SKF · rolling bearings
SKF QJ 248 N2MA
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 | 240 mm |
|---|---|
| Outside diameter | 440 mm |
| Width | 72 mm |
| Contact angle | 35 ° |
| Basic dynamic load rating | 650 kN |
| Basic static load rating | 1200 kN |
| Limiting speed | 2400 r/min |
| Contact type | Four-point contact |
| Number of rows | 1 |
| Locating feature, bearing outer ring | Locating slot |
| Ring type | Two-piece inner ring and one-piece outer ring |
| Cage | Machined brass |
| Matched arrangement | No |
| Universal matching bearing | No |
| Axial internal clearance | CN |
| Material, bearing | Bearing steel |
| Coating | Without |
| Sealing | Without |
| Lubricant | None |
| Relubrication feature | Without |
| Indicative carbon footprint for new product | 206 kg CO_2e |
| Product net weight | 55.7 kg |
| eClass code | 23-05-08-05 |
| UNSPSC code | 31171531 |
| Dimensions · Bore diameter · (d) | 240 mm |
| Dimensions · Outside diameter · (D) | 440 mm |
| Dimensions · Width · (B) | 72 mm |
| Dimensions · Shoulder diameter inner ring · (d_1) · ≈ | 315 mm |
| Dimensions · Shoulder diameter outer ring/ inner diameter housing washer · (D_1) · ≈ | 365 mm |
| Dimensions · Distance pressure point(s) · (a) | 238 mm |
| Dimensions · Locating slot depth outer ring · (h) | 15 mm |
| Dimensions · Locating slot width outer ring · (b) | 12.5 mm |
| Dimensions · Corner radius locating slot · (r_0) | 2.5 mm |
| Dimensions · Chamfer dimension inner ring · (r_1,2) · min. | 4 mm |
| Abutment dimensions · Abutment diameter shaft · (d_a) · min. | 258 mm |
| Abutment dimensions · Abutment diameter housing · (D_a) · max. | 422 mm |
| Abutment dimensions · Fillet radius · (r_a) · max. | 3 mm |
| Calculation data · Basic dynamic load rating · (C) | 650 kN |
| Calculation data · Basic static load rating · (C_0) | 1200 kN |
| Calculation data · Fatigue load limit · (P_u) | 27.5 kN |
| Calculation data · Limiting speed | 2400 r/min |
| Calculation data · Calculation factor · (A) | 4.3 |
| Calculation data · Limiting value · (e) | 0.95 |
| Calculation data · Calculation factor · (X) | 0.6 |
| Calculation data · Calculation factor · (Y_0) | 0.58 |
| Calculation data · Calculation factor · (Y_1) | 0.66 |
| Calculation data · Calculation factor · (Y_2) | 1.1 |
Family specifications and selection conditions
| Product description | Four-point contact ball bearings with locating slots can accommodate high axial loads in both directions and small radial loads. They can operate at very high speeds and are more suitable than deep groove ball bearings for supporting large axial forces. The outer ring, with ball and cage assembly, can be mounted separately from the two inner ring halves. The locating slots can be used to prevent the outer ring from rotating. |
|---|---|
| Manufacturer features | High-speed capability • Accommodate high axial loads in both directions and small radial loads • Require considerably less axial space than double row angular contact ball bearings • The locating slots can be used to prevent the outer ring from rotating |
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.