Single-row cylindrical roller bearings
NJ2248M Cylindrical Roller Bearing Dimensions & Specifications
NJ2248M cylindrical roller bearing: 240 mm bore (d), 440 mm outside diameter (D), 120 mm width (B). Review the available technical values below. Matching dimensions alone do not confirm interchangeability between designations or suffixes.
Technical specifications
| Bore d | 240 mm |
|---|---|
| Outside diameter D | 440 mm |
| Width B | 120 mm |
| Mass | 86.7 kg |
| Catalogue dynamic load Cr | 1440 kN |
| Catalogue static load Cor | 2320 kN |
| Grease-lubricated speed grease | 1000 rpm |
| Oil-lubricated speed oil | 1300 rpm |
Mounting dimensions & additional parameters (10)
| Abutment dimension Da Da | 415 mm |
|---|---|
| Abutment dimension Db Db | 470 mm |
| Abutment dimension da da | 266 mm |
| Abutment dimension db db | 262 mm |
| Minimum chamfer r12 r12 | 4 mm |
| Minimum chamfer r34 r34 | 4 mm |
| Maximum fillet ra ra | 3 mm |
| Maximum fillet rb rb | 3 mm |
| Roller envelope diameter Ew Ew | 430 mm |
| Roller envelope diameter Fw Fw | 295 mm |
Fields without confirmed values are omitted. Final supply configuration and application suitability require technical confirmation.
Selection & installation
Which mounting dimensions are listed for NJ2248M?
The NJ2248M catalogue lists da = 266 mm; Da = 415 mm; ra ≤ 3 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 NJ2248M?
The listed values for NJ2248M are grease: 1000 rpm; oil: 1300 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 NJ2248M?
The catalogue reference mass for NJ2248M is 86.7 kg. Confirm the supplied assembly and packed shipment weight separately when planning handling or transport.