Accupro ACC-TRG4 Boring Bar Neutral Micrograin 1/4 in Min Bore

Product Description

The ACCUPRO ACC-TRG4 is a solid boring bar designed for internal diameter boring operations on lathes and turning centers. Built from micrograin carbide with a bright finish, it offers a minimum bore diameter of 0.25 inches and a maximum bore depth of 1.25 inches. The neutral cutting direction suits straight-in boring passes without left or right hand bias. The shank diameter measures 0.25 inches and the overall length is 2.5 inches, making this a compact tool suited for small-bore work where rigidity and precision matter. Machinists and toolroom operators use this bar where tight tolerances and clean surface finish are required in small diameter bores.

The ACC-TRG4 is intended for use in small-bore turning and boring applications on manual lathes, CNC turning centers, and toolroom machines. It is well suited for producing precise internal diameters in metal workpieces where the bore diameter falls at or near 0.25 inches. The compact overall length of 2.5 inches limits overhang and reduces chatter, which is critical when working close to minimum bore diameter limits. This bar is a single-piece unit appropriate for job shops, production environments, and maintenance machining work.

Key Features

• Minimum bore diameter of 0.25 inches for small-bore internal turning
• Maximum bore depth of 1.25 inches supports moderate depth-to-diameter ratios
• Micrograin carbide construction provides wear resistance and edge stability
• Neutral cutting direction for straight boring without left or right hand deflection
• Bright finish coating with 0.25-inch shank diameter for standard toolholder compatibility
• Compact 2.5-inch overall length minimizes overhang and reduces vibration

Compatibility

Designed as an OEM-style boring bar for use in standard 0.25-inch boring bar holders and toolpost setups on lathes and CNC turning centers.

Installation Notes

Installation is performed by qualified machinists following standard toolsetting procedures. Ensure the machine spindle is fully stopped and the machine is powered down before mounting or adjusting the boring bar. Secure the shank firmly in the boring bar holder to the recommended clamping torque specified by the toolholder manufacturer. Verify bar centerline height alignment before beginning any cut to maintain bore geometry and prevent tool deflection.