Scientific Cutting Tools SPTM745 Single Profile Thread Mill

Product Description

The SCIENTIFIC CUTTING TOOLS SPTM745 is a solid carbide single profile thread mill designed for cutting both internal and external threads in the 1-1/4-4 to 1-1/4-8 thread size range, spanning 4 to 8 TPI. Built from submicron-grade solid carbide with a bright/uncoated finish, this tool delivers consistent thread geometry across a broad TPI range with a single tool setup. The 6-flute configuration supports efficient chip evacuation and smooth cutting action. With a 0.745-inch cutting diameter, 0.750-inch shank, and 5-inch overall length, it fits standard CNC milling setups used in machining and toolroom environments.

This thread mill is suited for machine shops, toolrooms, and manufacturing facilities requiring precise thread milling on larger-diameter fastener features. It handles both internal bores and external boss threads, making it a versatile option for fixtures, adapters, flanges, and similar components. The single profile design allows thread pitch adjustment through programmed helical interpolation, giving operators flexibility across the supported TPI range without changing tools. Licensed machinists and CNC operators working in job shop or production environments are the primary users of this tool.

Key Features

• Cuts internal and external threads from 4 to 8 TPI in the 1-1/4 thread size range
• Submicron-grade solid carbide construction for wear resistance and dimensional stability
• 6-flute design promotes efficient chip removal during thread milling cycles
• Bright/uncoated finish suitable for a range of workpiece materials
• 0.400-inch neck diameter with 1.500-inch neck length provides clearance in deeper bores
• Single profile geometry allows pitch flexibility via CNC helical interpolation

Compatibility

Designed for use on CNC machining centers capable of helical interpolation. Compatible with standard 3/4-inch tool holders including ER collet chucks and end mill holders. Intended for thread milling applications in the 1-1/4-4 to 1-1/4-8 thread size range on internal and external features.

Installation Notes

Installation and operation of this tool should be performed by qualified CNC machinists or toolroom personnel. Secure the 3/4-inch shank in a properly sized, clean collet or end mill holder and confirm runout before production cutting. Power down and lock out the spindle before any tool change or holder adjustment. Thread milling programs must use helical interpolation; verify the CNC program pitch and direction match the intended thread specification before running.