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| Parameter | SKFNU 256 M280 × 500 × 80 mm | FAGNU256-E-M1A280 × 500 × 80 mm | TIMKENNU256EMA280 × 500 × 80 mm | NSKNU256M280 × 500 × 80 mm | KOYONU256280 × 500 × 80 mm |
|---|---|---|---|---|---|
| Comparable specifications | |||||
| Brand | SKF | FAG | TIMKEN | NSK | KOYO |
| Designation | NU 256 M | NU256-E-M1A | NU256EMA | NU256M | NU256 |
| Product family | Cylindrical roller bearings | — | Cylindrical 1-Row | Cylindrical roller bearing | Single-row / NU |
| Detailed type | Single row cylindrical roller bearing, nu design | Cylindrical roller bearings | Cylindrical roller bearings | Cylindrical roller bearings | Cylindrical roller bearings |
| Series | — | NU256 | NCS-841530 | — | — |
| Bore diameterd | 280 mm | 280 mm | 280 mm | 280 mm | 280 mm |
| Outside diameterD | 500 mm | 500 mm | 500 mm | 500 mm | 500 mm |
| WidthB | 80 mm | 80 mm | 80 mm | 80 mm | 80 mm |
| Basic dynamic load ratingC | 1190 kN | 1400 kN | 1540 kN | 1410 kN | 1430 kN |
| Basic static load ratingC0 | 1800 kN | 2020 kN | 1970 kN | 1680 kN | 1680 kN |
| Fatigue load limitPu | 156 kN | 151 kN | — | — | 179 kN |
| Reference speednref | 1400 r/min | 1020 r/min | — | — | — |
| Limiting speednG | 1500 r/min | 2020 r/min | — | — | 1000 r/min |
| Mass≈m | 71.8 kg | 70.7 kg | 69.81 kg | — | 72.7 kg |
| Precision class | — | PN — Normal (ISO 492:2023) | — | — | — |
| Internal clearance | CN | CN (Group N) — Normal internal clearance | — | — | — |
| Sealing | Without | — | Open | — | — |
| Cage | Machined brass | M1A — Two Piece Brass Cage Lip guided | Window Brass cage | Machined brass | — |
| Lubricant | None | — | — | — | — |
| Minimum operating temperatureTmin | — | -30 °C | — | — | — |
| Maximum operating temperatureTmax | — | 150 °C | — | — | — |
| Boundary dimensions | |||||
| Bearing widthB | — | — | — | 80 mm | — |
| Minimum bearing chamferr min. | — | — | — | 5 mm | — |
| Minimum secondary bearing chamferr1 min. | — | — | — | 5 mm | — |
| Roller inscribed circle diameterFw | — | — | — | 340 mm | — |
| Calculation Factors | |||||
| K Factor | — | — | 0.00 | — | — |
| Y1 Factor | — | — | 0.00 | — | — |
| Y2 Factor | — | — | 0.00 | — | — |
| Y0 Factor | — | — | 0.00 | — | — |
| E Factor | — | — | 0.00 | — | — |
| Cg Factor | — | — | 0.1727 | — | — |
| Capabilities & suitability | |||||
| Radial load capacity | — | Yes | — | — | — |
| Suitable for grease lubrication | — | Yes | — | — | — |
| Suitable for oil lubrication | — | Yes | — | — | — |
| Unsealed design | — | Yes | — | — | — |
| Catalogue reference mass | |||||
| Approximate shared-row mass — not separately stated for each rib arrangement | — | — | — | 70.7 kg | — |
| Classification | |||||
| Official Category Path | — | — | — | — | Cylindrical roller bearings - Single-row - NU |
| Official Classification 1 | — | — | — | — | Cylindrical roller bearings / Single-row / NU |
| Construction | |||||
| Single-row construction type | — | — | — | NU | — |
| Rib arrangement | — | — | — | Two outer-ring ribs; ribless inner ring | — |
| Standard cage material | — | — | — | Machined brass | — |
| Standard cage marking | — | — | — | M | — |
| Other cage codes listed for this catalogue row | — | — | — | None listed in this row | — |
