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| Parameter | SKF2304 M20 × 52 × 21 mm | FAG2304-2RS-TVH20 × 52 × 21 mm | NSK230420 × 52 × 21 mm | KOYO230420 × 52 × 21 mm |
|---|---|---|---|---|
| Comparable specifications | ||||
| Brand | SKF | FAG | NSK | KOYO |
| Designation | 2304 M | 2304-2RS-TVH | 2304 | 2304 |
| Product family | Self-aligning ball bearings | — | Self-aligning ball bearing | Open type |
| Detailed type | Self-aligning ball bearings | Self-aligning ball bearings | Self-aligning ball bearings | Self-aligning ball bearings |
| Series | — | 2304 | — | — |
| 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 | 18.2 kN | 12.7 kN | 20.3 kN | 22.5 kN |
| Basic static load ratingC0 | 4.75 kN | 3.35 kN | 4.7 kN | 4.65 kN |
| Fatigue load limitPu | 0.24 kN | 0.212 kN | — | 0.3 kN |
| Reference speednref | 26000 r/min | — | — | — |
| Limiting speednG | 19000 r/min | 9400 r/min | — | 11000 r/min |
| Mass≈m | 0.227 kg | 0.212 kg | 0.21 kg | 0.209 kg |
| Precision class | — | PN — Normal (ISO 492:2023) | — | — |
| Internal clearance | CN | CN (Group N) — Normal internal clearance | — | — |
| Sealing | Without | 2RS — Contact seal on both sides | — | Open |
| Cage | Machined brass | TVH — Solid cage made of glass-fiber reinforced polyamide PA66 | — | — |
| Bearing material | Bearing steel | — | — | — |
| Lubricant | None | GA14 — Ball bearing grease, low noise | — | — |
| Minimum operating temperatureTmin | — | -20 °C | — | — |
| Maximum operating temperatureTmax | — | 100 °C | — | — |
| Boundary dimensions | ||||
| Bearing widthB | — | — | 21 mm | — |
| Minimum bearing chamferr min. | — | — | 1.1 mm | — |
| Calculation factors | ||||
| Limiting value of Fa/Fr for the applicability of diff. Values of factors X and Ye | — | 0.29 | — | — |
| Dynamic axial load factorY1 | — | 2.16 | — | — |
| Dynamic axial load factorY2 | — | 3.34 | — | — |
| Static axial load factorY0 | — | 2.26 | 1.3 | — |
| Capabilities & suitability | ||||
| Radial load capacity | — | Yes | — | — |
| Axial load capacity in one direction | — | Yes | — | — |
| Axial load capacity in both directions | — | Yes | — | — |
| Lifetimelubricationfreedomfrommaintenance | — | Yes | — | — |
| Suitable for grease lubrication | — | Yes | — | — |
| Sealedonbothsides | — | Yes | — | — |
| Staticangularerrorandmisalignment | — | Yes | — | — |
| Dynamicangularerrorandmisalignment | — | Yes | — | — |
| Classification | ||||
| Official Category Path | — | — | — | Self-aligning ball bearings - Open type |
| Official Classification 1 | — | — | — | Self-aligning ball bearings / Open type |
| Construction | ||||
| Bore construction | — | — | Cylindrical bore | — |
| Dimensions | ||||
| Minimum chamfer dimensionrmin | — | 1.1 mm | — | — |
| Minimum chamfer dimensionrmin | — | 0.043 in | — | — |
| Shoulder diameter outer ringD1 | — | 41.59 mm | — | — |
| Shoulder diameter outer ringD1 | — | 1.637 in | — | — |
| Caliber diameter outer ringD2 | — | 44.37 mm | — | — |
| Caliber diameter outer ringD2 | — | 1.747 in | — | — |
| Shoulder diameter inner ringd1 | — | 31.5 mm | — | — |
| Shoulder diameter inner ringd1 | — | 1.24 in | — | — |
| Caliber diameter inner ringd2 | — | 27.2 mm | — | — |
| Caliber diameter inner ringd2 | — | 1.071 in | — | — |
| Engineering — Abutment dimensions | ||||
