Cross-brand designation analysis
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You entered QJ-304-MA. This table explores the base group QJ304; it does not preserve or approve every requested suffix. Search your complete marking first →
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“QJ304” across 2 loaded brands
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Technical comparison
Choose exact variants instead →Brand differences at a glance
| Parameter | SKFQJ 304 MA20 × 52 × 15 mm | FAGQJ304-XL-MPA20 × 52 × 15 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | SKF | FAG |
| Designation | QJ 304 MA | QJ304-XL-MPA |
| Product family | Angular contact ball bearings | — |
| Detailed type | Four-point contact ball bearing | Four-point contact bearing |
| Series | — | QJ304 |
| Bore diameterd | 20 mm | 20 mm |
| Outside diameterD | 52 mm | 52 mm |
| WidthB | 15 mm | 15 mm |
| Basic dynamic load ratingC | 32 kN | 31 kN |
| Basic static load ratingC0 | 21.6 kN | 19.6 kN |
| Fatigue load limitPu | 0.93 kN | 1.36 kN |
| Reference speednref | — | 10700 r/min |
| Limiting speednG | 24000 r/min | 28500 r/min |
| Mass≈m | 0.177 kg | 0.175 kg |
| Precision class | — | PN — Normal (ISO 492:2023) |
| Sealing | Without | — |
| Cage | Machined brass | MPA — Solid brass cage, outer ring guided |
| Bearing material | Bearing steel | — |
| Lubricant | None | — |
| Minimum operating temperatureTmin | — | -30 °C |
| Maximum operating temperatureTmax | — | 150 °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 |
| Dimensions | ||
| Contact angle | 35.0 ° | — |
| Minimum chamfer dimensionrmin | — | 1.1 mm |
| Minimum chamfer dimensionrmin | — | 0.043 in |
| Shoulder diameter outer ringD1 | — | 41.38 mm |
| Shoulder diameter outer ringD1 | — | 1.629 in |
| Shoulder diameter inner ringd1 | — | 30.62 mm |
| Shoulder diameter inner ringd1 | — | 1.206 in |
| Distance between the apexes of the pressure conesa | — | 25.2 mm |
| Distance between the apexes of the pressure conesa | — | 0.992 in |
| Contact angleα | — | 35 ° |
| 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 factorA | 0.001 | — |
| Limiting valuee | 0.95 | — |
| Calculation factorX | 0.6 | — |
| Calculation factorY 0 | 0.58 | — |
| Calculation factorY 1 | 0.66 | — |
| Calculation factorY 2 | 1.1 | — |
| Engineering — Dimensions | ||
| Shoulder diameter inner ringd 1 | ≈ 27.8 mm | — |
| Shoulder diameter outer ring/ inner diameter housing washerD 1 | ≈ 40.8 mm | — |
| Distance pressure point(s)a | 25 mm | — |
| Chamfer dimension inner ringr 1,2 | min. 1.1 mm | — |
| Logistics | ||
| Product net weight | 0.177 kg | — |
| eClass code | 23-05-08-05 | — |
| UNSPSC code | 31171538 | — |
| Main Dimensions & Performance Data | ||
| Basic dynamic load rating, radialCr | — | 31,000 N |
| Basic dynamic load rating, radialCr | — | 6,969.424 lbf |
| Basic static load rating, radialC0r | — | 19,600 N |
| Basic static load rating, radialC0r | — | 4,406.475 lbf |
| Fatigue load limit, radialCur | — | 1,360 N |
| Fatigue load limit, radialCur | — | 305.755 lbf |
| Manufacturer Identity | ||
| Schaeffler Product Code | — | 366796 |
| Base Type | — | QJ304 |
| Old Designation | — | ["QJ304-MPA"] |
| Gpsd Group | — | S03 |
| Product Line Id | — | 14 |
| X Life Marking | — | XL |
| SAP material number | — | 0192615940000 |
| Base product | — | 230508AD41 |
| Bearing X designation | — | QJ304-XL-MPA |
| Mounting Manager ID | — | QJ304-XL-MPA |
| Grease application ID | — | QJ304-XL-MPA |
| 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 | ||
| Tolerance classPN | — | Normal (ISO 492:2023) |
| Dimensional / heat stabilizationS0 | — | Rings dimensional stabilized up to 150° |
| 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/four-point-contact-ball-bearings | — |
| Structure group ID | BAQ_001 | — |
| Available from SKF | Yes | — |
| Remanufacturable | No | — |
| Product Identity | ||
| Construction | — | Four point contact bearing QJ3..-XL-MPA, X-life, solid brass cage |
| Short Description | — | Four-point contact bearing |
| Properties | ||
| Contact type | Four-point contact | — |
| Number of rows | 1 | — |
| Locating feature, bearing outer ring | Without | — |
| Ring type | Two-piece inner ring and one-piece outer ring | — |
| 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 | 0.66 kg CO 2 e | — |
| Technical Data | ||
| Bore Diameter (D) | — | 20 mm |
| Outside Diameter (D) | — | 52 mm |
| Width (B) | — | 15 mm |
| Basic Dynamic Load Rating, Radial (Cr) | — | 31,000 N |
| Basic Static Load Rating, Radial (C0R) | — | 19,600 N |
| Operating Temperature Min. (Tmin) | — | -30 °C |
| Limiting Speed (Ng) | — | 28,500 1/min |
| Operating Temperature Max. (Tmax) | — | 150 °C |
| Reference Speed (Nϑr) | — | 10,700 1/min |
| Fatigue Load Limit, Radial (Cur) | — | 1,360 N |
| Minimum Diameter Shaft Shoulder (Da Min) | — | 27 mm |
| Shoulder Diameter Inner Ring (D1) | — | 30.62 mm |
| Maximum Diameter Of Housing Shoulder (Da Max) | — | 45 mm |
| Minimum Chamfer Dimension (Rmin) | — | 1.1 mm |
| Maximum Fillet Radius (Ra Max) | — | 1 mm |
| Shoulder Diameter Outer Ring (D1) | — | 41.38 mm |
| Contact Angle (Α) | — | 35 ° |
| Distance Between The Apexes Of The Pressure Cones (A) | — | 25.2 mm |
| 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.