On-demand Custom CNC Machining Services
Online CNC machining service for rapid prototypes and production parts in metals or plastics. Get instant quotes today, and order your custom CNC machined parts at a better price.
- Rapid Prototyping
- Flexible Low-Volume Manufacturing
- Precision Parts with Tight Tolerances
- Fast Delivery – As Quick as 5 Days
Custom CNC Machining Services
for Metal and Plastic Parts
3ERP is an ISO 9001:2015 certified manufacturer providing high-quality CNC machining services for custom parts. Our in-house capabilities include 3-, 4-, and 5-axis CNC milling, as well as CNC turning, routing, EDM machining, drilling, and precision grinding. These processes are all capable of achieving tolerances down to ±0.01 mm.
From rapid prototyping to full-scale production, our machine shops can make any custom design. We specialize in rapid machining, prototype CNC machining, and both high- and low-volume manufacturing. Additionally, we provide a wide variety of surface finishes, including anodizing, powder coating, electroplating, and more, to enhance durability and aesthetic appeal for machined parts.
Whether you are a startup, an SME, or an OEM, 3ERP is your trusted partner for outsourcing CNC services. Submit your CAD files and drawings to receive a prompt quote.
Take a Virtual Tour of Our CNC Machining Workshop
Our CNC Machining
Capabilities
CNC Milling Service
3ERP offers custom CNC milling services using 5-axis machines, along with several 3- and 4-axis mills. We deliver precision CNC machining for complex metal and plastic parts with precision tolerances. Our CNC milling capabilities are ideal for:
- Mold and die making
- Prototypes and production parts
- High-performance and engineering-critical applications
CNC Turning Service
Our CNC turning services use high-performance lathes, turning centers, and mill-turn machines to produce precision-machined cylindrical components, such as shafts, bushings, and worm gears. With live tooling, we enable multi-axis machining in a single setup. These services support:
- Rapid prototypes and production volumes
- Tight-tolerance round parts
- Multi-axis turning with milled features
EDM & Wire-Cut Service
Our precision Wire EDM (Electrical Discharge Machining) uses conductive wire—such as copper, graphite, or molybdenum—to cut complex shapes with tight tolerances, sharp corners, and intricate undercuts. This non-contact process is ideal for:
- Mold and die tooling
- High-precision prototypes and production parts
- Hardened steels and exotic alloys
CNC Grinding Service
For ultra-flat surfaces and precise OD/ID tolerances down to ±0.0002″ (±0.005 mm), our CNC grinding capabilities ensure exceptional accuracy and surface finish. This service is ideal for:
- High-precision metal components
- Post-machining surface refinement
- Tight-tolerance OD/ID applications
Swiss Machining Service
Swiss machining efficiently produces complex, slender parts by moving both the tooling and workpiece, minimizing deformation compared to traditional CNC lathes. This process is ideal for:
- High-precision shafts and pins
- Medical, aerospace, and electronics components
- Tight-tolerance small-diameter parts
CNC Routing Service
Our affordable CNC routing capabilities are ideal for cutting prototypes and parts made from soft materials such as EPS foam, EVA, and wood. This service complements standard CNC milling and is perfect for:
- Lightweight structural models and mockups
- Foam and plastic packaging prototypes
- Custom wood or composite components
One-Stop CNC Machining Parts Supplier
CNC machining is an ideal manufacturing process whether you need a few parts or 10000+ units as end-used production parts. Here are the custom CNC services available at 3ERP.
Rapid Prototyping
3ERP delivers quick turn prototype parts in just days to help engineers, designers, and product developers validate designs accurately.
- Instant online quote
- Instant DFM feedback
- Excellent quality
- Short lead time
Low-volume Manufacturing
CNC machining is a cost-efficient way to make certain types of parts in small volume or medium quantity. For example, 100 pieces to 1000 pieces.
- Lower cost
- Production-level quality
- Short lead time
- Test out the market before investment
End-use Production
CNC machines and robots are an excellent combination for manufacturing, whether for small batches or large volumes.
- Experienced engineers for DFM optimization
- A professional PM working in your time zone
- First Article Inspection
- Guaranteed consistent quality
CNC Success Stories & Testimonials
Here are some of the CNC machining projects that we have done for our customers. And the happiness they would like to share when they receive the parts.
