Scientific Cutting Tools TMLR234-28ELA Thread Mill 5/16-28

Product Description

The SCIENTIFIC CUTTING TOOLS TMLR234-28ELA is a solid carbide helical flute thread mill designed for cutting internal 5/16-28 UN threads in machining applications. It features a 3-flute, right-hand flute direction configuration with a 0.2340-inch cutting diameter and a long-reach design that allows access to deeper thread features. The AlTiN+ coating provides elevated heat and wear resistance, making this tool well-suited for ferrous and hard materials at production cutting speeds. Machinists and CNC programmers working in precision thread milling operations will find this tool appropriate for tight-tolerance internal thread work.

This thread mill is intended for internal thread milling on CNC machining centers using helical interpolation. It is suited for production and job-shop environments where a single tool must produce a precise 5/16-28 UN internal thread without a dedicated tap. The long-reach geometry accommodates thread features that extend deeper into the workpiece. With no coolant-through capability, this tool is typically paired with flood or mist coolant delivered externally at the spindle or fixture level.

Key Features

• Solid carbide submicron-grade construction for rigidity and edge retention
• AlTiN+ coating for improved wear and heat resistance in ferrous and hard materials
• 3-flute, right-hand helical flute design for efficient chip evacuation during internal thread milling
• Long-reach thread mill type for access to deeper internal thread features
• Cuts 5/16-28 UN internal threads with a 0.2340-inch cutting diameter
• 0.8500-inch length of cut accommodates a full thread depth engagement

Compatibility

Designed for use on CNC machining centers capable of helical interpolation for cutting 5/16-28 UN internal threads. Compatible with standard 1/4-inch shank toolholders including collet chucks and shrink-fit holders.

Installation Notes

Installation and operation should be performed by a qualified CNC machinist or tooling technician. Secure the shank in a balanced, rigid toolholder with adequate clamping force before initiating any cutting cycle. Verify spindle speed, feed rate, and helical interpolation parameters in the CNC program against the manufacturer tooling data before running the first part. Inspect the cutting edges for wear or chipping after each production run and before reinstalling in a new setup.