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NTN bearings are widely used in various industries across the world for their high durability and reliability. However, understanding NTN bearing tolerances can be essential for achieving optimal performance while using them. In this article, we will take a closer look at the different types of NTN bearing tolerances, how they are measured, and how they impact the performance of the bearings.
| Deep Groove Ball Bearings | |
| Brand Name | DERUNA |
| Model Number | 6206 |
| Place of Origin | China |
| Precision Rating | P0 P6 P5 P4 P2 |
| Seals Type | ZZ 2RS |
| Product name | DERUNA bearing |
| Application | Automotive.tractor.construction Machinery.rolling Mill |
| Material | Chrome Steel/GCr15 Stainless Steel |
| Feature | Long Life |
| Service | OEM Customized Services |
| Package | Original package |
| Sample | Availabe |
| Self-aligning Ball Bearing | |
| Brand Name | DERUNA |
| Place of Origin | China |
| Precision Rating | P0 P6 P5 P4 P2 |
| Product name | DERUNA bearing |
| Application | precision instruments, low noise motors, automobiles, motorcycles and general machinery, etc. |
| Material | Chrome Steel/GCr15 Stainless Steel |
| Feature | Long Life |
| Service | OEM Customized Services |
| Package | Original package |
| Sample | Availabe |
| Cylindrical Roller Bearings | |
| Bearing Materials | GCr15,GCr15SiMn,G20Cr2Ni4A etc. or Customerized |
| Cage | Steel Cage,Cooper Cage |
| Quality certificate | ISO9001:2000 |
| Feature | Low Noise, Low Vibration, High Precision, Long Life |
| Size | ID 100MM – OD 2000MM |
| Brand | DERUNA |
| Tolerance Standard | ISO492, ANSI B3.14, DIN 620/2, GB307, SB/T53419-94, SB/CO/T10-89 etc. |
| Precision Grade | ABEC(1,3,5,7,9),P0,P6,P5,P4,P2 and Equal Level |
| Application | Metallurgical Machine, Paper Making Machine, Petrochemical,Mahine, Mining Machine, Gearing Machine, Cement, Etc. |
| Feature | Long Life |
| Service | OEM Customized Services |
| Package | Original package |
| Sample | Availabe |
| Spherical Roller Bearing | |
| Model | CA CAK CC CCK ME MA spherical roller bearings |
| Material | Chrome Steel, GCR15 |
| Type | Double Row |
| Size | d:3-150mm,D:9-225mm |
| Grade | P6,P5,P4 |
| Cage | Steel Cage,Cooper Cage |
| Used For | Paper 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 |
| Warranty | 1 year |
| Brand | OEM or HFZZ |
| Packing | According to the buyer requests for packaging |
| Angular Contact Ball Bearing | |
| Brand | DERUNA |
| 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 Types | Open or Sealed |
| Material: | Gcr15, Gcr15SiMn, Chrome steel, ceramic, stainless steel |
| Cage material | Steel cage, bakelite, nylon, brass, PEEK |
| Application | Angular 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 | |
| Type | ROLLER-Taper Roller Bearing |
| Model Number | 30207 33106 33107 33108 33109 33110J2/Q |
| Structure | Taper |
| Material | Chrome Steel |
| Retainer | Stamping Steel Plate |
| Applicable Industries | Building Material Shops, Manufacturing Plant, Machinery Repair Shops, Printing Shops, Construction works , Energy & Mining etc.. |
| Bore Size | 50-75 mm |
| Precision Rating | P0 P6 P5 P4 P2 |
| Seals Type | OPEN |
| Number of Row | Single & Double & Four Row |
| Shape | Round |
| Customizable | Yes |
| Thrust Ball Bearings | |
| Material | Chrome steel or Ceramic as customer required |
| Delivery Time | 7-35days |
| Trade terms | T/T, L/C, Western Union, Paypal |
| Market | Global, but Asia, North America, South America, Middle East, Part of Europe are our main markets presently. |
| Packing | According to the buyer requests for packaging |
| Applicable Industries | Machinery Repair Shops, Printing Shops, Construction works , Energy & Mining |
| Spherical Trust Roller Bearing | |
| Model | 29436 29436 E |
| Material | Chrome Steel, GCR15 |
| Type | Double Row |
| Size | 180x360x109 mm |
| Grade | PO,P6,P5,P4,P2 |
| Cage | Steel Cage,Cooper Cage |
| Used For | Paper machine, deceleration device, railway vehicle axle, rolling mill gearbox seat, rolling mill roller track, crusher, vibrating,screen, printing machine, woodworking machinery. |
| Warranty | 1 year |
| Brand | OEM or HFZZ |
| Packing | According to the buyer requests for packaging |
| pillow block bearing | |
| Brand | Follow Customer’s Request |
| Model number | ucp208-24 |
| Material | Chrome Steel/GCr15 |
| Number of row | Single Row |
| Precision | P0 P6 P5 P4 P2 |
| STOCK | Great Supplying Ability |
| Warranty | 50000km or One year |
| Precision rating | ABCE-1 ABCE-3 ABCE-5 ABCE-7 |
| Vibration | V1 V2 V3 V4 |
| Clearance | C0 C2 C3 C4 C5 |
| Delivery Detail | 2-5 days upon receipt of deposit or according to your requirements |
| Shipping | Express ,AIR ,Sea Shipping |
| Needle Roller Bearing | |
| Model | oem |
| Material | Chrome Steel, GCR15 |
| Size | 40*65*22mm |
| Precision | PO,P6,P5,P4,P2 |
| Cage | Steel Cage,copper Cage,nylon Cage |
| Used For | Gearboxes of machine tools, Automobiles, Motorcycles, Textile machinery, printing machinery, |
| forage machinery, agricultural machinery, numerical control equipment | |
| Warranty | 1 year |
| Brand | OEM |
| Packing | According 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 | |
NTN bearing tolerances are classified into two major categories: dimensional and running accuracy. The dimensional accuracy of the bearing is a measure of the size, geometry, and position of its key components. This includes measurements such as the bore diameter, outer diameter, width, and overall running clearance. On the other hand, the running accuracy of NTN bearings refers to their ability to rotate smoothly at high speeds without any significant wobbling or vibration.
