Macro Defects in Steel - Bearing Defects

Bearing Defects

4-stages of bearing failure - Bearing defects
Abrasion - Bearing defects
Abrasive wear - Bearing defects
Abrasive wear - Bearing defects
Abrasive wear - Bearing defects
Accelerated wear - Bearing defects
Axial crack I - Bearing defects
Axial crack II - Bearing defects
Axial cracks - Bearing defects
Axial cracks occur on raceway surface - Bearing defects
Axial cracks occur on rolling surface - Bearing defects
Axial scratches at roller pitch intervals on raceway surface - Bearing defects
Axial scratches on raceway surface - Bearing defects
Axial scratches on rolling surface - Bearing defects
Axial smearing/scoring – Unacceptable - Bearing defects
Bearing damage - Bearing defects
Bearing damage classification - Bearing defects
Bearing defects
Bearing failure - Bearing defects
Bearing failure - Bearing defects
Bearing life vs. bearing operating setting - Bearing defects
Belt pattern of electrical corrosion accompanied by pits on the raceway surface - Bearing defects
Bluish or purplish discoloration on raceway surface - Bearing defects
Bluish or purplish discoloration on raceway surface - Bearing defects
Brinell and impact damage - Bearing defects
Brinelling - Bearing defects
Brinelling indentation – Unacceptable - Bearing defects
Bruising - Bearing defects
Burns from electric current - Bearing defects
Burns from electric current I - Bearing defects
Burns from electric current II - Bearing defects
Burns from electric current III - Bearing defects
Butterfly areas and early sub-surface cracks at inclusions - Bearing defects
Butterfly – Micro hardness - Bearing defects
Butterfly – Morphology & orientation - Bearing defects
Cage damage - Bearing defects
Cage damage - Bearing defects
Cage is damaged by melting, balls become discolored and melted - Bearing defects
Caked residue of lubricant - Bearing defects
Cam fracture - Bearing defects
Cap shift - Bearing defects
Chipping occurs at the center rib - Bearing defects
Chipping – Unacceptable - Bearing defects
Common bearing defects - Bearing defects
Contamination - Bearing defects
Contamination - Bearing defects
Contamination - Bearing defects
Corrosion - Bearing defects
Corrosion - Bearing defects
Corrosion - Bearing defects
Corrosion - Bearing defects
Corrosion - Bearing defects
Corrosion - Bearing defects
Corrosion - Bearing defects
Corrosion - Rust - Bearing defects
Corrosion - Rust - Bearing defects
Corrosion - Rust - Bearing defects
Corrosion – Maximum permissible - Bearing defects
Corrosion – Unacceptable - Bearing defects
Crack - Bearing defects
Cracks - Bearing defects
Cracks caused be smearing - Bearing defects
Cracks caused by excessive drive-up - Bearing defects
Cracks caused by fretting corrosion - Bearing defects
Cracks caused by rough treatment - Bearing defects
Cracks occur on outside surface - Bearing defects
Cracks propageted outward in the axial and circumferential directions from the flaking origin on the raceway surface - Bearing defects
Craters - Bearing defects
Creep accompanied by scoring of bore surface - Bearing defects
Creep occurs over entire circumference of outside surface - Bearing defects
Current leakage - Bearing defects
Current leakage - Bearing defects
Damage caused by the passage of electric current - Bearing defects
Damage process - Bearing defects
Damaged bearing cages or retainers - Bearing defects
Dark etching areas & white bands - Bearing defects
Dark etching areas – Hardness changes - Bearing defects
Deep seated rust - Bearing defects
Defective bearing - Bearing defects
Defective bearing tables and photographs - Bearing defects
Deformation and wear of a machined high-tension brass cage - Bearing defects
Deformation of the side face of a machined hightension brass cage - Bearing defects
Denting - Bearing defects
Denting/Point-surface-origin (PSO) macropitting - Bearing defects
Depressions and pressure damage - Bearing defects
Dirt embedment - Bearing defects
Dirt on back - Bearing defects
Dirty lubricant - Indentations on raceway - Bearing defects
Dirty lubricant - Indentations on raceway - Bearing defects
