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How to determine if a rolling contact bearing is worn?

Rolling contact bearing are an essential component in many mechanical systems. They are commonly used to accommodate both radial and axial loads, enabling rotary motion between two objects. Over time, bearings may become worn, leading to reduced efficiency, damage and possible failure of equipment.

Deep Groove Ball Bearings
Brand NameDERUNA
Model Number6206
Place of OriginChina
Precision RatingP0 P6 P5 P4 P2
Seals TypeZZ 2RS
Product nameDERUNA bearing
ApplicationAutomotive.tractor.construction Machinery.rolling Mill
MaterialChrome Steel/GCr15 Stainless Steel
FeatureLong Life
ServiceOEM Customized Services
PackageOriginal package
SampleAvailabe
Self-aligning Ball Bearing
Brand NameDERUNA
Place of OriginChina
Precision RatingP0 P6 P5 P4 P2
Product nameDERUNA bearing
Applicationprecision instruments, low noise motors, automobiles, motorcycles and general machinery, etc.
MaterialChrome Steel/GCr15 Stainless Steel
FeatureLong Life
ServiceOEM Customized Services
PackageOriginal package
SampleAvailabe
Cylindrical Roller Bearings
Bearing MaterialsGCr15,GCr15SiMn,G20Cr2Ni4A etc. or Customerized
CageSteel Cage,Cooper Cage
Quality certificateISO9001:2000
FeatureLow Noise, Low Vibration, High Precision, Long Life
SizeID 100MM – OD 2000MM
BrandDERUNA
Tolerance StandardISO492, ANSI B3.14, DIN 620/2, GB307, SB/T53419-94, SB/CO/T10-89 etc.
Precision GradeABEC(1,3,5,7,9),P0,P6,P5,P4,P2 and Equal Level
ApplicationMetallurgical Machine, Paper Making Machine, Petrochemical,Mahine, Mining Machine, Gearing Machine, Cement, Etc.
FeatureLong Life
ServiceOEM Customized Services
PackageOriginal package
SampleAvailabe
Spherical Roller Bearing
ModelCA CAK CC CCK ME MA spherical roller bearings
MaterialChrome Steel, GCR15
TypeDouble Row
Sized:3-150mm,D:9-225mm
GradeP6,P5,P4
CageSteel Cage,Cooper Cage
Used ForPaper machine, deceleration device, railway vehicle axle, rolling mill gearbox seat, rolling mill roller track, crusher, vibrating,screen, printing machine, woodworking machinery,screen, printing machine, woodworking machinery
Warranty1 year
BrandOEM or HFZZ
PackingAccording to the buyer requests for packaging
Angular Contact Ball Bearing
BrandDERUNA
Quality Standard:ISO9001:2008
Bearing No.25TAC 47B
Precision:P0, P2, P4, P5, P6
Vibration Level:V1, V2, V3, V4
Clearance:C2, C3, C4, C5
Hardness:59-63 HRC
Seal TypesOpen or Sealed
Material:Gcr15, Gcr15SiMn, Chrome steel, ceramic, stainless steel
Cage materialSteel cage, bakelite, nylon, brass, PEEK
ApplicationAngular Contact Ball Bearing are widely used in Machine tool spindles, high frequency motors, gas turbines, centrifugal separator, small car front wheels, differential pinion shaft, roots blowers, air compressors, transmissions, printing machine motors, water pump, oil pump, cutting machines, reducers, prospecting machines, polishing machines, diesel engines, textile machinery, steel mills etc.
Tapered Roller Bearings
TypeROLLER-Taper Roller Bearing
Model Number30207 33106 33107 33108 33109 33110J2/Q
StructureTaper
MaterialChrome Steel
RetainerStamping Steel Plate
Applicable IndustriesBuilding Material Shops, Manufacturing Plant, Machinery Repair Shops, Printing Shops, Construction works , Energy & Mining etc..
Bore Size50-75 mm
Precision RatingP0 P6 P5 P4 P2
Seals TypeOPEN
Number of RowSingle & Double & Four Row
ShapeRound
CustomizableYes
Thrust Ball Bearings
MaterialChrome steel or Ceramic as customer required
Delivery Time7-35days
Trade termsT/T, L/C, Western Union, Paypal
MarketGlobal, but Asia, North America, South America, Middle East, Part of Europe are our main markets presently.
PackingAccording to the buyer requests for packaging
Applicable IndustriesMachinery Repair Shops, Printing Shops, Construction works , Energy & Mining
Spherical Trust Roller Bearing
Model29436 29436 E
MaterialChrome Steel, GCR15
TypeDouble Row
Size180x360x109 mm
GradePO,P6,P5,P4,P2
CageSteel Cage,Cooper Cage
Used ForPaper machine, deceleration device, railway vehicle axle, rolling mill gearbox seat, rolling mill roller track, crusher, vibrating,screen, printing machine, woodworking machinery.
Warranty1 year
BrandOEM or HFZZ
PackingAccording to the buyer requests for packaging
pillow block bearing
BrandFollow Customer’s Request
Model numberucp208-24
MaterialChrome Steel/GCr15
Number of rowSingle Row
PrecisionP0 P6 P5 P4 P2
STOCKGreat Supplying Ability
Warranty50000km or One year
Precision ratingABCE-1 ABCE-3 ABCE-5 ABCE-7
VibrationV1 V2 V3 V4
ClearanceC0 C2 C3 C4 C5
Delivery Detail2-5 days upon receipt of deposit or according to your requirements
ShippingExpress ,AIR ,Sea Shipping
Needle Roller Bearing
Modeloem
MaterialChrome Steel, GCR15
Size40*65*22mm
PrecisionPO,P6,P5,P4,P2
CageSteel Cage,copper Cage,nylon Cage
Used ForGearboxes of machine tools, Automobiles, Motorcycles, Textile machinery, printing machinery,
 forage machinery, agricultural machinery, numerical control equipment
Warranty1 year
BrandOEM
PackingAccording to the buyer requests for packaging
Shipping:Express: DHL Fedex EMS /By Sea
Bearing Advantage:1).Excellent and high quality control
2).Prompt delivery
3).Competitive price
4).Small order accepted
5).Customers’ drawing or samples accepted
6).OEM service

