SKF · super precision bearings
SKF 7044 ACD/P4ADBB
Super-precision 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 | 340 mm |
| Width | 112 mm |
| Contact angle | 25 ° |
| Basic dynamic load rating | 540 kN |
| Basic static load rating | 880 kN |
| Note | Refer to catalogue data or contact SKF for the attainable speeds |
| Contact type | Normal contact (two-point contact) |
| Number of rows | 2 |
| Ring type | One-piece inner and outer rings |
| Design | High-capacity D |
| Universal matching bearing | No |
| Matched arrangement | Back-to-back |
| Number of bearings in matched set | 2 |
| Matched condition (axial clearance/ preload) | Light preload |
| Tolerance class | P4A |
| Material, bearing | Bearing steel |
| Coating | Without |
| Sealing | Without |
| Lubricant | None |
| Indicative carbon footprint for new product | 117 kg CO_2e |
| Product net weight | 31.7 kg |
| eClass code | 23-05-08-04 |
| UNSPSC code | 31171531 |
| Universal matching bearing(s) | No |
| Dimensions · Bore diameter · (d) | 220 mm |
| Dimensions · Outside diameter · (D) | 340 mm |
| Dimensions · Width · (B) | 112 mm |
| Dimensions · Shoulder diameter of inner ring (large side face) · (d_1) | 257 mm |
| Dimensions · Chamfer dimension · (r_1,2) · min. | 3 mm |
| Dimensions · Chamfer dimension · (r_3,4) · min. | 1.5 mm |
| Abutment dimensions · Diameter of shaft abutment · (d_a) · min. | 233 mm |
| Abutment dimensions · Diameter of housing abutment · (D_b) · max. | 334 mm |
| Abutment dimensions · Radius of fillet · (r_a) · max. | 2.5 mm |
| Abutment dimensions · Radius of fillet · (r_b) · max. | 1.5 mm |
| Abutment dimensions · Position of oil nozzle · (d_n) | 267.1 mm |
| Calculation data · Basic dynamic load rating · (C) | 540 kN |
| Calculation data · Basic static load rating · (C_0) | 880 kN |
| Calculation data · Fatigue load limit · (P_u) | 22 kN |
| Calculation data · Attainable speed for grease lubrication | To be calculated: Single bearing (3600) x speed reduction factor (see table below) |
| Calculation data · Attainable speed for oil-air lubrication | To be calculated: Single bearing (5300) x speed reduction factor (see table below) |
| Calculation data · Contact angle · (α) | 25 ° |
| Calculation data · Ball diameter · (D_w) | 38.1 mm |
| Calculation data · Number of rows · (i) | 2 |
| Calculation data · Number of balls (per bearing) · (z) | 21 |
| Calculation data · Reference grease quantity (per bearing) · (G_ref) | 201 cm³ |
| Calculation data · Preload and stiffness (back-to-back, face-to-face) · Preload class | B |
| Calculation data · Preload and stiffness (back-to-back, face-to-face) · Preload · (G) | 4000 N |
| Calculation data · Preload and stiffness (back-to-back, face-to-face) · Axial stiffness | 710 N/µm |
| Calculation data · Correction factors for preload calculation · Correction factor dependent on bearing series and size · (f) | 1.1 |
| Calculation data · Correction factors for preload calculation · Correction factor dependent on contact angle · (f_1) | 0.99 |
| Calculation data · Correction factors for preload calculation · Correction factor, preload class B · (f_2B) | 1 |
| Calculation data · Correction factors for preload calculation · Correction factor for hybrid bearings · (f_HC) | 1 |
| Calculation data · Factors for equivalent bearing load calculation · Axial load factor (back-to-back, face-to-face) · (Y_1) | 0.92 |
| Calculation data · Factors for equivalent bearing load calculation · Axial load factor (back-to-back, face-to-face) · (Y_2) | 1.4 |
| Calculation data · Factors for equivalent bearing load calculation · Axial load factor (back-to-back, face-to-face) · (Y_0) | 0.76 |
| Calculation data · Factors for equivalent bearing load calculation · Radial load factor (back-to-back, face-to-face) · (X_1) | 1 |
| Calculation data · Factors for equivalent bearing load calculation · Radial load factor (back-to-back, face-to-face) · (X_2) | 0.67 |
| Calculation data · Factors for equivalent bearing load calculation · Radial load factor (back-to-back, face-to-face) · (X_0) | 1 |
Family specifications and selection conditions
| Product description | These matched sets of two super-precision, high-capacity, D design, single row angular contact ball bearings are available in a variety of arrangements. They are designed for high-load capacity and relatively high speed operation and, compared to the equivalent SKF B and E design high-speed bearings, are best suited for heavier loads. |
|---|---|
| Manufacturer features | Very high running accuracy • Very high load carrying capacity |
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.