| 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 | — |
| Dimensions | |||||
| Minimum chamfer dimensionrmin | — | 5 mm | — | — | — |
| Minimum chamfer dimensionrmin | — | 0.197 in | — | — | — |
| Minimum chamfer dimensionr1 min | — | 5 mm | — | — | — |
| Minimum chamfer dimensionr1 min | — | 0.197 in | — | — | — |
| Axial displacements | — | 6.3 mm | — | — | — |
| Axial displacements | — | 0.248 in | — | — | — |
| Raceway diameter outer ringE | — | 449 mm | — | — | — |
| Raceway diameter outer ringE | — | 17.677 in | — | — | — |
| Raceway diameter inner ringF | — | 337 mm | — | — | — |
| Raceway diameter inner ringF | — | 13.268 in | — | — | — |
| Minimum rib diameter outer ringD1 min | — | 426.6 mm | — | — | — |
| Minimum rib diameter outer ringD1 min | — | 16.795 in | — | — | — |
| Engineering — Abutment dimensions | |||||
| Diameter of spacer sleeved a | max. 333 mm | — | — | — | — |
| Diameter of shaft abutmentd b | min. 344 mm | — | — | — | — |
| Diameter of housing abutmentD a | max. 480 mm | — | — | — | — |
| Radius of filletr a | max. 4 mm | — | — | — | — |
| Radius of filletr b | max. 4 mm | — | — | — | — |
| Engineering — Calculation data | |||||
| Minimum load factork r | 0.15 | — | — | — | — |
| Limiting valuee | 0.2 | — | — | — | — |
| Calculation factorY | 0.6 | — | — | — | — |
| Engineering — Dimensions | |||||
| Shoulder diameter of outer ringD 1 | ≈ 417 mm | — | — | — | — |
| Raceway diameter of inner ringF | 340 mm | — | — | — | — |
| Chamfer dimensionr 1,2 | min. 5 mm | — | — | — | — |
| Permissible axial displacements | max. 3.8 mm | — | — | — | — |
| Load ratings — standard cage | |||||
| Basic dynamic radial load ratingCr | — | — | — | 1410000 N | — |
| Basic static radial load ratingC0r | — | — | — | 1680000 N | — |
| Logistics | |||||
| Product net weight | 71.8 kg | — | — | — | — |
| eClass code | 23-05-09-01 | — | — | — | — |
| UNSPSC code | 31171505 | — | — | — | — |
| Lubrication-qualified speed — standard cage | |||||
| Thermal speed rating — oil bath | — | — | — | 1300 r/min | — |
| Mechanical limiting speed — forced oil circulation | — | — | — | Not stated in this catalogue row | — |
| Limiting speed — grease | — | — | — | 1100 r/min | — |
| Limiting speed — oil bath | — | — | — | 1400 r/min | — |
| Main Dimensions & Performance Data | |||||
| Basic dynamic load rating, radialCr | — | 1,400,000 N | — | — | — |
| Basic dynamic load rating, radialCr | — | 314,748.201 lbf | — | — | — |
| Basic static load rating, radialC0r | — | 2,020,000 N | — | — | — |
| Basic static load rating, radialC0r | — | 454,136.691 lbf | — | — | — |
| Fatigue load limit, radialCur | — | 151,000 N | — | — | — |
| Fatigue load limit, radialCur | — | 33,947.842 lbf | — | — | — |
| Manufacturer Identity | |||||
| Schaeffler Product Code | — | 367910 | — | — | — |
| Material Number | — | — | 000000000190051056 | — | — |
| Official Class Key | — | — | — | — | 040-010-000 |
| Base Type | — | NU256 | — | — | — |
| World Assembly Part Number | — | — | NU256EMA | — | — |
| Old Designation | — | ["NU256E.M1A","NU256MA"] | — | — | — |
| Inner Ring Part Number | — | — | 280ARUE02 | — | — |
| Gpsd Group | — | F01 | — | — | — |
| Outer Ring Part Number | — | — | 280ERUE02 | — | — |
