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Machining ServicesTolerancesCase Studies Materials Surface finishes Workshop

CNC Machining service manufacturing capabilities

CNC machine all types of parts, from simple “as machined” workholdings to complex geometries. Our manufacturers operate almost every kind of CNC mill and turning center, with EDM and grinders available on request. We offer tolerances down to ±.020 mm (±.001 in) and lead times from 5 business days.

CNC Machining Tolerances

We are able to offer a precision machining service with a wide array of tolerances.

Feature

Description

Maximum Part Size

Milled parts up to 41" x 21.6" x 20" (1,050 x 550 x 510 mm). Lathe parts up to 24" (600 mm) length and 16" (400 mm) diameter.

Standard Lead Time

5 business days

General Tolerances

By default, according to ISO 2768, the tolerance of metal will be maintained at+/-0.005 inches (+/-0.127 millimeters). The tolerance for plastics and composite materials will be+/-0.010 inches. We will adjust according to your drawings and requirements.

Precision Tolerances

Evefab can manufacture and inspect to tight tolerances, including sub +/- 0.001" tolerances, per your drawing specifications and GD&T callouts.

Minimum Feature Size

0.020 inches (0.50 millimeters). This may vary depending on the geometric shape of the part and the selected material.

Threads and Tapped Holes

Evefab can accommodate any standard thread size. We can also machine custom threads; these will require a manual quote review.

Edge Condition

By default, we will deburr according to the drawing requirements

Surface Finish

The standard smoothness is machining: 120 Ra or higher. When obtaining a quotation, other surface treatments (such as anodizing, sandblasting, etc.) can be specified.

Exhibition of precision CNC machining parts

Exhibition of Precision CNC Machining Parts

We provide a full process solution from CNC prototyping to mass production. We focus on large-scale production and diversified CNC product production solutions to meet the strict requirements of industrial automation, unmanned joints, and robots.

CNC machining materials

We can generate instant machining quotes for 80+ metals and plastics.

  • PEEK
  • POM (Delrin)
  • PMMA (Acrylic)
  • Nylon
  • ABS
  • PPS
  • PAI
  • PC (Polycarbonate)
  • PSU
  • PVC
  • PP (Polypropylene)
  • PEI (Polyetherimide)
  • PE (Polyethylene)
  • PI (Polyimide)
  • FR4
  • PPSU
  • PET
  • PU (Polyurethane)
  • igus

    PEEK

    PEEK, (polyether ether ketone) is a thermoplastic widely used in industries such as aerospace, automotive, and electronics. PEEK has high strength, stiffness, toughness, chemical, biocompatibility, and thermal resistance. Due to its , PEEK is also suitable for use in harsh environments where other materials may fail. Common applications include aircraft structures, electronic components that require high temperature resistance, and medical and dental components (including implantables).

    Mill Lead Time:
    As fast as 3 days
    Colors:
    Opaque beige
    Grades:
    Standard PEEK, 30% Glass Filled
    CNC machining PEEK parts

    POM (Delrin)

    POM (Polyoxymethylene), commonly known as acetal, is a high-performance engineering thermoplastic widely used for precision CNC machined parts. Delrin® is a well-known commercial brand of acetal homopolymer, while POM also includes copolymer grades from other manufacturers. The material combines low friction, good wear resistance, dimensional stability, stiffness, and excellent machinability, making it particularly valuable for gears, bushings, rollers, precision fixtures, guide components, and mechanical parts.

    Mill Lead Time:
    As fast as 3 days
    Colors:
    White, black, brown
    Grades:
    150, AF (13% PTFE Filled), 30% Glass Filled
    CNC machining POM (Delrin) parts

    PMMA (Acrylic)

    For CNC machining, PMMA is especially valuable when a part needs high transparency, good dimensional accuracy, low weight, and a polished or visually clean appearance. However, acrylic is more brittle than materials such as polycarbonate and requires careful tooling and workholding to prevent cracking, chipping and stress-related defects.

