Single-row cylindrical roller bearings
NJ424M Cylindrical Roller Bearing Dimensions & Specifications
NJ424M cylindrical roller bearing: 120 mm bore (d), 310 mm outside diameter (D), 72 mm width (B). Review the available technical values below. Matching dimensions alone do not confirm interchangeability between designations or suffixes.
Technical specifications
| Bore d | 120 mm |
|---|---|
| Outside diameter D | 310 mm |
| Width B | 72 mm |
| Mass | 29.7 kg |
| Catalogue dynamic load Cr | 710 kN |
| Catalogue static load Cor | 920 kN |
| Grease-lubricated speed grease | 1900 rpm |
| Oil-lubricated speed oil | 2400 rpm |
Mounting dimensions & additional parameters (7)
| Abutment dimension Da Da | 290 mm |
|---|---|
| Abutment dimension db db | 146 mm |
| Minimum chamfer r12 r12 | 5 mm |
| Minimum chamfer r34 r34 | 5 mm |
| Maximum fillet ra ra | 4 mm |
| Maximum fillet rb rb | 4 mm |
| Roller envelope diameter Fw Fw | 170 mm |
Fields without confirmed values are omitted. Final supply configuration and application suitability require technical confirmation.
Selection & installation
Which mounting dimensions are listed for NJ424M?
The NJ424M catalogue lists Da = 290 mm; ra ≤ 4 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 NJ424M?
The listed values for NJ424M 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 NJ424M?
The catalogue reference mass for NJ424M is 29.7 kg. Confirm the supplied assembly and packed shipment weight separately when planning handling or transport.