Read this exact catalogue record
NTN NU318 is recorded in the manufacturer catalogue as single row cylindrical roller bearings. Its listed boundary dimensions are 90×190×43 mm: bore d × outside diameter D × bearing/inner-ring width B.
Reference:NTN Europe public product catalogue; source checked 2026-10-01.
How to use the parameters
- Use the complete NTN marking when comparing this record. The base number alone does not establish the same closure, clearance, cage, load rating or speed across brands.
- Dynamic and static load ratings are catalogue reference values, not a permitted working load for every installation. Grease and oil speed entries describe separate lubrication conditions; do not treat the higher value as a general operating limit.
- Mounting dimensions such as shoulder diameters and maximum fillet radii are not the bearing boundary dimensions. Unknown precision, material, lubricant grade and application fitment are not inferred from similar products.
This is an independent technical reference, not an official drawing, a complete current catalogue or an approval for a vehicle or machine.
Technical data
Product specifications
Metric and imperial values are paired where the manufacturer provides both. Expand a section to review its parameters.
Core specifications12 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Variant / construction | Single row cylindrical roller bearings | |
| Bore diameter | d | 90 mm |
| Outside diameter | D | 190 mm |
| Width | B | 43 mm |
| Basic dynamic load rating | C | 266 kN |
| Basic static load rating | C0 | 265 kN |
| Fatigue load limit | Pu | 29.3 kN |
| Mass | ≈m | 5.3 kg |
| Internal clearance | CN | |
| Cage | pressed steel cage | |
| Minimum operating temperature | Tmin | -40 °C |
| Maximum operating temperature | Tmax | 120 °C |
Product characteristics2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Catalogue construction | Single row cylindrical roller bearing, floating, separable, pressed steel cage | |
| Cage construction | pressed steel cage |
Mounting dimensions6 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Min shoulder diameter IR | da min | 103 mm |
| Small face shoulder max diameter | da max | 111 mm |
| Min inner ring GO diameter | db min | 117 mm |
| Max shoulder diameter OR | Da max | 177 mm |
| Max fillet radius | ra max | 2.5 mm |
| Max fillet radius | r1a | 2.5 mm |
Dimensions and properties9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Internal diameter | d | 90 mm |
| External diameter | D | 190 mm |
| Bearing/Inner ring width | B | 43 mm |
| Upper roller diameter | E | 165 mm |
| Under roller diameter | F | 115 mm |
| Min fillet radius | rs | 3 mm |
| Min fillet radius | r1s | 3 mm |
| Radial clearance class | CN | |
| Mass | 5.3 kg |
Performance7 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Dynamic load | C | 266 kN |
| Static load | C0 | 265 kN |
| Fatigue limit load | Cu | 29.3 kN |
| Oil lubrication limit speed | N lim | 4300 r/min |
| Grease lubrication limit speed | N lim | 3700 r/min |
| Min operating temperature | Tmin | -40 °C |
| Max operating temperature | Tmax | 120 °C |