    Mill Lead Time:
    As fast as 3 days
    Colors:
    Optically clear, opaque
    CNC machining PMMA (Acrylic) parts

    Nylon

    Nylon is thermoplastic with high strength, wear resistance, excellent sound/vibration dampening, and low friction coefficient. It is commonly used in engineering and manufacturing processes. Common applications include gears, bearings, and bushings. Two of the most notable use cases for Nylon are in medical devices and electronics insulation, notably screws and spacers for panel mounted circuit boards.

    Mill Lead Time:
    As fast as 3 days
    CNC machining Nylon parts

    ABS

    ABS (Acrylonitrile Butadiene Styrene) is an affordable thermoplastic that has become popular for pre-injection molding prototypes. It is a versatile material known for its strength, durability, and resistance to impact and heat. ABS plastic is widely used in the automotive and consumer electronics industries due to its excellent mechanical properties and ease of processing. Additionally, it can be easily modified with other additives to enhance specific properties such as flame retardancy or UV resistance.

    Mill Lead Time:
    As fast as 3 days
    Colors:
    Black, neutral matte finish
    CNC machining ABS parts

    PPS

    PPS is a high-performance engineering thermoplastic known for its exceptional thermal stability, chemical resistance, and mechanical strength. It exhibits excellent resistance to heat, flame, and harsh chemicals, making it ideal for demanding applications in automotive, electrical, and industrial sectors. PPS retains its properties at elevated temperatures and is often used in components like electrical connectors, pump parts, and aerospace fittings where durability and reliability are critical. Custom PPS CNC machining for high-temperature and chemical-resistant plastic parts, including bushings, insulators, seals, and precision components. Get a quote from Evefab.

    Mill Lead Time:
    As fast as 7 days
    Grades:
    Reinforced (Glass-filled, Carbon-filled), Unfilled, Lubricated
    Finishing Options:
    Machining (CNC, Drilling), Laser Marking, Ultrasonic Welding, Plating (for EMI shielding), Painting (for aesthetic applications).
    CNC machining PPS parts

    PAI

    Torlon PAI is tough and abrasive, especially graphite‑filled and glass‑filled grades, placing heavy demands on cutting tools. Heat accumulates easily during cutting due to low thermal conductivity of PAI. Evefab’s machining team uses sharp carbide or PCD tooling, optimized feeds‑speeds and cooling strategy to avoid chipping, thermal softening and residual stress. For heavy‑stock‑removal parts, stress‑relief annealing can be applied to stabilize final dimensions according to project requirements.

    Mill Lead Time:
    As fast as 10 days
    Finishing Options:
    Precision Machining, Grinding, Polishing, Coating (e.g., PTFE for enhanced lubricity), Laser Marking.
    CNC machining PAI parts

    PC (Polycarbonate)

    Clear PC requires careful machining parameters to avoid surface crazing, scratches and internal stress. Evefab’s machining team optimizes feeds, speeds and tool selection to preserve surface quality for transparent viewports, inspection windows and optical‑grade components. We also process opaque, filled and flame‑retardant PC grades per customer specifications.

    Mill Lead Time:
    As fast as 3 days
    Colors:
    Clear, black and glossy
    CNC machining PC (Polycarbonate) parts

    PSU

    Clear PSU requires carefully tuned machining parameters to avoid internal stress, surface crazing and micro‑scratches. Evefab’s machining team optimizes cutting speeds and tool selection to preserve optical clarity for viewports and inspection components. We also process modified and filled PSU grades according to customer drawing specifications.

    Mill Lead Time:
    As fast as 3 days
    Colors:
    Clear, black and glossy
    CNC machining PSU parts

    PVC

    PVC generates fine chips during cutting. Improper parameters may lead to melting, burrs and surface degradation. Evefab’s machining team optimizes feed rate and cutting speed to maintain clean edges and consistent surface finish. Note that flexible soft PVC is not fit for precision CNC machining.