Master Cylinder Prototypes for Braking System.
Challenges
Our Solution
Feedback
Car Model
Challenges
Our customer had this model made by 3D printing which is not as good as expected.
Our Solution
Feedback
into production today
CNC Machining Materials
We offer a wide range of engineering-grade plastic and metal materials, including aluminum, brass, steel, stainless steel, ABS plastic, glass, and wood. If your desired material is not listed in our stock, please specify the required features, tolerances, inspection requirements, and quantities so our engineering team can review your request.
Aluminum
Aluminum offers excellent machinability, corrosion resistance, and durability, making it ideal for various applications, such as aerospace, automotive parts, and outdoor components.
Brass
Brass offers excellent machinability, a strong strength-to-weight ratio, corrosion resistance, and high conductivity, making it ideal for industrial applications requiring durability and precision.
Copper
Copper is an efficient heat conductor with superior malleability, good corrosion resistance, and antimicrobial properties. It is ideal for electrical wiring, plumbing, and heat exchangers.
Steel
Steel is a strong, versatile material with high tensile strength, ideal for structural components. It has various subtypes for specific applications.
Stainless Steel
Stainless steel is a corrosion-resistant alloy of steel, chromium, and nickel. It’s ideal for kitchen appliances, medical equipment, and automotive parts.
Stainless steel 15-5 | 1.4545 | X5CrNiCu15-5
Stainless steel 301 | 1.4310 | X10CrNi18-8
Stainless steel 430 | 1.4016 | X6Cr17
Stainless steel 440C | 1.4125 | X105CrMo17
Stainless steel 420 | 1.4028 | X30Cr13
Stainless steel 304/304L | 1.4301/1.4307 | X5CrNi18-10/X2CrNi18-9
Stainless steel 2205 Duplex | 1.4462 | 2205 | X2CrNiMoN 22-5-3
Stainless Steel 17-4 PH | 1.4542 | X5CrNiCuNb16-4 - Annealed state
Stainless steel 303 | 1.4305 | X8CrNiS18-9
Stainless steel 316/316L | 1.4401/1.4404 | X5CrNiMo17-12-2/X2CrNiMo17-12-2
Bronze
Bronze, an alloy of copper and tin, offers excellent durability and corrosion resistance, making it ideal for intricate, heavy-duty components and applications requiring strength.
Titanium
Titanium offers a high strength-to-weight ratio, low thermal expansion, excellent corrosion resistance, and is biocompatible, making it ideal for aerospace, medical implants, and precision machining.
Titanium Grade 2 | 3.7035
Titanium Grade 1 | 3.7025
Magnesium
Magnesium is the lightest structural metal with a high strength-to-weight ratio, good machinability, and excellent vibration damping, ideal for lightweight applications.
Zinc
Zinc is a corrosion-resistant metal often used for galvanizing steel, die casting, and making batteries, automotive parts, and hardware due to its durability and low cost.
Inconel
Inconel is a high-performance nickel-chromium alloy with excellent heat and corrosion resistance, commonly used in aerospace, gas turbines, and chemical processing equipment.
Invar
Invar is a nickel-iron alloy with extremely low thermal expansion, ideal for precision instruments, clocks, aerospace components, and applications requiring dimensional stability under temperature changes.
ABS
ABS (Acrylonitrile Butadiene Styrene) is a versatile thermoplastic polymer known for its strength, durability, and ease of processing. It is widely used in applications such as automotive parts, consumer electronics, and medical equipment.
PMMA (Acrylic)
PMMA, also known as acrylic, is a transparent, lightweight plastic with excellent optical clarity, commonly used in lenses, displays, light covers, and signage.
PC
PC (Polycarbonate) is a strong, impact-resistant plastic with high transparency and heat resistance, widely used in eyewear lenses, electronics, automotive parts, and safety equipment.
POM/Delrin
POM (Polyoxymethylene), also known as acetal or Delrin, is a strong, low-friction plastic ideal for gears, bearings, automotive parts, and precision mechanical components.
PC GF30
PCGF30 is polycarbonate reinforced with 30% glass fiber, offering high strength, rigidity, and heat resistance—ideal for automotive, electrical housings, and structural components.
