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CNC Threading Service
CNC threading is a way to make precise screw threads using computer-controlled machines. At Istar Machining, we create perfect threads on many types of parts. Our machines follow exact instructions to cut spiral grooves into metal, plastic, and other materials.
Think of threads like the spirals on a screw or inside a nut. They need to match perfectly to work well. Our CNC machining service uses special tools to make threads that meet strict standards.
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20+ Years
Istar Machining's years in the industry
300,000 square feet
The size of Istar Machining's factory
856 CNC machines
Our CNC equipment count
2000+ skilled workers
Istar's number of skilled machinists/operators
Top Metal Alloys for CNC Threading
We can make threads in almost any material. Here’s what we commonly use:
Metals
Stainless Steel
Aluminum
Titanium
Brass and Copper
Tool Steel & High-Speed Steel (HSS)
Stainless Steel
Stainless steel is super strong and does not rust! It’s used in many places.
Best Kinds:
- 304: Good for most jobs
- 316: Best for wet places like boats
Where It’s Used:
- Doctor tools that need to be clean
- Boat parts that get wet
- Food machines that must stay clean
Watch Out: It can get hard when cut and wear out tools fast.
Aluminum
Aluminum is light and easy to work with! It’s a top pick for many jobs.
Best Kinds:
- 6061: Good all-around
- 7075: Very strong for its weight
Where It’s Used:
- Plane parts that need to be light
- Car parts that don’t need to be too heavy
- Bike parts that need to be strong but light
Watch Out: Use oil when cutting or it can stick to tools.
Titanium
Titanium is super strong but light. It’s also great for use in the body.
Best Kind:
- Ti-6Al-4V: The kind most jobs use
Where It’s Used:
- Plane engines that get very hot
- Body parts like hip joints
- Bike frames that need to be very strong
Watch Out: Hard to cut and tools get hot fast.
Brass and Copper
Brass and copper are soft but conduct heat and power very well.
Where They’re Used:
- Pipe parts for water
- Power parts that need to pass electricity
- Boat parts that won’t rust
Watch Out: These are soft so threads can get damaged.
Tool Steel & High-Speed Steel (HSS)
These steels are made to be very hard and stand up to lots of wear.
Best Kinds:
- D2: Good for most wear needs
- M2: Great for high heat
Where They’re Used:
- Thread cutting tools themselves
- Molds for making parts
- Dies for shaping metal
Non-Metal
Plastic
Composites
Plastic
Plastics can be light and won’t rust. They also can be cheaper than metal.
Best Kinds:
- Delrin: Strong and stiff
- Nylon: Tough and wears well
- PTFE: Slick and works in hot places
Where They’re Used:
- Food machines that need to be clean
- Pool parts that get wet
- Car dash parts you can see
Watch Out: They can melt if tools get too hot. They can also get bigger or smaller with heat.
Composites
Composites are mixed materials that can be very strong for their weight.
Best Kind:
- Carbon fiber with plastic: Very strong and light
Where It’s Used:
- Race car parts that need to be light
- Plane parts that need to be very strong
- Bike frames that need to be stiff
Istar Machining: CNC Threaded Products
Industries We Serve
Thread Sizes We Can Make
We can make threads as small as M1 (1mm) up to M120 (120mm) in metric sizes. For inch-based threads, we go from tiny #0-80 screws up to large 2″ pipe threads.
Common thread sizes we make:
- M3, M4, M5, M6 (small metric)
- M8, M10, M12 (medium metric)
- 1/4″-20, 5/16″-18, 3/8″-16 (common inch)
- 1/2″ NPT, 3/4″ NPT (pipe threads)
Special Threading Services
Multi-Start Threads
These special threads have multiple “starts” that let screws advance faster when turned. They’re used in:
- Quick-release connectors
- Bottle caps
- Camera lens mounts
Left-Hand Threads
Most threads tighten clockwise, but some need to go the opposite way. We make left-hand threads for:
- Gas fittings
- Special automotive parts
- Safety equipment
Custom Thread Profiles
When standard threads won’t work, we can make custom profiles for:
- Proprietary systems
- Extra-strong connections
- Special sealing requirements
Quality Assurance
Every threaded part we make goes through strict testing:
- Thread gauges check if threads fit correctly
- Optical comparators measure thread angles
- CMM machines verify critical dimensions
- Ultrasonic testing finds any hidden flaws
Thread Milling vs. Thread Cutting
We offer two main ways to make threads:
Thread Milling
CNC thread milling uses a spinning tool to cut threads. This works well for:
- Larger thread sizes
- Harder materials
- When you need very precise threads
Thread Cutting (Single-Point)
This traditional method uses a single tool that moves along the part. It’s good for:
- High production speeds
- Certain material types
- When a perfect finish is needed
Why Customers Choose Istar Machining
ISO 9001 Certified
Our quality system meets global standards
Fast Turnaround
Prototype threads in 48 hours
Expert Engineers
Our team solves tough threading challenges
Competitive Pricing
Fair rates for both small and large orders
Modern Equipment
The latest CNC threading technology
Get Started With Our CNC Threading Service
Ready to order precision-threaded parts? Here’s how:
Send us your drawings
CAD files or simple sketches
Tell us your needs
Material, quantity, deadline
Get a free quote
Usually within 24 hours
Review our suggestions
We might have ideas to improve your design
Approve production
We'll make your parts exactly to spec
Contact Istar Machining Today
Need perfect threads for your next project? Contact us NOW!
Istar Machining – Where precision threading meets innovation.
Frequently Asked Question
A: We follow ISO, ASME, and DIN standards, plus custom specifications if needed.
A: We can make threads as small as M1 (1mm) or #0-80 (inch).
A: Prototypes in 2-3 days, production runs in 5-7 days typically.
A: Yes! We can measure your sample and make exact matches.
A: Yes, we can fix damaged threads or re-cut them to new sizes.
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