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Custom CNC Machining Parts
Our sophisticated CNC machining service can produce a broad variety of customized CNC machining parts, from straightforward workholdings to complex shapes. In addition to being competent with a range of CNC mills and turning centers, our skilled workforce can also provide EDM and grinding services upon request. Because of our precise engineering, we can achieve tolerances as low as +/- 0.0001″, ensuring the highest level of accuracy. In addition, with our efficient production process, we may complete your orders in as little as 7 working days.
See more show case about our CNC Machining Parts…
CNC Machining Service Process
CNC machining service is a precise process that shapes parts by removing material rather than adding it. It starts with a CAD file, which guides CNC tools to cut the design directly out of a solid block of metal or other material. As the CNC machining service, it removes layer after layer until the final part shape appears.
For larger or more complex parts, we often machine them in separate sections, then bond those sections together. This method creates a highly accurate part with a smoother, higher-quality surface. The finished part is then ready for further steps like plating, painting, or polishing, depending on your project’s needs.
Accelerate precision and timelines for tooling, progressive dies, and assembly fixtures made faster and more precisely, even in larger quantities.
Make more complex parts using materials like aluminum, stainless steel, titanium, Invar, Kovar, brass, and plastics.
Turn designs into finished parts faster, including prototypes with complex shapes, using CNC prototyping.
Create metal and non-metal surfaces that hold coatings and paint finishes better, for a cleaner final look.
Hold tight tolerances on every part, so pieces fit and work correctly the first time.
Reduce lead times by combining machining, finishing, and quality checks into one smooth process.
Scale easily from a single prototype to full production runs without losing accuracy or quality.
MXY CNC Machining Overview
MXY delivers precision CNC machining services for businesses that need precise, high-quality parts of modern manufacturing. With advanced 3-axis, 4-axis, and 5-axis CNC milling and turning centers, we process a wide range of materials including aluminum, stainless steel, titanium, brass, copper, and engineering plastics to tolerances as tight as ±0.001mm. Our capabilities span prototyping through full-scale production, supporting industries such as aerospace, automotive, medical devices, electronics, and industrial equipment. Backed by a rigorous quality management system, in-house CMM inspection, and a skilled engineering team, MXY ensures every component meets exact specifications before it ships, so you can count on consistent results and on-time delivery every time.
CNC Turning
Experience high precision and efficiency with MXY Machining’s CNC Turning Services, expertly producing cylindrical components with unmatched accuracy and speed.
CNC Milling
MXY Machining’s CNC Milling Services deliver precise cutting and shaping of materials into complex parts with exceptional accuracy and surface finish.
CNC Routing
MXY Machining’s CNC Routing services deliver precise shaping and cutting of various materials and customizable designs with high repeatability and efficiency.
Standards Tolerances for custom CNC Machining
Description |
Standard Tolerance |
|---|---|
| Maximum Size Limit | We have the capability to produce and examine with precise tolerances, which includes tolerances as tight as sub +/- 0.001″ as per the specifications. |
| Accurate tolerances | Dimensions (Length, width, height) diameter and placement (position, concentricity, symmetry) within +/- 0.005 inches. |
| Distance Measurements | The thickness is 0.020 inches (0.50 mm), which could differ based on the geometry of the part and the material selected. |
| Finishes | The default finish is machined to 125 Ra or higher. Different finishing choices are available upon request for a quotation. |
| Minimum Dimension | The thickness is 0.020 inches (0.50 mm), which could differ based on the geometry of the part and the material selected. |
| Threads and Tapped Holes | We have the capability to accommodate all standard thread sizes. Additionally, we are able to create custom threads through machining, although this will necessitate a manual quote review.For sizes up to 12″, the tolerance is +/- 0.005″ and angularity is within 1/2 degree. For sizes 24″ and above contact MXY consult team. |
| Orientation and Shape Measurements | For sizes up to 12″, the tolerance is +/- 0.005″ and angularity is within 1/2 degree. For sizes 24″ and above contact MXY consult team. |
| Critical Condition | Ensure that all sharp edges are automatically smoothed and deburred. Any critical edges that need to remain sharp must be clearly indicated on the print. |
CNC Machining Materials
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Titanium
Exceptional strength-to-weight ratio and corrosion resistance make titanium ideal for aerospace, medical implants, and high-performance components. CNC machined to tight tolerances for demanding applications.
