H R Manufacturing HR-6B-2.0-P Soft Lathe Chuck Jaw

Product Description

The H R MANUFACTURING HR-6B-2.0-P is a soft lathe chuck jaw designed for precision turning operations on manual and CNC lathes. Machined from 1018 steel, this square-profile jaw features a serrated interface for positive engagement with the master jaw serrations on compatible scroll chucks. It measures 1.0 inch wide, 2.0 inches tall, and 3.125 inches long, with mount hole centers spaced 0.969 inches apart. The soft construction allows the jaw face to be bored to a custom diameter on the machine, making it well suited for workholding setups that require a true, repeatable grip on finished or close-tolerance parts. Sold as a single jaw. A standard lathe chuck requires three jaws total.

This jaw is designed for use with 6-inch three-jaw scroll chucks. It is appropriate for light to medium-duty turning in job shop, toolroom, and production environments. Machinists bore the jaw face in place to match a specific workpiece diameter, then use the set to hold round or hex stock concentrically. This part is commonly installed on manual engine lathes and CNC turning centers equipped with 6-inch chucks requiring replacement or custom-bored soft jaw sets.

Key Features

• Serrated jaw interface for positive, repeatable engagement with master jaw serrations
• 1018 steel construction allows easy in-place boring without risk of tool damage
• Square jaw profile suits a wide range of custom workholding setups
• Mount hole centers at 0.969 inches with 8 mm fastener size for direct bolt-in fit
• Groove width of 0.433 inches matches standard serrated master jaw geometry
• Compatible with 6-inch three-jaw scroll chucks (set of 3 jaws required per chuck)

Compatibility

Designed for use with 6-inch diameter three-jaw scroll chucks with a serrated master jaw interface and 8 mm mounting fasteners. Confirm groove width and mount hole spacing against your chuck specification before ordering.

Installation Notes

Installation and boring of soft chuck jaws should be performed by a qualified machinist. Disconnect and lock out power to the lathe before removing or installing chuck jaws. Verify fastener torque against the chuck manufacturer's specification using appropriate hex or socket tooling. After boring, always confirm jaw runout with a dial indicator before introducing a workpiece to the spindle.