CAT Gear Hub 191-2684 Description
The YNF18270 gear hub ( 191-2684) is a critical component used in Caterpillar excavator travel final drive systems. It functions as a key transmission element in the first stage planetary gearbox, responsible for supporting and transferring torque during machine movement.
Manufactured from high-strength forged alloy steel, the gear hub is precisely machined to ensure accurate gear engagement with planetary components. The 21-tooth structure is engineered to maintain stable meshing performance under high load and continuous operation conditions.
A controlled heat treatment process enhances surface hardness and fatigue resistance, making the component suitable for harsh environments such as mining sites, construction projects, and heavy earthmoving operations. Strict dimensional control ensures consistent installation compatibility and reliable drivetrain performance.
CAT Gear Hub 191-2684 Technical Data Sheet
| Item |
Specification |
| Product Name |
Gear Hub / Planetary Hub |
| YNF Number |
YNF18270 |
| OEM Part No |
191-2684 / 96.45418 |
| Teeth |
21T |
| Machine Model |
Caterpillar Excavator (CAT series) |
| System Type |
Travel Final Drive (1st Stage) |
| Material |
Forged Alloy Steel |
| Hardness |
HRC 45–55 |
| Processing |
CNC Precision Machining |
| Function |
Planetary Gear Support Hub |
| Installation Position |
Final Drive Gearbox |
| Brand |
YNF |
| MOQ |
1 Piece |
| Origin |
China |
| Shipping Method |
Air / Sea / Express |
| Payment Terms |
T/T, Western Union, PayPal |
CAT Gear Hub 191-2684 Applications
| Industry |
Application Scenario |
| Construction |
Excavator travel system repair |
| Mining |
Heavy-duty earthmoving operations |
| Quarry |
Continuous rock loading work |
| Infrastructure |
Road and foundation engineering |
| Repair Workshop |
Final drive gearbox rebuilding |
CAT Gear Hub 21T Detail Display
The gear hub is a key structural component in the planetary gearbox system of excavator travel drives. It supports gear rotation and ensures stable torque distribution during machine operation.
Common issues include wear from long-term friction, insufficient lubrication, and overload stress. Regular inspection and timely replacement are essential to maintain drivetrain efficiency and prevent breakdowns.
YNF Machinery also supplies related CAT travel gearbox components:
- Sun gear
- Planetary gear set
- Ring gear
- Carrier assembly
- Final drive housing parts