| Product Line Id | — | 75 | — | — | — |
| Drawing Number | — | — | M956939 | — | — |
| X Life Marking | — | n.r. | — | — | — |
| Upc | — | — | 0013992257536 | — | — |
| Official Source System | — | — | CORE BP - DS DF | — | — |
| Official Last Run | — | — | 2026-08-23T20:02:48.583 | — | — |
| SAP material number | — | 0192463400000 | — | — | — |
| Base product | — | 2305090102 | — | — | — |
| Mounting dimensions | |||||
| Minimum diameter shaft shoulderda min | — | 300 mm | — | — | — |
| Minimum diameter shaft shoulderda min | — | 11.811 in | — | — | — |
| Maximum diameter of shaft shoulderda max | — | 334 mm | — | — | — |
| Maximum diameter of shaft shoulderda max | — | 13.15 in | — | — | — |
| Minimum shaft shoulderdb min | — | 340 mm | — | — | — |
| Minimum shaft shoulderdb min | — | 13.386 in | — | — | — |
| Maximum diameter of housing shoulderDa max | — | 480 mm | — | — | — |
| Maximum diameter of housing shoulderDa max | — | 18.898 in | — | — | — |
| Maximum recess radiusra max | — | 4 mm | — | — | — |
| Maximum recess radiusra max | — | 0.157 in | — | — | — |
| Maximum recess radiusra1 max | — | 4 mm | — | — | — |
| Maximum recess radiusra1 max | — | 0.157 in | — | — | — |
| Mounting dimensions — shown arrangement | |||||
| Minimum shaft shoulder diameterdb min. | — | — | — | 300 mm | — |
| Maximum housing shoulder diameterDa max. | — | — | — | 480 mm | — |
| Maximum adjusting-ring diameter (NU/NJ arrangement)db max. | — | — | — | 334 mm | — |
| Maximum adjacent fillet radiusra max. | — | — | — | 4 mm | — |
| Maximum secondary adjacent fillet radiusrb max. | — | — | — | 4 mm | — |
| Product characteristics | |||||
| DesignE | — | Increased Capacity Design | — | — | — |
| Radial internal clearanceCN (Group N) | — | Normal internal clearance | — | — | — |
| Tolerance classPN | — | Normal (ISO 492:2023) | — | — | — |
| Number of rows1 | — | Single-row design | — | — | — |
| 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 | Yes | — | — | — | — |
| Product Identity | |||||
| Construction | — | Cylindrical roller bearing NU..-E-M1A, with cage, single row, non-locating bearing, 2 ribs on outer ring, 0 ribs on inner ring (smooth), type NU, Running accuracy in P6 | Single Row Cylindrical Roller Bearing | Imperial Series | 11.0236 in Bore | 19.6850 in OD | 3.1496 in Width | Open | Cylindrical Bore | Machined Window Brass Cage | C0 Clearance | — | — |
| Type Description | — | — | Cylindrical 1-Row | — | — |
| Short Description | — | Cylindrical roller bearing | — | — | — |
| Number Of Rows | 1 | — | 1 | — | — |
| Tapered Bore | — | — | N | — | — |
| Properties | |||||
| Bearing part | Complete bearing | — | — | — | — |
| Axial displacement capability | In both directions | — | — | — | — |
| Locating feature, bearing outer ring | Without | — | — | — | — |
| Bore type | Cylindrical | — | — | — | — |
| Number of flanges, outer ring | 2 | — | — | — | — |
| Number of flanges, inner ring | 0 | — | — | — | — |
| Loose flange | None | — | — | — | — |
| Radial internal clearance | CN | — | — | — | — |
| Tolerance class | Normal | — | — | — | — |
| Coating | Without | — | — | — | — |
| Relubrication feature | Without | — | — | — | — |
| Candidate for remanufacturing | Yes | — | — | — | — |
