Knowledge of bearings
Index
1.Types of rolling bearings and characteristics
   
Types of rolling bearings and characteristics --- Deep groove ball bearings
Types of rolling bearings and characteristics ---Angular contact ball bearings
Types of rolling bearings and characteristics --- Cylindrical roller bearings
Types of rolling bearings and characteristics --- Tapered roller bearings
Types of rolling bearings and characteristics --- Spherical roller bearings
Types of rolling bearings and characteristics --- Needle roller bearings
Types of rolling bearings and characteristics --- Thrust ball bearings
Types of rolling bearings and characteristics --- Spherical thrust roller bearings
Outline of bearing selection
2.Example of bearing arrangements
   
Fixed and free sides are distinguished
Fixed and free sides are not distinguished
Vertical shafts
Gear transmission two-point-support system
3.Bearing service life and selection
   
Basic dynamic load rating
Selection based on service life
Basic static load rating and safety coefficient
Allowable axial load for cylindrical roller bearings
4.Tolerances for bearings
   
Bearing type and tolerance class
Radial bearing (tapered roller bearings excluded) --- Inner ring
Radial bearing (tapered roller bearings excluded) --- Outer ring
Metric series tapered roller bearings --- Inner ring
Metric series tapered roller bearings --- Outer ring
Metric series tapered roller bearings --- Bearing width
Metric series double/four-row tapered roller bearings
Inch series tapered roller bearings --- Inner ring
Inch series tapered roller bearings --- Outer ring
Inch series tapered roller bearings --- Runout
Inch series tapered roller bearings --- Bearing width
Metric J series tapered roller bearings
Thrust ball bearings
Spherical thrust roller bearings
Tolerances and permissible values for tapered bores
Permissible values for chamfer dimensions
5.Limiting speed
   
Limiting speed of bearings
Correction of limiting speed
Consideration for high speed
Friction coefficient of bearings
Passing vibration frequency
6.Fits
   
Bearing fits --- Purpose and selection
Bearing fits --- Load characteristics
Bearing fits --- Load magnitude
Bearing fits --- Surface roughness
Bearing fits ---Temperature
Bearing fits --- Maximum stress of bearing
Recommended fits --- radial bearing --- Shaft
Recommended fits --- radial bearing --- Housing
Recommended fits --- extra-small/miniature ball bearings
Recommended fits ---Metric J series tapered roller bearing --- Shaft
Recommended fits --- Metric J series tapered roller bearing --- Housing
Recommended fits --- Inch series tapered roller bearing --- Shaft
Recommended fits --- Inch series tapered roller bearing --- Housing
Recommended fits --- Thrust bearings
Recommended fits --- Rolling mill roll neck bearings --- Metric series tapered roller bearings
Recommended fits --- Rolling mill roll neck bearings --- Inch series tapered roller bearings
Recommended fits --- Rolling mill roll neck bearings --- Cylindrical roller bearings
Recommended fits --- Needle roller bearings
7.Internal clearance
   
Internal clearance of bearing
Operating clearance
Clearance specifications --- Deep groove ball bearings
Clearance specifications --- Extra-small/miniature ball bearings
Clearance specifications --- Matched pair angular contact ball bearings
Clearance specifications --- Double-row angular contact ball bearings
Clearance specifications --- Self-aligning ball bearings
Clearance specifications --- Cylindrical roller bearings and machined ring needle roller bearings
Clearance specifications --- Spherical roller bearings
Clearance specifications --- Double/four-row and matched pair tapered roller bearings
Recomended internal clearance
8.Preload
   
Purpose and method of preload
Amount of preload --- Matched pair angular contact ball bearings
Amount of preload --- Thrust bearings
9.Lubrication
   
Grease lubrication --- Grease
Grease lubrication --- Amount of grease
Grease lubrication --- Grease feeding interval, grease life
Oil lubrication --- Lubricating oil
Oil lubrication --- Kinematic viscosity
Oil lubrication --- Lubricating methods --- Oilbath
Oil lubrication --- Lubricating methods --- Forced oil circulation
Oil lubrication --- Lubricating methods --- Oil jet lubrication
Oil lubrication --- Lubricating methods --- Oil mist lubrication
Oil lubrication --- Lubricating methods --- Oil/air lubrication
10.Materials
   
Outer/inner ring and rolling element materials --- High carbon chromium bearing steel
Outer/inner ring and rolling element materials --- Case hardened steel
Outer/inner ring and rolling element materials --- Steel for Standard JTEKT Specification Bearings
Outer/inner ring and rolling element materials --- Other materials
Materials used for cages
11.Shaft/housing design
   
Shaft designs
Sealing devices
Oil seals
12.Handling of bearings
   
General instructions
Mounting methods --- Press fit of bearings with cylindrical bore bearings
Mounting methods --- Shrink fit of bearings with cylindrical bore bearings
Mounting methods --- Tapered bore bearings
Test run
Dismounting method --- Dismounting of cylindrical bore bearings
Dismounting method --- Dismounting of tapered bore bearings
Dismounting method --- Dismounting of outer rings
Maintenance and checking
Checking --- Noise checking
Checking --- Temperature checking
Checking --- Lubricant checking
13.Bearing failures and countermeasures
   
Flaking
Cracking, Chipping
Brinelling, Nicks
Pear skin, Discoloration
Scratch, Scuffing
Smearing
Rust, Corrosion
Electric pitting
Wear
Fretting
Creeping
Damage to Retainer
Seizure