SKF · rolling bearings
SKF NA 4840
Needle 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 | 200 mm |
|---|---|
| Outside diameter | 250 mm |
| Width | 50 mm |
| Basic dynamic load rating | 224 kN |
| Basic static load rating | 735 kN |
| Reference speed | 1800 r/min |
| Limiting speed | 2000 r/min |
| Bearing part | Complete bearing |
| Number of rows | 1 |
| Outer ring type | Machined (solid) |
| Aligning feature | Without |
| Cage | Sheet metal |
| Number of flanges, outer ring | 2 |
| Radial internal clearance | CN |
| Tolerance class | Normal |
| Material, bearing | Bearing steel |
| Coating | Without |
| Sealing | Without |
| Lubricant | None |
| Relubrication feature | With |
| Indicative carbon footprint for new product | 21.6 kg CO_2e |
| Product net weight | 5.84 kg |
| eClass code | 23-05-09-03 |
| UNSPSC code | 31171512 |
| Dimensions · Bore diameter · (d) | 200 mm |
| Dimensions · Outside diameter · (D) | 250 mm |
| Dimensions · Width · (B) | 50 mm |
| Dimensions · Raceway diameter inner ring · (F) | 220 mm |
| Dimensions · Chamfer dimension outer ring · (r_1,2) · min. | 1.5 mm |
| Dimensions · Permissible axial displacement from the normal position of one bearing ring relative to the other · (s) · max. | 1.5 mm |
| Abutment dimensions · Smallest permissible abutment diameter shaft, bearings with flanges · (d_a) · min. | 208 mm |
| Abutment dimensions · Diameter of housing abutment · (D_a) · max. | 242 mm |
| Abutment dimensions · Fillet radius · (r_a) · max. | 1.5 mm |
| Calculation data · Basic dynamic load rating · (C) | 224 kN |
| Calculation data · Basic static load rating · (C_0) | 735 kN |
| Calculation data · Fatigue load limit · (P_u) | 75 kN |
| Calculation data · Reference speed | 1800 r/min |
| Calculation data · Limiting speed | 2000 r/min |
Family specifications and selection conditions
| Product description | Single row needle roller bearings incorporate cylindrical rollers that are small in diameter relative to their length. Owing to their large number of rollers, the bearings have a high load carrying capacity. The outer ring includes two integral flanges to guide the bearing axially and an annular groove with one or more lubrication holes to facilitate relubrication. |
|---|---|
| Manufacturer features | High radial load carrying capacity • High stiffness • Low cross-sectional height • Accommodate axial displacement in both directions • Separable design |
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.