Single-row cylindrical roller bearings
NJ230EM Cylindrical Roller Bearing Dimensions & Specifications
NJ230EM cylindrical roller bearing: 150 mm bore (d), 270 mm outside diameter (D), 45 mm width (B). Review the available technical values below. Matching dimensions alone do not confirm interchangeability between designations or suffixes.
Technical specifications
| Bore d | 150 mm |
|---|---|
| Outside diameter D | 270 mm |
| Width B | 45 mm |
| Mass | 12.7 kg |
| Catalogue dynamic load Cr | 450 kN |
| Catalogue static load Cor | 595 kN |
| Grease-lubricated speed grease | 1900 rpm |
| Oil-lubricated speed oil | 2400 rpm |
Mounting dimensions & additional parameters (7)
| Abutment dimension Da Da | 251 mm |
|---|---|
| Abutment dimension db db | 167 mm |
| Minimum chamfer r12 r12 | 3 mm |
| Minimum chamfer r34 r34 | 3 mm |
| Maximum fillet ra ra | 2.5 mm |
| Maximum fillet rb rb | 2.5 mm |
| Roller envelope diameter Fw Fw | 182 mm |
Fields without confirmed values are omitted. Final supply configuration and application suitability require technical confirmation.
Selection & installation
Which mounting dimensions are listed for NJ230EM?
The NJ230EM catalogue lists Da = 251 mm; ra ≤ 2.5 mm. Check these symbols against the bearing drawing and the shaft/housing shoulders; they are not shaft or housing fit tolerances.
What speed values are available for NJ230EM?
The listed values for NJ230EM are grease: 1900 rpm; oil: 2400 rpm. These catalogue references do not determine a safe operating speed on their own. Confirm load, clearance, lubrication and heat conditions for the application.
What is the reference mass of NJ230EM?
The catalogue reference mass for NJ230EM is 12.7 kg. Confirm the supplied assembly and packed shipment weight separately when planning handling or transport.