Rolling Contact Bearing-Visual Inspection

One of the most straightforward methods of determining whether a rolling contact bearing is worn is to simply examine it. This can be done during regular maintenance or when troubleshooting equipment. A visual inspection may reveal signs of wear such as discoloration, pitting, spalling, or localized abrasion. These signs can point to either overload, inadequate lubrication, or an excessive amount of contaminants in the bearing.

Rolling Contact Bearing-Measurement and Testing

More sophisticated methods for determining the level of wear on a bearing involve testing the bearing for clearance and vibration analysis. One of the most popular and straightforward methods is to use a dial indicator. A dial indicator can be used to measure the radial clearance of the bearing. An increase in clearance is an indicator of wear. Vibration analysis will also provide information about the level of wear. This involves analyzing the vibration frequency of the bearing for changes in pitch and intensity.

Rolling Contact Bearing-Types of Wear

There are many types of wear that can occur in a rolling contact bearing. Here are a few of the most common types of wear:

  • Adhesive Wear: This is the most common type of wear in rolling contact bearing. It can occur when there is a lack of lubrication between the rolling elements and the raceway. The rolling elements then contact the surface at high speeds under high pressure, causing the surface to degrade due to friction.
    Abrasive Wear: This type of wear occurs when the surface of the rolling elements becomes rough or abrasive, resulting in friction between the rolling elements and the raceway.
  • Fatigue Wear: This wear occurs from the repeated stress that comes with the load cycle of a bearing. It is a progressive type of wear that can lead to cracking and spalling of the surface of the bearing.
  • Preventing Wear
    Preventing bearing wear is key to extending the lifespan of machinery. Here are some tips:
  1. Lubrication: Adequate lubrication is critical to the functioning and lifespan of bearings. Proper procedures and schedules need to be followed, and attention should be paid to the type of lubricant used.
  2. Installation: Incorrectly installed bearings can create problems such as misalignment, which can lead to wear. Proper installation is crucial for the lifespan of the bearing.
  3. Clean Environment: Contaminants in the environment can lead to premature wear of bearings. Machinery should be kept clean and free from dust, metal chips, and other debris.
  4. Maintenance: Regular maintenance of machinery can help to identify potential problems early, allowing for corrective action to be taken before significant wear occurs.

Conclusion:

Determining whether a rolling contact bearing is worn can be done through a visual inspection or more sophisticated testing methods. Understanding the types of wear and how to prevent it can help to extend the lifespan of equipment and avoid unplanned downtime. Proper installation, adequate lubrication, and regular maintenance are key to preventing premature wear of bearings.

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