Custom CNC Machining Services

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.

• 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.

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.

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.