Precision CNC Turning Parts Supplier
CNC turning is one of the most efficient methods for producing cylindrical parts with exceptional accuracy. The workpiece rotates at high speed while a computer-controlled cutting tool precisely removes material — delivering consistent results every time.
At CMS, our CNC lathes support a full range of turning operations including: Facing · Boring · Drilling · Threading · Knurling · Grooving · Taper Turning · Reaming
Whether you need simple pins and shafts or complex rotational components, our turning centers handle it all — with speed and precision you can count on.
Maximum part size for CNC turning
| Part size limitations | Metric units | Imperial units |
|---|---|---|
| Maximum swing diameter | 400 mm | 15.7 inch |
| Maximum machining diameter | 360 mm | 14.2 inch |
| Maximum processing length | 1000 mm | 39.37 inch |
| Bar Through-Hole Diameter | 65 mm | 2.55 inch |
| Maximum processing weight | 150 kg | 330 lb |
Latest CNC Turning Cases
Check out some of CMS’s most recent CNC turning projects. Each one shows how good we are at precision machining, controlling tight tolerances, and getting great surface finishes in a variety of industries.
Why Choose us？
CMS is a trusted manufacturing partner for precision CNC turning because it has cutting-edge equipment, engineering know-how, and ISO-certified quality systems that make sure every part is made correctly every time.
Our CNC Turning Capabilities
CMS uses high-tech CNC and Swiss-type lathes to do CNC turning on metal and plastic parts with tolerances as low as ±0.005 mm. We work with aluminum, stainless steel, steel alloys, brass, copper, titanium, and engineering plastics like POM, ABS, PTFE, PEEK, and PC. CMS can do everything from prototype to mass production, including turn-milling, threading, boring, and hard turning. They also do finishing and heat treatment in-house.
10+
Years Focus on CNC Machining
20+
Precision CNC Lathes
5000+
Project Delivered
Metals
- Aluminum (2024, 5052, 6061, 6063, 6082, 7075 etc.)
- Stainless Steel (303, 304, 304L, 316, 316L, 17-4PH, 410, 420, etc.)
- Steel (1018, 1045, 4140, 4340, 40Cr, etc.)
- Tool Steel (D2, A2, O1)
- Brass, Bronze, Copper
- Titanium (Grade 1, 2, 5)
Plastics
We maintain strict tolerance control to ensure precision and consistency in all CNC turned parts.
General Tolerance (ISO 2768-m)
| Feature Type | Tolerance Range |
|---|---|
| Linear Dimensions | ±0.01 – ±0.05 mm |
| Diameters (Shaft/Hole) | ±0.01 – ±0.02 mm |
| Length | ±0.02 – ±0.05 mm |
| Angular Dimensions | ±0.5° |
High Precision Tolerance
| Feature Type | Tolerance |
|---|---|
| Critical Diameter | ±0.005 mm |
| Concentricity | 0.005 mm |
| Roundness | 0.003 mm |
Surface Roughness
| Process Type | Ra Value |
|---|---|
| Standard Turning | Ra 1.6 – 3.2 μm |
| Fine Turning | Ra 0.8 – 1.6 μm |
| Precision Finish | Ra ≤ 0.8 μm |
Custom tolerances can be achieved based on material, geometry, and production requirements.
We offer a variety of surface finishing options for CNC turned parts to improve appearance, durability, and performance.
- Anodizing – Enhances corrosion resistance and surface hardness (for aluminum parts)
- Electroplating – Zinc, nickel, or chrome plating for improved corrosion and wear resistance
- Polishing – Achieves smooth and shiny surfaces for precision components
- Sandblasting – Uniform matte finish and removal of machining marks
- Black Oxide – Provides mild corrosion resistance for steel parts
- Brushing – Creates a consistent linear texture for decorative finishes
Custom surface finishes are available based on your requirements.
Turning Processes Offered
- CNC turning
- Swiss-type turning
- Turn-milling compound machining
- Thread cutting & thread rolling
- Grooving, knurling, drilling, boring, facing
- Parting & contour turning
- Internal & external features machining
- Hard turning
Quality Assurance
We ensure the highest quality standards for all CNC turned parts through strict inspection and process control.
- Precision Tolerance Control – Up to ±0.01 mm
- Advanced Inspection Equipment – CMM, micrometers, calipers, and gauges
- In-Process & Final Inspection – Quality checks at every production stage
- Material Certification – Traceable raw materials upon request
- Consistent Batch Quality – Stable production for mass manufacturing
Certified to ISO9001, IATF16949, and ISO13485, we guarantee reliable and repeatable quality.
Application
CNC Turned parts can be used in various fields of manufacturing, whether it is mechanical automation, robotics, medical, aviation, automobiles, motorcycles, energy, consumer electronics manufacturing, creative design modification, and personal DIY industries.
Get in touch today
Customer Reviews
“Esay to work”
Easy to work with, great communicator, quick response, flexible on product design, delivers as promised! An awesome experience all around!
Steve
“Outstanding Work”
It has been a pleasure working together on this project and will be doing business for years to come highly recommend
Shona Jones
“Good Parts “
Great to work with Parts were produced as per drawing with precision Delivery date was on time Looking forward to working with them for more jobs
Pedro
How to work with us?
Frequently Questions
If you have any questions in the process of product design and manufacturing, you can contact us to obtain expert support and provide the best solution for your product. Get support now ！
Knowledges from CMS
CNC Turning Tips
Lathe cutting tools types: turning, facing, boring, grooving, threading & parting — with tool material selection, geometry (rake, nose radius) & surface finish guide.
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CNC turning and milling compared: process differences, tolerances, when to use each, turn-mill machining for hybrid parts & cost comparison guide.
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What is CNC turning: how it works, tolerances ±0.010–0.025 mm, turning vs milling, operations (threading, boring, grooving) & DFM guidelines for round parts.
