Single-row cylindrical roller bearings
NJ238EM Cylindrical Roller Bearing Dimensions & Specifications
NJ238EM cylindrical roller bearing: 190 mm bore (d), 340 mm outside diameter (D), 55 mm width (B). Review the available technical values below. Matching dimensions alone do not confirm interchangeability between designations or suffixes.
Technical specifications
| Bore d | 190 mm |
|---|---|
| Outside diameter D | 340 mm |
| Width B | 55 mm |
| Mass | 22.0 kg |
| Catalogue dynamic load Cr | 695 kN |
| Catalogue static load Cor | 955 kN |
| Grease-lubricated speed grease | 1600 rpm |
| Oil-lubricated speed oil | 1900 rpm |
Mounting dimensions & additional parameters (7)
| Abutment dimension Da Da | 317 mm |
|---|---|
| Abutment dimension db db | 211 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 Fw Fw | 230 mm |
Fields without confirmed values are omitted. Final supply configuration and application suitability require technical confirmation.
Selection & installation
Which mounting dimensions are listed for NJ238EM?
The NJ238EM catalogue lists Da = 317 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 NJ238EM?
The listed values for NJ238EM are grease: 1600 rpm; oil: 1900 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 NJ238EM?
The catalogue reference mass for NJ238EM is 22.0 kg. Confirm the supplied assembly and packed shipment weight separately when planning handling or transport.