    Mill Lead Time:
    As fast as 5 days
    Processes:
    CNC Mill,CNC Lathe
    Finishing Options:
    Available as-machined
    Tolerance:
    With drawing: as low as +/- 0.005 mm,
    No drawing: ISO 2768 medium
    CNC machining PVC parts

    PP (Polypropylene)

    PP has a relatively low melting point. Heat generated during cutting may cause burrs, smearing or minor deformation. Evefab’s machining team optimizes cutting feeds and speeds to reduce heat build‑up, delivering clean edges and consistent dimensional results. We process homopolymer PP, copolymer PP and glass‑filled PP according to customer drawings and material specifications.

    Mill Lead Time:
    As fast as 3 days
    Colors:
    White (semi-clear or opaque)
    CNC machining PP (Polypropylene) parts

    PEI (Polyetherimide)

    Unfilled PEI Ultem features natural amber transparency, while glass‑filled grades bring enhanced rigidity and heat deflection. Filled PEI is abrasive to cutting tools; Evefab’s machining team selects proper tooling and optimizes cutting parameters to avoid chipping, internal stress and ensure stable dimensional accuracy for complex geometries.

    Mill Lead Time:
    As fast as 5 days
    Grades:
    PEI 1000 (Unfilled), PEI 2300 (30% Glass Fiber Reinforced), PEI 2400 (40% Glass Fiber Reinforced), PEI CF30 (30% Carbon Fiber Reinforced)
    CNC machining PEI (Polyetherimide) parts

    PE (Polyethylene)

    PE has low melting point and is prone to burrs, heat deformation and tool smearing during processing. Evefab’s machining team optimizes cutting speed, feed rate and tool selection to reduce heat buildup, achieving clean edges and stable dimensional performance. We mainly process HDPE stock; LDPE is available for simple non‑precision projects upon request.

    Mill Lead Time:
    As fast as 3 days
    Colors:
    White, black
    CNC machining PE (Polyethylene) parts

    PI (Polyimide)

    PI is difficult‑to‑machine high‑hardness polymer. Filled grades cause rapid tool wear; improper cutting easily brings chipping, edge breakout and micro‑cracks. Liquid coolant is not recommended for PI machining to avoid delamination risk; dry‑air cooling is preferred. At Evefab, our engineering team applies carbide / diamond‑coated cutting tools, optimized light‑cut dry‑machining parameters and strict fixture setup to eliminate chipping and internal micro‑cracks for PI components.

    Mill Lead Time:
    As fast as 7 days
    Grades:
    Kapton HN, Vespel SP-1, Duratron PI, Upilex-S
    CNC machining PI (Polyimide) parts

    FR4

    FR4 is highly abrasive due to glass fiber content. Common machining risks include edge delamination, fiber burrs, resin burning and rapid tool wear. Liquid coolant should be avoided for electrical‑grade components; dry‑air cooling and vacuum dust extraction are required for stable quality。At Evefab, we adopt dedicated carbide / PCD cutting tools, optimized high‑speed dry‑cut parameters and peck‑drilling strategy to suppress delamination, eliminate burrs and prevent epoxy resin over‑heating.

    Mill Lead Time:
    As fast as 3 days
    Grades:
    Standard FR4, High Tg FR4 (170°C+), Halogen-Free FR4, High Frequency FR4
    CNC machining FR4 parts

    PPSU

    PPSU (Polyphenylsulfone, trade name Radel®) is a high‑performance amorphous thermoplastic. It combines outstanding heat resistance, excellent hydrolytic stability, superior impact toughness and biocompatibility. It can sustain repeated steam autoclave sterilization cycles without performance degradation, and shows good resistance to many chemicals and cleaning agents. Widely used for medical instrument components, food‑contact assemblies, aerospace interior parts and high‑temperature fluid‑handling fixtures。

    Mill Lead Time:
    As fast as 5 days
    Grades:
    Standard PPSU, Glass-Filled PPSU (30%), Medical Grade PPSU
    CNC machining PPSU parts

