Micro 100 TH-207 Boring Grooving Bar Holder 3/4 Od

Product Description

The MICRO 100 TH-207 is a boring and grooving bar holder designed to secure small-diameter boring and grooving bars in CNC lathes and manual turning centers. With a 0.75 inch outside diameter, a 0.3125 inch inside diameter bore, and an overall length of 2.75 inches, the TH-207 provides a compact, rigid clamping solution for precision internal machining operations. The 0.875 inch head diameter offers additional support at the cutting end. This holder is part of the MICRO 100 TH series and is installed by machinists and toolroom technicians working with small-bore applications.

The TH-207 is suited for use in turning centers and lathes where small-diameter internal boring and grooving operations are required. It accepts bars with a 0.3125 inch shank and fits into 0.75 inch tool holders or turret positions. Typical applications include precision internal grooving, undercutting, and bore finishing on small workpieces in production and job-shop environments. This holder does not include coolant-through capability, making it appropriate for dry or flood-coolant setups where through-tool delivery is not needed.

Key Features

• 0.3125 inch inside diameter accepts standard small-diameter boring and grooving bars
• 0.75 inch outside diameter fits standard lathe turret and tool block positions
• 0.875 inch head diameter for added rigidity at the cutting interface
• 2.75 inch overall length for compact tooling setups
• Part of the MICRO 100 TH series for consistent fitment across the line
• No coolant-through design - compatible with flood or dry cutting environments

Compatibility

Designed as a TH-series boring and grooving bar holder for use with boring and grooving bars having a 0.3125 inch shank diameter, installed in tool positions accepting a 0.75 inch outside diameter holder.

Installation Notes

Installation is performed by a qualified machinist or toolroom technician. Power down and lock out the spindle before mounting or removing any tooling. Ensure the bore and holder shank are clean and free of chips or debris before seating the bar to maintain concentricity. Follow the machine manufacturer's torque and clamping guidelines for the specific turret or tool block in use.