaranteed to meet stated performance specifications, and bearing quality is monitored according to ISO 9000 quality standards. It is recommended that demanding applications for ball bearings are discussed with a bearing engineer at Dynaroll.


BALL BEARINGS - COMPONENT INDENTIFICATION



BALL BEARINGS - TYPES

Standard Open
Standard Shielded
Flanged Open
Flanged Shielded