Single-row cylindrical roller bearings
NU256M Cylindrical Roller Bearing Dimensions & Specifications
NU256M cylindrical roller bearing: 280 mm bore (d), 500 mm outside diameter (D), 80 mm width (B). Review the available technical values below. Matching dimensions alone do not confirm interchangeability between designations or suffixes.
Technical specifications
| Bore d | 280 mm |
|---|---|
| Outside diameter D | 500 mm |
| Width B | 80 mm |
| Mass | 70.7 kg |
| Catalogue dynamic load Cr | 1140 kN |
| Catalogue static load Cor | 1680 kN |
| Grease-lubricated speed grease | 1000 rpm |
| Oil-lubricated speed oil | 1300 rpm |
Mounting dimensions & additional parameters (7)
| Abutment dimension Da Da | 470 mm |
|---|---|
| Abutment dimension db db | 306 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 | 340 mm |
Fields without confirmed values are omitted. Final supply configuration and application suitability require technical confirmation.
Selection & installation
Which mounting dimensions are listed for NU256M?
The NU256M catalogue lists Da = 470 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 NU256M?
The listed values for NU256M 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 NU256M?
The catalogue reference mass for NU256M is 70.7 kg. Confirm the supplied assembly and packed shipment weight separately when planning handling or transport.