Online CNC Machining Services
Custom CNC machining parts machining services for rapid prototyping, new product introduction and low-volume production.
- Online instant quoting
- 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 quotations in a minute by simply uploading your design files. Our big data quoting engine calculates online CNC quotations at competitive price.
DfM feedback
Check automatic manufacturability analysis of your parts online for FREE. Save the time checking with a technician on your designs before production.
All-in-one order management
Check and manage all your quotations and orders status at ease. Get notifications at every production updates, never worry about the machining progress again.
Our online 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 and precision CNC machining services. We provide more than 100 different types of materials and surface finishes with experience in a seamless transtion from prototype through production. Lead time as short as days.
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) Cost-effective CNC milling parts manufacturer for prototype machining and production parts.
CNC Turning Service
Self-owned workshop with 50+ CNC Lathes and CNC turning centers, providing cost-effective prototype and production 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
Materials for CNC Machining Parts
CNC machining have a long list of available materials for CNC 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 precision machined 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
What is CNC Machining
About the CNC Process
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.
CNC FAQs
How large of a part or panel can be CNC machined?
The maximum size sheet metal parts we are able to mill in a single setup is 4' x 8'. The maximum size bar stock that we are able to mill in a single setup is 26" x 16" x 12".
What is the smallest part or panel that can be CNC machined?
The minimum sheet metal part that can be vacuum-chucked without clamps is 5" x 5". Vices can be used for smaller parts. Please email info@rapiddirect.com for more details.
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.
Why was my CNC order quoted thicker than I intended?
The material used to CNC machine your design will always have a standard thickness tolerance, so it is part of our standard procedure to quote your design with some extra thickness.
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