Internal Tool 42-1140 Boring Bar Right Hand Solid Carbide

Product Description

The INTERNAL TOOL 42-1140 is a right-hand boring bar machined from micrograin solid carbide, designed for precision internal boring operations on small-diameter features. It accepts a minimum bore diameter of 0.16 inches and reaches a maximum bore depth of 0.20 inches, making it suited for tight, shallow bores where rigidity and edge retention are critical. The 3/16-inch shank diameter fits standard toolholders used on CNC lathes and manual turning centers. Overall length is 0.90 inches, and the bar end angle is 90 degrees. Machinists and toolroom operators working on close-tolerance components rely on micrograin carbide for its superior wear resistance compared to standard carbide grades.

This boring bar is appropriate for light to medium internal boring on a wide range of workpiece materials, including plastic, magnesium, aluminum, copper, brass, bronze, cast iron, steel, titanium, stainless steel, and nickel alloys. It is commonly used in production and job-shop environments where small-bore internal features require consistent dimensional accuracy. The compact 0.90-inch OAL makes it a practical choice for Swiss-style machines, gang-tool lathes, and other small-format turning equipment where clearance is limited.

Key Features

• Micrograin solid carbide construction for high wear resistance and edge stability
• Minimum bore diameter of 0.16 inches for tight internal features
• Maximum bore depth of 0.20 inches with 0.20-inch projection
• Right-hand cutting direction for standard turning setups
• 90-degree bar end angle for consistent shoulder boring
• Compatible with a broad range of workpiece materials from plastics to nickel alloys

Compatibility

Designed as an OEM-style boring bar for use in standard 3/16-inch shank toolholders on CNC and manual turning equipment capable of small-bore internal operations.

Installation Notes

Installation is performed by qualified machinists or toolroom personnel. Ensure the machine spindle is fully stopped and the toolholder is clean and free of debris before seating the shank. Verify proper shank retention torque per the toolholder manufacturer specifications before running. Confirm bore depth and projection clearances match the workpiece geometry before initiating a cut.