Scientific Cutting Tools TM345-19BSPP Thread Mill Bspp 4 Flute

Product Description

The SCIENTIFIC CUTTING TOOLS TM345-19BSPP is a straight flute thread mill designed to cut British Standard Pipe Parallel (BSPP) threads at 19 TPI. It handles both external and internal thread milling in a single tool, with a 0.345-inch cutting diameter and a 0.811-inch length of cut. Built from submicron solid carbide with a bright uncoated finish, this tool delivers consistent thread geometry in ferrous and non-ferrous materials. The 3/8-inch shank diameter provides rigid clamping in standard milling chucks or collet holders. Machinists and tool-and-die professionals specify this cutter for precision BSPP thread production on CNC machining centers.

This thread mill is suited for shops producing or servicing fluid system components, hydraulic fittings, and instrumentation ports that require BSPP thread forms. It covers two nominal thread sizes - 1/4-19 BSPP and 3/8-19 BSPP - from a single tool, reducing tooling inventory. The 3.5-inch overall length provides clearance for most workholding setups without excessive overhang. Typical applications include manifold blocks, valve bodies, and pipe fittings machined in job shop and production environments.

Key Features

• Cuts both 1/4-19 BSPP and 3/8-19 BSPP threads - external and internal - with one tool
• Submicron solid carbide construction for edge retention in demanding materials
• 4 straight flutes with bright uncoated finish for versatile material compatibility
• 0.345-inch cutting diameter with 0.811-inch length of cut for controlled thread engagement
• 3/8-inch shank diameter fits standard ER and milling chuck toolholders
• No staggered tooth and no coolant-through design - straightforward setup on standard CNC mills

Compatibility

Designed for CNC machining centers capable of helical interpolation; produces 1/4-19 BSPP and 3/8-19 BSPP thread forms per British Standard Pipe Parallel specifications in both external and internal configurations.

Installation Notes

Thread milling requires a CNC control capable of helical interpolation - confirm this capability before programming. Secure the 3/8-inch shank in a balanced, runout-minimized collet or milling chuck and verify tool projection before cutting. Power down the spindle and follow lockout/tagout procedures when loading or changing the tool. Do not use in manual mill operations; this tool is designed exclusively for CNC thread milling cycles.