Single-row cylindrical roller bearings
NU20/630 Cylindrical Roller Bearing Dimensions & Specifications
NU20/630 cylindrical roller bearing: 630 mm bore (d), 920 mm outside diameter (D), 170 mm width (B). Review the available technical values below. Matching dimensions alone do not confirm interchangeability between designations or suffixes.
Technical specifications
| Bore d | 630 mm |
|---|---|
| Outside diameter D | 920 mm |
| Width B | 170 mm |
| Mass | 285 kg |
| Catalogue dynamic load Cr | 4500 kN |
| Catalogue static load Cor | 9000 kN |
| Grease-lubricated speed grease | 480 rpm |
| Oil-lubricated speed oil | 560 rpm |
Mounting dimensions & additional parameters (7)
| Abutment dimension Da Da | 887 mm |
|---|---|
| Abutment dimension db db | 666 mm |
| Minimum chamfer r12 r12 | 7.5 mm |
| Minimum chamfer r34 r34 | 7.5 mm |
| Maximum fillet ra ra | 6 mm |
| Maximum fillet rb rb | 6 mm |
| Roller envelope diameter Fw Fw | 699 mm |
Fields without confirmed values are omitted. Final supply configuration and application suitability require technical confirmation.
Selection & installation
Which mounting dimensions are listed for NU20/630?
The NU20/630 catalogue lists Da = 887 mm; ra ≤ 6 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 NU20/630?
The listed values for NU20/630 are grease: 480 rpm; oil: 560 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 NU20/630?
The catalogue reference mass for NU20/630 is 285 kg. Confirm the supplied assembly and packed shipment weight separately when planning handling or transport.