SKF NNTR55X140X70.2ZL track roller — support roller. Heavy-section outer-ring roller bearing designed to run directly on a linear track or profile rail, carrying radial load between a stationary axle and the moving track. Yoke-type (LR / RSTO / STO) or stud-type (LFR / KRV / KR / KRE). Widely used on trolley conveyors, sliding-gate rollers, deck-crane trolleys.
| Type | Track roller — support roller |
| Designation | SKF NNTR55X140X70.2ZL |
| HS code | 8482.20 |
| Functional outside diameter | 140 mm |
| Bore diameter | 55 mm |
| Width, total | 70 mm |
| Width, outer ring | 68 mm |
| Basic dynamic load rating | 209 kN |
| Basic static load rating | 275 kN |
| Limiting speed | 700 r/min |
| Bearing part | Complete track roller |
| Rolling elements | Cylindrical rollers |
| Number of rows | 2 |
| Outer ring profile | Crowned |
| Axial guidance of outer ring | Yes |
| Number of flanges, outer ring | 2 |
| Cage | Without |
| Radial internal clearance | Between C2 and CN |
| Tolerance class | Other |
| Material, bearing | Bearing steel |
| Coating | Without |
| Sealing | Seal on both sides |
| Sealing type | Lamellar |
| Lubricant | Grease |
| Relubrication feature | With |
| Product net weight | 6.3 kg |
| eClass code | 23-05-09-03 |
| UNSPSC code | 31171512 |
| Material | As declared by SKF designation suffix |
| Temperature range | Per SKF product data |
| Primary standard | SKF designation convention |
| MOQ | 1 |
Interchange with peer OEM equivalents on identical boundary plan and execution — confirm cage, clearance, sealing and precision-class suffix before substitution.