Micro 100 TH-84 Boring Grooving Bar Holder 0.125 Id

Product Description

The MICRO 100 TH-84 is a boring and grooving bar holder designed to securely retain small-diameter boring and grooving bars during internal machining operations. Built to the TH series standard, it accepts a bar with a 0.125 inch inside diameter and features a 0.500 inch outside diameter shank with a head diameter of 0.625 inches. The overall length is 2.750 inches. This holder is intended for use on CNC lathes, manual lathes, and turning centers where precision internal grooving or boring work is performed by machinists and tool and die professionals.

The TH-84 is suited for small-bore internal grooving and boring applications in production and job-shop environments. Its compact dimensions make it appropriate for tight-clearance work where larger holders cannot be used. The holder is compatible with turning setups requiring a 0.500 inch OD shank. Coolant-through capability is not available on this model, so external coolant delivery should be used when chip evacuation or heat management is needed during cutting operations.

Key Features

• 0.125 inch inside diameter accepts small boring and grooving bars for fine internal work
• 0.500 inch outside diameter shank fits standard lathe tooling positions
• 0.625 inch head diameter provides secure bar retention and support at the cutting zone
• 2.750 inch overall length suits compact turning center setups
• TH series design for consistent fitment across compatible MICRO 100 boring bar tooling
• No coolant-through - external coolant delivery required for fluid-assisted cutting

Compatibility

Designed as an OEM-style replacement and standard tooling component for lathes and turning centers accepting a 0.500 inch OD shank holder with a 0.125 inch bore, consistent with MICRO 100 TH series boring and grooving bar systems.

Installation Notes

Installation is performed by qualified machinists following standard lathe tooling procedures. Ensure the machine spindle is fully stopped and the machine is in a safe, locked-out state before mounting or removing toolholders. Verify that the bar shank is clean and free of debris before seating it in the holder bore. Follow the machine tool manufacturer torque guidance for toolholder set screws and confirm tool runout after installation before commencing any cutting operation.