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The MICRO 100 BT-4 is a single-point box turning tool bit designed for internal turning and boring operations on lathes and turning centers. It features a solid carbide tip for durability and wear resistance in demanding cutting applications. The shank measures 0.25 x 0.25 inches with an overall length of 1.5 inches, making it a compact, precise insert suited for small-bore box turning work. Right-hand cutting direction is standard. This tool is typically installed and used by machinists, toolmakers, and CNC lathe operators working with ferrous and non-ferrous materials.
The BT-4 is used in lathe and turning center applications where internal box turning is required. Its compact 0.25-inch shank profile allows it to fit into tight tool holders and small-bore setups. The solid carbide tip provides consistent cutting performance across a range of materials. This bit is appropriate for precision machine shops, job shops, and production environments where repeatable internal turning geometry is required.
Designed as an OEM-style replacement or direct-fit tool bit for standard BT-style box turning tool holders accepting a 0.25 x 0.25 inch shank.
Installation is performed by machinists or CNC lathe operators following standard tooling setup procedures. Ensure the machine spindle is fully stopped and power is isolated before changing or seating the tool bit in the holder. Secure the shank firmly in the tool holder to the manufacturer-specified clamping method before initiating any cutting operation. Inspect the solid carbide tip for chips or wear before each use, as carbide is brittle and a damaged tip can affect cut quality and workpiece finish.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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