Read this exact catalogue record
NTN NU234 is recorded in the manufacturer catalogue as single row cylindrical roller bearings. Its listed boundary dimensions are 170×310×52 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 | 170 mm |
| Outside diameter | D | 310 mm |
| Width | B | 52 mm |
| Basic dynamic load rating | C | 530 kN |
| Basic static load rating | C0 | 635 kN |
| Fatigue load limit | Pu | 59.5 kN |
| Mass | ≈m | 17 kg |
| Internal clearance | CN | |
| Cage | brass 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, brass cage | |
| Cage construction | brass cage |
Mounting dimensions6 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Min shoulder diameter IR | da min | 186 mm |
| Small face shoulder max diameter | da max | 204 mm |
| Min inner ring GO diameter | db min | 211 mm |
| Max shoulder diameter OR | Da max | 294 mm |
| Max fillet radius | ra max | 3 mm |
| Max fillet radius | r1a | 3 mm |
Dimensions and properties9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Internal diameter | d | 170 mm |
| External diameter | D | 310 mm |
| Bearing/Inner ring width | B | 52 mm |
| Upper roller diameter | E | 272 mm |
| Under roller diameter | F | 208 mm |
| Min fillet radius | rs | 4 mm |
| Min fillet radius | r1s | 4 mm |
| Radial clearance class | CN | |
| Mass | 17 kg |
Performance7 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Dynamic load | C | 530 kN |
| Static load | C0 | 635 kN |
| Fatigue limit load | Cu | 59.5 kN |
| Oil lubrication limit speed | N lim | 2500 r/min |
| Grease lubrication limit speed | N lim | 2200 r/min |
| Min operating temperature | Tmin | -40 °C |
| Max operating temperature | Tmax | 120 °C |