SKF · rolling bearings
SKF 311 NR
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 | 55 mm |
|---|---|
| Outside diameter | 120 mm |
| Width | 29 mm |
| Basic dynamic load rating | 79.2 kN |
| Basic static load rating | 67 kN |
| Reference speed | 10000 r/min |
| Limiting speed | 6300 r/min |
| Filling slots | With |
| Number of rows | 1 |
| Locating feature, bearing outer ring | Snap ring (fitted) |
| Bore type | Cylindrical |
| Cage | Sheet metal |
| Matched arrangement | No |
| Radial internal clearance | CN |
| Material, bearing | Bearing steel |
| Coating | Without |
| Sealing | Without |
| Lubricant | None |
| Relubrication feature | Without |
| Indicative carbon footprint for new product | 5.6 kg CO_2e |
| Product net weight | 1.5 kg |
| eClass code | 23-05-08-01 |
| UNSPSC code | 31171504 |
| Dimensions · Bore diameter · (d) | 55 mm |
| Dimensions · Outside diameter · (D) | 120 mm |
| Dimensions · Width · (B) | 29 mm |
| Dimensions · Shoulder diameter · (d_1) · ≈ | 75.34 mm |
| Dimensions · Recess diameter · (D_2) · ≈ | 103.7 mm |
| Dimensions · Diameter of snap ring groove · (D_3) | 115.21 mm |
| Dimensions · Outside diameter of snap ring · (D_4) | 129.7 mm |
| Dimensions · Width of snap ring groove · (b) | 3.1 mm |
| Dimensions · Distance from outer ring side face to snap ring groove · (C) | 4.06 mm |
| Dimensions · Width of snap ring · (f) | 2.82 mm |
| Dimensions · Bottom radius of snap ring groove · (r_0) · max. | 0.6 mm |
| Dimensions · Chamfer dimension · (r_1,2) · min. | 2 mm |
| Abutment dimensions · Diameter of shaft abutment · (d_a) · min. | 66 mm |
| Abutment dimensions · Diameter of housing abutment · (D_a) · max. | 109 mm |
| Abutment dimensions · Diameter of snap ring recess in the housing · (D_b) · min. | 131 mm |
| Abutment dimensions · Width of snap ring recess in the housing · (b_a) · min. | 3.5 mm |
| Abutment dimensions · Distance from outer ring side face to snap ring back face · (C_a) · max. | 6.88 mm |
| Abutment dimensions · Radius of shaft or housing fillet · (r_a) · max. | 2 mm |
| Calculation data · Basic dynamic load rating · (C) | 79.2 kN |
| Calculation data · Basic static load rating · (C_0) | 67 kN |
| Calculation data · Fatigue load limit · (P_u) | 2.85 kN |
| Calculation data · Reference speed | 10000 r/min |
| Calculation data · Limiting speed | 6300 r/min |
| Calculation data · Minimum load factor · (k_r) | 0.05 |
| Included products · Snap ring | SP 120 |
Family specifications and selection conditions
| Product description | Single row deep groove ball bearings with filling slots and a snap ring accommodate more balls than standard deep groove ball bearings. They are of a simple, yet versatile, design and are robust in operation, requiring little maintenance. They can accommodate radial and axial loads in both directions. They have a higher radial load carrying capacity than the corresponding bearings without filling slots but have a limited axial load carrying capacity due to the filling slots. The snap ring, fitted in an annular groove in the outer ring, facilitates axial location of the bearings within their housings. |
|---|---|
| Manufacturer features | Snap ring facilitates axial location within housing • Simple, versatile and robust design • Accommodate higher radial loads than corresponding bearings without filling slots, with limited axial loads in both directions • Require little maintenance |
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.