Dorian Tool 73310100565 Boring Bar Holder Series Ca

Product Description

The DORIAN TOOL 73310100565 is a Series CA dual boring bar holder designed for use on engine lathes with a swing range of 16 to 20 inches. It mounts to a compatible quick-change tool post and securely holds boring bars up to 2 inches in diameter. The holder stands 3 inches overall height and measures 4.5 inches in overall length, with a centerline height of 1 inch that positions the cutting tool on center with the lathe spindle. At 11.05 pounds, the holder provides the mass and rigidity needed to reduce chatter during internal boring operations. Licensed machinists and CNC lathe operators are the primary installers of this type of tooling accessory.

This holder is suited for metalworking lathes in job shop, production, and toolroom environments where swing capacity falls in the 16 to 20 inch range (400 to 500 mm). The dual-bar configuration allows two boring bars to be staged in the same holder, supporting faster changeovers between roughing and finishing passes on internal bores. It does not include through-coolant capability. Typical applications include internal diameter turning, facing of bores, and threading operations where a rigid, repeatable tool position is required.

Key Features

• Accepts boring bars up to 2 inches in diameter
• Dual boring bar configuration for staging two bars simultaneously
• Centerline height of 1 inch for on-center tool positioning
• Compatible with lathes in the 16 to 20 inch swing range
• Overall height of 3 inches and overall length of 4.5 inches for a compact, rigid profile
• No through-coolant passages, keeping setup straightforward

Compatibility

Designed as an OEM-style quick-change tool post holder for engine lathes with a swing capacity of 16 to 20 inches (400 to 500 mm), Series CA tool post systems.

Installation Notes

Installation is performed by a qualified machinist or lathe operator. Before mounting or adjusting any tool post holder, disengage the lathe drive and bring the spindle to a complete stop. Secure the holder to the tool post stud and lock nut per the tool post manufacturer torque guidelines and verify the boring bar centerline aligns with the lathe spindle centerline before beginning a cut. Inspect the boring bar clamp screws for proper seating to prevent tool pull-out under cutting load.