Single-row cylindrical roller bearings
NJ18/670 Cylindrical Roller Bearing Dimensions & Specifications
NJ18/670 cylindrical roller bearing: 670 mm bore (d), 820 mm outside diameter (D), 69 mm width (B). Review the available technical values below. Matching dimensions alone do not confirm interchangeability between designations or suffixes.
Technical specifications
| Bore d | 670 mm |
|---|---|
| Outside diameter D | 820 mm |
| Width B | 69 mm |
| Mass | 84.5 kg |
| Catalogue dynamic load Cr | 1190 kN |
| Catalogue static load Cor | 2540 kN |
| Grease-lubricated speed grease | 560 rpm |
| Oil-lubricated speed oil | 670 rpm |
Mounting dimensions & additional parameters (7)
| Abutment dimension Da Da | 787 mm |
|---|---|
| Abutment dimension db db | 700 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 | 708 mm |
Fields without confirmed values are omitted. Final supply configuration and application suitability require technical confirmation.
Selection & installation
Which mounting dimensions are listed for NJ18/670?
The NJ18/670 catalogue lists Da = 787 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 NJ18/670?
The listed values for NJ18/670 are grease: 560 rpm; oil: 670 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 NJ18/670?
The catalogue reference mass for NJ18/670 is 84.5 kg. Confirm the supplied assembly and packed shipment weight separately when planning handling or transport.