Micro 100 TH-104 Boring Grooving Bar Holder

Product Description

The MICRO 100 TH-104 is a boring and grooving bar holder designed to secure small-diameter boring and grooving bars in CNC lathes and turning centers. Part of the TH series, this holder features a 0.125 inch inside diameter bore and a 0.625 inch outside diameter body, with an overall length of 2.75 inches and a head diameter of 0.75 inches. It is machined to close tolerances, providing rigid, repeatable bar positioning during internal grooving and boring operations. Machinists and toolroom professionals install this holder when running small-bore insert tooling that requires a stable, compact holder body.

The TH-104 is suited for use in small-bore internal grooving and boring applications on CNC lathes, manual lathes, and turning centers where bar clearance and rigidity are critical. Its compact OD of 0.625 inches allows access to confined bores. The 2.75 inch overall length accommodates standard tool post and turret setups found in light-duty and medium-duty turning operations. This holder accepts bars with a shank diameter of 0.125 inches, making it appropriate for fine-bore grooving work.

Key Features

• 0.125 inch inside diameter bore accepts small-shank boring and grooving bars
• 0.625 inch outside diameter body for use in confined bore clearance situations
• 0.75 inch head diameter for positive bar retention and rigidity
• 2.75 inch overall length suits standard turret and tool post mounting
• Part of the MICRO 100 TH series for consistent tooling system compatibility
• No coolant-through design - standard dry or flood coolant environment use

Compatibility

Designed for use with boring and grooving bars with a 0.125 inch shank diameter. Part of the MICRO 100 TH series tooling system.

Installation Notes

Installation should be performed by a qualified machinist following the machine tool manufacturer's tool post or turret mounting procedures. Power down and lock out the machine before installing or removing the holder. Verify bar clamp screw torque and bar protrusion length per the boring bar manufacturer's guidelines before initiating a cut. Confirm all set screws are fully engaged and bar is properly seated before resuming machine operation.