| Standard | Standard | Tolerance Class | Bearing Types | ||||
| Japanese Industrial Standard | JIS B 1514 | Class 0 Class 6X | Class 6 | Class 5 | Class 4 | Class 2 | All types |
| International Organization for Standardization | ISO 492 | Normal class | Class 6 | Class 5 | Class 4 | Class 2 | Radial bearings |
| Class 6X | |||||||
| ISO 199 | Normal class | Class 6 | Class 5 | Class 4 | — | Thrust ball bearings | |
| ISO 578 | Class 4 | — | Class 3 | Class 0 | Class 00 | Tapered roller | |
| bearings (Inch series) | |||||||
| ISO 1224 | — | — | Class 5A | Class 4A | — | Precision instrument | |
| bearings | |||||||
| Deutsches Institut | DIN 620 | P0 | P6 | P5 | P4 | P2 | All types |
| fur Normung | |||||||
| American National Standards Institute (ANSI) | ANSI/AFBMA Std. 201) | ABEC-1 RBEC-1 | ABEC-3 RBEC-3 | ABEC-5 RBEC-5 | ABEC-7 | ABEC-9 | Radial bearings (Except tapered |
| Anti-Friction Bearing Manufacturers (AFBMA) | roller bearings) | ||||||
| ANSI/AFBMA | Class K | Class N | Class C | Class B | Class A | Tapered roller bear- | |
| Std. 19.1 | ings (Metric series) | ||||||
| ANSI B 3.19 | Class 4 | Class 2 | Class 3 | Class 0 | Class 00 | Tapered roller | |
| AFBMA Std. 19 | bearings (Inch series) | ||||||
| ANSI/AFBMA Std. 12.1 | Class 3P | Class 5P Class 5T | Class 7P Class 7T | Class 9P | Precision instrument | ||
| ball bearings (Metric series) | |||||||
| ANSI/AFBMA Sts. 12.2 | — | Class 3P | Class 5P Class 5T | Class 7P Class 7T | Class 9P | Precision instrument ball bearings | |
| (Inch series) | |||||||
1) “ABEC” is applied for ball bearings and “RBEC” for roller bearings.
Notes: 1. JIS B 1514, ISO 492 and 199, and DIN 620 have the same specification level.
2. The tolerance and allowance of JIS B 1514 are a little different from those of AFBMA standards.
| Bearing Type | standard | Applicable tolerance | |||||
| Deep groove ball bearing | ISO 492 | class 0 | class 6 | class 5 | class 4 | class 2 | |
| Angular contact ball bearings | ISO 492 | class 0 | class 6 | class 5 | class 4 | class 2 | |
| Self-aligning ball bearings | ISO 492 | class 0 | — | — | — | — | |
| Cylindrical roller bearings | ISO 492 | class 0 | class 6 | class 5 | class 4 | class 2 | |
| Needle roller bearings | ISO 492 | class 0 | class 6 | class 5 | class 4 | — | |
| Spherical roller bearings | ISO 492 | class 0 | — | — | — | — | |
| Tapered roller bearings | metric | ISO 492 | class 0,6X | class 6 | class 5 | class 4 | — |
| inch | AFBMA Std. 19 | class 4 | class 2 | class 3 | class 0 | class 00 | |
| J series | ANSI/AFBMA Std.19.1 | class K | class N | class C | class B | class A | |
| Thrust ball bearings | ISO 199 | class 0 | class 6 | class 5 | class 4 | — | |
| Thrust roller bearings | NTN standard | class 0 | class 6 | class 5 | class 4 | — | |
| Spherical roller thrust bearings | ISO 199 | class 0 | — | — | — | — | |
| Double direction angular contact thrust ball bearings | NTN standard | — | — | class 5 | class 4 | — | |
The following is a list of codes and symbols used in the bearing
tolerance standards tables. However, in some cases the code
or symbol definition has been abbreviated.
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. Contact us today to learn more about our products and services.