NSK Deep Groove Ball Bearings
NSK Deep Groove Ball Bearings Size Range And Types
2023-04-11
Plastic Bearings
Questions about plastic bearings
2023-04-13

Why knowing bearing clearances has become so important

Bearing clearances is also called bearing clearance. When the bearing is not installed in the shaft or bearing housing, it will fix its inner or outer ring, and then move the side to make radial or axial movement when it is not fixed.

NSK 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
  • Why adjust the bearing clearance?
  • Excessive or small bearing clearance can reduce the working life of bearings and even the stability of the entire equipment operation.

Understanding the importance of bearing clearances

bearing clearances
  • The size of the working clearance has an impact on the rolling fatigue life, temperature rise, noise, vibration and other performance of the bearing.
  • The measurement of bearing clearance is generally to apply a specified measurement load to the bearing to obtain a stable measurement value. Therefore, the measured value obtained from the actual clearance (referred to as theoretical clearance) is relatively large, which increases the amount of elastic deformation caused by the measured load. For roller bearings, due to the small elastic deformation, it can be ignored.
  • The internal clearance of the bearing before the theoretical clearance generally indicates the installation.
  • When the bearing is installed on the shaft or housing, the theoretical clearance minus the clearance caused by the interference of the expansion or contraction of the retaining ring is called “installation clearance”. The temperature difference inside the bearing caused by the dimensional change after adding and subtracting the installation clearance is called “effective clearance”.
  • When the bearing is installed, there is a mechanical placement clearance for carrying a specific load, that is, sufficient clearance plus the amount produced by the elastic deformation of the bearing load, which is called “working clearance”.
  • When the working clearance is slightly negative, the fatigue life of the bearing is the longest, but with the increase of the negative clearance, the fatigue life decreases obviously. Therefore, the selection of bearing clearance generally recommends that the working clearance is zero or slightly larger. The working clearance must also be analyzed in detail according to the usage.

Bearing clearances standard quick reference table

We are one of the largest suppliers of bearings in China. Providing the same products at the best price is the long term motivation and driving force for our business development. If you need, please contact us.

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