Excavator Slewing Bearing Description
The YNF16979 slewing bearing (4423-43000-0 / D304009) is an essential component for the excavator swing mechanism. It allows smooth 360-degree rotation of the upper structure, ensuring stability and precision during digging, lifting, and loading operations.
This slewing bearing has an outer diameter of 486mm, inner diameter of 314mm, and height of 50.5mm, featuring (20+2)+22 mounting holes for secure installation. Manufactured with high-grade steel and precision machining, it provides excellent load-bearing capacity, wear resistance, and long operational life under heavy-duty working conditions.
Replacing a worn slewing bearing restores excavator rotation accuracy, reduces vibration, and prevents costly downtime. YNF’s aftermarket slewing bearings are widely trusted by repair shops, parts distributors, and construction contractors worldwide as a cost-effective alternative to OEM products.
Excavator Slewing Bearing Technical Sheet
| Parameter |
Details |
| YNF Part Number |
YNF16979 |
| OEM Part Numbers |
4423-43000-0 / D304009 |
| Product Type |
Excavator Slewing Bearing / Swing Bearing |
| Outer Diameter (OD) |
486 mm |
| Inner Diameter (ID) |
314 mm |
| Height (H) |
50.5 mm |
| Mounting Holes |
(20+2)+22 |
| Function |
Provides smooth 360° excavator upper structure rotation |
| Material |
High-strength alloy steel |
| Resistance |
Heavy load, high impact, and wear resistance |
| Country of Origin |
China |
| Aftermarket Brand |
YNF |
| MOQ |
1 Piece |
| Shipping Method |
Sea, Air, Express |
| Payment Terms |
T/T, PayPal, Western Union |
Excavator Slewing Bearing Applications
| Application Area |
Description |
| Excavator Swing System |
Enables 360° rotation of the upper structure |
| Heavy Equipment Rotation |
Provides stability and precision during operation |
| Preventive Maintenance |
Restores smooth motion and prevents downtime |
| Repair Shops & Distributors |
Widely used in excavator part supply and service market |
Excavator Slewing Bearing Detail Display
Related Products:
-
Excavator Swing Bearing / Slewing Rings
-
Excavator Swing Gear & Swing Motor Parts
-
Hydraulic Travel Motor Parts & Repair Kits
FAQs:
Q: What are the dimensions of this slewing bearing?
A: OD486 × ID314 × H50.5 with (20+2)+22 holes.
Q: What function does the excavator swing bearing serve?
A: It allows smooth and stable 360° rotation of the excavator upper frame.
Q: Why choose YNF slewing bearings?
A: They provide OEM-level reliability, precision machining, and cost-effectiveness.
