Osg 4100002511 Thread Mill 7/8-14 Unf 4 Flute Solid Carbide

Product Description

The OSG 4100002511 is a solid carbide helical flute thread mill designed for cutting 7/8-14 UNF internal threads in a single helical pass. With 4 flutes and an EXO coating, it delivers consistent thread form and extended tool life in demanding machining environments. The cutting diameter is 0.7450 inches, the length of cut is 1.3580 inches, and the overall length is 4.0000 inches. It mounts on a 3/4-inch shank and is part of OSG Series 41000. Machinists and CNC operators working in job shops, production facilities, and tool rooms rely on this style of thread mill for precise UNF threading on ferrous and non-ferrous workpieces.

This thread mill is suited for right-hand helical thread milling operations on machining centers with 3-axis interpolation capability. It is appropriate for residential and commercial manufacturing applications where UNF thread forms are required, particularly in aerospace, automotive, and general industrial component production. The 14 TPI specification targets standard 7/8-14 UNF thread profiles. The EXO coating improves surface hardness and heat resistance, making this tool a fit for dry or minimal-quantity lubrication machining strategies.

Key Features

• Solid carbide construction for rigidity and dimensional stability during thread interpolation
• EXO coating enhances wear resistance and extends tool life in abrasive materials
• 4 helical flutes with right-hand flute direction for efficient chip evacuation
• 14 TPI cuts standard 7/8-14 UNF thread profiles in a single helical pass
• 0.7450-inch cutting diameter with 1.3580-inch length of cut for adequate thread depth
• No coolant-through design; compatible with external coolant or minimal lubrication setups

Compatibility

Designed as a direct-fit thread milling tool for CNC machining centers accepting a 3/4-inch straight shank toolholder, used to produce 7/8-14 UNF internal threads per the input specifications of Series 41000.

Installation Notes

Installation and operation should be performed by qualified machinists or CNC programmers familiar with helical interpolation thread milling cycles. Secure the 3/4-inch shank in a properly sized collet chuck or end mill holder, verifying runout before operation. Confirm the machining center is programmed for the correct helical interpolation direction and pitch to match the 7/8-14 UNF thread specification. Do not use this tool on manual machines not capable of simultaneous 3-axis motion.