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| Parameter | SKFNJ 321 ECJ105 × 225 × 49 mm | FAGNJ321-E-XL-M1105 × 225 × 49 mm | TIMKENNJ321EMAC3105 × 225 × 49 mm | NSKNJ321EM105 × 225 × 49 mm |
|---|---|---|---|---|
| Comparable specifications | ||||
| Brand | SKF | FAG | TIMKEN | NSK |
| Designation | NJ 321 ECJ | NJ321-E-XL-M1 | NJ321EMAC3 | NJ321EM |
| Product family | Cylindrical roller bearings | — | Cylindrical 1-Row | Cylindrical roller bearing |
| Detailed type | Single row cylindrical roller bearing, nj design | Cylindrical roller bearings | Cylindrical roller bearings | Cylindrical roller bearings |
| Series | — | NJ321 | NCS-151386 | — |
| Bore diameterd | 105 mm | 105 mm | 105 mm | 105 mm |
| Outside diameterD | 225 mm | 225 mm | 225 mm | 225 mm |
| WidthB | 49 mm | 49 mm | 49 mm | 49 mm |
| Basic dynamic load ratingC | 500 kN | 495 kN | 490 kN | 525 kN |
| Basic static load ratingC0 | 500 kN | 470 kN | 499 kN | 480 kN |
| Fatigue load limitPu | 57 kN | 81 kN | — | — |
| Reference speednref | 3200 r/min | 3200 r/min | — | — |
| Limiting speednG | 3800 r/min | 5300 r/min | — | — |
| Mass≈m | 8.69 kg | 10.22 kg | 9.8 kg | — |
| Precision class | — | PN — Normal (ISO 492:2023) | — | — |
| Internal clearance | CN | CN (Group N) — Normal internal clearance | — | — |
| Sealing | Without | — | Open | — |
| Cage | Sheet metal | M1 — Two Piece Brass Cage Roller Guided | Window Brass cage | Machined brass |
| Lubricant | None | — | — | — |
| Minimum operating temperatureTmin | — | -30 °C | — | — |
| Maximum operating temperatureTmax | — | 150 °C | — | — |
| Additional information | ||||
| L-washer | — | HJ321-E | — | — |
| Boundary dimensions | ||||
| Bearing widthB | — | — | — | 49 mm |
| Minimum bearing chamferr min. | — | — | — | 3 mm |
| Minimum secondary bearing chamferr1 min. | — | — | — | 3 mm |
| Roller inscribed circle diameterFw | — | — | — | 133 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 | — | — | 0.1068 | — |
| Capabilities & suitability | ||||
| Radial load capacity | — | Yes | — | — |
| Axial load capacity in one direction | — | 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 | — | — | — | 9.84 kg |
| 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 | — | — | — | Catalogue asterisk: optimized crowning may be available; not verified as fitted |
| Dimensions | ||||
| Minimum chamfer dimensionrmin | — | 3 mm | — | — |
| Minimum chamfer dimensionrmin | — | 0.118 in | — | — |
| Minimum chamfer dimensionr1 min | — | 3 mm | — | — |
| Minimum chamfer dimensionr1 min | — | 0.118 in | — | — |
| Axial displacements | — | 1.4 mm | — | — |
| Axial displacements | — | 0.055 in | — | — |
| Raceway diameter outer ringE | — | 201 mm | — | — |
| Raceway diameter outer ringE | — | 7.913 in | — | — |
| Raceway diameter inner ringF | — | 133 mm | — | — |
| Raceway diameter inner ringF | — | 5.236 in | — | — |
| Minimum rib diameter outer ringD1 min | — | 189.7 mm | — | — |
| Minimum rib diameter outer ringD1 min | — | 7.469 in | — | — |
| Maximum rib diameter inner ringd1 | — | 146.1 mm | — | — |
| Maximum rib diameter inner ringd1 | — | 5.752 in | — | — |
