Custom Online CNC Machining Services

Online CNC machining services for rapid prototypes and production parts. Get instant CNC quotes today, and order your custom metal and plastic parts.

10s

Instant Quotes

1 day

Lead time

0 pc

MOQ

0.010 mm

Tolerances

Our CNC Machining Services

If you need custom machined parts with complex geometries, or get end-use products in the shortest possible time, RapidDirect is good enough to break through all of that and achieve your idea immediately. We operate over 150 sets of 3, 4, and 5-axis CNC machines, and offer 100+ different types of materials and surface finishes, guaranteeing quick turnaround and quality of one-off prototypes and production parts.

CNC Milling

CNC milling removes materials from the workpiece to create custom-designed parts with flat surface using cutting tool or multi-point milling cutters.

WIth our 3-axis & 5-axis CNC milling services, you can get milled parts with tight tolerance up to 0.02mm (±0.0008 in.)

CNC Turning

CNC turning shears materials from the ouside of a rod at incredible speeds using a spinning tool. At RapidDirect, we apply 50+ CNC lathes and CNC turning centers to create round or cylindrical turned parts with extreme precision that consistantly meet customers’ expectations.

Quote in Seconds, Operate at Your Fingertips

RapidDirect provides a AI-powered, hassle-free online quotation platform that can help simplify your ordering and manufacturing process. Stop wasting time in emails, get interactive quotes with DFM analysis within seconds, optimize your orders immediately, compare your multiple quotes side by side, manage your orders in one place.

Instant Quotation

Get instant CNC quotes in a minute by simply uploading your design files. Our big data quoting engine calculates CNC machining quotes instantly and provides you with competitive prices.

DFM Feedback

Our platform built with an advanced machine learning algorithm can automatically identify part geometry that may be difficult to machine. Give you a comprehensive design-for-manufacturing analysis for your custom CNC parts within minutes.

All-in-One Order Management

Quickly check, search, and manage all your CNC orders in one place. What's even better is that you get visibility into all stages of the production process and every aspect of the manufacturing operation.

From CNC Prototyping to Production

CNC machining is a computerized and versatile manufacturing process ideal for rapid prototyping and on demand production. Here are the custom CNC services available at the RapidDirect.

Rapid Prototyping

With our instant quotation platform and strong capacity, you can get excepted prototypes in short lead times. This allows you to quickly test prototype parts and get them to market.

Bridge Production

Bridge-to-production is critical for closing the gap between the part design and the actual product rollout. No worries. Our professional engineering team is always ready to provide practical design suggestions for your low volume machined parts.

On-Demand Production

Our full service for on-demand production orders ensures that you get high precison and high standard of quality products. Enhanced production rate also allows for just-in-time delivery of production parts.

Let's Start A New Project Today

CNC Machining Tolerances and Standards

With precision CNC machining services, RapidDirect is your ideal partner to create precision machined prototypes and parts. Our standard CNC machining tolerances for metals is ISO 2768-f and for plastics is ISO 2768-m. We can also achieve special tolerances as long as you indicate your requirements on your drawing.

Standards	CNC Milling	CNC Turning
Maximum Part Size	4000×1500×600 mm 157.5×59.1×23.6 in.	200×500 mm 7.9×19.7 in.
Minimum Part Size	4×4 mm 0.1×0.1 in.	2×2 mm 0.079×0.079 in.
Minimum Feature Size	Φ 0.50 mm Φ 0.00197 in.	Φ 0.50 mm Φ 0.00197 in.
Standard Tolerances	Metals: ISO 2768-f Plastics: ISO 2768-m	Metals: ISO 2768-f Plastics: ISO 2768-m
Linear Dimension	+/- 0.025 mm +/- 0.001 in.	+/- 0.025 mm +/- 0.001 in.
Hole Diameters (Not Reamed)	+/- 0.025 mm +/- 0.001 in.	+/- 0.025 mm +/- 0.001 in.
Shaft Diameters	+/- 0.025 mm +/- 0.001 in.	+/- 0.025 mm +/- 0.001 in.
Edge Condition	Sharp corner will be removed in the form of a chamfer or radius. The size of the chamfer, or resulting radii, must be indicated on the drawing.
Threads and Tapped Holes	Diameter: Φ 1.5-5 mm, depth: 3×diameter Diameter: Φ 5 mm or more, depth: 4-6×diameter	Diameter: Φ 1.5-5 mm, depth: 3×diameter Diameter: Φ 5 mm or more, depth: 4-6×diameter
Threads and Tapped Holes	RapidDirect can produce threads of any specification and size required by our customers.
Text	Minimum width of 0.5 mm, depth of 0.1 mm RapidDirect can use CNC engraving or laser carving to create standard text based on customers’ requirements.	RapidDirect can use laser marking to create standard text for CNC turned parts.
Lead Time	5 business days	5 business days

Materials for Custom CNC Machining Parts

A numebr of materials can be used in CNC machines, giving you various of options to complete rapid prototyping to production runs of custom complex parts. For your manufacturing needs, we provide instant quotatios of 100+ metals and plastics, and even you can compare prices for different machining materials.