    PET

    At Evefab, our engineering team uses sharp carbide cutters, optimized feed‑speed combination and reasonable clamping strategy to control cutting heat. Stress‑relief annealing post‑processing is available for high‑reliability precision PET‑P components to eliminate hidden residual stress。

    Mill Lead Time:
    As fast as 3 days
    Grades:
    PET-G (Glycol-modified), Crystalline PET, Amorphous PET, Fiber-Reinforced PET
    CNC machining PET parts

    PU (Polyurethane)

    PU elastomers behave differently based on hardness; soft‑grade PU tends to generate burrs and requires sharp cutting tools and optimized feeds‑speeds to achieve clean edges. Evefab’s machining team adjusts processing parameters according to material shore hardness to avoid deformation and guarantee dimensional consistency. Foam PU is generally not suitable for standard CNC precision machining.

    Mill Lead Time:
    As fast as 5 days
    Colors:
    White, Black, Natural, Beige, Cream, Gray, Light Gray, Dark Gray, Ivory, Translucent
    CNC machining PU (Polyurethane) parts

    igus

    Igus iglidur series are tribologically‑optimized engineering plastics pre‑filled with solid lubricants, delivering self‑lubricating, maintenance‑free sliding performance with low friction and excellent wear resistanceigus®. At Evefab, we provide precision CNC milling and turning on genuine igus iglidur bar‑stock to produce custom sliding bearings, bushings, wear pads and complex motion components for prototyping and low‑to‑medium‑volume production.

    Mill Lead Time:
    As fast as 10 days
    Series:
    iglidur J ,iglidur W300 ,iglidur X ,iglidur A180 ,iglidur E7
    CNC machining igus parts
  • Aluminum
  • Stainless steel
  • Alloy steel
  • Brass
  • Copper
  • Mild steel
  • Tool steel
  • Titanium

    Aluminum

    Aluminum is a lightweight, highly versatile material widely used across industries. It offers a unique combination of properties, including a high strength-to-weight ratio, excellent corrosion resistance, good malleability, and strong thermal and electrical conductivity. These characteristics make it an ideal choice for applications where weight reduction, durability, and efficient heat transfer are critical—such as engine blocks, heat exchangers, and other transportation components.

    Mill Lead Time:
    As fast as 3 days
    Alloys:
    6061-T6, 7075-T6, 7050, 2024, 5052, 6063, MIC6
    Finishing Options:
    Alodine, Anodizing Types II, III, III + PTFE, ENP, Media Blasting, Nickel Plating, Powder Coating, Tumble Polishing.
    CNC machining Aluminum parts

    Stainless steel

    Stainless Steel is a popular and highly versatile material known for its exceptional strength, and durability, along with high temperature, and corrosion resistance. It is widely used in industries such as construction, automotive, aerospace, and manufacturing, with applications ranging from heat exchangers, industrial ovens, exhaust systems, construction equipment, heavy machinery, engine components, fasteners, turbine blades, tanks, pumps, valves, orthopedic implants, and medical equipment.

    Mill Lead Time:
    As fast as 7 days
    Finishing Options:
    Black Oxide, Electropolishing, ENP, Media Blasting, Nickel Plating, Passivation, Powder Coating, Tumble Polishing, Zinc Plating, Vibratory Tumbling
    Alloys:
    303, 304L, 316L, 410, 416, 440C, 17-4PH, Nitronic 60
    CNC machining Stainless steel parts

    Alloy steel

    Sunnyhowe offers a wide range of steel options to meet the demands of various applications. Alloy and carbon steel are particularly useful for creating fixtures, mounting plates, draft shafts, axles, torsion bars, gears, bolts, studs, shafts, and structural components. High-quality steel materials provide excellent strength and durability, making them ideal for demanding industrial applications.

