SKF · rolling bearings
SKF 6311-ZNR
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 | 74.1 kN |
| Basic static load rating | 45 kN |
| Reference speed | 12000 r/min |
| Limiting speed | 8000 r/min |
| SKF performance class | SKF Explorer |
| Filling slots | Without |
| Number of rows | 1 |
| Locating feature, bearing outer ring | Snap ring (fitted) |
| Bore type | Cylindrical |
| Matched arrangement | No |
| Radial internal clearance | CN |
| Material, bearing | Bearing steel |
| Coating | Without |
| Sealing | Shield on one side |
| Sealing type | Non-contact |
| Lubricant | None |
| Relubrication feature | Without |
| Indicative carbon footprint for new product | 5.2 kg CO_2e |
| Product net weight | 1.39 kg |
| eClass code | 23-05-08-01 |
| UNSPSC code | 31171504 |
| Dimensions · Bore diameter · (d) | 55 mm |
| Dimensions · Deviation limits of mid-range bore diameter · (t_Δdmp) | -0.012 to 0 mm |
| Dimensions · Outside diameter · (D) | 120 mm |
| Dimensions · Deviation limits of mid-range outside diameter · (t_ΔDmp) | -0.013 to 0 mm |
| Dimensions · Width · (B) | 29 mm |
| Dimensions · Deviation limits of ring width · (t_ΔBs) | -0.1 to 0 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 |
| Dimensions · ISO tolerance class for dimensions | P6 and tighter width tolerance |
| Abutment dimensions · Diameter of shaft abutment · (d_a) · min. | 66 mm |
| Abutment dimensions · Diameter of shaft abutment · (d_a) · max. | 75.2 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 · SKF performance class | SKF Explorer |
| Calculation data · Basic dynamic load rating · (C) | 74.1 kN |
| Calculation data · Basic static load rating · (C_0) | 45 kN |
| Calculation data · Fatigue load limit · (P_u) | 1.9 kN |
| Calculation data · Reference speed | 12000 r/min |
| Calculation data · Limiting speed | 8000 r/min |
| Calculation data · Minimum load factor · (k_r) | 0.03 |
| Calculation data · Calculation factor · (f_0) | 13 |
| Tolerances of run-out · Range of section height at inner ring of assembled bearing · (t_Kia) | 20 µm |
| Tolerances of run-out · Range of section height at outer ring of assembled bearing · (t_Kea) | 35 µm |
| Tolerances of run-out · ISO tolerance class for geometrical tolerances | Normal |
| Included products · Snap ring | SP 120 |
Family specifications and selection conditions
| Product description | Single row deep groove ball bearing, with snap ring groove and seals or shields on one or both sides, 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 snap ring, fitted in an annular groove in the outer ring, facilitates axial location of the bearings within their housings. 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 | Snap ring facilitates axial location within housing • 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.