Single-row cylindrical roller bearings
NU321EM Bearing Dimensions & Specifications
Review available bearing dimensions and technical specifications. Retain the complete designation and suffix when comparing a replacement.
Technical specifications
| Abutment dimension Da Da | 212 mm |
|---|---|
| Abutment dimension db db | 121 mm |
| Bore d | 105 mm |
| Minimum chamfer r12 r12 | 3 mm |
| Minimum chamfer r34 r34 | 3 mm |
| Maximum fillet ra ra | 2.5 mm |
| Maximum fillet rb rb | 2.5 mm |
| Catalogue dynamic load (original symbol) Cr | 420 kN |
| Catalogue static load (original symbol) Cor | 550 kN |
| Mass mass | 10.6 kg |
| Outside diameter D | 225 mm |
| Roller envelope diameter Fw Fw | 133 mm |
| Grease-lubricated speed grease | 2200 rpm |
| Oil-lubricated speed oil | 2800 rpm |
| Width B (type-specific) B | 49 mm |
Fields without confirmed values are omitted. Final supply configuration and application suitability require technical confirmation.