Stainless Steel
Aluminum
Lightweight, highly machinable, and cost-effective aluminum is the go-to choice for enclosures, brackets, heat sinks, automotive parts, and consumer electronics prototypes and production runs.
Brass
Copper
Steel (Carbon Steel)
Ultem (PEI)
Mild Steel
ABS
POM (Delrin)
Nylo
PEEK
PC (Polycarbonate)
Delrin
Polycarbonate
PTFE (Teflon)
Surface Finishes for CNC Machining
A practical reference covering every standard CNC machining surface finish, applicable across aluminum, steel, stainless steel, brass, copper, and engineering plastics. Includes Ra values, material compatibility, cost, and selection guidance.
Property |
Details |
|---|---|
| Ra range | 1.6 – 6.3 µm (63 – 250 µin) |
| Process | Direct off the CNC mill/tune no secondary operation |
| Appearance | Visible tool marks, machining lines, slight oil residue |
| Materials | All machinable materials |
| Best for | Functional internal parts, brackets, hidden components, prototypes, parts going into further finishing. |
Property |
Detail |
|---|---|
| Ra range | 0.4 – 1.6 µm (16 – 63 µin) |
| Process | Additional finish pass with high spindle speed, low feed rate, sharp tool, small stepover |
| Appearance | Smooth edges, rounded corners, reduced tool marks but still visible |
| Materials | All metals. Plastics can achieve even finer |
| Best for | Cosmetic parts that don't need coating, sealing surfaces, parts where tool marks would be unacceptable. |
Property |
Detail |
|---|---|
| Ra range | 0.8 – 3.2 µm (32 – 125 µin) standard; 0.2 – 0.8 µm (8 – 32 µin) fine |
| Process | CNC lathe turning; concentric feed lines around the circumference |
| Appearance | CNC lathe turning: concentric feed lines around the circumference |
| Materials | All round-bar materials |
| Best for | Shafts, pins, bushings, cylindrical components, sealing surfaces. |
Property |
Details |
|---|---|
| Ra range | 0.8 – 3.2 µm (32 – 125 µin), depends on media size |
| Process | High-pressure blasting with glass beads, aluminum oxide, or plastic media |
| Appearance | Uniform matte/satin, no tool marks, consistent non-reflective surface |
| Materials | Aluminum, stainless steel, brass, titanium; softer plastics can be blasted with plastic media |
| Best for | Consumer electronics housings, automotive trim, panels, pre-treatment before anodizing/coating, parts needing uniform non-reflective appearance. |
Property |
Detail |
|---|---|
| Ra range | 0.4 – 1.6 µm (16 – 63 µin) |
| Process | Abrasive belt or wheel in a single direction typically 180–400 grit |
| Appearance | Directional grain lines, satin metallic look, consistent sheen |
| Materials | Aluminum, stainless steel, brass, copper; not for plastics |
| Best for | Architectural trim, consumer products, panels, aesthetic parts where a metallic directional grain is desired. Often followed by clear coat or anodizing to preserve. |
Property |
Detail |
|---|---|
| Ra range | 0.8 – 3.2 µm (32 – 125 µin), depends on media size |
| Process | High-pressure blasting with glass beads, aluminum oxide, or plastic media |
| Appearance | Uniform matte/satin, no tool marks, consistent non-reflective surface |
| Materials | Aluminum, stainless steel, brass, titanium; softer plastics can be blasted with plastic media |
| Best for | Consumer electronics housings, automotive trim, panels, pre-treatment before anodizing/coating, parts needing uniform non-reflective appearance. |
Property |
Detail |
|---|---|
| Ra range | 0.025 – 0.4 µm (1 – 16 µin), mirror: < 0.05 µm (< 2 µin) |
| Process | Multi-stage sanding (400 → 600 → 1200 → 2000+ grit) followed by buffing with rouge/compound |
| Appearance | Mirror or near-mirror reflective surface |
| Materials | Aluminum, stainless steel, brass, copper, acrylic/PC plastics, not for porous castings |
| Best for | Reflectors, cosmetic trim, luxury goods, optical components, food-grade surfaces, show pieces. Almost always followed by protective coating. |
Property |
Detail |
|---|---|
