Cross-brand designation analysis
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You entered NJ2304ET7. This table explores the base group NJ2304; 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
“NJ2304” across 4 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 2304 ECP20 × 52 × 21 mm | FAGNJ2304-E-XL-M120 × 52 × 21 mm | NSKNJ2304M20 × 52 × 21 mm | KOYONJ230420 × 52 × 21 mm |
|---|---|---|---|---|
| Comparable specifications | ||||
| Brand | SKF | FAG | NSK | KOYO |
| Designation | NJ 2304 ECP | NJ2304-E-XL-M1 | NJ2304M | NJ2304 |
| 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 | Cylindrical roller bearings |
| Series | — | NJ2304 | — | — |
| Bore diameterd | 20 mm | 20 mm | 20 mm | 20 mm |
| Outside diameterD | 52 mm | 52 mm | 52 mm | 52 mm |
| WidthB | 21 mm | 21 mm | 21 mm | 21 mm |
| Basic dynamic load ratingC | 47.5 kN | 49.5 kN | 40.5 kN | 38 kN |
| Basic static load ratingC0 | 38 kN | 39 kN | 30 kN | 30.2 kN |
| Fatigue load limitPu | 4.8 kN | 6.3 kN | — | 3.6 kN |
| Reference speednref | 15000 r/min | 9700 r/min | — | — |
| Limiting speednG | 18000 r/min | 25500 r/min | — | 11000 r/min |
| Mass≈m | 0.217 kg | 0.23704 kg | — | 0.219 kg |
| Precision class | — | PN — Normal (ISO 492:2023) | — | — |
| Internal clearance | CN | CN (Group N) — Normal internal clearance | — | — |
| Sealing | Without | — | — | — |
| Cage | Non-metallic | M1 — Two Piece Brass Cage Roller Guided | Machined brass | — |
| Lubricant | None | — | — | — |
| Minimum operating temperatureTmin | — | -30 °C | — | — |
| Maximum operating temperatureTmax | — | 150 °C | — | — |
| Additional information | ||||
| L-washer | — | HJ2304-E | — | — |
| Boundary dimensions | ||||
| Bearing widthB | — | — | 21 mm | — |
| Minimum bearing chamferr min. | — | — | 1.1 mm | — |
| Minimum secondary bearing chamferr1 min. | — | — | 0.6 mm | — |
| Roller inscribed circle diameterFw | — | — | 28.5 mm | — |
| 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 | — | — | 0.217 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 | — |
| Dimensions | ||||
| Minimum chamfer dimensionrmin | — | 1.1 mm | — | — |
| Minimum chamfer dimensionrmin | — | 0.043 in | — | — |
| Minimum chamfer dimensionr1 min | — | 0.6 mm | — | — |
| Minimum chamfer dimensionr1 min | — | 0.024 in | — | — |
| Axial displacements | — | 1.9 mm | — | — |
| Axial displacements | — | 0.075 in | — | — |
| Raceway diameter outer ringE | — | 45.5 mm | — | — |
| Raceway diameter outer ringE | — | 1.791 in | — | — |
| Raceway diameter inner ringF | — | 27.5 mm | — | — |
| Raceway diameter inner ringF | — | 1.083 in | — | — |
| Minimum rib diameter outer ringD1 min | — | 42.35 mm | — | — |
| Minimum rib diameter outer ringD1 min | — | 1.667 in | — | — |
| Maximum rib diameter inner ringd1 | — | 31.25 mm | — | — |
| Maximum rib diameter inner ringd1 | — | 1.23 in | — | — |
| Engineering — Abutment dimensions | ||||
| Diameter of spacer sleeved a | max. 26.2 mm | — | — | — |
| Diameter of shaft abutmentd b | min. 33 mm | — | — | — |
| Diameter of housing abutmentD a | max. 45.4 mm | — | — | — |
| Radius of filletr a | max. 1 mm | — | — | — |
| Engineering — Calculation data | ||||
| SKF performance class | SKF Explorer | — | — | — |
| Minimum load factork r | 0.25 | — | — | — |
| Limiting valuee | 0.3 | — | — | — |
| Calculation factorY | 0.4 | — | — | — |
| Engineering — Dimensions | ||||
| Shoulder diameter of inner ringd 1 | ≈ 31.2 mm | — | — | — |
| Shoulder diameter of outer ringD 1 | ≈ 41.85 mm | — | — | — |
| Raceway diameter of inner ringF | 27.5 mm | — | — | — |
| Chamfer dimensionr 1,2 | min. 1.1 mm | — | — | — |
| Chamfer dimensionr 3,4 | min. 0.6 mm | — | — | — |
| Permissible axial displacements | max. 1.9 mm | — | — | — |
| Load ratings — standard cage | ||||
| Basic dynamic radial load ratingCr | — | — | 40500 N | — |
| Basic static radial load ratingC0r | — | — | 30000 N | — |
| Logistics | ||||
| Product net weight | 0.217 kg | — | — | — |
| eClass code | 23-05-09-01 | — | — | — |
| UNSPSC code | 31171505 | — | — | — |
| Lubrication-qualified speed — standard cage | ||||
| Thermal speed rating — oil bath | — | — | 14000 r/min | — |
| Mechanical limiting speed — forced oil circulation | — | — | Not stated in this catalogue row | — |
| Limiting speed — grease | — | — | 11000 r/min | — |
| Limiting speed — oil bath | — | — | 14000 r/min | — |
| Main Dimensions & Performance Data | ||||
| Basic dynamic load rating, radialCr | — | 49,500 N | — | — |
