Single-row cylindrical roller bearings
NU3868M Cylindrical Roller Bearing Dimensions & Specifications
NU3868M cylindrical roller bearing: 340 mm bore (d), 420 mm outside diameter (D), 60 mm width (B). Review the available technical values below. Matching dimensions alone do not confirm interchangeability between designations or suffixes.
Technical specifications
| Bore d | 340 mm |
|---|---|
| Outside diameter D | 420 mm |
| Width B | 60 mm |
| Mass | 18.6 kg |
| Catalogue dynamic load Cr | 515 kN |
| Catalogue static load Cor | 1250 kN |
| Grease-lubricated speed grease | 1200 rpm |
| Oil-lubricated speed oil | 1500 rpm |
Mounting dimensions & additional parameters (7)
| Abutment dimension Da Da | 400 mm |
|---|---|
| Abutment dimension db db | 359 mm |
| Minimum chamfer r12 r12 | 2.1 mm |
| Minimum chamfer r34 r34 | 2.1 mm |
| Maximum fillet ra ra | 2 mm |
| Maximum fillet rb rb | 2 mm |
| Roller envelope diameter Fw Fw | 362 mm |
Fields without confirmed values are omitted. Final supply configuration and application suitability require technical confirmation.
Selection & installation
Which mounting dimensions are listed for NU3868M?
The NU3868M catalogue lists Da = 400 mm; ra ≤ 2 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 NU3868M?
The listed values for NU3868M are grease: 1200 rpm; oil: 1500 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 NU3868M?
The catalogue reference mass for NU3868M is 18.6 kg. Confirm the supplied assembly and packed shipment weight separately when planning handling or transport.