Cross-brand designation analysis
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You entered NJ-256-MA. This table explores the base group NJ256; it does not preserve or approve every requested suffix. Search your complete marking first →
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One base designation across loaded brands
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Dimensions verified
“NJ256” across 3 loaded brands
At least two brands share the same bore, outside diameter and width. Use Custom Compare when you want to choose exact suffix variants yourself.
Technical comparison
Choose exact variants instead →Brand differences at a glance
| Parameter | SKFNJ 256 MA280 × 500 × 80 mm | NSKNJ256M280 × 500 × 80 mm | KOYONJ256280 × 500 × 80 mm |
|---|---|---|---|
| Comparable specifications | |||
| Brand | SKF | NSK | KOYO |
| Designation | NJ 256 MA | NJ256M | NJ256 |
| Product family | Cylindrical roller bearings | Cylindrical roller bearing | Single-row / NJ |
| Detailed type | Single row cylindrical roller bearing, nj design | Cylindrical roller bearings | Cylindrical roller bearings |
| Bore diameterd | 280 mm | 280 mm | 280 mm |
| Outside diameterD | 500 mm | 500 mm | 500 mm |
| WidthB | 80 mm | 80 mm | 80 mm |
| Basic dynamic load ratingC | 1140 kN | 1410 kN | 1430 kN |
| Basic static load ratingC0 | 1800 kN | 1680 kN | 1680 kN |
| Fatigue load limitPu | 156 kN | — | 179 kN |
| Reference speednref | 1400 r/min | — | — |
| Limiting speednG | 1900 r/min | — | 1000 r/min |
| Mass≈m | 73 kg | — | 74.4 kg |
| Internal clearance | CN | — | — |
| Sealing | Without | — | — |
| Cage | Machined brass | Machined brass | — |
| Lubricant | None | — | — |
| 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 | — |
| 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 - NJ |
| Official Classification 1 | — | — | Cylindrical roller bearings / Single-row / NJ |
| Construction | |||
| Single-row construction type | — | NJ | — |
| Rib arrangement | — | Two outer-ring ribs; one inner-ring rib | — |
| 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 | — |
| Engineering — Abutment dimensions | |||
| Diameter of spacer sleeved a | max. 333 mm | — | — |
| Diameter of shaft abutmentd b | min. 364 mm | — | — |
| Diameter of housing abutmentD a | max. 480 mm | — | — |
| Radius of filletr a | 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 inner ringd 1 | ≈ 360 mm | — | — |
| 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 | 73.0 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 | — |
| Manufacturer Identity | |||
| Official Class Key | — | — | 040-010-000 |
| 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 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 | — | — |
| 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 | 2 | — | — |
| Number of flanges, inner ring | 1 | — | — |
| 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 | 270.0 kg CO 2 e | — | — |
| Indicative carbon footprint for remanufactured product | 89.8 kg CO 2 e | — | — |
| Technical Data | |||
| d | — | — | 500 mm |
| B | — | — | 80 mm |
| R(Min.) | — | — | 5 mm |
| R1(Min.) | — | — | 5 mm |
| Fw | — | — | 340 mm |
| Ew | — | — | - mm |
| Basic Load Ratings : Cr | — | — | 1430 kN |
| Basic Load Ratings : C0R | — | — | 1680 kN |
| Fatigue Load Limit : Cu | — | — | 179 kN |
| Limiting Speeds(Grease Lub.) | — | — | 1000 min-1 |
| Limiting Speeds(Oil Lub.) | — | — | 1200 min-1 |
| Sd1 | — | — | - mm |
| B1 | — | — | - mm |
| B2 | — | — | - mm |
| Da(Min.) | — | — | - mm |
| Db(Min.) | — | — | - mm |
| Db(Max.) | — | — | - mm |
| Dc(Min.) | — | — | - mm |
| Dd(Min.) | — | — | - mm |
| Da(Max.) | — | — | 480 mm |
| Ra(Max.) | — | — | 4 mm |
| Rb(Max.) | — | — | 4 mm |
| Mass(Refer.) | — | — | 74.4 kg |
Automatic matching is a search aid, not an interchangeability declaration. Confirm the full suffix, tolerances, internal design and application limits before substitution.