Harvey Tool 70028 Thread Mill 8-32 3 Flute Solid Carbide

Product Description

The HARVEY TOOL 70028 is a solid carbide helical flute thread mill designed to cut 8-32 unified coarse threads in both internal and external applications. With a 3-flute helical geometry, it produces clean thread profiles in a single helical interpolation pass. The 0.1150-inch cutting diameter and 0.1250-inch shank diameter make this tool suited for small-diameter threading work where rigidity and precision matter. A bright, uncoated finish keeps the cutting edges sharp and is well suited for non-ferrous metals and plastics. Machinists and toolroom operators working on precision components, fastener seats, and threaded inserts rely on this type of tool for efficient, repeatable thread production on CNC machining centers.

This thread mill is appropriate for use in precision machining environments, including job shops, aerospace component shops, and general manufacturing. It handles 8-32 threads in both through-hole and blind-hole configurations, as well as external thread profiles on small-diameter bosses. The 0.2500-inch length of cut accommodates standard thread engagement depths for this thread size. A minimum nominal bore diameter of 0.1640 inches is required for internal threading applications.

Key Features

• Cuts both internal and external 8-32 threads with a single tool
• 3-flute helical flute geometry for efficient chip evacuation and clean thread form
• Solid carbide construction for rigidity and wear resistance
• Bright, uncoated finish suited for non-ferrous materials and plastics
• 0.1150-inch cutting diameter with 0.1250-inch shank for small-bore applications
• 2.0000-inch overall length provides clearance in typical CNC setups

Compatibility

Designed for use in CNC machining centers capable of helical interpolation for 8-32 thread milling in internal and external applications. Minimum nominal bore diameter for internal threading is 0.1640 inches.

Installation Notes

Thread milling requires a CNC control with helical interpolation capability. Verify correct tool offset and diameter compensation before cutting. Secure workpiece firmly to prevent vibration at small cutting diameters. Follow machine tool manufacturer guidelines for spindle speed and feed rate selection appropriate to the workpiece material.