| Abutment diameter shaftd a | min. 27 mm | — | — | — |
| Abutment diameter housingD a | max. 45 mm | — | — | — |
| Fillet radiusr a | max. 1.1 mm | — | — | — |
| Engineering — Calculation data | ||||
| Permissible angular misalignmentα | 3 ° | — | — | — |
| Calculation factork r | 0.05 | — | — | — |
| Limiting valuee | 0.52 | — | — | — |
| Calculation factorY 0 | 1.3 | — | — | — |
| Calculation factorY 1 | 1.2 | — | — | — |
| Calculation factorY 2 | 1.9 | — | — | — |
| Engineering — Dimensions | ||||
| Shoulder diameter inner ringd 1 | ≈ 29.15 mm | — | — | — |
| Shoulder diameter outer ringD 1 | ≈ 41.624 mm | — | — | — |
| Chamfer dimensionr 1,2 | min. 1.1 mm | — | — | — |
| Engineering — Engineering specifications | ||||
| Bore type | Cylindrical | — | — | — |
| Equivalent-load factors | ||||
| Dynamic load ratio thresholde | — | — | 0.5 | — |
| Dynamic axial factor above thresholdY2 | — | — | 1.9 | — |
| Dynamic axial factor at or below thresholdY3 | — | — | 1.2 | — |
| Load ratings | ||||
| Basic dynamic radial load ratingCr | — | — | 20300 N | — |
| Basic static radial load ratingC0r | — | — | 4700 N | — |
| Logistics | ||||
| Product net weight | 0.227 kg | — | — | — |
| eClass code | 23-05-08-06 | — | — | — |
| UNSPSC code | 31171532 | — | — | — |
| Lubrication-qualified speed | ||||
| Limiting speed with grease | — | — | 11000 r/min | — |
| Limiting speed with oil | — | — | 14000 r/min | — |
| Main Dimensions & Performance Data | ||||
| Basic dynamic load rating, radialCr | — | 12,700 N | — | — |
| Basic dynamic load rating, radialCr | — | 2,855.216 lbf | — | — |
| Basic static load rating, radialC0r | — | 3,350 N | — | — |
| Basic static load rating, radialC0r | — | 753.147 lbf | — | — |
| Fatigue load limit, radialCur | — | 212 N | — | — |
| Fatigue load limit, radialCur | — | 47.662 lbf | — | — |
| Manufacturer Identity | ||||
| Schaeffler Product Code | — | 366162 | — | — |
| Official Class Key | — | — | — | 030-010-000 |
| Base Type | — | 2304 | — | — |
| Old Designation | — | ["2304.2RS.TV"] | — | — |
| Gpsd Group | — | S03 | — | — |
| Product Line Id | — | 14 | — | — |
| X Life Marking | — | n.r. | — | — |
| SAP material number | — | 0167068540000 | — | — |
| Base product | — | 2305080601 | — | — |
| Bearing X designation | — | 2304-2RS-TVH | — | — |
| Mounting Manager ID | — | 2304-2RS-TVH | — | — |
| Grease application ID | — | 2304-2RS-TVH | — | — |
| Mounting dimensions | ||||
| Minimum shaft shoulder diameterda min. | — | — | 26.5 mm | — |
| Maximum housing shoulder diameterDa max. | — | — | 45.5 mm | — |
| Maximum adjacent fillet radiusra max. | — | — | 1 mm | — |
| Minimum diameter shaft shoulderda min | — | 27 mm | — | — |
| Minimum diameter shaft shoulderda min | — | 1.063 in | — | — |
| Maximum diameter of housing shoulderDa max | — | 45 mm | — | — |
| Maximum diameter of housing shoulderDa max | — | 1.772 in | — | — |
| Maximum fillet radiusra max | — | 1 mm | — | — |
| Maximum fillet radiusra max | — | 0.039 in | — | — |
| Product characteristics | ||||
| Bore typeZ | — | Cylindrical | — | — |
| Type of Seal2RS | — | Contact seal on both sides | — | — |
| Tolerance classPN | — | Normal (ISO 492:2023) | — | — |
| Radial internal clearanceCN (Group N) | — | Normal internal clearance | — | — |