| Ra range | Grinding: 0.1 – 0.8 µm (4 – 32 µin), Lapping: 0.01 – 0.2 µm (0.4 – 8 µin) |
| Process | Surface grinding (abrasive wheel) or lapping (abrasive slurry on flat plate) |
| Appearance | Extremely flat, smooth, uniform; no tool marks |
| Materials | Hardened steel, stainless steel, carbide, ceramics; not for soft metals or plastics |
| Best for | Precision sealing surfaces, gauge blocks, bearing surfaces, mold/die components, parts requiring extreme flatness and low Ra. |
Type |
Thickness |
Hardness |
Color |
Best For |
|---|---|---|---|---|
| Type II (Standard) | 5–25 µm | 300–400 HV | Any dyeable color | General cosmetic + corrosion |
| Type III (Hardcoat) | 25–75 µm | 500–700 HV | Dark gray/black | Industrial wear + corrosion |
| Type I (Chromic) | 2–7 µm | Low | Clear/gray | Aerospace, fatigue-critical |
Property |
Detail |
|---|---|
| Ra range | No change. Preserves underlying machined finish |
| Process | Immersion in nitric acid or citric acid removes free iron and contaminants from surface, restores chromium oxide layer. |
| Appearance | No visible change. Part looks identical to before. |
| Materials | Stainless steel (303, 304, 316, etc.) not for other metals |
| Best for | All stainless steel parts, especially food/medical/industrial applications where corrosion resistance is critical. Standard post-processing for stainless CNC parts. |
Property |
Detail |
|---|---|
| Ra range | Improves by 50–75% (e.g., 1.6 µm → 0.4–0.8 µm) |
| Process | Electrochemical removal of surface material; dissolves peaks and smooths micro-surface |
| Appearance | Bright, smooth, reflective & clean metallic luster. |
| Materials | Stainless steel, aluminum, copper, brass; not for plastics |
| Best for | Medical devices, food processing equipment, pharmaceutical parts, high-purity applications, parts needing improved cleanability and corrosion resistance. |
Property |
Detail |
|---|---|
| Ra range | No change. Preserves underlying finish. |
| Process | Chemical conversion coating (hot alkaline bath for steel, mid-temp for stainless) forms black iron oxide (Fe₃O₄) on surface. |
| Appearance | Uniform matte black. No dimensional change |
| Materials | Carbon steel, alloy steel, stainless steel, copper, not for aluminum |
| Best for | Hand tools, firearms, automotive parts, fasteners, decorative black parts, parts needing mild corrosion protection + black appearance without dimensional change. |
Property |
Detail |
|---|---|
| Ra range | Slight increase (~0.5–1 µm) due to crystal growth |
| Process | Immersion in zinc phosphate or manganese phosphate solution forms crystalline phosphate layer |
| Appearance | Gray/black crystalline matte surface |
| Materials | Carbon steel, alloy steel; not for stainless, aluminum, or plastics |
| Best for | Pre-treatment before painting or powder coating (excellent adhesion base), wear surfaces (manganese phosphate holds oil), fasteners. |
Property |
Details |
|---|---|
| Ra range | 0.4 – 1.6 µm (16 – 63 µin) |
| Process | Electroplated zinc; often followed by chromate or trivalent passivation (clear, yellow, black, olive) |
| Thickness | 5 – 25 µm |
| Appearance | Silvery (clear passivate), yellow/gold (yellow passivate), black (black passivate) |
| Materials | Carbon steel, alloy steel; not for stainless, aluminum, or plastics |
| Best for | Fasteners, brackets, stamped parts, automotive components, any steel part needing cost-effective corrosion protection. |
Property |
Details |
|---|---|
| Ra range | 0.4 – 1.6 µm (16 – 63 µin) |
| Process | Electroplated zinc often followed by chromate or trivalent passivation (clear, yellow, black, olive) |
| Thickness | 5 – 25 µm |
| Appearance | Silvery (clear passivate), yellow/gold (yellow passivate), black (black passivate) |
| Materials | Carbon steel, alloy steel; not for stainless, aluminum, or plastics |
| Best for | Fasteners, brackets, stamped parts, automotive components, any steel part needing cost-effective corrosion protection. |
Property |
Details |
|---|---|
| Ra range | 0.1 – 0.8 µm (4 – 32 µin) hard chrome can be rougher |
