Accupro ACC-50-3/8 Boring Grooving Bar Holder

Product Description

The ACCUPRO ACC-50-3/8 is a boring and grooving bar holder designed for use with boring bars in metal cutting and machining operations. With a 3/8 inch inner diameter (ID) and 1/2 inch outer diameter (OD), it provides a secure, low-profile mount for small-diameter boring bars on lathes and turning centers. The overall length (OAL) is 2-3/4 inches, and the head diameter measures 0.63 inches. Two lock-down screws secure the bar in position, reducing vibration and maintaining repeatability during internal grooving and boring passes. Machinists and tool crib technicians working with precision turning applications will find this holder a direct, dependable option for small-bore work.

This holder is suited for use on manual lathes, CNC turning centers, and toolroom equipment where small-diameter boring or internal grooving is performed. The Series DH designation identifies its toolholder family, which is commonly used in production and job-shop environments. It is appropriate for light to moderate metal removal in ferrous and non-ferrous materials when paired with the correct boring bar insert. Installation is handled by machinists or toolroom personnel during tool setup.

Key Features

• 3/8 inch ID bore accepts standard small-diameter boring bars
• 1/2 inch OD fits compatible toolholder blocks and turrets
• 2-3/4 inch overall length for compact toolholder footprint
• 0.63 inch head diameter for clearance in tight bore environments
• Two lock-down screws for positive bar retention and repeatability
• Series DH designation for straightforward catalog cross-reference

Compatibility

Designed as an OEM-style toolholder for use with 3/8 inch shank boring bars in Series DH compatible tooling setups on lathes and turning centers.

Installation Notes

Installation is performed by a qualified machinist or toolroom technician. Power down and lock out the machine spindle before mounting or adjusting the holder. Secure the boring bar using both lock-down screws evenly to prevent bar rotation during cutting. Verify proper bar protrusion and runout before initiating a cut.