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| Parameter | SKF3308 A40 × 90 × 36.5 mm | FAG3308-BD-XL40 × 90 × 36.5 mm | KOYO330840 × 90 × 36.5 mm |
|---|---|---|---|
| Comparable specifications | |||
| Brand | SKF | FAG | KOYO |
| Designation | 3308 A | 3308-BD-XL | 3308 |
| 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 | — | 3308 | — |
| Bore diameterd | 40 mm | 40 mm | 40 mm |
| Outside diameterD | 90 mm | 90 mm | 90 mm |
| WidthB | 36.5 mm | 36.5 mm | 36.5 mm |
| Basic dynamic load ratingC | 65.5 kN | 67 kN | 67.6 kN |
| Basic static load ratingC0 | 48 kN | 48.5 kN | 53.8 kN |
| Fatigue load limitPu | 2.04 kN | 3.35 kN | 2.8 kN |
| Reference speednref | 7500 r/min | 7000 r/min | — |
| Limiting speednG | 7500 r/min | 8000 r/min | 4600 r/min |
| Mass≈m | 0.981 kg | 0.99 kg | 1.07 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 | — | 1.5 mm | — |
| Minimum chamfer dimensionrmin | — | 0.059 in | — |
| Shoulder diameter outer ringD1 | — | 77.02 mm | — |
| Shoulder diameter outer ringD1 | — | 3.032 in | — |
| Caliber diameter outer ringD2 | — | 79.92 mm | — |
| Caliber diameter outer ringD2 | — | 3.146 in | — |
| Shoulder diameter inner ringd1 | — | 58.99 mm | — |
| Shoulder diameter inner ringd1 | — | 2.322 in | — |
| Caliber diamter inner ringd2 | — | 56.82 mm | — |
| Caliber diamter inner ringd2 | — | 2.237 in | — |
| Distance between the apexes of the pressure conesa | — | 53.1 mm | — |
| Distance between the apexes of the pressure conesa | — | 2.091 in | — |
| Contact angleα | — | 30 ° | — |
| Engineering — Abutment dimensions | |||
| Abutment diameter shaftd a | min. 49 mm | — | — |
| Abutment diameter housingD a | max. 81 mm | — | — |
| Fillet radiusr a | max. 1.5 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 | ≈ 50.8 mm | — | — |
| Recess diameter outer ring shoulderD 2 | ≈ 80.5 mm | — | — |
| Chamfer dimension inner ringr 1,2 | min. 1.5 mm | — | — |
| Distance pressure point(s)a | 53 mm | — | — |
| Logistics | |||
| Product net weight | 0.981 kg | — | — |
| eClass code | 23-05-08-03 | — | — |
| UNSPSC code | 31171531 | — | — |
| Main Dimensions & Performance Data | |||
| Basic dynamic load rating, radialCr | — | 67,000 N | — |
| Basic dynamic load rating, radialCr | — | 15,062.95 lbf | — |
| Basic static load rating, radialC0r | — | 48,500 N | — |
| Basic static load rating, radialC0r | — | 10,903.777 lbf | — |
| Fatigue load limit, radialCur | — | 3,350 N | — |
| Fatigue load limit, radialCur | — | 753.147 lbf | — |
| Manufacturer Identity | |||
| Schaeffler Product Code | — | 360849 | — |
| Official Class Key | — | — | 020-030-000 |
| Base Type | — | 3308 | — |
| Old Designation | — | ["3308-BD"] | — |
| Gpsd Group | — | S03 | — |
| Product Line Id | — | 14 | — |
| X Life Marking | — | XL | — |
| SAP material number | — | 0713244530000 | — |
| Base product | — | 2305080302 | — |
| Bearing X designation | — | 3308-BD-XL | — |
| Mounting Manager ID | — | 3308-BD-XL | — |
| Grease application ID | — | 3308-BD-XL | — |
| Mounting dimensions | |||
| Minimum diameter shaft shoulderda min | — | 49 mm | — |
| Minimum diameter shaft shoulderda min | — | 1.929 in | — |
| Maximum diameter of housing shoulderDa max | — | 81 mm | — |
| Maximum diameter of housing shoulderDa max | — | 3.189 in | — |
| Maximum fillet radiusra max | — | 1.5 mm | — |
| Maximum fillet radiusra max | — | 0.059 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 | 3.6 kg CO 2 e | — | — |
| Technical Data | |||
| d | — | — | 90 mm |
| B | — | — | 36.5 mm |
| R(Min.) | — | — | 1.5 mm |
| Basic Load Ratings : Cr | — | — | 67.6 kN |
| Bore Diameter (D) | — | 40 mm | — |
| Basic Load Ratings : C0R | — | — | 53.8 kN |
| Outside Diameter (D) | — | 90 mm | — |
| Fatigue Load Limit : Cu | — | — | 2.80 kN |
| Width (B) | — | 36.5 mm | — |
| Limiting Speeds(Grease Lub.) | — | — | 4600 min-1 |
| Basic Dynamic Load Rating, Radial (Cr) | — | 67,000 N | — |
| Limiting Speeds(Oil Lub.) | — | — | 6100 min-1 |
| Basic Static Load Rating, Radial (C0R) | — | 48,500 N | — |
| Load Center Spread : A | — | — | 58.9 mm |
| Operating Temperature Min. (Tmin) | — | -30 °C | — |
| Da(Min.) | — | — | 49 mm |
| Limiting Speed (Ng) | — | 8,000 1/min | — |
| Da(Max.) | — | — | 81.5 mm |
| Operating Temperature Max. (Tmax) | — | 120 °C | — |
| Reference Speed (Nϑr) | — | 7,000 1/min | — |
| Ra(Max.) | — | — | 1.5 mm |
| Caliber Diameter Outer Ring (D2) | — | 79.92 mm | — |
| Mass(Refer.) | — | — | 1.07 kg |
| Fatigue Load Limit, Radial (Cur) | — | 3,350 N | — |
| Minimum Diameter Shaft Shoulder (Da Min) | — | 49 mm | — |
| Shoulder Diameter Inner Ring (D1) | — | 58.99 mm | — |
| Maximum Diameter Of Housing Shoulder (Da Max) | — | 81 mm | — |
| Minimum Chamfer Dimension (Rmin) | — | 1.5 mm | — |
| Caliber Diameter Inner Ring (D1) | — | 56.82 mm | — |
| Maximum Fillet Radius (Ra Max) | — | 1.5 mm | — |
| Shoulder Diameter Outer Ring (D1) | — | 77.02 mm | — |
| Contact Angle (Α) | — | 30 ° | — |
| Distance Between The Apexes Of The Pressure Cones (A) | — | 53.1 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.