Online CNC Machining Services
Get instant CNC machining quotes for custom machined parts. Precision CNC machining services for prototype and production machining.
- Online instant quoting
- Automatic DFM feedback
- Lead time as fast as 1 day
- Tolerance as tight as ±0.02 mm
Save 30% on average!
Innovative technologies that upgrade custom CNC parts machining experience
Instant quote
No more waiting for email replies, get instant CNC quotes in a minute by simply uploading your design files. Our big data quoting engine calculates instant manufacturing quotes at competitive price.
DfM feedback
Check automatic manufacturability analysis of your custom CNC machined parts online for FREE. Save time checking your designs with a technician before production.
All-in-one order management
Check and manage all your CNC machining quotes and orders status at ease. Get notifications at every production update, never worry about the custom CNC prototyping progress again.
Our Custom CNC machining services
With over 200 sets of 3, 4, and 5-axis CNC machines in China, RapidDirect is your ideal choice for outsourcing custom machined parts and precision machining services. We provide more than 100 different types of materials and surface finishes with experience in a seamless transition from prototype machining through production machining.
CNC Milling Service
3-axis CNC milling price rate from $10 per hour, 5-axis CNC milling center highest tolerance up to ±0.0008″ (0.02 mm) Precision CNC milling parts online machine shop for prototype machining and production.
CNC Turning Service
CNC machining parts manufacturer with 50+ CNC Lathes and CNC turning centers, providing cost-effective precision machining services with fast lead times. Live tooling available for complex projects.
Our experience in numbers
3000+
Companies served
200,000+
Parts produced
50+
Countries shipped
10+
Years in business
Preferred Online Prototyping and Manufacturing Services
Hunt Dabney
The 4 parts look great and work very well. This order was to solve a problem on some equipment, so only the 4 parts were needed.
We were very pleased with your quality, cost and delivery, and will certainly order from you in the future. I have also recommended you to friends who own other companies.
Bjorn Steinar Blumenstein
The service at RapidDirect is phenomenal and Cherry has assisted us with great patience and understanding.
Great service as well as the product itself, exactly what we asked for and works amazingly. Especially considering the small details we were requesting. Good looking produckt.
Lars Gerchow
I couldn’t be happier with this order. The quality is as quoted and the lead time was very not only very fast and it was done on schedule.
The service was absolute world-class. Thanks a lot to Linda Dong from the sales team for the outstanding assistance. Also, the contact with the engineer Laser was top-notch.
Kaushik Bangalore
Hi June, Yes we picked up the product and it looks great!
Thank you for your quick support in getting this done. We will be in contact shortly for future orders 🙂
Materials for CNC Machining Parts
CNC machining has a long list of available materials for custom prototypes and manufacturing parts, from hard metals like stainless steel and titanium, to soft metals such as aluminum, copper, brass, all the way to plastics including ABS, PC, PA, etc.
Aluminum
Aluminum is a highly ductile metal, making it easy to machine. The material has a good strength-to-weight ratio and is available in many types for a range of applications.
Copper
Copper displays excellent thermal conductivity, electrical conductivity and plasticity. It is also highly ductile, corrosion resistant and can be easily welded.
Brass
Brass has desirable properties for a number of applications. It is low friction, has excellent electrical conductivity and has a golden (brass) appearance.
Stainless Steel
Stainless steel is the low carbon steel that offers many properties that are sought after for industrial applications. Stainless steel typically contains a minimum of 10% chromium by weight.
Titanium
Titanium has a number of material properties that make it the ideal metal for demanding applications. These properties include excellent resistance to corrosion, chemicals and extreme temperatures. The metal also has an excellent strength-to-weight ratio.
Plastics
Plastics are also very popular option for CNC machining because of its wide choices, relatively lower price, and significantly faster machining time needed. We provide all common plastics for CNC machining services.
- POM
- Nylon
- ABS
- PEEK
- PTFE
- PC
- HDPE
- PVC
- PMMA
- PET
- PP
CNC Machining Surface Finishes
Apart from custom CNC milling and turning services, we also provide complete surface finishing options for custom CNC machining parts.
Anodizing
Bead Blasting
Powder Coating
Electroplating
Polishing
Brushing
CNC Machining Tolerance
Our standard tolerances for CNC machining of metals is DIN-2768-1-fine and for plastics is DIN-2768-1-medium. Tolerances are greatly affected by part geometry and type of material. For case-by-case studies, please contact us with email for details.
| Type | Tolerance |
| Linear dimension | +/- 0.025 mm +/- 0.001 inch |
Hole diameters (not reamed) | +/- 0.025 mm +/- 0.001 inch |
Shaft diameters | +/- 0.025 mm +/- 0.001 inch |
Part size limit | 950 * 550 * 480 mm 37.0 * 21.5 * 18.5 inch |
Our Quality Promise
- ISO 9001:2015
- Full dimensional report
- Material certification
- First article inspection
- Rework & refund policy
CNC FAQs
What is CNC Machining
CNC, or computer numerical control machining, is a subtractive manufacturing method that leverages a combination of computerized controls and machine tools to remove layers from a solid block of material. The desired cuts in the metal are programmed according to corresponding tools and machinery, which perform the machining task in an automated fashion.
How large of a part or panel can be CNC machined?
RapidDirect can accommodate the prototyping and production of large machined parts, plastic or metal. Our maximum CNC machining build envelope is 2000 mm x 1500 mm x 300 mm — suitable even for large-scale parts such as furniture and architectural components.
What kind of a finish does CNC machining leave?
Due to the spinning motion produced by the CNC milling machine's cutter, the surface finish of CNC machined parts will have visible toolmarks. If you require a smooth, unblemished finish to your part, we recommend choosing a secondary finish: grained finish (can only be applied to the outside of machined enclosures due to geometry) or powdercoat.
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