Precision Drive Component for Graco Pump Systems
Compatible Machines
- Graco 18B339 Key is used across select Graco airless spray equipment requiring a 3/16" square x 3/4" drive key configuration.
- Compatible with Graco airless paint sprayers featuring pump drive shaft coupling systems.
- Suitable for Graco professional-grade sprayers including selected Graco Mark series units (e.g., Mark V, Mark X) where applicable.
- Used in Graco pump assemblies and fluid section drive mechanisms requiring precise torque transfer.
- Fits industrial and contractor-grade Graco sprayer systems that specify a 3/16" square key interface.
What is Graco 18B339 Key, 3/16" Sq X 3/4"?
The Graco 18B339 Key, 3/16" Sq X 3/4" is a precision-machined drive key designed to securely transfer rotational force between mechanical components in Graco airless spray systems. It features a 3/16-inch square profile and a 3/4-inch length, ensuring a tight and reliable fit within pump drive assemblies. This small but critical component helps maintain synchronization between the motor and pump mechanism, reducing slippage and ensuring consistent spray performance.
Manufactured for durability and accuracy, this key is commonly used in high-pressure spraying equipment where dependable torque transmission is essential for professional coating applications.
Frequently Asked Questions
It is used to lock and transmit torque between the drive shaft and connected components in Graco pump systems, ensuring smooth and efficient operation.
It refers to the key’s square cross-section size (3/16 inch) and its length (3/4 inch), which determines compatibility with specific drive assemblies.
No, it is only compatible with specific Graco models that require a 3/16" square drive key. Always verify your equipment specifications before purchase.
A worn or damaged key can lead to slippage, reduced pumping efficiency, and potential damage to the drive system. Replacing it ensures reliable operation.