| Basic dynamic load rating, radialCr | — | 11,128.597 lbf | — | — |
| Basic static load rating, radialC0r | — | 39,000 N | — | — |
| Basic static load rating, radialC0r | — | 8,767.986 lbf | — | — |
| Fatigue load limit, radialCur | — | 6,300 N | — | — |
| Fatigue load limit, radialCur | — | 1,416.367 lbf | — | — |
| Manufacturer Identity | ||||
| Schaeffler Product Code | — | 371337 | — | — |
| Official Class Key | — | — | — | 040-010-000 |
| Base Type | — | NJ2304 | — | — |
| Old Designation | — | ["NJ2304E.M1","NJ2304-E-M1"] | — | — |
| Gpsd Group | — | F01 | — | — |
| Product Line Id | — | 12 | — | — |
| X Life Marking | — | XL | — | — |
| SAP material number | — | 0384536490000 | — | — |
| Base product | — | 2305090111 | — | — |
| Bearing X designation | — | NJ2304-E-XL-M1 | — | — |
| Mounting Manager ID | — | NJ2304-E-XL-M1 | — | — |
| Grease application ID | — | NJ2304-E-XL-M1 | — | — |
| Mounting dimensions | ||||
| Minimum diameter shaft shoulderda min | — | 24 mm | — | — |
| Minimum diameter shaft shoulderda min | — | 0.945 in | — | — |
| Maximum diameter of shaft shoulderda max | — | 27 mm | — | — |
| Maximum diameter of shaft shoulderda max | — | 1.063 in | — | — |
| Maximum diameter of housing shoulderDa max | — | 45 mm | — | — |
| Maximum diameter of housing shoulderDa max | — | 1.772 in | — | — |
| Minimum shaft shoulderdc min | — | 33 mm | — | — |
| Minimum shaft shoulderdc min | — | 1.299 in | — | — |
| Maximum recess radiusra max | — | 1 mm | — | — |
| Maximum recess radiusra max | — | 0.039 in | — | — |
| Mounting dimensions — shown arrangement | ||||
| Minimum shaft shoulder diameterdb min. | — | — | 24 mm | — |
| Maximum housing shoulder diameterDa max. | — | — | 45.5 mm | — |
| Maximum adjusting-ring diameter (NU/NJ arrangement)db max. | — | — | 27 mm | — |
| Maximum adjacent fillet radiusra max. | — | — | 1 mm | — |
| Maximum secondary adjacent fillet radiusrb max. | — | — | 0.6 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 | — | — |
| Short Description | — | Cylindrical roller bearing | — | — |
| 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 | — | — | — |
| Indicative carbon footprint for new product | 0.8 kg CO 2 e | — | — | — |
| Technical Data | ||||
| d | — | — | — | 52 mm |
| B | — | — | — | 21 mm |
| R(Min.) | — | — | — | 1.1 mm |
| R1(Min.) | — | — | — | 0.6 mm |
| Bore Diameter (D) | — | 20 mm | — | — |
| Fw | — | — | — | 28.5 mm |
| Outside Diamater (D) | — | 52 mm | — | — |
| Ew | — | — | — | - mm |
| Total Width (B) | — | 21 mm | — | — |
| Basic Load Ratings : Cr | — | — | — | 38.0 kN |
| Basic Dynamic Load Rating, Radial (Cr) | — | 49,500 N | — | — |
| Basic Load Ratings : C0R | — | — | — | 30.2 kN |
| Basic Static Load Rating, Radial (C0R) | — | 39,000 N | — | — |
| Fatigue Load Limit : Cu | — | — | — | 3.60 kN |
| Raceway Diameter Inner Ring (F) | — | 27.5 mm | — | — |
| Limiting Speeds(Grease Lub.) | — | — | — | 11000 min-1 |
| Operating Temperature Min. (Tmin) | — | -30 °C | — | — |
| Limiting Speeds(Oil Lub.) | — | — | — | 16000 min-1 |
| Minimum Diameter Shaft Shoulder (Da) | — | 24 mm | — | — |
| Sd1 | — | — | — | - mm |
| Operating Temperature Max. (Tmax) | — | 150 °C | — | — |
| B1 | — | — | — | - mm |
| Limiting Speed (Limiting Spe) | — | 25,500 1/min | — | — |
| B2 | — | — | — | - mm |
| Minimum Shaft Shoulder (Dc Min) | — | 33 mm | — | — |
| Da(Min.) | — | — | — | - mm |
| Reference Speed (Nϑr) | — | 9,700 1/min | — | — |
| Db(Min.) | — | — | — | - mm |
| Maximum Recess Radius (Ra Max) | — | 1 mm | — | — |
| Db(Max.) | — | — | — | - mm |
| Maximum Diameter Of Housing Shoulder (Da) | — | 45 mm | — | — |
| Dc(Min.) | — | — | — | - mm |
| Maximum Rib Diameter Inner Ring (D1) | — | 31.25 mm | — | — |
| Dd(Min.) | — | — | — | - mm |
| Minimum Chamfer Dimension (R1 Min) | — | 0.6 mm | — | — |
| Da(Max.) | — | — | — | 45.5 mm |
| Axial Displacement (S) | — | 1.9 mm | — | — |
| Minimum Rib Diameter Outer Ring (D1 Min) | — | 42.35 mm | — | — |
| Maximum Diameter Of Shaft Shoulder (Da Max) | — | 27 mm | — | — |
| Ra(Max.) | — | — | — | 1 mm |
| Minimum Chamfer Dimension (Rmin) | — | 1.1 mm | — | — |
| Rb(Max.) | — | — | — | 0.6 mm |
| Raceway Diameter Outer Ring (E) | — | 45.5 mm | — | — |
| Mass(Refer.) | — | — | — | 0.219 kg |
| Fatigue Load Limit, Radial (Cur) | — | 6,300 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 | — | — |
Automatic matching is a search aid, not an interchangeability declaration. Confirm the full suffix, tolerances, internal design and application limits before substitution.