Swing Shaft Description
The YNF16791 Swing Motor Shaft (BZ250524635 / 1117T), with part number 203-26-61220, is specifically engineered for the Komatsu PC120-6 excavator’s swing drive assembly. This critical component transfers hydraulic motor torque to the swing reduction gearbox, enabling smooth and precise rotation of the upper structure. Manufactured from heat-treated alloy steel with tight tolerance machining, it ensures high torque capacity and long service life. It is a go-to replacement for repair professionals and B2B wholesalers handling excavator swing systems.
Swing Shaft Technical Sheet
| Item |
Details |
| YNF Code |
YNF16791 |
| OEM Part Number |
203-26-61220 |
| Model Number |
BZ250524635 / 1117T |
| Machine Compatibility |
Komatsu PC120-6 |
| Category |
Swing Motor Shaft |
| Application Area |
Swing Motor Drive / Gearbox |
| Material |
Heat-treated forged alloy steel |
| Process |
CNC Precision Machining |
| Weight |
Approx. 3.2kg |
| Brand |
YNF |
| Origin |
China |
| MOQ |
2 pieces |
| Shipping Options |
Express / Air / Sea |
| Payment Methods |
T/T, Western Union, L/C |
Swing Shaft Applications
| Application Area |
Description |
| Excavator Swing Drive |
Power transmission between swing motor & gear |
| Machine Brand |
Komatsu |
| Applicable Models |
PC120-6 and compatible variants |
| Maintenance Use |
Replacement of worn/damaged swing shafts |
| Buyer Type |
Parts dealers, repair centers, rental fleets |
Swing Motor Shaft Detail Display
Related Knowledge:
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Swing motor shafts are crucial in enabling 360° excavator rotation, linking the motor to the planetary reducer.
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Proper material and heat treatment are essential to withstand constant torque loading.
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Routine inspection and replacement prevent swing lag, vibration, and operational risk.
Related Products:
-
Komatsu PC120-6 Swing Gearbox
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Swing Bearing for PC120-6
-
Swing Motor Seal Kits
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Swing Planet Gear Assemblies
FAQs:
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Q: Is this shaft made to OEM standards?
A: Yes, it matches OEM specs for size, hardness, and functionality.
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Q: Can it be used in other Komatsu models?
A: Please provide part number cross-references or gearbox model to confirm.
