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| Parameter | SKFNK 50/25Single row needle roller bearing with machined rings, with flanges, without inner ring | INANK50/25-F-XL50 × 62 × 25 mm | KOYONK50/25Needle roller bearings |
|---|---|---|---|
| Comparable specifications | |||
| Brand | SKF | INA | KOYO |
| Designation | NK 50/25 | NK50/25-F-XL | NK50/25 |
| Product family | Needle roller bearings | — | Heavy-duty needle roller bearings / Metric series, caged, without inner ring |
| Detailed type | Single row needle roller bearing with machined rings, with flanges, without inner ring | Needle roller bearings | Needle roller bearings |
| Series | — | NK50/25 | — |
| Bore diameterd | — | 50 mm | — |
| Outside diameterD | 62 mm | 62 mm | 62 mm |
| WidthB | 25 mm | 25 mm | — |
| Basic dynamic load ratingC | 41.5 kN | 43 kN | 40.7 kN |
| Basic static load ratingC0 | 73.5 kN | 74 kN | 79.3 kN |
| Fatigue load limitPu | 9.15 kN | 12.9 kN | 12.5 kN |
| Reference speednref | 8000 r/min | 5700 r/min | — |
| Limiting speednG | 9000 r/min | 9200 r/min | 5500 r/min |
| Mass≈m | 0.158 kg | 0.1563 kg | 0.171 kg |
| Sealing | Without | — | — |
| Cage | Sheet steel | — | — |
| Bearing material | Bearing steel | — | — |
| Lubricant | None | — | — |
| Minimum operating temperatureTmin | — | -30 °C | — |
| Maximum operating temperatureTmax | — | 120 °C | — |
| Classification | |||
| Official Category Path | — | — | Needle roller bearings - Heavy-duty needle roller bearings - Metric series, caged, without inner ring |
| Official Classification 1 | — | — | Needle roller bearings / Heavy-duty needle roller bearings / Metric series, caged, without inner ring |
| Dimensions | |||
| Bore diameter of needle roller complement | 50.0 mm | — | — |
| Engineering — Abutment dimensions | |||
| Diameter of housing abutmentD a | max. 58 mm | — | — |
| Fillet radiusr a | max. 0.6 mm | — | — |
| Engineering — Associated seals | |||
| Radial shaft seal with a low cross-sectional height, single lip | G 50x62x5 | — | — |
| Radial shaft seal with a low cross-sectional height, double lip | SD 50x62x5 | — | — |
| Engineering — Calculation data | |||
| SKF performance class | SKF Explorer | — | — |
| Engineering — Dimensions | |||
| Diameter under rollersF w | 50 mm | — | — |
| Chamfer dimension outer ringr 1,2 | min. 0.6 mm | — | — |
| Logistics | |||
| Product net weight | 0.158 kg | — | — |
| eClass code | 23-05-09-03 | — | — |
| UNSPSC code | 31171512 | — | — |
| Manufacturer Identity | |||
| Schaeffler Product Code | — | 383144 | — |
| Official Class Key | — | — | 090-030-010 |
| Base Type | — | NK50/25 | — |
| Gpsd Group | — | I01 | — |
| Product Line Id | — | 09 | — |
| X Life Marking | — | XL | — |
| Product identity | |||
| Official product category | Needle roller bearings | — | — |
| Official taxonomy path | /products/rolling-bearings/roller-bearings/needle-roller-bearings/needle-roller-bearings-with-machined-rings | — | — |
| Structure group ID | BN1_002 | — | — |
| Available from SKF | Yes | — | — |
| Remanufacturable | No | — | — |
| Product Identity | |||
| Construction | — | Needle roller bearing NK..-F-XL, single row, no inner ring, outer ring with 2 bords | — |
| Short Description | — | Needle roller bearing | — |
| Properties | |||
| Bearing part | Bearing without inner ring | — | — |
| Number of rows | 1 | — | — |
| Outer ring type | Machined (solid) | — | — |
| Aligning feature | Without | — | — |
| Number of flanges, outer ring | 2 | — | — |
| Tolerance class | Normal | — | — |
| Material, bearing | Bearing steel | — | — |
| Coating | Without | — | — |
| Relubrication feature | With | — | — |
| Indicative carbon footprint for new product | 0.59 kg CO 2 e | — | — |
| Technical Data | |||
| Fw | — | — | 50 mm |
| D | — | — | 62 mm |
| C | — | — | 25 mm |
| R(Min.) | — | — | 0.3 mm |
| Basic Load Ratings : Cr | — | — | 40.7 kN |
| Under Roller Diameter (Fw) | — | 50 mm | — |
| Basic Load Ratings : C0R | — | — | 79.3 kN |
| Outside Diamater (D) | — | 62 mm | — |
| Fatigue Load Limit : Cu | — | — | 12.5 kN |
| Width, Outer Ring (C) | — | 25 mm | — |
| Limiting Speeds(Grease Lub.) | — | — | 5500 min-1 |
| Basic Dynamic Load Rating, Radial (Cr) | — | 43,000 N | — |
| Limiting Speeds(Oil Lub.) | — | — | 8500 min-1 |
| Basic Static Load Rating, Radial (C0R) | — | 74,000 N | — |
| (Refer.)Mass | — | — | 0.171? kg |
| Operating Temperature Min. (Tmin) | — | -30 °C | — |
| Mass(Refer.) | — | — | 0.171? kg |
| Operating Temperature Max. (Tmax) | — | 120 °C | — |
| Limiting Speed (Limiting Spe) | — | 9,200 1/min | — |
| Reference Speed (Nϑr) | — | 5,700 1/min | — |
| Minimum Chamfer Dimension (Rmin) | — | 0.6 mm | — |
| Fatigue Load Limit, Radial (Cur) | — | 12,900 N | — |
Independent reference comparison based on the manufacturer data currently loaded. Always verify current limits, tolerances and suffix definitions with the official source before engineering selection.