| Engineering — Abutment dimensions | ||||
| Diameter of spacer sleeved a | max. 129 mm | — | — | — |
| Diameter of shaft abutmentd b | min. 148 mm | — | — | — |
| Diameter of housing abutmentD a | max. 209.4 mm | — | — | — |
| Radius of filletr a | max. 2.5 mm | — | — | — |
| Engineering — Calculation data | ||||
| SKF performance class | SKF Explorer | — | — | — |
| Minimum load factork r | 0.15 | — | — | — |
| Limiting valuee | 0.2 | — | — | — |
| Calculation factorY | 0.6 | — | — | — |
| Engineering — Dimensions | ||||
| Shoulder diameter of inner ringd 1 | ≈ 145 mm | — | — | — |
| Shoulder diameter of outer ringD 1 | ≈ 189 mm | — | — | — |
| Raceway diameter of inner ringF | 133 mm | — | — | — |
| Chamfer dimensionr 1,2 | min. 3 mm | — | — | — |
| Chamfer dimensionr 3,4 | min. 3 mm | — | — | — |
| Permissible axial displacements | max. 3.4 mm | — | — | — |
| Load ratings — standard cage | ||||
| Basic dynamic radial load ratingCr | — | — | — | 525000 N |
| Basic static radial load ratingC0r | — | — | — | 480000 N |
| Logistics | ||||
| Product net weight | 8.69 kg | — | — | — |
| eClass code | 23-05-09-01 | — | — | — |
| UNSPSC code | 31171505 | — | — | — |
| Lubrication-qualified speed — standard cage | ||||
| Thermal speed rating — oil bath | — | — | — | 3400 r/min |
| Mechanical limiting speed — forced oil circulation | — | — | — | 5300 r/min |
| Limiting speed — grease | — | — | — | 2600 r/min |
| Limiting speed — oil bath | — | — | — | 3200 r/min |
| Main Dimensions & Performance Data | ||||
| Basic dynamic load rating, radialCr | — | 495,000 N | — | — |
| Basic dynamic load rating, radialCr | — | 111,285.971 lbf | — | — |
| Basic static load rating, radialC0r | — | 470,000 N | — | — |
| Basic static load rating, radialC0r | — | 105,665.468 lbf | — | — |
| Fatigue load limit, radialCur | — | 81,000 N | — | — |
| Fatigue load limit, radialCur | — | 18,210.432 lbf | — | — |
| Manufacturer Identity | ||||
| Schaeffler Product Code | — | 371496 | — | — |
| Material Number | — | — | 000000000190080224 | — |
| Base Type | — | NJ321 | — | — |
| World Assembly Part Number | — | — | NJ321EMA | — |
| Old Designation | — | ["NJ321-E-M1","NJ321E.M1"] | — | — |
| Inner Ring Part Number | — | — | 105ARJE03 | — |
| Gpsd Group | — | F01 | — | — |
| Outer Ring Part Number | — | — | 105ERUE03 | — |
| Product Line Id | — | 63 | — | — |
| Drawing Number | — | — | M954462 | — |
| X Life Marking | — | XL | — | — |
| Upc | — | — | 0013992469120 | — |
| Official Source System | — | — | CORE BP - DS DF | — |
| Official Last Run | — | — | 2026-08-23T20:02:48.51 | — |
| SAP material number | — | 0167366720000 | — | — |
| Base product | — | 2305090111 | — | — |
| Bearing X designation | — | NJ321-E-XL-M1 | — | — |
| Mounting Manager ID | — | NJ321-E-XL-M1 | — | — |
| Grease application ID | — | NJ321-E-XL-M1 | — | — |
| Mounting dimensions | ||||
| Minimum diameter shaft shoulderda min | — | 119 mm | — | — |
| Minimum diameter shaft shoulderda min | — | 4.685 in | — | — |
| Maximum diameter of shaft shoulderda max | — | 132 mm | — | — |
| Maximum diameter of shaft shoulderda max | — | 5.197 in | — | — |
