Iscar 6403941 Single Point Threading Tool Internal Carbide

Product Description

The ISCAR 6403941 is a solid carbide single point threading tool designed for internal thread milling and threading operations on small-diameter bores. It targets right-hand internal threads from 36 to 48 TPI with a 60-degree profile angle, making it suitable for fine-pitch work in confined geometries. The minimum threading diameter is 0.1181 inches, the cutting depth reaches 0.315 inches, and the overall length is 0.8661 inches. A TiAlN coating provides heat and wear resistance during dry or semi-dry machining. This tool is used by machinists and toolroom technicians working on CNC lathes, mills, or screw machines where small internal thread forms are required.

This tool is suited for internal threading operations in small-bore components found in precision machining environments including aerospace, medical device, and general manufacturing applications. The 0.1181-inch shank diameter matches the threading diameter, allowing it to enter tight bores. The 0.01-inch projection from edge and 0.0118-inch projection from center allow controlled engagement in restricted clearance situations. Right-hand thread direction is standard for the majority of conventional threading setups encountered in production machining.

Key Features

• Solid carbide construction for rigidity and dimensional stability in small-diameter threading
• TiAlN coating for elevated heat resistance and extended tool life in dry or minimal-coolant conditions
• 60-degree profile angle covers unified and metric fine-pitch thread forms
• 36 to 48 TPI range targets fine-pitch internal threads in small-bore work
• 0.1181-inch minimum threading diameter suits micro and miniature component applications
• No coolant-through design; compatible with external coolant delivery setups

Compatibility

Designed as an OEM-style replacement or direct-use solid carbide threading tool for internal right-hand thread applications requiring a 60-degree profile, 36 to 48 TPI range, and a minimum bore diameter of 0.1181 inches.

Installation Notes

Installation and use of this tool should be performed by a qualified machinist familiar with CNC or manual threading operations. Ensure the machine spindle and toolholder are powered down and locked out before mounting or removing the tool. Verify shank-to-holder concentricity and runout before engaging the workpiece, as small-diameter carbide tooling is sensitive to misalignment and prone to fracture under lateral load. Do not exceed the recommended depth of cut for the workpiece material, and confirm thread direction programming matches the right-hand designation of this tool before initiating a threading cycle.