Accupro ACC-50-1/4 Boring Grooving Bar Holder

Product Description

The ACCUPRO ACC-50-1/4 is a boring and grooving bar holder designed for use with boring bars featuring a 1/4 inch inner diameter and a 1/2 inch outer diameter. The holder measures 2-3/4 inches overall length with a 0.63 inch head diameter and belongs to the Series DH product line. Two lock-down screws secure the boring bar firmly in position during machining operations. Machinists and toolroom technicians use this holder to mount and support boring bars on lathes, boring mills, and similar metal-cutting equipment where precise internal diameter work or grooving operations are required.

This bar holder is suited for precision boring and grooving applications in machine shops, production environments, and toolroom settings. The compact 1/4 inch ID accommodates small-diameter boring bars, making it appropriate for fine internal turning and grooving work on smaller workpiece bores. It is intended for professional machinists and CNC or manual lathe operators who require a reliable, repeatable toolholder for tight-tolerance operations.

Key Features

• 1/4 inch ID accepts small-diameter boring bars for fine internal machining
• 1/2 inch OD fits standard toolholder pockets and turret stations
• 2-3/4 inch overall length provides rigid bar support with minimal overhang
• 0.63 inch head diameter compatible with Series DH boring bar systems
• Two lock-down screws deliver secure clamping and repeatable bar positioning

Compatibility

Designed as an OEM-style toolholder for use with 1/4 inch ID boring and grooving bars in the Series DH line. Fits standard lathe turrets and boring setups that accept 1/2 inch OD toolholders.

Installation Notes

Installation is performed by qualified machinists or toolroom personnel. Power down and lock out the machine spindle before mounting or removing any toolholder. Insert the boring bar to the appropriate depth and tighten both lock-down screws evenly to ensure secure clamping. Verify bar runout and alignment before resuming cutting operations.