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Aluminum
Copper
Brass
Stainless Steel
Titanium
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	PEEK	HDPE	PET
Nylon	PTFE	PVC	PP
ABS	PC	PMMA

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Surface Finishes for CNC Machining

CNC machining leaves visible tool marks during the process of removing portions of the block’s surface to create desired shapes. If don’t want as-machined parts, select a surface finishing for your custom parts. At RapidDirect, we offer several common surface finishes that help improve functionality and aesthetics.

Name

Description

Materials

Color

Texture

Link

Anodizing	Anodizing improves corrosion resistance, enhancing wear resistance and hardness, and protecting the metal surface. Widely used in mechanical parts, aircraft, and automobile parts, precision instruments, etc.	Aluminum	Clear, black, grey, red, blue, gold.	Smooth, matte finish.	Learn More>>
Bead Blasting	Bead blasting results in parts with a smooth surface with a matte texture. Used mainly for visual applications and can be followed by other surface treatments.	ABS, Aluminum, Brass, Stainless Steel, Steel	n/a	Matte	Learn More>>
Powder Coating	Powder coating is a type of coating that is applied as a free-flowing, dry powder. Unlike conventional liquid paint which is delivered via an evaporating solvent, powder coating is typically applied electrostatically and then cured under heat or with ultraviolet light.	Aluminum, Stainless Steel, Steel	Black, any RAL code or Pantone number	Gloss or semi-gloss	Learn More>>
Electroplating	Electroplating can be functional, decorative or corrosion-related. Many industries use the process, including the automotive sector, in which chrome-plating of steel automobile parts is common.	Aluminum, steel, stainless steel	n/a	Smooth, glossy finish	Learn More>>
Polishing	Polishing is the process of creating a smooth and shiny surface, either through physical rubbing of the part or by chemical interference. The process produces a surface with significant specular reflection, but in some materials is able to reduce diffuse reflection.	Aluminum, Brass, Stainless Steel, Steel	n/a	Glossy	Learn More>>
Brushing	Brushing is a surface treatment process in which abrasive belts are used to draw traces on the surface of a material, usually for aesthetic purposes.	ABS, Aluminum, Brass, Stainless Steel, Steel	n/a	satin	Learn More>>

Ultimate Guide to CNC Machining

The comprehensive guide provides you with the basics, design considerations, materials, surface finish, cost, and more about CNC machining to help you create quality machined parts with aesthetic appearance.

Download it now

Gallery of CNC Machined Parts

Check out our extensive gallery that shows precision machined prototypes and parts from our valued customers.

Why Choose Our Custom CNC Machining Service

See What Our Customers Say About Us

A customer’s words have a more substantial impact than a company’s claims – and see what our satisfied customers have said regarding how we fulfilled their requirements.

From the instant and accurate quotation to production process to the timely delivery of parts, RapidDirect responded to our demands with complete professionalism. They handled every aspect of this CNC machining project quickly and cost-effectively. We will surely work with them again in the future.

Mark Alford

– Chief Engineer

RapidDirect has been our quality supplier of CNC machined parts. Fast delivery is very important for our business, and RapidDirect always offers short lead time and competitive pricing. Andy responds fast to all our emails and questions. This has improved our working relationship, and we continue to value this partnership.

Piscary Herskovic

– Product Designer

Hi, Fiona. I’d like to thank you and everybody at RapidDirect for contributing to the great service we received. You constantly handle our difficult CNC machining projects, and offer instant quotation and free DFM analysis for the part design. Best of all, you show superior quality in short lead times. Our department supervisor confirmed that you will continue making these parts now. The quality is outstanding!

Luc Szorc

– Mechanical Engineer

Our small R&D group requires high precision CNC machined parts within short periods. RapidDirect consistently delivers these parts at great values and quick turnarounds. The reliability of this company places them above our other part suppliers.

Kayne Espinosa

– Project Manager

We asked RapidDirect to fabricate parts for a critical supplier demo, and you came through with a short lead time. Your work is always high quality, and we are grateful for your precision in machining components. The help in checking our designs and material selection has also saved our company from making expensive errors. We look forward to doing future projects with you guys.

Hari Mackenzie

Learn More

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Frequently Asked Questions

1. What are your maximum dimensions for CNC machining?

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.

2. What are the tolerances of machined parts?

We can provide critical tolerance according to your actual demand.

For CNC machining, we manufacture metal parts as per ISO 2768-m and plastic parts as per ISO 2768-c. Please note that the higher tolerance needed, the cost will be higher.

3. What’s your CNC machining capacity?

We can serve more than 10000 pcs of different prototypes monthly, no matter the part with simple or complex design. We own 120 CNC machines and have more than 100 experienced technical experts.

4. How much does your CNC machining service cost?

The cost of your CNC machining projects is not fixed as it depends on the characteristics of your project such as the design, and tolerances. Machining times of the material to be used in the project also contribute to this pricing. For example, if you’re making a part that has a combined machining and material cost of $2 and a setup cost of $200, one part will cost $202. However, if you make 200 parts, each would cost $3!

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CNC Machining Tolerances and Standards

Materials for Custom CNC Machining Parts

Aluminum

Copper

Brass

Stainless Steel

Titanium

Plastics

Surface Finishes for CNC Machining

Gallery of CNC Machined Parts

Why Choose Our Custom CNC Machining Service

Online Instant Quote & DFM Analysis

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See What Our Customers Say About Us

Our CNC Machining for Various Industrial Applications

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