Product Specifications and Ordering Information

This document details specifications for thread milling tools with two shape types: Type A and Type B. Dimensions are provided in millimeters, and prices are listed in Japanese Yen (JPY). When ordering, customers must specify the thread size (MMTM (M)). The tools feature a micro grain carbide material with Mugen Coating for enhanced durability.

Code No.	Thread Size (M)	Diameter (D)	Pitch (P)	Effective Length (ℓ)	Type	Neck Diameter (d2)	Neck Taper Angle (γ°)	Shank Diameter (d)	Overall Length (L)	Number of Flutes	Thread Milling Size	Retail Price (JPY)
06-00002-00100	M1	0.72	0.25	2.64	A	0.36	30°	4	45	4	M1, M1.1	9,000
06-00002-00200	M2	1.5	0.4	5.02	B	0.89	12°	4	45	6	M2, M2.3	15,000
06-00002-00400	M4	3.08	0.7	8.8	B	2.08	12°	6	60	6	M4	16,500
06-00002-00600	M6	4.72	1	12.6	B	3.35	12°	6	60	6	M6	16,500

Key Features:

• Multiple cutting edges enable highly efficient thread milling.
• Tool design focuses on sharpness to improve cutting accuracy.
• Mugen Coating extends tool life significantly.

Thread Milling Operation and Procedure

The thread milling process involves selecting a drill size that matches the minor diameter tolerance of the internal thread and drilling a pilot hole to the required depth. The thread milling tool is then inserted to the processing depth and moved helically, advancing one pitch per revolution to form the thread.

• Helical radius is gradually increased to adjust the cutting depth.
• Down-cut milling is the recommended cutting direction for most sizes.
• Tool runout must be considered when selecting drill diameter.

NC program generation software is available for download from the manufacturer's website to assist in programming the milling process.

Application Example: Titanium Alloy (Ti-6Al-4V) M2 Internal Thread Milling

Tool Size	Work Material	Spindle Speed (min-1)	Feed (mm/min)	Thread Size	Thread Length	Guide Hole Diameter	Coolant	Work Size	Processing Time
MMTM M2	Ti-6Al-4V	10,000	500	M2×0.4	4.8 mm	φ1.6 (depth 5.6 mm)	Water Soluble Cutting Fluid	φ50	9 seconds per hole

This example demonstrates maintainable 6H precision for over 250 holes, confirming tool durability and consistent accuracy.

Recommended Milling Conditions

The document provides detailed recommended cutting parameters for various thread sizes and materials including carbon steel (S50C), stainless steel (SUS304), titanium alloy (Ti-6Al-4V), and aluminum alloy (A5052). Parameters include spindle speed, feed rate, feed per tooth, helical radius, and cutting direction (up-cut or down-cut).

Thread Size	Diameter (D)	Pitch (P)	Helical Radius (R)	Cutting Direction	Spindle Speed (min-1)	Feed (mm/min)	Feed per Tooth (mm/tooth)
M1	0.72	0.25	R0.155	Up-cut	35,000 (Carbon Steel)	600	0.004
M2	1.5	0.4	R0.28	Down-cut	12,000 (Carbon Steel)	600	0.008
M4	3.08	0.7	R0.5	Down-cut	5,700 (Carbon Steel)	400	0.012
M6	4.72	1	R0.68	Down-cut	3,200 (Carbon Steel)	400	0.021

Notes and Recommendations

• Cutting conditions assume water-soluble cutting fluid and dividing the depth of cut into two passes.
• Pre-drilling pilot holes is essential before thread milling.
• Adjust spindle speed, feed, number of passes, and cutting direction based on specific machining environment.
• Helical radius values correspond to JIS 2nd grade thread tolerance (5H for M1.4 and below, 6H for M1.6 and above).
• Ensure pilot hole diameter avoids interference with the neck area of the tool when using recommended helical radius.
• Apply zero-cut process if the thread is tapered.
• Use coolant appropriate for the work material.

Contact and Additional Information

Manufacturer: NS Tool Co., Ltd.
Address: 5F Shinminamioi Bldg., 1-13-5, Minamioi, Shinagawa-ku, Tokyo 140-0013 Japan
Tel: +81-3-3763-4619 (Export Dept.)
Fax: +81-3-3763-2280
Website: http://www.ns-tool.com

Additional sizes and expanded product lineup are available. Safety considerations and software support for NC program creation are provided.