SKF · super precision bearings
SKF 71940 ACD/P4ATBTB
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 | 200 mm |
|---|---|
| Outside diameter | 280 mm |
| Width | 114 mm |
| Contact angle | 25 ° |
| Basic dynamic load rating | 449 kN |
| Basic static load rating | 750 kN |
| Note | Refer to catalogue data or contact SKF for the attainable speeds |
| Contact type | Normal contact (two-point contact) |
| Number of rows | 3 |
| Ring type | One-piece inner and outer rings |
| Design | High-capacity D |
| Universal matching bearing | No |
| Matched arrangement | > |
| Number of bearings in matched set | 3 |
| 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 | 67 kg CO_2e |
| Product net weight | 18.1 kg |
| eClass code | 23-05-08-04 |
| UNSPSC code | 31171531 |
| Universal matching bearing(s) | No |
| Dimensions · Bore diameter · (d) | 200 mm |
| Dimensions · Outside diameter · (D) | 280 mm |
| Dimensions · Width · (B) | 114 mm |
| Dimensions · Shoulder diameter of inner ring (large side face) · (d_1) | 224.7 mm |
| Dimensions · Chamfer dimension · (r_1,2) · min. | 2.1 mm |
| Dimensions · Chamfer dimension · (r_3,4) · min. | 1 mm |
| Abutment dimensions · Diameter of shaft abutment · (d_a) · min. | 211 mm |
| Abutment dimensions · Diameter of housing abutment · (D_b) · max. | 275 mm |
| Abutment dimensions · Radius of fillet · (r_a) · max. | 2 mm |
| Abutment dimensions · Radius of fillet · (r_b) · max. | 1 mm |
| Abutment dimensions · Position of oil nozzle · (d_n) | 231.4 mm |
| Calculation data · Basic dynamic load rating · (C) | 449 kN |
| Calculation data · Basic static load rating · (C_0) | 750 kN |
| Calculation data · Fatigue load limit · (P_u) | 20.4 kN |
| Calculation data · Attainable speeds | Refer to catalogue data or contact SKF for the attainable speeds |
| Calculation data · Contact angle · (α) | 25 ° |
| Calculation data · Ball diameter · (D_w) | 25.4 mm |
| Calculation data · Number of rows · (i) | 3 |
| Calculation data · Number of balls (per bearing) · (z) | 26 |
| Calculation data · Reference grease quantity (per bearing) · (G_ref) | 81 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) | 3375 N |
| Calculation data · Preload and stiffness (back-to-back, face-to-face) · Axial stiffness | 921 N/µm |
| Calculation data · Correction factors for preload calculation · Correction factor dependent on bearing series and size · (f) | 1.2 |
| Calculation data · Correction factors for preload calculation · Correction factor dependent on contact angle · (f_1) | 0.98 |
| 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 |
Family specifications and selection conditions
| Product description | These sets of three matched super-precision angular contact ball bearings are available as universally matchable bearings or as preconfigured arrangements. Sets arranged in back-to-back and tandem, or face-to-face and tandem, are available in different preload classes and correct mounting results in preload within a predetermined range, without the need for shims or similar devices. Sets of three bearings paired in tandem need to be mounted against a single bearing, or another set of bearings in tandem, to achieve the desired preload. The bore and outside diameters of the bearings are matched to within a maximum of one-third of the permitted diameter tolerance, to provide better load distribution than single universally matchable bearings. |
|---|---|
| Manufacturer features | Very high running accuracy • High axial and radial stiffness • High axial and radial 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.