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bearing clearances
Why knowing bearing clearances has become so important
2023-04-12
NSK Bearing Cross Reference
NSK Bearing Cross Reference
2023-04-17

Questions about plastic bearings

  • Since engineering plastics have the characteristics of excellent self-lubrication, wear resistance, low friction and special anti-seizing properties, they can work normally even under poor lubrication conditions, so they are ideal for bearing materials.
  • As the name implies, the material used for the bearing is: engineering plastic material, the inner ring of the bearing, the outer ring of the bearing, and the cage are all engineering plastic materials, and the rolling elements of the bearing include glass balls, plastic balls, or stainless steel balls.
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

Classification of plastic bearing materials

Classification of plastic bearing materials
Classification Introduction Features
POM/PA plastic bearings (precision plastic bearings) 1. POM and PA materials have good mechanical strength and wear resistance, and are suitable for making relatively precise plastic bearings. 2. Its good self-lubricating performance and low friction coefficient can be applied to precision and high-speed movements on the basis of maintaining the traditional advantages of plastic bearings. Among them, POM plastic bearings are the most widely used of all plastic bearings. 3. Generally, the inner and outer rings are made of POM or PA, the cage is made of glass fiber reinforced nylon 66 (GRPA66-25), and the rolling body is made of glass balls, stainless steel balls or ceramic balls. This kind of bearing performs well in alkaline environment. But not suitable for operation in acidic corrosive environment. 1. High rigidity, high hardness, high impact strength even at low temperature; 2. Excellent elasticity, good creep resistance 3. High thermal stability and very good dimensional stability; 4. Good sliding performance and wear resistance; 5. Physiologically inert, suitable for contact with food. 6. High thermal stability and very good dimensional stability;
HDPE/PP/UPE/(UHMW-PE) plastic bearings (acid and alkali resistant plastic bearings) 1. HKPE, PP, and UPE materials have been proven to be used in relatively weak acid-base cross environments (30% CUC12 solution and 30% NAOH solution test OK), so they are suitable for most acids/alkali/salt/solutions/oil/ Gas and sea water corrosion environment, with the oil-free self-lubricating properties of ordinary plastic bearings, anti-magnetic and electrical insulation and other properties 2. The mechanical properties are low and easy to deform, so it is not suitable for large loads and high speeds. In comparison, UPE materials have better strength, low friction characteristics and low temperature application characteristics (lowest to -150°C) 3. Generally, the inner and outer rings are made of HDPE, PP or UPE, the cage is made of HDPE, PP or UPE, and the rolling elements are made of glass balls, stainless steel balls or ceramic balls. 1. Good corrosion resistance, able to withstand various corrosive media and organic media within a certain temperature and concentration range 2. High mechanical strength, can maintain high toughness at liquid nitrogen temperature (-196°C) 3. Good self-lubrication, high wear resistance 4. Strong anti-adhesion ability 5. Very low water absorption, excellent electrical insulation 6. Good resistance to high energy radiation
Introduction to PEEK/PI plastic bearings (high temperature resistant plastic bearings) 1. As an emerging engineering plastic material, PEEK/PI has been proven to be the best in mechanical strength, dimensional stability and high temperature resistance among all known engineering plastics. During the period, the long-term use temperature of PEEK reaches 260°C, and the long-term use temperature of PI reaches 300°C. 2. It has excellent corrosion resistance and can still operate freely in medium-strength acid-base corrosion environments, so it is generally used to make bearings that need to operate precisely in harsh environments 3. The disadvantage is that the cost of the material itself is high. Generally, the inner and outer rings are made of PEEK or PI, the cage is made of PTFE, PEEK or PI, and the rolling elements are made of ZrO2 or Si3N4 ceramic balls.
PTFE/PVDF plastic bearings (corrosion-resistant plastic bearings) 1. As the most typical varieties of fluoroplastics, PTFE and PVDF have the best corrosion resistance, among which PTFE has the best corrosion resistance among all known engineering plastics, and can be used in all concentrated acids and alkalis , including HF and oleum nitric acid (above 98%), etc. 2. It has good high temperature performance, PTFE is used at 180°C, and PVDF is used at 150°C, but the mechanical stress of PTFE material is extremely low, the dimensional stability is poor, and the temperature deformation is large 3. In comparison, PVDF has better overall performance. Generally, the inner and outer rings are made of PTFE or PVDF, the cage is made of PTFE or PVDF, and the rolling elements are made of glass balls or ceramic balls.
Plastic Bearings

Code of plastic bearing

For engineering plastic bearings, the type of material used in the bearing is added to the suffix of the plastic bearing model. For example, 6204-2RS means bearing steel 6204 with rubber seal ring, and 6204-2RS PEEK means: PEEK plastic bearing 6204 with rubber seal ring.

Advantages of plastic bearings

  • The whole plastic bearing is made of lubricating material and has a long service life.
  • Plastic bearings will not rust and are corrosion-resistant during use, while metal bearings are prone to rust and cannot be used in chemical fluids.
  • Plastic bearings are lighter than metal, which is more suitable for modern lightweight design trends.
  • The manufacturing cost of plastic bearings is lower than that of metals. Plastic bearings are processed by injection molding and are more suitable for mass production.
  • Plastic bearings have no noise during operation and have a certain vibration-absorbing function.
  • Plastic bearings are suitable for high and low temperature work -200 ~ +350 degrees.

Application fields of plastic bearings

  1. Medical equipment, cryogenic engineering, optical instruments
  2. food processing machinery
  3. Work in petroleum, chemical industry, light textile industry, machinery, food, inflammable, explosive, strong corrosion, vacuum, electrical insulation, non-magnetic, dry friction and other special working conditions

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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