Custom Online CNC Machining Services

Searching for a reliable and efficient supplier of machined metal and plastic components? If yes, then RJCmold is here to cater to your requirements. We have hundreds of CNC machines under our roof which ensures that we ship all the parts on-time. Quick turnaround machining is what we are known for!RJCmold can handle low-volume production and rapid prototyping. Get in touch with us today.

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RJCmold – Your custom CNC machining parts reliable partner for high-quality

We provides excellent global services and has a large, rapidly growing customer base. Our customers are spread around the world and come from a wide variety of industries. It covers from independent inventors or designers to large scale Industrial, Commercial, Medical, Automotive, and even Aerospace companies. We will always do our best to meet your design and manufacturing needs, and help your ideas come to life.
RJCmold provides a variety of online custom CNC machining services including milling, turning, EDM, wire EDM and surface grinding. With precision 3-, 4- and 5-axis CNC machining centers, combined with other advanced capabilities and our experienced team, we can handle all types of CNC machining parts in both metal and plastic materials. Whether you need prototypes or production parts machining, our online CNC machining service will be your best choice. Request your online quote today to get your machining parts done in as little as 5 days!

Is Your Machining Partner Reliable?

You can find plenty of CNC machining factory, but finding one you can actually count on is another story. If you’ve ever worked with an unreliable machining partner, then you know how stressful and frustrating it can be every time parts are unavailable, out of spec, or delayed.

At RJCMOLD, we believe you should be able to get the parts you need, when you need them. You shouldn’t have to fight with your CNC machining factory to get things done; instead, you should feel confident they’re working with you to help you keep production on schedule with high-quality parts.

For us, you’re not just another order, and we’ll work with you so you get quality work, on time, from people who care — every day.

Production CNC Machining Services

Delivering Quality Parts & Lasting Partnerships Since 2003!

Advanced Manufacturing

With the integration of robotics and advanced CMM systems, we minimize human error while increasing the trustworthiness of our products.
Our various machines provide a diverse amount of capabilities and are engineered to provide world class products with unmatched quality.

Value Added Services

On-top of Precision CNC machining and milling services, we also offer additional services and over all value added services to lower your lead time & cost.

  • Laser Engraving
  • Custom Bagging
  • Annealing/Heat Treat
  • Passivation & Sanitization
  • Staking & Hydraulic Assembly
  • Product Engineering

Quality Standards & Documentation

Along with our FM Approval* we also offer:

  • Certificate of Conformance
  • Material Test Reports
  • Quality Documentation: PPAP/SPAP
  • Inspection reports available upon request
  • Packing list with scannable bar codes

*FM Approval for some products.

Our CNC Services

rjcmold provides custom CNC milling and turning services. Learn more about what services we offer.

CNC Milling

CNC milling is a subtractive manufacturing process that uses 3-axis milling and 5-axis indexed milling processes to cut solid plastic and metal blocks into final parts.

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CNC Turning

CNC turning with live tooling combines both lathe and mill capabilities to machine parts with cylindrical features from metal rod stock.

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RJC CNC Machining Design Guidelines and Capabilities

  • Maximum Part Size: Milled parts up to 80” x 48” x 24” (2,032 x 1,219 x 610 mm). Lathe parts up to 62” (1,575 mm) length and 32” (813 mm) diameter.
  • Standard Lead Time:  3 business days
  • General Tolerances: Tolerances on metals will be held to +/- 0.005″ (+/- 0.127 mm) in accordance with ISO 2768 unless otherwise specified. Plastics and composites will be +/- 0.010”.
  • Precision Tolerances: RJC can manufacture and inspect to tight tolerances per your drawing specifications including GD&T callouts.
  • Minimum Feature Size: 0.020” (0.50 mm). This may vary depending on part geometry and chosen material.
  • Threads and Tapped Holes: RJC can accommodate any standard thread size. We can also machine custom threads; these will require a manual quote review.
  • Edge Condition: Sharp edges are broken and deburred by default
  • Surface Finish: The standard finish is asmachined: 125 Ra or better. Additional finishing options can be specified when getting a quote.
  • Internal corner fillets: Design internal corner fillets to be 0.020” – 0.050” greater than a standard drill size for the radii. Follow a drill diameter to depth ratio of 1:6 (1:4 recommended) as a guideline for internal corner radii.
  • Floor fillets: Design floor fillets smaller than corner fillets to allow the same tool to clear material from the interior.
  • Undercuts: Always design undercuts to standard sizes and away from corners so they are accessible by the cutting tool.
  • Tapped/threaded hole depth: Provide tool clearance slightly beyond the tapped hole depth to ensure complete threads.
  • Complexity: Keep the number of small cuts to a minimum to reduce costs; only design in the necessary features to balance function with aesthetic.

Why Choose Us for Custom CNC Machining?

Quality Is Always a Top Priority at RJCmold

Whether you choose us for milling services, turning, lathe machining or any other CNC precision machining application, you can always count on RJCmold to perform work that will exceed your quality expectations. As an ISO 9001 and AS9100 certified company, we adhere to the CNC machining industry’s highest quality standards. We’ve implemented the most stringent quality control procedures in every aspect of our operation to ensure the total satisfaction of our customers.

