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| Parameter | SKFNF 307 ECP35 × 80 × 21 mm | NSKNF307W35 × 80 × 21 mm | KOYONF30735 × 80 × 21 mm |
|---|---|---|---|
| Comparable specifications | |||
| Brand | SKF | NSK | KOYO |
| Designation | NF 307 ECP | NF307W | NF307 |
| Product family | Cylindrical roller bearings | Cylindrical roller bearing | Single-row / NF |
| Detailed type | Single row cylindrical roller bearing | Cylindrical roller bearings | Cylindrical roller bearings |
| Bore diameterd | 35 mm | 35 mm | 35 mm |
| Outside diameterD | 80 mm | 80 mm | 80 mm |
| WidthB | 21 mm | 21 mm | 21 mm |
| Basic dynamic load ratingC | 75 kN | 61 kN | 62 kN |
| Basic static load ratingC0 | 63 kN | 47 kN | 46.9 kN |
| Fatigue load limitPu | 8.15 kN | — | 6.2 kN |
| Reference speednref | 9500 r/min | — | — |
| Limiting speednG | 11000 r/min | — | 7900 r/min |
| Mass≈m | 0.47 kg | — | 0.484 kg |
| Internal clearance | CN | — | — |
| Sealing | Without | — | — |
| Cage | Non-metallic | Pressed steel | — |
| Lubricant | None | — | — |
| Boundary dimensions | |||
| Bearing widthB | — | 21 mm | — |
| Minimum bearing chamferr min. | — | 1.5 mm | — |
| Minimum secondary bearing chamferr1 min. | — | 1.1 mm | — |
| Roller circumscribed circle diameterEw | — | 68.2 mm | — |
| Catalogue reference mass | |||
| Approximate shared-row mass — not separately stated for each rib arrangement | — | 0.476 kg | — |
| Classification | |||
| Official Category Path | — | — | Cylindrical roller bearings - Single-row - NF |
| Official Classification 1 | — | — | Cylindrical roller bearings / Single-row / NF |
| Construction | |||
| Single-row construction type | — | NF | — |
| Rib arrangement | — | Two inner-ring ribs; one outer-ring rib | — |
| Standard cage material | — | Pressed steel | — |
| Standard cage marking | — | W | — |
| Other cage codes listed for this catalogue row | — | M | — |
| Precision — designation omission rule | — | ISO Normal when no precision suffix is specified | — |
| Clearance identification — verify interchangeability | — | No clearance suffix shown. CN omission applies to interchangeable designs; do not infer a numerical clearance. | — |
| Optimized crowning note | — | No optimized-crowning asterisk on this row | — |
| Engineering — Abutment dimensions | |||
| Diameter of spacer sleeved a | min. 43 mm | — | — |
| Diameter of housing abutmentD a | max. 72.2 mm | — | — |
| Diameter of housing abutmentD b | min. 71.8 mm | — | — |
| Radius of filletr a | max. 1.5 mm | — | — |
| Engineering — Calculation data | |||
| SKF performance class | SKF Explorer | — | — |
| Minimum load factork r | 0.12 | — | — |
| Limiting valuee | 0.2 | — | — |
| Calculation factorY | 0.6 | — | — |
| Engineering — Dimensions | |||
| Shoulder diameter of inner ringd 1 | ≈ 51 mm | — | — |
| Shoulder diameter of outer ringD 1 | ≈ 65.8 mm | — | — |
| Raceway diameter of outer ringE | 70.2 mm | — | — |
| Chamfer dimensionr 1,2 | min. 1.5 mm | — | — |
| Chamfer dimensionr 3,4 | min. 1.1 mm | — | — |
| Permissible axial displacements | max. 1.2 mm | — | — |
| Load ratings — standard cage | |||
| Basic dynamic radial load ratingCr | — | 61000 N | — |
| Basic static radial load ratingC0r | — | 47000 N | — |
| Logistics | |||
| Product net weight | 0.47 kg | — | — |
| eClass code | 23-05-09-01 | — | — |
| UNSPSC code | 31171505 | — | — |
| Lubrication-qualified speed — standard cage | |||
| Thermal speed rating — oil bath | — | 9500 r/min | — |
| Mechanical limiting speed — forced oil circulation | — | Not stated in this catalogue row | — |
| Limiting speed — grease | — | 6300 r/min | — |
| Limiting speed — oil bath | — | 7500 r/min | — |
| Manufacturer Identity | |||
| Official Class Key | — | — | 040-010-000 |
| Mounting dimensions — shown arrangement | |||
| Minimum shaft shoulder diameterda min. | — | 43 mm | — |
| Maximum housing shoulder diameterDb max. | — | 73.5 mm | — |
| Minimum housing shoulder diameterDb min. | — | 70 mm | — |
| Maximum adjacent fillet radiusra max. | — | 1.5 mm | — |
| Maximum secondary adjacent fillet radiusrb max. | — | 1 mm | — |
| Product identity | |||
| Official product category | Cylindrical roller bearings | — | — |
| Official taxonomy path | /products/rolling-bearings/roller-bearings/cylindrical-roller-bearings/single-row-cylindrical-roller-bearings | — | — |
| Structure group ID | BC1_001_101 | — | — |
| Available from SKF | Yes | — | — |
| Remanufacturable | No | — | — |
| Properties | |||
| Bearing part | Complete bearing | — | — |
| Axial displacement capability | In one direction | — | — |
| Number of rows | 1 | — | — |
| Locating feature, bearing outer ring | Without | — | — |
| Bore type | Cylindrical | — | — |
| Number of flanges, outer ring | 1 | — | — |
| Number of flanges, inner ring | 2 | — | — |
| Loose flange | None | — | — |
| Radial internal clearance | CN | — | — |
| Tolerance class | Normal | — | — |
| Coating | Without | — | — |
| Relubrication feature | Without | — | — |
| Indicative carbon footprint for new product | 1.7 kg CO 2 e | — | — |
| Technical Data | |||
| d | — | — | 80 mm |
| B | — | — | 21 mm |
| R(Min.) | — | — | 1.5 mm |
| R1(Min.) | — | — | 1.1 mm |
| Fw | — | — | - mm |
| Ew | — | — | 68.2 mm |
| Basic Load Ratings : Cr | — | — | 62.0 kN |
| Basic Load Ratings : C0R | — | — | 46.9 kN |
| Fatigue Load Limit : Cu | — | — | 6.20 kN |
| Limiting Speeds(Grease Lub.) | — | — | 7900 min-1 |
| Limiting Speeds(Oil Lub.) | — | — | 10000 min-1 |
| Sd1 | — | — | - mm |
| B1 | — | — | - mm |
| B2 | — | — | - mm |
| Da(Min.) | — | — | 43 mm |
| Db(Min.) | — | — | 71 mm |
| Db(Max.) | — | — | 73.5 mm |
| Dc(Min.) | — | — | - mm |
| Dd(Min.) | — | — | - mm |
| Da(Max.) | — | — | - mm |
| Ra(Max.) | — | — | 1.5 mm |
| Rb(Max.) | — | — | 1 mm |
| Mass(Refer.) | — | — | 0.484 kg |
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.