Drive Key for Heavy-Duty Graco Pump Power Transmission
Compatible Machines
- Designed for Graco airless sprayers requiring a 1/4" square x 1.875" drive key interface.
- Compatible with select Graco high-performance pump assemblies and drive systems.
- Used in contractor-grade Graco Mark series sprayers where specified in the drive coupling system.
- Fits industrial Graco fluid section and motor coupling configurations requiring extended-length drive keys.
- Applicable to Graco equipment using reinforced torque transfer mechanisms for continuous-duty spraying.
What is Graco 18B340 Key, 1/4" Sq X 1.875"?
The Graco 18B340 Key, 1/4" Sq X 1.875" is a precision-engineered drive key used in Graco airless spray systems to connect and synchronize rotating components within the pump and motor assembly. Its 1/4-inch square profile and extended 1.875-inch length provide enhanced surface engagement, ensuring strong and stable torque transfer during high-pressure operation.
Built for durability and consistent performance, this component is essential in maintaining alignment and preventing slippage in heavy-duty spraying applications where reliable power transmission is critical.
Frequently Asked Questions
It locks rotating components in place within the pump drive system, ensuring efficient and consistent torque transfer.
It indicates a 1/4-inch square cross-section and a 1.875-inch length, defining the key’s fit and engagement depth in the drive assembly.
It is used in select Graco professional and industrial airless sprayers that require a 1/4" square extended drive key in their pump assemblies.
Longer keys provide greater contact area, improving torque stability and reducing wear in high-load spraying applications.