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What is CNC machining?

Subtractive manufacturing (CNC machining) is a machining process in which machines carve a solid piece of raw material into a desired 3D geometrical shape and size using a controlled material removal process. This process relies heavily upon the use of machine tools and power and hand tools.

The application of Computer Numerical Control (CNC) matches the need of the modern industry. CNC uses computers to control the movement and operation of mills, lathes, and other cutting machines. However, subtractive manufacturing is broadly adapted to manufacture metal products, wood, plastic, ceramic, and composites materials.

Historically, the subtractive machining process was manual. Processes such as woodcarving, forging, and filling of metals, once done by hand, have undergone rapid advancements over the past century and now broadly incorporate technology that makes them more efficient and precise.

Benefits of Using CNC Machining

Undoubtedly, there are several benefits of using CNC machining. Here are some of them.

  • You can accurately produce high volumes of the same part with precise dimensions. If manually done, this is a mundane and repetitive task which will definitely lead to errors and lack of precision. By partnering with a precision CNC machining services provider, you can be assured of structural and dimensional accuracy of parts, regardless of the volume required.
  • It reduces time and increases productivity or OEMs, quick assembling, as well as time to market of products.
  • Since this is subtractive manufacturing technique, CNC machining leads to less wastage. With the design already in place, one can rightly estimate the material quantity, and other aspects.
  • Once you select and run the right software program, the production will go on in iterative looping manner, till the machine is stopped. In fact, in automated process, you can set the volume and the machine will automatically stop once the required number of parts are produced.
  • CNC machining definitely wins on the safety aspect. It isolates workers from operating machines, which reduces the risk of accidents and injuries.
  • Fast turnaround times and accuracy provided by CNC machines helps OEMs across industries save resources and energy.

RJC follows ISO-2768 Standards for CNC Machining

Limits for nominal size

Metal (ISO2768-m) Plastic

0.5mm to 3mm



Over 3mm to 6mm



Over 6mm to 30mm



Over 30mm to 120mm



Over 120mm to 400mm ±0.2mm


Over 400mm to 1000mm ±0.3mm


Over 1000 mm to 2000mm ±0.5mm


Over 2000mm to 4000mm ±2mm

CNC Machining Materials

Metal CNC Machining Materials

Type Material Type Material
Aluminum Aluminum 6061-T651 Low Carbon Steel Low Carbon Steel CR 1008
Aluminum Aluminum 7075-T651 Low Carbon Steel CR Galvanized
Aluminum Aluminum AlSi10Mg Low Carbon Steel CR Galvannealed
Aluminum Aluminum 5052-H32 Stainless Steel Stainless Steel 17-4 PH
Brass Brass C260 Stainless Steel Stainless Steel 304/304L
Brass Brass C360 Stainless Steel Stainless Steel 316
Cobalt Chrome Cobalt Chrome Stainless Steel Stainless Steel 316L
Copper Copper C101 Stainless Steel Stainless Steel 303
Copper Copper C110 Steel Alloy Steel Alloy 4140
Copper Copper CuNi2SiCr Titanium Titanium Ti 6Al-4V
Inconel Inconel 718 Titanium Titanium Grade 5 6A1-4V
Low Carbon Steel Steel CR 1018

Plastic CNC Machining Materials


Material Type


ABS ABS PMMA (Acrylic) PMMA (Acrylic)
ABS ABS Flame Retardant POM (Acetal/Delrin) Acetal Homopolymer (Delrin 150)
CPVC CPVC POM (Acetal/Delrin) Acetal 20% GF (Delrin 570)
HDPE HDPE POM (Acetal/Delrin) Acetal Copolymer
LDPE LDPE POM (Acetal/Delrin) Acetal Static Dissipative (Tecaform SD)
PA (Nylon) Nylon 6 Light Blue PP PP (Polypropylene Homopolymer)
PA (Nylon) Nylon 6/6 PP PP (Polypropylene Copolymer)
PA (Nylon) Nylon 6/6 (30% GF)_Natural PPE/PS PPE/PS
PA (Nylon) Nylon 6 Black PPE/PS Noryl 265
Polycarbonate (PC) Polycarbonate (20% GF) PPSU PPSU
Polycarbonate (PC) Polycarbonate – Black PPSU Radel R 5500
Polycarbonate (PC) Polycarbonate – Clear PS PS (HIPS)
Polycarbonate (PC) Polycarbonate – Translucent PSU PSU
PEEK PEEK PTFE (Teflon) PTFE (Teflon)
PEI Ultem 1000 PVC PVC
PEI Ultem 2300 (30% GF) UHMW UHMW
PET PET UHMW Quadrant EPP Tivar 1000

Surface treatment of CNC machining service

This is our standard finish. Parts are machined and deburred, sharp edges are chamfered.

–Smooth machining is like an ‘As machined’ finish but slightly less evident machine marks. Parts are machined at a lower feed, and no hand polishing is applied.