| Indicative carbon footprint for new product | 266.0 kg CO 2 e | — | — | — | — |
| Indicative carbon footprint for remanufactured product | 88.3 kg CO 2 e | — | — | — | — |
| Technical Data | |||||
| d | — | — | — | — | 500 mm |
| B | — | — | — | — | 80 mm |
| R(Min.) | — | — | — | — | 5 mm |
| R1(Min.) | — | — | — | — | 5 mm |
| Bore Diameter (D) | — | 280 mm | — | — | — |
| Overall Width | — | — | 0.000 mm | — | — |
| Fw | — | — | — | — | 340 mm |
| Outside Diamater (D) | — | 500 mm | — | — | — |
| Radial Rating | — | — | 1,540,000 N | — | — |
| Ew | — | — | — | — | - mm |
| Total Width (B) | — | 80 mm | — | — | — |
| Axial Rating | — | — | 0 N | — | — |
| Basic Load Ratings : Cr | — | — | — | — | 1430 kN |
| Basic Dynamic Load Rating, Radial (Cr) | — | 1,400,000 N | — | — | — |
| Dynamic Rating C1 | — | — | 1,540,000 N | — | — |
| Basic Load Ratings : C0R | — | — | — | — | 1680 kN |
| Basic Static Load Rating, Radial (C0R) | — | 2,020,000 N | — | — | — |
| Dynamic Rating C90 | — | — | 0 N | — | — |
| Fatigue Load Limit : Cu | — | — | — | — | 179 kN |
| Raceway Diameter Inner Ring (F) | — | 337 mm | — | — | — |
| Dynamic Axial Rating Ca90 | — | — | 0 N | — | — |
| Limiting Speeds(Grease Lub.) | — | — | — | — | 1000 min-1 |
| Operating Temperature Min. (Tmin) | — | -30 °C | — | — | — |
| Dynamic Axial Rating Ca1 | — | — | 0 N | — | — |
| Limiting Speeds(Oil Lub.) | — | — | — | — | 1200 min-1 |
| Minimum Diameter Shaft Shoulder (Da) | — | 300 mm | — | — | — |
| Static Radial Rating C0 | — | — | 1,970,000 N | — | — |
| Sd1 | — | — | — | — | - mm |
| Operating Temperature Max. (Tmax) | — | 150 °C | — | — | — |
| Extended Dynamic Rating Ce | — | — | 0 N | — | — |
| B1 | — | — | — | — | - mm |
| Limiting Speed (Limiting Spe) | — | 2,020 1/min | — | — | — |
| Static Axial Rating C0A | — | — | 0 N | — | — |
| B2 | — | — | — | — | - mm |
| Reference Speed (Nϑr) | — | 1,020 1/min | — | — | — |
| Da(Min.) | — | — | — | — | - mm |
| Maximum Recess Radius (Ra Max) | — | 4 mm | — | — | — |
| Db(Min.) | — | — | — | — | - mm |
| Maximum Diameter Of Housing Shoulder (Da) | — | 480 mm | — | — | — |
| Db(Max.) | — | — | — | — | - mm |
| Minimum Chamfer Dimension (R1 Min) | — | 5 mm | — | — | — |
| Dc(Min.) | — | — | — | — | - mm |
| Axial Displacement (S) | — | 6.3 mm | — | — | — |
| Dd(Min.) | — | — | — | — | - mm |
| Minimum Rib Diameter Outer Ring (D1 Min) | — | 426.6 mm | — | — | — |
| Da(Max.) | — | — | — | — | 480 mm |
| Maximum Diameter Of Shaft Shoulder (Da Max) | — | 334 mm | — | — | — |
| Maximum Recess Radius (Ra1 Max) | — | 4 mm | — | — | — |
| Minimum Chamfer Dimension (Rmin) | — | 5 mm | — | — | — |
| Ra(Max.) | — | — | — | — | 4 mm |
| Raceway Diameter Outer Ring (E) | — | 449 mm | — | — | — |
| Rb(Max.) | — | — | — | — | 4 mm |
| Minimum Shaft Shoulder (Db Min) | — | 340 mm | — | — | — |
| Mass(Refer.) | — | — | — | — | 72.7 kg |
| Fatigue Load Limit, Radial (Cur) | — | 151,000 N | — | — | — |
| Temperature range | |||||
| Operating temperature min.Tmin | — | -30 °C | — | — | — |
| Operating temperature min.Tmin | — | -22 °F | — | — | — |
| Operating temperature max.Tmax | — | 150 °C | — | — | — |
| Operating temperature max.Tmax | — | 302 °F | — | — | — |
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.