    Mill Lead Time:
    As fast as 7 days
    Alloys:
    4140, 4130, A514, 4340
    Carbon Steel Types:
    1018 Low Carbon, 1045 Carbon, Galvanized Low-Carbon
    Finishing Options:
    Black Oxide, ENP, Electropolishing, Media Blasting, Nickel Plating, Powder Coating, Tumble Polishing, Zinc Plating, Vibratory Tumbling
    CNC machining Alloy steel parts

    Brass

    360 Brass (free-machining brass) is a versatile material for various industries. Common applications include gears, lock components, pipe fittings, and decorative parts. It has excellent machinability and can be easily fabricated into different shapes and sizes. It boasts high corrosion resistance and good electrical conductivity, making it an ideal choice for electrical components and marine applications.

    Mill Lead Time:
    As fast as 5 days
    Finishing Options:
    Media blasting
    CNC machining Brass parts

    Copper

    Copper 101 and 110 have unmatched thermal and electrical conductivity, which makes them a popular choice for bus bars, wire connectors, and other electrical applications like parts for power transmission and distribution systems. Copper alloys 101 and 110 also offer incredible durability, corrosion resistance, and ease of fabrication. Commonly used in high-performance electrical components such as transformers, generators, motors, and switchgear.

    Mill Lead Time:
    As fast as 3 days
    Alloys:
    101, 110
    Finishing Options:
    Available as-machined, media blasted, or hand-polished
    CNC machining Copper parts

    Mild steel

    Mild steel, also known as low-carbon steel, is a durable and versatile material commonly used across various industries. It is characterized by its high strength, ductility, and weldability, making it suitable for a wide range of structural and mechanical applications. Mild steel's affordability and ease of fabrication make it a popular choice for projects requiring robust performance without excessive weight, such as construction frameworks, automotive chassis, and machinery components.

    Mill Lead Time:
    As fast as 5 days
    Grades:
    A36, 1018, 1020, 1045, 12L14, 1215
    Finishing Options:
    Galvanizing, Powder Coating, Painting, Black Oxide, Zinc Plating, Electroplating, Polishing, Sandblasting.
    CNC machining Mild steel parts

    Tool steel

    A2 Tool Steel has excellent wear resistance and toughness, commonly used to make fixtures, tools, tool holders, gauges, and punches.

    Mill Lead Time:
    As fast as 7 days
    Finishing Options:
    Media Blasting, Vibratory Tumbling, Black Oxide, Powdercoating
    CNC machining Tool steel parts

    Titanium

    Titanium is lightweight, strong, biocompatible, and highly resistant to corrosion. It has a high strength-to-weight ratio and excellent temperature resistance. It is commonly used in industries such as aerospace and medical devices. It’s also used for parts like engine components, landing gear, structural elements, medical implants, and prosthetics. Other common use cases include aerospace fasteners, turbine blades, sports equipment, and marine applications.

    Mill Lead Time:
    As fast as 7 days
    Grade:
    Titanium Grade 5
    Finishing options:
    Media Blasting, Vibratory Tumbling, Passivation, Powdercoating
    CNC machining Titanium parts
*For materials not shown here, please contact us directly.

CNC machining surface finishes

We can instantly quote a wide variety of post-machining surface finishes.

Name

Applicable Materials

Colors

Can be applied to

Silver Plating surface finish for CNC machined parts

Silver Plating

Copper, Brass, Bronze, Carbon Steel, Stainless Steel; Aluminum needs nickel undercoat prior to silver plating

Bright silver, Matte silver, Satin silver

Media Blasting, Tumbling, Anti‑tarnish Passivation Sealant

Nitriding surface treatment for CNC machined steel parts, thermochemical diffusion hardening for gears and molds

nitriding

Alloy steel, Nitriding steel, Tool steel(H13,D2), Stainless steel

Full Coating or RAL color catalog

Please contact us for detailed instructions

Close‑up of gold plated CNC machined component, electroplated gold surface treatment for electrical contacts and RF connectors