–To reduce machining marks, parts are brushed manually with #400 – 600 grit sandpaper. Ideal to slightly reduce the roughness of the finish.

–To reduce machining marks, parts are brushed manually with #400 – 600 grit sandpaper. Ideal to slightly reduce the roughness of the finish.

–Powder coating is a strong, wear-resistant finish compatible with all metal materials.

Parts are bead blasted with glass beads, resulting in a grainy texture and reduced machining marks.

–Applicable on steels, black oxide is a conversion coating used to improve corrosion resistance and minimize light reflection.

–Parts are machined to Ra1.6μm and electroless nickel plated. Ideal for wear abrasion and corrosion resistance, not for cosmetic purposes.

–Parts are machined, and an anodizing type III coating is directly applied to the surface—ideal for improving corrosion and wearing resistance of components.

–Parts are anodized (type II) directly after machining. The most cost-effective anodizing option, ideal for non-cosmetic, functional parts. They are used to improve wear and corrosion resistance.

–Parts are manually brushed with fine sandpaper to attenuate the machining marks and then anodized. Ideal for increasing the corrosion resistance of the part. Typically results in a glossy aspect.

–Parts are brushed and electropolished. Ideal for reducing the micro-roughness of the part.

–Parts are machined, and a chromate conversion coating is applied. Ideal for increasing the part’s corrosion resistance while maintaining its conductive properties. RoHS compliant.

–Parts are bead blasted, anodized type II, and bright dipped. Results in glossy colour. Ideal for cosmetic parts needing an increase in corrosion resistance.

–Parts are bead blasted and anodized type II. Ideal for increasing the corrosion resistance of the part. Results in naturally matte colors. For glossy colors, please select the bead-blasted + glossy anodizing option.

–This is a batch-based process that tumbles vibrating media to remove sharp edges and burrs on machined parts. Tumbling can remove machine marks on exterior surfaces. Parts over 8” may require a manual review.

–Type II  (MIL-A-8625, Type II) creates a corrosion-resistant finish. Parts can be anodized in different colors—clear, black, red, and gold are most common—and is usually associated with aluminum. Type III (MIL-A-8625, Type III, Class 1/2 “hardcoat”) is thicker and creates a wear-resistant layer in addition to the corrosion resistance seen with Type II.

–A surface finish for titanium per AMS-2488 Type 2 specification. Also called Tiodize, this finish increases fatigue strength and the wear resistance of a part. Titanium anodized parts are common in aerospace and medical device manufacturing. Non-pigmented titanium anodize finishes will dull shine.

mpregnated Hard Anodize–A hard coat anodize process that embeds PTFE to create a self-lubricating, dry contact surface with Type 3 hard coat’s protective properties. This finish can be used on aluminum alloys or titanium and increases the service life of the product. This finish conforms to the AMS-2482 Type 1 Hard Coat Anodizing with Teflon (Non-Dyed).

–Improves corrosion resistance for 200 and 300 series and precipitation hardened corrosion-resistant steels. Thickness is negligible, about 0.0000001”. Conforms to ASTM A967, AMS-QQ-P-35, MIL-STD-171, ASTM A380, or AMS 2700.

–An electrochemical process cleans steel parts to reduce corrosion and improve appearance, by making the metal brighter. Removes about 0.0001”-0.0025” of the metal. Conforms to ASTM B912-02.

–Silver offers high solderability and electrical conductivity but is susceptible to tarnish. Conforms to AMS QQ-S-365D. Thickness is about 0.00002” – 0.0003.”

–Gold Plating provides good corrosion and tarnish resistance with excellent solderability. Default application specification is MIL-G-45204 and ASTM B488, CLASS 00, 0, OR 1. Thickness is about 0.00002″ – 0.00005.”

–Provides uniform zinc coating which offers protection from corrosion, oxidation, and wear on irregular surfaces. Conforms to ASTM B633-15.

– Available upon your request.

Guarantee High Quality Machined Parts

RJCmold holds multiple international certifications. Our internal procedures also define the level of quality. We hold ourselves to the highest standards to ensure your high-quality CNC machined parts.

Our equipment allows for high-precision machining from one installation. Each machine is equipped with a probe to ensure quality control also is internally adjusted to the current situation on the machine.

Our team also provides documentation such as dimensional reports and first article submissions to validate the processing and data that parts meet all necessary specifications. We also decide the rework requirements and ensure that parts are made to specification.

Our Quality Promise:
• ISO 9001, ISO 14001, ISO 45001
• Material certifications
• Full report with every order
• Intermediate measurements on the machine
• Final inspection of parts by the quality control service
• Rework & refund policy

Start Your Project With A Free Quote

RJC mold provides high quality, low cost and fast delivery CNC machining services . Whether you need low-volume prototype parts or high-volume production, RJC mold is ready to be your manufacturing partner.

A wide range of metal and plastic materials are available to make CNC milling parts easy. Our factories have the scalable capacity and unrivaled capabilities. Get started on your CNC machining project today with a quick quote within 4-24 hours!

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