Dirty lubricant - Smearing/wear on roller - Bearing defects
Discoloration - Bearing defects
Discoloration and melting of roller rolling surface, adhesion of worn particles from cage - Bearing defects
Discolouration - Bearing defects
Discolouration – Acceptable - Bearing defects
Discolouration – Unacceptable - Bearing defects
Distinctive appearance of spalls - Bearing defects
Distinctive features of subsurface initiated spalls - Bearing defects
Distinctive features of surface initiated spalls - Bearing defects
Distorted crank case - Bearing defects
Early micro cracks on pinion - Bearing defects
Electric current damage - Bearing defects
Electric pitting - Flaking generated around half the raceway - Bearing defects
Electric pitting - Flaking generated around half the raceway - Bearing defects
Electric pitting and staining - Bearing defects
Electric pitting and staining - Bearing defects
Electrical corrosion has a dark color that covers the entire ball surface - Bearing defects
Electrical current damage – Washboarding / fluting (unacceptable) - Bearing defects
Electrical current damage – Washboarding / fluting (unacceptable) - Bearing defects
Electrical damage – Pitting (maximum acceptable) - Bearing defects
Electrical damage – Strings of pitting (unacceptable) - Bearing defects
Electrical damage – Strings of pitting (unacceptable) - Bearing defects
Electrical damage – Strings of pitting (unacceptable) - Bearing defects
Electrical erosion - Bearing defects
Electrical erosion - Bearing defects
Etching cracks in rolling element bearings - Bearing defects
Etching – Corrosion - Bearing defects
Etching/corrosion - Bearing defects
Etching/corrosion - Bearing defects
Excessive endplay - Bearing defects
Excessive loads - Bearing defects
Excessive loads - Bearing defects
Excessive loads - Bearing defects
Excessive preload or overload - Bearing defects
Excessive preload or overload - Bearing defects
Excessive preload or overload - Bearing defects
Excessive roller end heat - Bearing defects
Failure matrix - Bearing defects
Failure of a cage and roller assembly - Bearing defects
Failures from ineffective sealing - Bearing defects
Failures from the passage of electric current - Bearing defects
Failures from vibration - Bearing defects
False brinelling - Bearing defects
False brinelling - Bearing defects
False brinelling - Bearing defects
False brinelling - Bearing defects
False brinelling - Bearing defects
False brinelling - Bearing defects
False brinelling - Bearing defects
False brinelling - Bearing defects
False brinelling occurs on rolling surface - Bearing defects
False brinelling occurs on the raceway - Bearing defects
False brinelling occurs on the raceway - Bearing defects
False brinelling of raceway surface at ball pitch - Bearing defects
Fatigue - Bearing defects
Fatigue - Bearing defects
Fatigue or flaking (defect shown 2 - 3 mm) – unacceptable - Bearing defects
Fatigue or flaking – unacceptable - Bearing defects
Fatigue spall - Bearing defects
Fatique - Bearing defects
Fatique fracture - Bearing defects
Flaking (spalling) - Bearing defects
Flaking caused by axial compression - Bearing defects
Flaking caused by deep seated rust - Bearing defects
Flaking caused by deep seated rust - Bearing defects
Flaking caused by fluting or craters - Bearing defects
Flaking caused by fluting or craters - Bearing defects
Flaking caused by fretting corrosion - Bearing defects
Flaking caused by indentations - Bearing defects
Flaking caused by misalignment - Bearing defects
Flaking caused by oval compression - Bearing defects
Flaking caused by preloading - Bearing defects
Flaking caused by smearing - Bearing defects
Flaking occurs around half of the circumference of the raceway surface - Bearing defects
Flaking occurs diagonally along raceway - Bearing defects
Flaking of ball surface - Bearing defects
Flaking of only one raceway over its entire circumference - Bearing defects
Flaking of only one raceway over its entire circumference - Bearing defects
Flaking of only one row of raceway - Bearing defects
Flaking of raceway at ball pitch - Bearing defects
Flaking of raceway at ball pitch - Bearing defects
