SKF · rolling bearings
SKF W 638/3-2Z
Deep groove 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 | 3 mm |
|---|---|
| Outside diameter | 7 mm |
| Width | 3 mm |
| Basic dynamic load rating | 0.178 kN |
| Basic static load rating | 0.057 kN |
| Reference speed | 160000 r/min |
| Limiting speed | 80000 r/min |
| Filling slots | Without |
| Number of rows | 1 |
| Locating feature, bearing outer ring | Without |
| Bore type | Cylindrical |
| Cage | Stamped stainless steel |
| Matched arrangement | No |
| Radial internal clearance | CN |
| Material, bearing | Stainless steel |
| Coating | Without |
| Sealing | Shield on both sides |
| Sealing type | Non-contact |
| Lubricant | Grease |
| Relubrication feature | Without |
| Indicative carbon footprint for new product | 0.003 kg CO_2e |
| Product net weight | 0.0007 kg |
| eClass code | 23-05-08-01 |
| UNSPSC code | 31171504 |
| Dimensions · Bore diameter · (d) | 3 mm |
| Dimensions · Outside diameter · (D) | 7 mm |
| Dimensions · Width · (B) | 3 mm |
| Dimensions · Recess diameter · (d_2) · ≈ | 3.85 mm |
| Dimensions · Recess diameter · (D_2) · ≈ | 6.35 mm |
| Dimensions · Chamfer dimension · (r_1,2) · min. | 0.1 mm |
| Abutment dimensions · Diameter of shaft abutment · (d_a) · min. | 3.7 mm |
| Abutment dimensions · Diameter of shaft abutment · (d_a) · max. | 3.8 mm |
| Abutment dimensions · Diameter of housing abutment · (D_a) · max. | 6.5 mm |
| Abutment dimensions · Radius of shaft or housing fillet · (r_a) · max. | 0.1 mm |
| Calculation data · Basic dynamic load rating · (C) | 0.178 kN |
| Calculation data · Basic static load rating · (C_0) | 0.057 kN |
| Calculation data · Fatigue load limit · (P_u) | 0.002 kN |
| Calculation data · Reference speed | 160000 r/min |
| Calculation data · Limiting speed | 80000 r/min |
| Calculation data · Minimum load factor · (k_r) | 0.02 |
| Calculation data · Calculation factor · (f_0) | 7.1 |
Family specifications and selection conditions
| Product description | Stainless steel single row deep groove ball bearing with seals or shields on both sides, provide greater chemical and corrosion resistance. As with deep groove ball bearings generally, they are particularly versatile, have low friction and are optimized for low noise and low vibration, which enables high rotational speeds. They accommodate radial and axial loads in both directions, are easy to mount, and require less maintenance than other bearing types. The integral sealing can significantly prolong bearing service life because it keeps lubricant in the bearings and contaminants out. Also available on request with special sized bore and/or outside diameters, suitable for reworked shafts and housings. |
|---|---|
| Manufacturer features | Greater chemical and corrosion resistance • Integral sealing prolongs bearing service life • Typical benefits of single row deep groove 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.