SKF · rolling bearings
SKF BT4B 331168 B
Tapered roller bearings — manufacturer technical reference and quotation support in Saudi Arabia.
لطلب عرض سعر في السعودية، أرسل رقم القطعة أو المقاس والكمية والمدينة. يُرجى تأكيد التوافق والتوفر والسعر مع فريقنا.
| Bore diameter | 269.875 mm |
|---|---|
| Outside diameter | 381 mm |
| Width, total | 282.575 mm |
| Width, inner ring | 282.575 mm |
| Width, outer ring | 282.575 mm |
| Contact angle | 12.5 ° |
| Basic dynamic load rating | 3080 kN |
| Basic static load rating | 7500 kN |
| Bearing part | Complete bearing |
| Design | TQO |
| Number of rows | 4 |
| Locating feature, bearing outer ring | Without |
| Bore type | Cylindrical |
| Cage | Sheet metal |
| Arrangement of contact angle (double-row bearing) | Not applicable |
| Matched arrangement | No |
| Coating | Without |
| Sealing | Without |
| Lubricant | None |
| Relubrication feature | With |
| Candidate for remanufacturing | Yes |
| Indicative carbon footprint for new product | 382 kg CO_2e |
| Indicative carbon footprint for remanufactured product | 127 kg CO_2e |
| Product net weight | 103 kg |
| eClass code | 23-05-09-10 |
| Design variant/feature | TQO/WI |
| Dimensions · Bore diameter · (d) | 269.875 mm |
| Dimensions · Outside diameter · (D) | 381 mm |
| Dimensions · Total bearing width over inner rings · (B) | 282.575 mm |
| Dimensions · Total bearing width over outer rings · (T) | 282.575 mm |
| Dimensions · Abutment diameter shaft · (d_1) · ≈ | 293 mm |
| Dimensions · Abutment diameter housing · (D_1) · ≈ | 339 mm |
| Dimensions · Chamfer dimension inner ring · (r_1,2) · min. | 3.3 mm |
| Dimensions · Outer ring radius (chamfer) · (r_3,4) · min. | 3.3 mm |
| Calculation data · Basic dynamic load rating · (C) | 3080 kN |
| Calculation data · Basic static load rating · (C_0) | 7500 kN |
| Calculation data · Fatigue load limit · (P_u) | 640 kN |
| Calculation data · Comparative radial load rating · (C_F) | 815 kN |
| Calculation data · Comparative axial load rating · (C_Fa) | 132 kN |
| Calculation data · Thrust factor · (K) | 1.8 |
| Calculation data · Limiting value · (e) | 0.33 |
| Calculation data · Calculation factor · (Y_1) | 2 |
| Calculation data · Calculation factor · (Y_2) | 3 |
| Calculation data · Calculation factor · (Y_0) | 2 |
Family specifications and selection conditions
| Product description | Four-row tapered roller bearings can accommodate combined heavy radial and axial loads at low to moderate speeds. They are used almost exclusively in work roll applications such as rolling mills. SKF manufactures four-row tapered roller bearings in TQO and TQI designs, in many variants and with different features. |
|---|---|
| Manufacturer features | Very high radial load carrying capacity • Accommodate axial loads in both directions • Axial space-saving solution for roll necks • Low friction • Long service life |
Manufacturer references
Follow the complete manufacturer documentation for application restrictions, materials, tolerances and installation requirements. Limits may not apply simultaneously. We do not publish inferred stock, pricing or ratings.