MIR / MIL Carbide Micro Boring Bars | 55° / 60° Internal Threading

MIR / MIL Carbide Micro Boring Bars

Solid-carbide micro boring bars for small-hole internal threading and related internal machining. The range includes right-hand MIR and left-hand MIL variants with 55° and 60° thread profiles.

Key Features

• Fine-grain carbide construction for rigidity, toughness and wear resistance.
• Coated cutting edge to reduce friction and edge wear during internal machining.
• Designed for small-hole threading and compatible precision internal operations.
• Multiple shank diameters and cutting lengths are available for different bore sizes and reach requirements.

Thread Options

Available with 55° and 60° internal thread profiles. Select the MIR or MIL series, thread angle, shank diameter and cutting length from the variant menu.

Selection

Confirm the thread form, minimum bore diameter, cutting direction and required reach before ordering. Use conservative cutting parameters on small diameters and minimize tool overhang where possible.