Single-row cylindrical roller bearings
NJ234EM Cylindrical Roller Bearing Dimensions & Specifications
NJ234EM cylindrical roller bearing: 170 mm bore (d), 310 mm outside diameter (D), 52 mm width (B). Review the available technical values below. Matching dimensions alone do not confirm interchangeability between designations or suffixes.
Technical specifications
| Bore d | 170 mm |
|---|---|
| Outside diameter D | 310 mm |
| Width B | 52 mm |
| Mass | 18.1 kg |
| Catalogue dynamic load Cr | 475 kN |
| Catalogue static load Cor | 635 kN |
| Grease-lubricated speed grease | 1800 rpm |
| Oil-lubricated speed oil | 2200 rpm |
Mounting dimensions & additional parameters (7)
| Abutment dimension Da Da | 288 mm |
|---|---|
| Abutment dimension db db | 190 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 | 208 mm |
Fields without confirmed values are omitted. Final supply configuration and application suitability require technical confirmation.
Selection & installation
Which mounting dimensions are listed for NJ234EM?
The NJ234EM catalogue lists Da = 288 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 NJ234EM?
The listed values for NJ234EM are grease: 1800 rpm; oil: 2200 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 NJ234EM?
The catalogue reference mass for NJ234EM is 18.1 kg. Confirm the supplied assembly and packed shipment weight separately when planning handling or transport.