SKF · rolling bearings
SKF NKX 12 Z
Combined needle roller / thrust 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 | 12 mm |
|---|---|
| Outside diameter | 21 mm |
| Width | 23 mm |
| Reference speed | 9000 r/min |
| Limiting speed | 7500 r/min |
| Rolling bearing type | Needle roller / thrust ball bearing |
| Bearing part | Radial part without inner ring |
| Thrust part | With cage |
| Radial part | With cage |
| Rolling element (thrust part) | Balls |
| Axial load capability | Single-direction |
| Tolerance class | Other |
| Material, bearing | Bearing steel |
| Coating | Without |
| Special feature | Thrust part with stamped steel cover without lubrication holes |
| Lubricant (thrust part) | Grease |
| Indicative carbon footprint for new product | 0.15 kg CO_2e |
| Product net weight | 0.04 kg |
| eClass code | 23-05-09-03 |
| UNSPSC code | 31171512 |
| Dimensions · Diameter under rollers · (F_w) | 12 mm |
| Dimensions · Outside diameter · (D) | 21 mm |
| Dimensions · Width · (C) | 23 mm |
| Dimensions · Width of thrust part · (C_1) | 9 mm |
| Dimensions · Distance side face to lubrication hole · (C_2) | 6.5 mm |
| Dimensions · Bore diameter of thrust part · (d) | 12 mm |
| Dimensions · Diameter of stamped steel cover · (D_2) | 27.2 mm |
| Dimensions · Chamfer dimension · (r_1,2) · min. | 0.3 mm |
| Abutment dimensions · Diameter of shaft abutment · (d_a) · min. | 21.7 mm |
| Abutment dimensions · Radius of fillet · (r_a) · max. | 0.3 mm |
| Abutment dimensions · Radius of fillet · (r_b) · max. | 0.3 mm |
| Abutment dimensions · Bore diameter of associated inner ring · (d_i) | 9 mm |
| Abutment dimensions · Diameter of inner ring raceway · (F) | 12 mm |
| Abutment dimensions · Width of associated inner ring · (B_i) | 16 mm |
| Calculation data · Basic dynamic load rating, radial · (C) | 9.13 kN |
| Calculation data · Basic static load rating, radial · (C_0) | 12 kN |
| Calculation data · Basic dynamic load rating, axial · (C) | 10.4 kN |
| Calculation data · Basic static load rating, axial · (C_0) | 16.6 kN |
| Calculation data · Fatigue load limit, radial · (P_u) | 1.43 kN |
| Calculation data · Fatigue load limit, axial · (P_u) | 0.62 kN |
| Calculation data · Minimum axial load factor · (A) | 0.001 |
| Calculation data · Reference speed | 9000 r/min |
| Calculation data · Limiting speed | 7500 r/min |
| Associated products · Inner ring | IR 9x12x16 |
Family specifications and selection conditions
| Product description | These bearings consist of a radial needle roller bearing combined with a thrust ball bearing. Together they can accommodate both radial loads and axial loads in one direction. In addition, they can operate at relatively high speeds. Their low cross-sectional height makes the bearings particularly suitable for applications where other types of locating bearing arrangements occupy too much space. The thrust part is capped with a cover that forms a gap-type seal to retain the grease in the bearings. |
|---|---|
| Manufacturer features | Accommodate radial and axial loads in one direction • High load carrying capacity • Relatively high-speed capability • Low cross section • Non-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.