CNC Thread Milling Service

Are you looking for a better way to make threads? CNC thread milling might be just what you need! This modern way of making threads uses special rotating tools to cut perfect internal and external threads. It works way better than old-style tapping for many jobs.

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23 Years

Istar Machining's years in the industry

300,000 square feet

The size of Istar Machining's factory

300 CNC machines

Our CNC equipment count

1000 skilled workers

Istar's number of skilled machinists/operators

What is CNC Thread Milling?

CNC thread milling uses a special spinning tool that moves in a spiral path to create threads. Unlike tapping, the tool doesn’t need to be the same size as the thread. One tool can make many different thread sizes!

Our CNC milling service experts use thread milling for both inside and outside threads with super high accuracy.

Why Choose Thread Milling Over Tapping?

Thread milling has big advantages over old-style tapping:

No broken toolsin blind holes (the tool doesn’t have to back out)
Better thread finishwith smoother surfaces
One tool makes many thread sizes, saving money
Works on hard materialsthat would break taps
Great for large threadswhere taps would be too expensive

As experts in CNC prototype machining, we know when thread milling is the best choice for your project.

Thread Milling in Different Industries

Thread milling is perfect for many industries. Here’s where we use it most:

Aerospace

We mill high-strength threads in turbine blades using Inconel 625. These parts must be perfect with no room for error. The threads need to hold together even in extreme heat.

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Automotive

Engine blocks and suspension parts need strong, precise threads. We use thread milling for these parts because it creates stronger threads than tapping.

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Medical

Medical implants and surgical tools need perfect threads that won't fail. We can mill threads in both stainless steel and plastic medical parts with accuracy to ±0.001".

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Oil & Gas

Pipeline fittings with NPT threads must not leak under pressure. We mill these threads with perfect form to make sure they seal tight every time.

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Our Thread Milling Tools and Materials

We use only the best tools for CNC thread milling:

Tool Type	Coating	Best For	Features
Solid Carbide	Nano AlTiN	Aerospace parts, Inconel 625	Heat resistant, long life
Helical Flute	TiCN	Stainless steel, automotive parts	Excellent chip evacuation
Multi-form Thread Mills	ZrN	Medical parts, small threads	Can cut M1.6 threads without breaking
Indexable Insert	None	Large pipe threads, oil & gas	Cost-effective for big threads

Our tools work on a huge range of materials:

Hard metals like stainless steel, titanium, and Inconel 625
Soft metals like aluminum and brass
Non-metals like plastics and composites
Even special materials for medical and aerospace use

How We Use CNC Thread Milling

Our process makes sure you get perfect threads:

Programming: We create special G-code for each thread type
Tool Selection: We pick the best tool based on material and thread size
Spindle Speed: We set the right speed for your material (100-10,000 RPM)
Test Cut: We make a sample thread and check it before making all your parts
Quality Check: We use thread gauges to verify every thread meets specs

Benefits of Our CNC Thread Milling Service

When you choose Istar Machining for thread milling, you get:

Perfect threadsevery time with ±0.001″ tolerance
Cost savingsfrom faster production and less tool breakage
Ability to make custom threadsthat aren’t standard
No spindle reversal needed, making the process faster
Repairs for damaged threadsin expensive parts
Thread milling in hard-to-machine materialslike Inconel 625

CNC Thread Milling vs. Tapping: A Simple Comparison

Still not sure which is better? Check out this comparison:

Feature	Thread Milling	Tapping
Tool Cost	Higher initial cost	Lower initial cost
Thread Quality	Very high, perfect finish	Good in soft materials only
Material Range	Works in all materials	Limited in hard materials
Thread Size Range	One tool for many sizes	One tool per size
Risk of Tool Breaking	Very low	High in blind holes
Chip Evacuation	Excellent, no clogging	Can clog in deep holes
Speed	Slower for small threads	Faster for small, simple threads
Complex Threads	Can make special threads	Limited to standard threads