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| Parameter | SKF3304 A20 × 52 × 22.2 mm | FAG3304-BD-XL20 × 52 × 22.2 mm | KOYO330420 × 52 × 22.2 mm |
|---|---|---|---|
| Comparable specifications | |||
| Brand | SKF | FAG | KOYO |
| Designation | 3304 A | 3304-BD-XL | 3304 |
| Product family | Angular contact ball bearings | — | Double-row / Open |
| Detailed type | Double row angular contact ball bearing | Angular contact ball bearings | Angular contact ball bearings |
| Series | — | 3304 | — |
| Bore diameterd | 20 mm | 20 mm | 20 mm |
| Outside diameterD | 52 mm | 52 mm | 52 mm |
| WidthB | 22.2 mm | 22.2 mm | 22.2 mm |
| Basic dynamic load ratingC | 24.5 kN | 24.6 kN | 26 kN |
| Basic static load ratingC0 | 15.6 kN | 15.9 kN | 18.4 kN |
| Fatigue load limitPu | 0.67 kN | 1.1 kN | 0.95 kN |
| Reference speednref | 13000 r/min | 10400 r/min | — |
| Limiting speednG | 13000 r/min | 14700 r/min | 8200 r/min |
| Mass≈m | 0.221 kg | 0.211 kg | 0.23 kg |
| Precision class | — | P6 — Class 6 (ISO 492:2023) | — |
| Sealing | Without | Without — Not sealed | Open |
| Cage | Sheet metal | JH — Steel sheet metal | — |
| Bearing material | Bearing steel | — | — |
| Lubricant | None | Without — Bearing not greased | — |
| Minimum operating temperatureTmin | — | -30 °C | — |
| Maximum operating temperatureTmax | — | 120 °C | — |
| Capabilities & suitability | |||
| Radial load capacity | — | Yes | — |
| Axial load capacity in one direction | — | Yes | — |
| Axial load capacity in both directions | — | Yes | — |
| Suitable for grease lubrication | — | Yes | — |
| Suitable for oil lubrication | — | Yes | — |
| Unsealed design | — | Yes | — |
| Classification | |||
| Official Category Path | — | — | Angular contact ball bearings - Double-row - Open |
| Official Classification 1 | — | — | Angular contact ball bearings / Double-row / Open |
| Dimensions | |||
| Contact angle | 30.0 ° | — | — |
| Minimum chamfer dimensionrmin | — | 1.1 mm | — |
| Minimum chamfer dimensionrmin | — | 0.043 in | — |
| Shoulder diameter outer ringD1 | — | 43.98 mm | — |
| Shoulder diameter outer ringD1 | — | 1.731 in | — |
| Caliber diameter outer ringD2 | — | 46.14 mm | — |
| Caliber diameter outer ringD2 | — | 1.817 in | — |
| Shoulder diameter inner ringd1 | — | 33.52 mm | — |
| Shoulder diameter inner ringd1 | — | 1.32 in | — |
| Caliber diamter inner ringd2 | — | 31.94 mm | — |
| Caliber diamter inner ringd2 | — | 1.257 in | — |
| Distance between the apexes of the pressure conesa | — | 30.4 mm | — |
| Distance between the apexes of the pressure conesa | — | 1.197 in | — |
| Contact angleα | — | 30 ° | — |
| Engineering — Abutment dimensions | |||
| Abutment diameter shaftd a | min. 27 mm | — | — |
| Abutment diameter housingD a | max. 45 mm | — | — |
| Fillet radiusr a | max. 1 mm | — | — |
| Engineering — Calculation data | |||
| SKF performance class | SKF Explorer | — | — |
| Calculation factork r | 0.07 | — | — |
| Limiting valuee | 0.8 | — | — |
| Calculation factorX | 0.63 | — | — |
| Calculation factorY 0 | 0.66 | — | — |
| Calculation factorY 1 | 0.78 | — | — |
| Calculation factorY 2 | 1.2 | — | — |
| Engineering — Dimensions | |||
| Recess diameter inner ring shoulderd 2 | ≈ 29.9 mm | — | — |
| Recess diameter outer ring shoulderD 2 | ≈ 43.95 mm | — | — |
| Chamfer dimension inner ringr 1,2 | min. 1.1 mm | — | — |
| Distance pressure point(s)a | 30 mm | — | — |
| Logistics | |||
| Product net weight | 0.221 kg | — | — |
| eClass code | 23-05-08-03 | — | — |
| UNSPSC code | 31171531 | — | — |
| Main Dimensions & Performance Data | |||
| Basic dynamic load rating, radialCr | — | 24,600 N | — |
| Basic dynamic load rating, radialCr | — | 5,530.576 lbf | — |
| Basic static load rating, radialC0r | — | 15,900 N | — |
| Basic static load rating, radialC0r | — | 3,574.64 lbf | — |
| Fatigue load limit, radialCur | — | 1,100 N | — |
| Fatigue load limit, radialCur | — | 247.302 lbf | — |
| Manufacturer Identity | |||