| Product identity | ||||
| Official product category | Self-aligning ball bearings | — | — | — |
| Official taxonomy path | /products/rolling-bearings/ball-bearings/self-aligning-ball-bearings | — | — | — |
| Structure group ID | BJ1_001 | — | — | — |
| Available from SKF | Yes | — | — | — |
| Remanufacturable | No | — | — | — |
| Product Identity | ||||
| Construction | — | Self-aligning ball bearing 23..-2RS-TVH, seals, plastic cage | — | — |
| Short Description | — | Self-aligning ball bearing | — | — |
| Properties | ||||
| Retaining feature, inner ring | None | — | — | — |
| Locating feature, bearing outer ring | Without | — | — | — |
| Number of rows | 2 | — | — | — |
| Radial internal clearance | CN | — | — | — |
| Tolerance class | Normal | — | — | — |
| Material, bearing | Bearing steel | — | — | — |
| Coating | Without | — | — | — |
| Relubrication feature | Without | — | — | — |
| Indicative carbon footprint for new product | 0.84 kg CO 2 e | — | — | — |
| Reference mass | ||||
| Approximate catalogue mass | — | — | 0.21 kg | — |
| Technical Data | ||||
| d | — | — | — | 52 mm |
| B | — | — | — | 21 mm |
| R(Min.) | — | — | — | 1.1 mm |
| Basic Load Ratings : Cr | — | — | — | 22.5 kN |
| Basic Load Ratings : C0R | — | — | — | 4.65 kN |
| Bore Diameter (D) | — | 20 mm | — | — |
| Fatigue Load Limit : Cu | — | — | — | 0.30 kN |
| Outside Diameter (D) | — | 52 mm | — | — |
| Limiting Speeds(Grease Lub.) | — | — | — | 11000 min-1 |
| Width (B) | — | 21 mm | — | — |
| Limiting Speeds(Oil Lub.) | — | — | — | 15000 min-1 |
| Basic Dynamic Load Rating, Radial (Cr) | — | 12,700 N | — | — |
| Constant :E | — | — | — | 0.49 |
| Basic Static Load Rating, Radial (C0R) | — | 3,350 N | — | — |
| Axial Load Factors : Y1 | — | — | — | 1.29 |
| Operating Temperature Min. (Tmin) | — | -20 °C | — | — |
| Axial Load Factors : Y2 | — | — | — | 2.00 |
| Limiting Speed (Ng) | — | 9,400 1/min | — | — |
| Axial Load Factors : Y0 | — | — | — | 1.35 |
| Operating Temperature Max. (Tmax) | — | 100 °C | — | — |
| Da(Min.) | — | — | — | 26.5 mm |
| Fatigue Load Limit, Radial (Cur) | — | 212 N | — | — |
| Da(Max.) | — | — | — | 45.5 mm |
| Limiting Value Of Fa/Fr For The Applicability Of Diff. Values Of Factors X And Y (E) | — | 0.29 | — | — |
| Ra(Max.) | — | — | — | 1 mm |
| Minimum Diameter Shaft Shoulder (Da Min) | — | 27 mm | — | — |
| Mass(Refer.) | — | — | — | 0.209 kg |
| Shoulder Diameter Inner Ring (D1) | — | 31.5 mm | — | — |
| Dynamic Axial Load Factor (Y1) | — | 2.16 | — | — |
| Maximum Diameter Of Housing Shoulder (Da Max) | — | 45 mm | — | — |
| Minimum Chamfer Dimension (Rmin) | — | 1.1 mm | — | — |
| Caliber Diameter Inner Ring (D1) | — | 27.2 mm | — | — |
| Maximum Fillet Radius (Ra Max) | — | 1 mm | — | — |
| Shoulder Diameter Outer Ring (D1) | — | 41.59 mm | — | — |
| Dynamic Axial Load Factor (Y2) | — | 3.34 | — | — |
| Caliber Diameter Outer Ring (D1) | — | 44.37 mm | — | — |
| Static Axial Load Factor (Y0) | — | 2.26 | — | — |
| Temperature range | ||||
| Operating temperature min.Tmin | — | -20 °C | — | — |
| Operating temperature min.Tmin | — | -4 °F | — | — |
| Operating temperature max.Tmax | — | 100 °C | — | — |
| Operating temperature max.Tmax | — | 212 °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.