| Process | Electroplated chromium; decorative chrome (thin, over nickel) or hard chrome (thick, engineering) |
| Thickness | Decorative: 0.25 – 1 µm. Hard chrome: 5 – 500 µm |
| Appearance | Bright, mirror-like, bluish-silver metallic |
| Materials | Steel, stainless steel, copper, brass, aluminum (needs strike) plastics for decorative only (ABS/PC-ABS) |
| Best for | Decorative trim (automotive, bathroom fixtures), wear surfaces (hydraulic rods, molds, engine components), corrosion protection. |
Property |
Details |
|---|---|
| Ra range | 0.4 – 1.6 µm (16 – 63 µin) |
| Process | Electroplated or immersion tin |
| Thickness | 2 – 15 µm |
| Appearance | Silvery matte to bright metallic |
| Materials | Copper, brass, steel, aluminum. Not for plastics |
| Best for | Electrical connectors, contacts, terminals, solderable surfaces, food contact (tin is non-toxic), parts needing corrosion protection + conductivity + solderability. |
Property |
Details |
|---|---|
| Ra range | 0.1 – 0.4 µm (4 – 16 µin) |
| Process | Electroplated gold over nickel strike |
| Thickness | 0.05 – 5 µm (typically 0.5–2 µm for connectors) |
| Appearance | Bright, rich yellow-gold metallic |
| Materials | Copper, brass, nickel, steel (needs strike) not for aluminum directly |
| Best for | Electrical connectors, contacts, PCB pads, jewelry, luxury goods, high-reliability electronics, corrosion-critical applications. |
Property |
Details |
|---|---|
| Ra range | 0.2 – 0.8 µm (8 – 32 µin) |
| Process | Electroplated copper often used as a strike or undercoat |
| Thickness | 5 – 50 µm |
| Appearance | Bright pinkish-orange metallic, tarnishes to brown/green over time |
| Materials | Steel, zinc, aluminum (needs strike), plastic (metallized) |
| Best for | Undercoat for other platings (improves adhesion and leveling), EMI/RFI shielding, electrical conductivity, decorative applications (with clear coat). |
Property |
Details |
|---|---|
| Ra range | Depends on pre-treatment. Coating fills minor imperfections (~0.8–3.2 µm final) |
| Process | Electrostatic spray of dry powder + oven curing (~180–200°C); 50–120 µm coating |
| Appearance | Smooth, matte, satin, gloss, or textured wide color range |
| Materials | Steel, aluminum, stainless steel. Not for plastics (heat distortion) |
| Best for | Fasteners, brackets, stamped parts, automotive components, any steel part needing cost-effective corrosion protection. |
Property |
Details |
|---|---|
| Ra range | Depends on pre-treatment; 0.4–1.6 µm final for smooth paint |
| Process | Spray or dip application of liquid paint (acrylic, polyurethane, epoxy) air-dried or baked; 20–60 µm coating |
| Appearance | Any color, gloss level, or effect (metallic, pearlescent, matte) |
| Materials | All metals (with primer), most plastics (with adhesion promoter) |
| Best for | Cosmetic parts, prototypes, low-volume production, parts needing custom colors or effects, large assemblies that can't fit in powder coat ovens. |
Property |
Details |
|---|---|
| Ra range | Preserves substrate finish; very smooth |
| Process | Immersion in water-based paint bath + electrical current deposits paint uniformly; 10–30 µm coating |
| Appearance | Smooth, uniform, typically black or dark gray; can be topcoated |
| Materials | Steel, aluminum, stainless steel. Conductive materials only |
| Best for | Automotive parts, fasteners, complex geometries, pre-treatment before powder coating (primer), high-volume production, parts needing uniform corrosion protection in crevices. |
Property |
Details |
|---|---|
| Ra range | Slight increase, 1–3 µm coating |
| Process | Spray-applied ceramic-polymer composite coating, cured at low temp (~90–180°C) |
| Appearance | Matte to satin, wide color range. Can do patterns/camo |
| Materials | Steel, aluminum, stainless steel, titanium, polymers, composites |
| Best for | Firearms, tactical gear, automotive parts, tools, parts needing extreme wear + corrosion + heat resistance, custom colors/patterns. |
