SKF · rolling bearings
SKF 305272 DA
Angular contact ball 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 | 220 mm |
|---|---|
| Outside diameter | 309.5 mm |
| Width | 76 mm |
| Contact angle | 32 ° |
| Basic dynamic load rating | 312 kN |
| Basic static load rating | 520 kN |
| Reference speed | 2000 r/min |
| Limiting speed | 2000 r/min |
| Contact type | Normal contact (two-point contact) |
| Number of rows | 2 |
| Locating feature, bearing outer ring | Without |
| Ring type | Two-piece inner ring and one-piece outer ring |
| Cage | Machined brass |
| Arrangement of contact angle (double-row bearing) | Back-to-back (O) |
| Matched arrangement | No |
| Universal matching bearing | No |
| Axial internal clearance | NSTD |
| Material, bearing | Bearing steel |
| Coating | Without |
| Sealing | Without |
| Lubricant | None |
| Relubrication feature | With |
| Indicative carbon footprint for new product | 65.2 kg CO_2e |
| Product net weight | 17.6 kg |
| eClass code | 23-05-08-03 |
| UNSPSC code | 31171531 |
| Dimensions · Bore diameter · (d) | 220 mm |
| Dimensions · Outside diameter · (D) | 309.5 mm |
| Dimensions · Width · (B) | 76 mm |
| Dimensions · Shoulder diameter inner ring for two-piece inner ring · (d_1) · ≈ | 252.5 mm |
| Dimensions · Shoulder diameter outer ring · (D_1) · ≈ | 286 mm |
| Dimensions · Width annular lubrication groove at outer ring · (b) | 13.9 mm |
| Dimensions · Diameter lubrication hole (outer ring) · (K) | 7.5 mm |
| Dimensions · Chamfer dimension inner ring for two-piece inner ring · (r_1,2) · min. | 2.1 mm |
| Dimensions · Distance pressure point(s) · (a) | 204 mm |
| Abutment dimensions · Abutment diameter shaft · (d_a) · min. | 225 mm |
| Abutment dimensions · Abutment diameter housing · (D_a) · max. | 284 mm |
| Abutment dimensions · Fillet radius · (r_a) · max. | 2.1 mm |
| Calculation data · Basic dynamic load rating · (C) | 312 kN |
| Calculation data · Basic static load rating · (C_0) | 520 kN |
| Calculation data · Fatigue load limit · (P_u) | 13.4 kN |
| Calculation data · Reference speed | 2000 r/min |
| Calculation data · Limiting speed | 2000 r/min |
| Calculation data · Calculation factor · (k_r) | 0.095 |
| Calculation data · Limiting value · (e) | 0.86 |
| Calculation data · Calculation factor · (X) | 0.62 |
| Calculation data · Calculation factor · (Y_0) | 0.63 |
| Calculation data · Calculation factor · (Y_1) | 0.73 |
| Calculation data · Calculation factor · (Y_2) | 1.2 |
Family specifications and selection conditions
| Product description | Double row angular contact ball bearing, with two-piece inner ring and relubrication feature, correspond to a pair of single row angular contact ball bearings in a back-to-back arrangement. The two-piece inner ring enables incorporation of more balls, resulting in higher load carrying capacity. The annular lubrication groove and holes in the outer ring facilitates relubrication. |
|---|---|
| Manufacturer features | Accommodate very high axial loads in both directions, radial loads, and tilting moments • Relubrication feature • Suitable where a stiff bearing arrangement is required • Require less axial space than equivalent pair of single row angular contact ball bearings |
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.