Flaking of raceway at ball pitch - Bearing defects
Fluting - Bearing defects
Fluting - Bearing defects
Fluting occurs on the raceway surface (High frequency) - Bearing defects
Fluting occurs on the raceway surface (High frequency) - Bearing defects
Forced fracture - Bearing defects
Fracture and cracking - Bearing defects
Fracture occurs at the cone back face rib - Bearing defects
Fracture occurs at the large rib - Bearing defects
Fracture occurs at the outer ring rib - Bearing defects
Fracture of machined high-tension brass cage - Bearing defects
Fracture of pressed-steel cage-pocket - Bearing defects
Fracture – Unacceptable - Bearing defects
Fracture – Unacceptable - Bearing defects
Fractures and cracking - Bearing defects
Fretting - Bearing defects
Fretting - Bearing defects
Fretting corrosion - Bearing defects
Fretting corrosion - Bearing defects
Fretting corrosion - Bearing defects
Fretting corrosion - Bearing defects
Fretting corrosion bands - Bearing defects
Fretting occurs on the bore surface - Bearing defects
Fretting occurs on the raceway surface at roller pitch intervals - Bearing defects
Fretting on one race of each bearing - Unacceptable - Bearing defects
Fretting on outer diameter - Unacceptable - Bearing defects
Fretting wear of raceway and stepped wear on the rib face - Bearing defects
Frosted raceway surface - Bearing defects
Full-scale CRB smearing test program I - Bearing defects
Full-scale CRB smearing test program II - Bearing defects
Full-scale CRB smearing test program III - Bearing defects
Galling - Bearing defects
Geometric stress conc. (GSC) spalling - Bearing defects
Geometric stress concentration (GSC) spalling - Bearing defects
Handling and installation damage - Bearing defects
Handling damage resulting in nicks in the raceways – Unacceptable - Bearing defects
Handling damage to the cage – Unacceptable - Bearing defects
Handling damage to the roller body – Unacceptable - Bearing defects
Heat discoloration - Bearing defects
High spots and fitting practices - Bearing defects
Hot short - Bearing defects
Impact load - Cracks and chips - Bearing defects
Impact load - Flaking at intervals on ball pitch - Bearing defects
Impact load - Retainer broken - Bearing defects
Impact load - Seizure caused by chios and ribs - Bearing defects
Improper adjustment - Seizure at roller end surface - Bearing defects
Improper adjustment - Smearing - Bearing defects
Improper fit - Creep - Bearing defects
Improper fit - Fretting corrosion - Bearing defects
Improper fit - Scuffing - Bearing defects
Improper fit in housings or shafts - Bearing defects
Improper handling - Bearing defects
Improper lubrication - Heat discoloration - Bearing defects
Improper lubrication - Scuffing - Bearing defects
Improper lubrication - Wear - Bearing defects
Improper mounting - Bearing defects
Inadequate lubrication - Bearing defects
Inclusion origin spalling - Bearing defects
Inclusion origin spalling - Bearing defects
Incorrect grease - Bearing defects
Incorrect installation - Bearing defects
Indentation - Bearing defects
Indentation Brinelling – Marginal - Bearing defects
Indentations - Maximum permissible - Bearing defects
Indentations caused by faulty mounting or overloading - Bearing defects
Indentations caused by foreign particles - Bearing defects
Indentations on raceway surface - Bearing defects
Indentations – Unacceptable - Bearing defects
Indentats by handling - Bearing defects
Inner ring fretting both sides – Unacceptable - Bearing defects
Inner ring fretting one side – Unacceptable - Bearing defects
Installation damage around location pin hole – Unacceptable - Bearing defects
Large spalls - Bearing defects
Light wear/fretting – Acceptable - Bearing defects
Light wear/fretting – Marginal - Bearing defects
Lip fractures - Bearing defects
Loose fits - Bearing defects
Loose fits - Bearing defects
Lubricant degradation - Bearing defects
Lubricant failure - Bearing defects
Lubricant failure - Bearing defects
Lubricant failure - Bearing defects
Macropitting - Bearing defects
Many pits occur due to electrical corrosion and waveshaped wear on raceway surface - Bearing defects
