Micro 100 TH-208 Boring Grooving Bar Holder

Product Description

The MICRO 100 TH-208 is a boring grooving bar holder designed to secure grooving bars during internal boring operations on a lathe or machining center. It features a 0.375 inch inside diameter bore and a 0.750 inch outside diameter body, with an overall length of 2.75 inches. The head diameter measures 0.875 inches, providing a stable clamping interface for the cutting bar. Part of the TH series from MICRO 100, this holder is built for machinists and toolroom operators who require precise, repeatable bar positioning in tight-tolerance grooving applications. Coolant-through capability is not included on this holder.

The TH-208 is suited for use in production and toolroom environments where internal grooving or boring operations are performed on lathes, turning centers, or similar machine tools. It is applicable to both small-batch job shop work and higher-volume production runs where consistent tool holding geometry is required. The compact overall length and 3/4 inch body diameter make it appropriate for setups with limited clearance or smaller workpiece bores.

Key Features

• 0.375 inch inside diameter accommodates TH-series boring and grooving bars
• 0.750 inch outside diameter body for secure mounting in standard tool holders
• 0.875 inch head diameter provides a firm clamping shoulder
• Overall length of 2.75 inches suits compact and standard lathe setups
• No coolant-through channels - simplified, low-maintenance design
• Part of the TH series for consistent fitment across the MICRO 100 grooving bar line

Compatibility

Designed as an OEM-style holder for MICRO 100 TH-series boring and grooving bars with a 3/8 inch shank diameter. Confirm bar shank diameter and body OD clearance against your specific tool post or turret before installation.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Power down and lock out the machine spindle before mounting or adjusting the bar holder in the turret or tool post. Verify that the holder OD is compatible with your machine's tool holding interface and that all clamping screws are tightened to the machine manufacturer's specifications before beginning a cut. Do not exceed the cutting bar manufacturer's recommended depth-of-cut or feed rate for the grooving bar being held.