Osg 4100001511 Thread Mill 7/16-20 Unf Solid Carbide

Product Description

The OSG 4100001511 is a helical flute thread mill designed for cutting 7/16-20 UNF internal threads in a single helical pass. Built from solid carbide and finished with OSG EXO coating, this tool delivers consistent thread geometry and extended tool life in ferrous and non-ferrous materials. It runs 3 flutes in a right-hand flute direction, spins on a 3/8-inch shank, and produces threads at 20 teeth per inch (TPI). The cutting diameter measures 0.3500 inches with a length of cut (LOC) of 0.7010 inches and an overall length (OAL) of 3.0000 inches. This tool belongs to the OSG Series 41000 and is suited for CNC machining centers capable of helical interpolation.

This thread mill is used in precision machining applications where tapping is impractical or where a single tool must handle multiple thread depths. It is appropriate for job shops, production machining, aerospace, automotive, and general metalworking environments. The 7/16-20 UNF specification makes it a common choice for fastener bores in mechanical assemblies requiring fine-thread engagement. Coolant-through is not supported on this tool, so external flood or mist coolant is the standard approach for chip evacuation and heat management.

Key Features

• Solid carbide construction for rigidity and wear resistance in demanding thread milling operations
• EXO coating reduces friction and improves tool life across a range of workpiece materials
• Helical flute geometry supports efficient chip evacuation during CNC interpolation cycles
• 3-flute design balances cutting load and surface finish on 7/16-20 UNF threads
• Right-hand flute direction compatible with standard CNC thread milling G-code routines
• No coolant-through requirement simplifies tooling setup on machines without internal coolant spindles

Compatibility

Designed for use on CNC machining centers capable of helical interpolation; fits standard 3/8-inch tool holders and collet chucks for thread milling applications.

Installation Notes

Thread mills must be run in a CNC machining center using a helical interpolation cycle — do not use in manual drilling or tapping operations. Confirm tool holder runout is within acceptable limits before use, as excess runout directly affects thread quality and tool life. Power down the spindle and follow lockout/tagout procedures before loading or unloading the tool. External coolant or mist is recommended to manage heat and clear chips when coolant-through is not available.