Gold Plating

Copper, Brass, Steel, Nickel‑plated substrates; Aluminum requires nickel/copper undercoat before gold plating

gold

Media Blasting, Tumbling, Anti‑tarnish sealant

Anodized aluminum surface treatment parts

Anodizing

Aluminum

Clear, black, grey, red, blue,green,orange,gold

Media Blasting, Tumbling, Alodine*

CNC machined part as machined

As machined

Aluminum, Steel, Stainless Steel

Ra 0.8μm - Ra 3.2μm

All post processes

Passivation surface finish for CNC machined stainless steel parts, chemical passivation for corrosion resistance improvement

Passivation

Steel,Stainless steel (303,304,316,410,420); Aluminum, Copper

n/a

Black Oxide, Electroless Nickel Plating, Zinc Plating, Tumbling, Media Blasting

Bead Blasted and Anodized type II Finish Sample

Bead Blasted + Anodized type II

Aluminum

Clear, Black, Red, Blue, Orange, Gold

Media Blasting, Tumbling, Type II Anodizing* Type III Anodizing with PTFE*

Tumbling surface finishing for CNC machined metal parts, mass barrel tumbling for deburring and smooth matte metal texture

Tumbling

Aluminum, Steel, Stainless Steel, Brass, Bronze, Copper

n/a

All post processes, except Electropolish and Powder Coat

Brushed surface finish for CNC machined metal parts, linear grain brushing texture for aluminum, stainless steel components

Brushed

Aluminum, Steel, Stainless Steel, Brass, Bronze, Copper

Small:Draw 6.5-8mm wire to 2.0-4.0mm. Medium:Draw 16-18mm wire to 8.0-12.0mm. Large:Draw 100-120mm wire to 20-30mm.

All post processes, except Electropolish and Powder Coat

Zinc Plating Finish Sample

Zinc Plating

Steel, Stainless Steel

Clear (light blue coating). Black (glossy black coating).

Media Blasting, Tumbling, Passivation

Black Oxide Finish Sample

Black Oxide

Aluminum

Black

Bead blasted, Tumbling, Chem film*

Electropolishing

Electropolishing

Steel, Stainless Steel

n/a

Passivation, Tumbling

*Additional finishing options include chromic acid anodizing, cadmium plating, copper plating, titanium anodizing (blue anodizing), gold plating, silver plating, and more. For materials not listed here, please contact us directly.

Advanced CNC machining workshop equipment&complete CNC manufacturing supply chain

We have advanced CNC machining equipment and excellent supplier partners to handle your precision CNC machining projects. This ability enables us to support everything from rapid prototyping to mass production with consistent quality.

CNC machining resources

Certification system
iso13485 iso9001
We’re trusted by
apple dji xiaomi byd royole

Why Choose

Evefab is a professional CNC machining service provider and excellent supply chain network located in Shenzhen, China, providing customized precision components for global industrial customers.

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FAQs about CNC machining service

  • What is CNC machining?

    CNC machining is a subtractive manufacturing process that uses computer‑controlled machine tools (mills, lathes) to cut solid material blocks into custom‑designed precise parts, from prototypes to mass‑production batches.
    CNC machining includes CNC milling and CNC turning
  • What is your typical tolerance for machined parts?

    Our standard machining tolerance is ±0.005mm (±0.0002"). Tighter tolerances are achievable based on part geometry and material. We will perform a DFM analysis and recommend the optimal process to meet your specifications.
  • Do you provide CNC prototyping services?

    Yes, rapid prototyping is one of our core services. We can quickly produce functional prototypes from your CAD files in a wide range of materials, allowing for design validation before moving into production.
  • What materials can you machine?

    We machine a vast range of materials, including Aluminum (6061, 7075), Stainless Steel (303, 304, 316), Brass, Copper, Titanium, and various Engineering Plastics (PEEK, Delrin, Nylon).
  • What information do I need to get a CNC machining quote?

    For the fastest and most accurate quote, please provide: 1) 3D CAD file (STEP or IGES preferred), 2) 2D drawing (PDF or DWG) with critical dimensions/tolerances, 3) Material specification, 4) Quantity, and 5) Any special finishing requirements.
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