Misalignment (inclination of bearings) - Flaking on oppossite faces raceway - Bearing defects
Misalignment (inclination of bearings) - Retainer broken - Bearing defects
Misalignment (inclination of bearings) - Symmetrical fretting - Bearing defects
Misalignment - Bearing defects
Misalignment - Bearing defects
Misalignment - Bearing defects
Misalignment - Bearing defects
Misalignment and inaccurate seat and shoulder machining - Bearing defects
Mishandling - Dents on retainer - Bearing defects
Mishandling - Flaking at intervals on roller pitch - Bearing defects
Mishandling - Scratches/scuffing - Bearing defects
Mishandling - Scuffing on bore surface - Bearing defects
Moisture corrosion - Bearing defects
Moisture corrosion - Bearing defects
Most often production defects - Bearing defects
Multiple spall - Bearing defects
Normal fatigue - Bearing defects
Normal fatigue failure - Bearing defects
Normal fatique failure - Bearing defects
Normal wear - Bearing defects
Normal wear - Bearing defects
Notable fretting occurs over entire circumference of bore surface - Bearing defects
Oil starvation - Bearing defects
Origin is directly beneath the raceway surface - Bearing defects
Outer ring fracture - Bearing defects
Outside diameter corrosion – Unacceptable - Bearing defects
Outside surface crack developing on the raceway - Bearing defects
Over heating - Bearing defects
Overfilling - Bearing defects
Overheating - Bearing defects
Overheating - Bearing defects
Overheating - Bearing defects
Overlapping - Bearing defects
Overlay fatigue - Bearing defects
Overload - Bearing defects
Partial smearing occurs circumferentially on raceway surface - Bearing defects
Partial smearing occurs circumferentially on raceway surface - Bearing defects
Peeling - Bearing defects
Peeling occurs near the shoulder of the raceway over the entire circumference - Bearing defects
Pillar fractures of pressed-steel cage - Bearing defects
Pit-shaped rust on rolling contact surface - Bearing defects
Pitting occurs on the raceway surface - Bearing defects
Pitting occurs on the rolling element surface - Bearing defects
Plastic deformation - Bearing defects
Plastic deformation - Bearing defects
Plastic deformation - Bearing defects
Pocket pillar fractures from a cast iron machined cage - Bearing defects
Point surface origin (PSO) spalling - Bearing defects
Point surface origin (PSO) spalling - Bearing defects
Polymer cage with fracture – Unacceptable - Bearing defects
Premature flaking occurs axially on the rolling surfaces - Bearing defects
Pressed-steel cage deformation - Bearing defects
Raceway discoloration, melting occurs at ball pitch intervals - Bearing defects
Raceway discoloration, melting occurs at ball pitch intervals - Bearing defects
Raceway is discolored and melted - Bearing defects
Raceway smearing at intervals corresponding to the roller spacing - Bearing defects
Re-hardened bearing steel - Bearing defects
Reverse loading - Bearing defects
Reverse loading - Bearing defects
Rib – Roller end scoring - Bearing defects
Roller end with light polishing - Acceptable - Bearing defects
Roller end with smearing – Unacceptable - Bearing defects
Rolling contact fatigue – Bearings - Bearing defects
Round shaped peeling pattern occurs on the center of the raceway surface - Bearing defects
Round shaped peeling pattern occurs on the center of the raceway surface - Bearing defects
Round shaped peeling pattern occurs on the center of the rolling surfaces - Bearing defects
Rust - Bearing defects
Rust on raceway surface at ball pitch - Bearing defects
Rust on raceway surface at roller pitch - Bearing defects
Rust on the rib face and raceway surface - Bearing defects
Scoring - Bearing defects
Scoring - Bearing defects
Scoring and peeling - Bearing defects
Scoring on large rib face of inner ring - Bearing defects
Scoring on roller end face - Bearing defects
Scoring on the face of inner ring rib - Bearing defects
Scoring on the pressedsteel cage pockets - Bearing defects
Scoring on the rib face of inner ring - Bearing defects
Scoring on the roller end face - Bearing defects
Scoring on the roller end face - Bearing defects
Scuffing - Bearing defects
