Micro 100 TH-108 Boring Grooving Bar Holder

Product Description

The MICRO 100 TH-108 is a boring and grooving bar holder designed to securely mount small-diameter boring and grooving bars in CNC lathes and turning centers. It accepts bar shanks with a 0.375 inch inside diameter and features a 0.625 inch outside diameter body with an overall length of 2.75 inches. The head diameter measures 0.75 inches. Part of the MICRO 100 TH series, this holder is machined to close tolerances to provide rigid, concentric bar support during internal grooving and boring operations. It is sized for light to medium-duty work on small-bore applications and is used by machinists and toolroom professionals running precision turning operations.

The TH-108 is suited for use in small-part production environments where accurate internal grooving and boring are required. It fits tooling setups on manual lathes and CNC turning centers with appropriate tool post or turret mounting systems. The compact overall length of 2.75 inches and 0.625 inch body diameter make it a practical choice for tight tooling arrangements and short-overhang setups. This holder does not include coolant-through capability, so external coolant application should be planned accordingly when machining materials that generate significant heat.

Key Features

• 0.375 inch inside diameter accepts matching boring and grooving bar shanks
• 0.625 inch outside diameter body for compact tooling station fitment
• 0.75 inch head diameter for positive bar retention and rigidity
• 2.75 inch overall length supports minimal overhang in turning setups
• Part of the MICRO 100 TH series for consistent tooling system compatibility
• No coolant-through design simplifies holder construction and reduces cost

Compatibility

Designed as an OEM-style boring and grooving bar holder for use with 0.375 inch shank boring and grooving bars in manual and CNC lathe tooling systems.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. The machine spindle must be powered down and all motion fully stopped before mounting or adjusting toolholders. Ensure the mating bar shank diameter matches the 0.375 inch bore of this holder before assembly. Verify that the tool post or turret slot dimensions are compatible with the 0.625 inch body OD prior to installation.