Micro 100 QTH-105 Boring Grooving Bar Holder

Product Description

The MICRO 100 QTH-105 is a quick-change boring and grooving bar holder designed to securely mount small-diameter boring and grooving bars in compatible quick-change tooling systems. It features a 0.1875 inch (3/16 inch) inside diameter bore to accept the tool shank and a 0.6250 inch (5/8 inch) outside diameter body. The head diameter measures 0.7500 inch. Overall length is 2.8 inches. The QTH-105 includes coolant-through capability, allowing cutting fluid to be directed to the tool tip for improved chip evacuation and tool life on deep-bore and grooving operations.

This bar holder is intended for use in CNC turning centers, lathes, and manual turning applications where quick-change tooling setups are required. It is well suited for precision internal grooving and boring work on small-diameter bores in production and job-shop environments. Machinists and tooling setters working with the QTH series quick-change system will find it fits into that standardized platform directly.

Key Features

• 0.1875 inch inside diameter accepts standard 3/16 inch boring and grooving bar shanks
• 0.6250 inch outside diameter body for rigid, low-profile clamping
• 0.7500 inch head diameter for secure seating in quick-change holders
• Coolant-through design directs fluid to the cutting zone for improved performance
• 2.8 inch overall length suits compact tooling setups on small lathes and turning centers
• Part of the QTH series quick-change tooling system for consistent, repeatable setups

Compatibility

Designed for use within the MICRO 100 QTH series quick-change tooling system. Accepts boring and grooving bars with a 3/16 inch (0.1875 inch) shank diameter.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician with the machine powered down and in a locked-out, tagged-out state before any tooling changes are made. Ensure the bar shank is clean and free of burrs before inserting into the holder bore. Verify coolant-through passages are clear and aligned with the machine spindle coolant supply before operation. Follow the machine tool manufacturer torque and clamping guidelines for the quick-change system in use.