Scientific Cutting Tools SPTM620FA-5LA Acme Thread Mill

Product Description

The SCIENTIFIC CUTTING TOOLS SPTM620FA-5LA is a single profile Acme thread mill designed for internal threading operations in CNC machining applications. Built from submicron-grade solid carbide and coated with AlTiN+, this tool handles Acme thread profiles at 5 TPI across a nominal diameter range of 1 inch to 1-1/4 inches. The 5-flute design balances chip evacuation with surface finish quality. A cutting diameter of 0.62 inches and neck diameter of 0.35 inches allow access into bored features while maintaining rigidity. Overall length is 4 inches with a 5/8 inch shank for secure toolholder engagement. Machinists and CNC programmers working in job shops, toolrooms, and production environments will find this tool suited to lead screw, fixture, and mechanical actuator thread work.

This thread mill is used for cutting internal Acme threads in materials where carbide tooling is appropriate, including steel, stainless steel, cast iron, and non-ferrous alloys. The AlTiN+ coating improves wear resistance and heat tolerance, extending tool life in dry or minimal-quantity lubrication (MQL) machining strategies. The neck length of 1.75 inches provides clearance for threading deeper bores without shank interference. Typical applications include lead screw nuts, linear actuator components, and fixture clamping elements requiring Acme thread forms.

Key Features

• Submicron-grade solid carbide construction for hardness and edge retention
• AlTiN+ coating for elevated heat resistance and extended tool life
• 5 TPI Acme thread profile, internal, covering 1 inch to 1-1/4 inch nominal diameters
• 5-flute geometry for balanced chip load and finish quality
• 0.35 inch neck diameter with 1.75 inch neck length for deep bore access
• 4 inch overall length with 5/8 inch shank for standard toolholder compatibility

Compatibility

Designed for CNC machining centers capable of helical interpolation; compatible with standard 5/8 inch bore toolholders. Cuts internal Acme threads in the 1-5 to 1-1/4-5 thread size range at 5 TPI.

Installation Notes

Thread milling requires a CNC machining center with helical interpolation capability programmed to the correct Acme thread pitch and depth. Ensure the toolholder is properly torqued and the shank is fully seated before running. Verify workpiece is securely fixtured and all axes are within program limits before initiating the toolpath. Coolant-through is not available on this tool; use external coolant or MQL as appropriate for the workpiece material.