9/16" Steel Ball Set of 6 (Chuck Balls)

Kwik-Way 9/16” Steel Chuck Balls (Set of 6) - Precision for 4mm Chucks in Centerline System

This 9/16” Steel Ball Set of 6 (Chuck Balls) is a crucial replacement component for Kwik-Way valve refacer chucks, specifically designed to fit a 4mm Chuck. These hardened steel balls are fundamental to the precision of the Kwik-Way “Centerline System,” ensuring highly accurate valve grinding. The system employs two sets of three balls (totaling six) to air-activate and self-align, precisely gripping the valve stem to achieve concentric refacing with accuracy up to .0005 inches. Regular maintenance, including cleaning with denatured alcohol and lubricating with Automatic Transmission Fluid, is essential. This set is intended to replace lost or damaged balls, but not to improve the performance of a worn-out chuck.

Kwik-Way 9/16” Steel Ball Set (Chuck Balls) - Core Component for Centerline Precision

The 9/16” Steel Ball Set of 6 (Chuck Balls) is an indispensable replacement component vital for maintaining the exceptional precision and accurate operation of Kwik-Way valve refacer chucks. This set comprises six hardened steel balls, forming a core part of the innovative Kwik-Way “Centerline System”—a fundamental design principle that underpins highly accurate valve grinding.

Purpose and Composition:

• Crucial Replacement: This set of six 9/16” steel balls, which are essential for replacing any balls that may be lost or damaged during routine chuck maintenance or cleaning.
• Precision Grip Components: Kwik-Way chucks are engineered to use two sets of three hardened steel balls (totaling six balls) to create a robust and highly precise gripping mechanism for the valve stem.
• Specific Fit: This particular set of 9/16” chuck balls is precisely designed to fit a 4mm Chuck, ensuring perfect compatibility and optimal performance for that chuck size.

Function in the Centerline System:

Central to the Kwik-Way Centerline System, these steel balls within the chuck are designed to grip the portion of the valve stem that travels inside the valve guide. This ingenious, air-activated, self-aligning six-ball chuck automatically ensures that the valve stem is precisely aligned. This critical alignment allows the valve face to be refaced concentric to its true center, effectively eliminating run-out and simplifying the valve refacing process by removing the need for stem chamfering or butt grinding before refacing. Kwik-Way SVS II Deluxe Valve Refacers, for instance, utilize a variable speed chuck that allows operators to finely adjust valve speed for optimum finish on various valve materials and diameters.

Unmatched Accuracy:

The sophisticated design of the chuck, leveraging these precision steel balls, enables impressive levels of accuracy:

• Capable of achieving .0005 inches or less runout with a standard chuck.
• Achieves even greater precision of .0002 inches or less when utilizing the optional High Performance Chuck.

The chuck system is versatile, accommodating a wide range of valve stem diameters, from 4mm (0.157”) to 14.3mm (0.5625”).

Essential Maintenance for Optimal Performance:

To ensure the continuous optimal performance and precision of your Kwik-Way chuck, regular and diligent maintenance is vital:

• Cleanliness is Key: The chuck must be kept meticulously clean and free of any debris. Even minute particles can compromise its accuracy and lead to excessive runout.
• Careful Reinstallation: During chuck disassembly for cleaning, these small steel chuck balls may easily fall out. Exercise extreme care during this process, and ensure all six balls are carefully reinstalled in their proper positions.
• Recommended Cleaning & Lubrication: Kwik-Way recommends using denatured alcohol for thoroughly cleaning all chuck components to remove grease and grime. Following cleaning, lubrication with Automatic Transmission Fluid (ATF) is advised to ensure smooth operation and protect the precision components.

It is crucial to understand that while this set provides essential replacement balls for lost or damaged components during cleaning, it is not designed to restore the performance of a mechanically worn-out chuck. A chuck exhibiting significant wear, damage, or consistent runout beyond specifications will require a complete chuck replacement to fully restore its precision and functionality.