Harvey Tool 987103-C3 Thread Mill 3/4-16 Internal Solid Carbide

Product Description

The HARVEY TOOL 987103-C3 is a solid carbide helical flute thread mill designed for cutting internal 3/4-16 UN threads. It carries a 4-flute geometry and an AlTiN coating that extends tool life in high-heat cutting environments. With a 0.5800-inch cutting diameter and a 1.875-inch length of cut, this tool is built for long-reach applications where standard-length thread mills cannot access the full thread depth. It is used by machinists and tool-and-die professionals in CNC milling operations requiring precise, single-point-style thread interpolation in a helical path.

This thread mill is suited for internal threading operations on CNC machining centers running UN thread forms. The long-flute, long-reach design makes it appropriate for deep-bore threading on production parts, fixtures, and tooling components. It belongs to the Thread Milling Cutters Multi-Form Long Flute UN Threads series, which covers a range of unified thread sizes for general metalworking applications. No coolant-through capability is present, so external coolant or air blast should be directed at the cutting zone during use.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard and abrasive materials
• AlTiN coating improves thermal resistance and reduces tool wear at elevated cutting temperatures
• 4-flute helical geometry provides smooth thread form and efficient chip evacuation
• 1.875-inch length of cut enables threading in deep-bore or long-reach applications
• 3/4-16 UN internal thread form at 16 teeth per inch for precise unified thread production
• 5/8-inch shank diameter for secure tool holding in standard ER or shrink-fit collet chucks

Compatibility

Designed for internal 3/4-16 UN thread milling on CNC machining centers. Compatible with standard 5/8-inch tool holders including ER collets and hydraulic chucks. Part of the Thread Milling Cutters Multi-Form Long Flute UN Threads series.

Installation Notes

Installation and operation of this tool should be performed by qualified machinists familiar with CNC thread milling cycles and helical interpolation programming. Verify spindle speed and feed rate against the manufacturer cutting data for the workpiece material before starting the cut. Ensure the tool holder is clean and the shank is fully seated to the correct gauge length before tightening. External coolant or air blast should be directed at the cutting zone, as this tool does not support coolant-through delivery.