| Schaeffler Product Code | — | 360836 | — |
| Official Class Key | — | — | 020-030-000 |
| Base Type | — | 3304 | — |
| Old Designation | — | ["3304-BD"] | — |
| Gpsd Group | — | S03 | — |
| Product Line Id | — | 14 | — |
| X Life Marking | — | XL | — |
| SAP material number | — | 0712339200000 | — |
| Base product | — | 2305080302 | — |
| Bearing X designation | — | 3304-BD-XL | — |
| Mounting Manager ID | — | 3304-BD-XL | — |
| Grease application ID | — | 3304-BD-XL | — |
| Mounting dimensions | |||
| 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 | |||
| Design variantB | — | Bearing without filling slot | — |
| Changed internal design | — | D | — |
| Type of SealWithout | — | Not sealed | — |
| Tolerance classP6 | — | Class 6 (ISO 492:2023) | — |
| Dimensional / heat stabilizationSN | — | Rings dimensional stabilized up to 120° | — |
| Axial internal clearanceCN | — | Group N (CN) | — |
| Product identity | |||
| Official product category | Angular contact ball bearings | — | — |
| Official taxonomy path | /products/rolling-bearings/ball-bearings/angular-contact-ball-bearings/double-row-angular-contact-ball-bearings | — | — |
| Structure group ID | BA2_001 | — | — |
| Available from SKF | Yes | — | — |
| Remanufacturable | No | — | — |
| Product Identity | |||
| Construction | — | Angular contact ball bearing 33..-BD-XL, double row, X-life, steel sheet metal cage | — |
| Short Description | — | Angular contact ball bearing | — |
| Properties | |||
| Contact type | Normal contact (two-point contact) | — | — |
| Number of rows | 2 | — | — |
| Locating feature, bearing outer ring | Without | — | — |
| Ring type | One-piece inner and outer rings | — | — |
| Arrangement of contact angle (double-row bearing) | Back-to-back (O) | — | — |
| Matched arrangement | No | — | — |
| Universal matching bearing | No | — | — |
| Axial internal clearance | CN | — | — |
| Material, bearing | Bearing steel | — | — |
| Coating | Without | — | — |
| Relubrication feature | Without | — | — |
| Indicative carbon footprint for new product | 0.82 kg CO 2 e | — | — |
| Technical Data | |||
| d | — | — | 52 mm |
| B | — | — | 22.2 mm |
| R(Min.) | — | — | 1.1 mm |
| Basic Load Ratings : Cr | — | — | 26.0 kN |
| Bore Diameter (D) | — | 20 mm | — |
| Basic Load Ratings : C0R | — | — | 18.4 kN |
| Outside Diameter (D) | — | 52 mm | — |
| Fatigue Load Limit : Cu | — | — | 0.950 kN |
| Width (B) | — | 22.2 mm | — |
| Limiting Speeds(Grease Lub.) | — | — | 8200 min-1 |
| Basic Dynamic Load Rating, Radial (Cr) | — | 24,600 N | — |
| Limiting Speeds(Oil Lub.) | — | — | 11000 min-1 |
| Basic Static Load Rating, Radial (C0R) | — | 15,900 N | — |
| Load Center Spread : A | — | — | 33.8 mm |
| Operating Temperature Min. (Tmin) | — | -30 °C | — |
| Da(Min.) | — | — | 27 mm |
| Limiting Speed (Ng) | — | 14,700 1/min | — |
| Da(Max.) | — | — | 45 mm |
| Operating Temperature Max. (Tmax) | — | 120 °C | — |
| Reference Speed (Nϑr) | — | 10,400 1/min | — |
| Ra(Max.) | — | — | 1 mm |
| Caliber Diameter Outer Ring (D2) | — | 46.14 mm | — |
| Mass(Refer.) | — | — | 0.230 kg |
| Fatigue Load Limit, Radial (Cur) | — | 1,100 N | — |
| Minimum Diameter Shaft Shoulder (Da Min) | — | 27 mm | — |
| Shoulder Diameter Inner Ring (D1) | — | 33.52 mm | — |
| Maximum Diameter Of Housing Shoulder (Da Max) | — | 45 mm | — |
| Minimum Chamfer Dimension (Rmin) | — | 1.1 mm | — |
| Caliber Diameter Inner Ring (D1) | — | 31.94 mm | — |
| Maximum Fillet Radius (Ra Max) | — | 1 mm | — |
| Shoulder Diameter Outer Ring (D1) | — | 43.98 mm | — |
| Contact Angle (Α) | — | 30 ° | — |
| Distance Between The Apexes Of The Pressure Cones (A) | — | 30.4 mm | — |
| Temperature range | |||
| Operating temperature min.Tmin | — | -30 °C | — |
| Operating temperature min.Tmin | — | -22 °F | — |
| Operating temperature max.Tmax | — | 120 °C | — |
| Operating temperature max.Tmax | — | 248 °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.