Seizure - Bearing defects
Severe wear/fretting – Unacceptable - Bearing defects
Single craters - Bearing defects
Slippage tracks - Bearing defects
Small and large indentations occur over entire raceway surface - Bearing defects
Small and large indentations occur over the rolling surface - Bearing defects
Smear streaks - Bearing defects
Smearing - Bearing defects
Smearing - Bearing defects
Smearing - Bearing defects
Smearing - Bearing defects
Smearing in thrust ball bearings - Bearing defects
Smearing occurs at the center of the rolling surface - Bearing defects
Smearing occurs circumferentially on raceway surface - Bearing defects
Smearing occurs circumferentially on raceway surface - Bearing defects
Smearing occurs circumferentially on raceway surface - Bearing defects
Smearing occurs circumferentially on raceway surface - Bearing defects
Smearing of external surfaces - Bearing defects
Smearing of rollers and raceways - Bearing defects
Smearing – Left side of this inner race illustrates smearing, unacceptable - Bearing defects
Soft vs. hard ductile particles - Contamination - Bearing defects
Some defects of bearing (deformation, crack, scratch, dust) - Bearing defects
Spalling - Bearing defects
Spalling - Bearing defects
Spalling - Bearing defects
Spalls - Bearing defects
Steel cage with cracks – Unacceptable - Bearing defects
Stepped wear on the outside surface and pocket surface of a machined high-tension brass cage - Bearing defects
Stepped wear on the roller head and face - Bearing defects
Striped pattern of corrosion occurs on the raceway surface - Bearing defects
Striped pattern of corrosion occurs on the rolling surface - Bearing defects
Sub-surface initiated spalling - Bearing defects
Subsurface fatique - Bearing defects
Subsurface fatique - Bearing defects
Subsurface initiated fatigue - Bearing defects
Subsurface initiated fatigue - Bearing defects
Surface distress - Bearing defects
Surface distress = micro-scale spalling-early stage of surface initiated spalling - Bearing defects
Surface initiated spalling - Bearing defects
The defect on the inner race - Bearing defects
The defect on the outer race - Bearing defects
The formation of grooves and craters due to the passage of electric current - Bearing defects
The spalling crater is local! - Bearing defects
Thermal cracking - Bearing defects
Thermal cracks occur at large end face of roller - Bearing defects
Thermal cracks occur on the outer ring side face - Bearing defects
Tight fits - Bearing defects
Tight fits - Bearing defects
Tight fits - Bearing defects
Total bearing lockup - Bearing defects
True brinell (denting) - Bearing defects
True brinelling - Bearing defects
True brinelling - Bearing defects
True brinelling - Bearing defects
True brinelling - Bearing defects
True brinelling - Bearing defects
True vs. false brinelling - Bearing defects
Two types of rolling contact fatigue - Bearing defects
Typical fatigue effect - Bearing defects
Unacceptable tearing off of material - Bearing defects
Underfilling - Bearing defects
Vibration corrosion - false brinelling - Bearing defects
Vibration damage - Bearing defects
Water contamination - Bearing defects
Water contamination - Bearing defects
Water stains - Bearing defects
Wear - Bearing defects
Wear - Bearing defects
Wear - Bearing defects
Wear caused by abrasive particles - Bearing defects
Wear caused by inadequate lubrication - Bearing defects
Wear caused by vibration - Bearing defects
Wear caused by vibration / false brinelling – Unacceptable - Bearing defects
Wear having a wavy or concave-and-convex texture on loaded side of raceway surface - Bearing defects
Wear – Abrasive contamination - Bearing defects
Wear – Acceptable - Bearing defects
Wear – Grooving - Bearing defects
Wear – Pitting and bruising - Bearing defects
Wear – Unacceptable highly polished surface - Bearing defects
Wear – Unacceptable peeling/microspalling - Bearing defects
White etch area take-Aways - Bearing defects
White etch areas - TEM I - Bearing defects
White etch areas - TEM II - Bearing defects
White etch cracking - Bearing defects
Wiped - Bearing defects
Wiped - Bearing defects