Harvey Tool 70022-C3 Thread Mill 6-32 3 Flute Solid Carbide

Product Description

The HARVEY TOOL 70022-C3 is a solid carbide helical flute thread mill designed to cut 6-32 unified coarse threads in both internal and external applications. With a 0.1000-inch cutting diameter, a 3-flute geometry, and an AlTiN coating, it delivers clean thread profiles in harder workpiece materials while managing heat at the cutting edge. The 1/8-inch (0.1250-inch) shank diameter keeps the tool rigid in small-bore applications. At 2.0000 inches overall length with a 0.2180-inch length of cut, this tool suits shallow-to-moderate thread depth requirements in precision machining environments. Licensed machinists and CNC programmers typically run this tool on vertical machining centers or CNC mills.

This thread mill is suited for precision machining of 6-32 threaded features in aerospace, electronics, medical device, and general manufacturing applications. It handles both internal threads in through-holes or blind holes and external thread profiles on small-diameter workpieces. The minimum nominal diameter of 0.1380 inches defines the smallest bore it will thread internally. It is a single-tool solution for shops running small-fastener thread forms where a single-point approach would be impractical.

Key Features

• Cuts 6-32 threads at 32 TPI in both internal and external configurations
• Solid carbide construction for rigidity and wear resistance in ferrous and hardened materials
• AlTiN coating improves heat resistance and extends tool life in dry or semi-dry cutting conditions
• 3-flute helical geometry balances chip evacuation and cutting stability in small-diameter bores
• 0.1000-inch cutting diameter and 0.1380-inch minimum nominal diameter support tight-clearance internal threading
• 2.0000-inch overall length provides reach while the 0.2180-inch length of cut limits deflection

Compatibility

Designed as an OEM-style thread milling tool for CNC machining centers capable of helical interpolation and compatible with 1/8-inch collet or end mill holders accepting a 0.1250-inch shank diameter.

Installation Notes

This tool requires a CNC machine capable of helical interpolation — it is not a tap and cannot be used in a drill press or manual tapping operation. Secure the 0.1250-inch shank in a precision collet holder to minimize runout before threading operations. Verify spindle speed, feed rate, and helical pitch programmed in the CAM or G-code match the 6-32 thread specification before cutting. Coolant-through is not available on this tool; use external coolant or cutting fluid appropriate for the workpiece material.