| Maximum diameter of housing shoulderDa max | — | 211 mm | — | — |
| Maximum diameter of housing shoulderDa max | — | 8.307 in | — | — |
| Minimum shaft shoulderdc min | — | 149 mm | — | — |
| Minimum shaft shoulderdc min | — | 5.866 in | — | — |
| Maximum recess radiusra max | — | 2.5 mm | — | — |
| Maximum recess radiusra max | — | 0.098 in | — | — |
| Mounting dimensions — shown arrangement | ||||
| Minimum shaft shoulder diameterdb min. | — | — | — | 118 mm |
| Maximum housing shoulder diameterDa max. | — | — | — | 212 mm |
| Maximum adjusting-ring diameter (NU/NJ arrangement)db max. | — | — | — | 129 mm |
| Maximum adjacent fillet radiusra max. | — | — | — | 2.5 mm |
| Maximum secondary adjacent fillet radiusrb max. | — | — | — | 2.5 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 | No | — | — | — |
| Product Identity | ||||
| Construction | — | Cylindrical roller bearing NJ..-E-XL-M1, with cage, single row, semi-locating bearing, 2 ribs on outer ring, 1 rib on inner ring, type NJ | Single Row Cylindrical Roller Bearing | Imperial Series | 4.1339 in Bore | 8.8583 in OD | 1.9291 in Width | Open | Cylindrical Bore | Machined Window Brass Cage | C3 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 one direction | — | — | — |
| 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 | — | — | — |
| Indicative carbon footprint for new product | 32.2 kg CO 2 e | — | — | — |
| Technical Data | ||||
| Bore Diameter (D) | — | 105 mm | — | — |
| Overall Width | — | — | 0.000 mm | — |
| Outside Diamater (D) | — | 225 mm | — | — |
| Radial Rating | — | — | 490,000 N | — |
| Total Width (B) | — | 49 mm | — | — |
| Axial Rating | — | — | 0 N | — |
| Basic Dynamic Load Rating, Radial (Cr) | — | 495,000 N | — | — |
| Dynamic Rating C1 | — | — | 490,000 N | — |
| Basic Static Load Rating, Radial (C0R) | — | 470,000 N | — | — |
| Dynamic Rating C90 | — | — | 0 N | — |
| Raceway Diameter Inner Ring (F) | — | 133 mm | — | — |
| Dynamic Axial Rating Ca90 | — | — | 0 N | — |
| Operating Temperature Min. (Tmin) | — | -30 °C | — | — |
| Dynamic Axial Rating Ca1 | — | — | 0 N | — |
| Minimum Diameter Shaft Shoulder (Da) | — | 119 mm | — | — |
| Static Radial Rating C0 | — | — | 499,000 N | — |
| Operating Temperature Max. (Tmax) | — | 150 °C | — | — |
| Extended Dynamic Rating Ce | — | — | 0 N | — |
| Limiting Speed (Limiting Spe) | — | 5,300 1/min | — | — |
| Static Axial Rating C0A | — | — | 0 N | — |
| Minimum Shaft Shoulder (Dc Min) | — | 149 mm | — | — |
| Reference Speed (Nϑr) | — | 3,200 1/min | — | — |
| Maximum Recess Radius (Ra Max) | — | 2.5 mm | — | — |
| Maximum Diameter Of Housing Shoulder (Da) | — | 211 mm | — | — |
| Maximum Rib Diameter Inner Ring (D1) | — | 146.1 mm | — | — |
| Minimum Chamfer Dimension (R1 Min) | — | 3 mm | — | — |
| Axial Displacement (S) | — | 1.4 mm | — | — |
| Minimum Rib Diameter Outer Ring (D1 Min) | — | 189.7 mm | — | — |
| Maximum Diameter Of Shaft Shoulder (Da Max) | — | 132 mm | — | — |
| Minimum Chamfer Dimension (Rmin) | — | 3 mm | — | — |
| Raceway Diameter Outer Ring (E) | — | 201 mm | — | — |
| Fatigue Load Limit, Radial (Cur) | — | 81,000 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.