Single-row cylindrical roller bearings
NJ228EM Cylindrical Roller Bearing Dimensions & Specifications
NJ228EM cylindrical roller bearing: 140 mm bore (d), 250 mm outside diameter (D), 42 mm width (B). Review the available technical values below. Matching dimensions alone do not confirm interchangeability between designations or suffixes.
Technical specifications
| Bore d | 140 mm |
|---|---|
| Outside diameter D | 250 mm |
| Width B | 42 mm |
| Mass | 9.43 kg |
| Catalogue dynamic load Cr | 395 kN |
| Catalogue static load Cor | 515 kN |
| Grease-lubricated speed grease | 2400 rpm |
| Oil-lubricated speed oil | 3000 rpm |
Mounting dimensions & additional parameters (7)
| Abutment dimension Da Da | 232 mm |
|---|---|
| Abutment dimension db db | 157 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 | 169 mm |
Fields without confirmed values are omitted. Final supply configuration and application suitability require technical confirmation.
Selection & installation
Which mounting dimensions are listed for NJ228EM?
The NJ228EM catalogue lists Da = 232 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 NJ228EM?
The listed values for NJ228EM are grease: 2400 rpm; oil: 3000 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 NJ228EM?
The catalogue reference mass for NJ228EM is 9.43 kg. Confirm the supplied assembly and packed shipment weight separately when planning handling or transport.