PA(Nylon)
PA (Polyamide or Nylon) is a strong, wear-resistant plastic with good chemical resistance, commonly used in gears, bearings, automotive parts, and industrial machinery components.
PC+ABS
PC+ABS is a thermoplastic blend combining strength, impact resistance, and heat resistance, commonly used in automotive interiors, electronic housings, and consumer products.
PA GF30
A glass-fiber reinforced plastic with high strength, excellent dimensional stability and heat resistance, perfect for demanding machining applications.
PP GF30
PP GF30 is polypropylene reinforced with 30% glass fiber, providing excellent heat resistance, low friction, and chemical resistance, commonly used in automotive, industrial, and electrical components.
PP
PP (Polypropylene) is a versatile, lightweight, chemical-resistant plastic commonly used in packaging, automotive parts, textiles, and consumer goods due to its durability and flexibility.
PTFE (Teflon)
PTFE (Polytetrafluoroethylene) is a non-stick, high-temperature resistant plastic known for its excellent chemical resistance. It is commonly used in gaskets, seals, bearings, and non-stick cookware.
PEI
PEI (Polyetherimide) is a high-performance plastic known for its strength, heat resistance, and electrical properties, commonly used in aerospace, automotive, and medical devices.
PS
PS (Polystyrene) is a rigid, lightweight plastic with good clarity, commonly used in disposable cutlery, food containers, CD cases, and packaging materials.
PPS
PPS (Polyphenylene Sulfide) is a high-performance, heat- and chemical-resistant plastic, ideal for industrial components requiring dimensional stability and durability.
PE
PE (Polyethylene) is a lightweight, flexible, and chemical-resistant plastic widely used in household goods for its durability and versatility.
PPSU
PPSU (Polyphenylsulfone) is a tough, heat- and chemical-resistant plastic, ideal for medical devices, sterilizable components, plumbing fittings, and aerospace parts requiring high performance.
PET
PET (Polyethylene Terephthalate) is a strong, lightweight plastic commonly used in food containers, textiles, and packaging for its durability and recyclability.
PEEK
PEEK (Polyetheretherketone) is a high-performance, heat-resistant plastic with excellent chemical resistance, commonly used in aerospace, medical, and automotive parts.
LDPE
LDPE (Low-Density Polyethylene) is a flexible, lightweight plastic with good chemical resistance, commonly used in containers, toys, and piping applications.
G-10/FR4
G-10/FR4 is a fiberglass-reinforced epoxy laminate, offering excellent electrical insulation and strength, commonly used in circuit boards, electrical components, and structural applications.
HDPE
HDPE (High-Density Polyethylene) is a strong, durable plastic with excellent chemical resistance, commonly used in containers, pipes, toys, and industrial applications for its toughness.
PVC
PVC (Polyvinyl Chloride) is a durable, chemical-resistant plastic used in pipes, flooring, medical devices, and electrical insulation due to its versatility and low cost.
Foam Plastics
Foam plastics, such as polyurethane (PU) and polystyrene (PS), are lightweight, easily machinable materials commonly used for prototyping, modeling, and low-load tooling. Their foam structure offers excellent dimensional stability and ease of cutting, making them ideal for visual models and master patterns in mold making.
Wood
Wood is a natural material from trees. High-density woods are machinable. It’s a common material for consumer products such as furniture and artwork.
Glass
Glass is a hard, transparent material made from silica, used in windows, containers, lenses, and decorative items due to its clarity, strength, and versatility.
Stone
Stone is a durable, natural material used in construction, landscaping, artworks (e.g., statues, jewelry), and inspection machines, valued for its strength, beauty, and versatility.
Ceramics
Ceramics is a super-rigid, insulating high high-temperature resistant material. It is widely used in electronic products. It can be used as a cutter as well.
CNC Machining Finishes
Surface finishes are essential for enhancing the appearance, durability, and functionality of precision-machined parts. As the final step in the CNC process, surface finishing improves wear resistance, corrosion protection, sealing, and friction performance through mechanical, chemical, or thermal treatments. Explore our list of popular CNC surface finish options to meet your specific functional and aesthetic requirements.
This finish leaves the surface directly from the CNC machine, providing a cost-effective option with visible tool marks.
This process smooths the surface by removing tool marks, resulting in a refined finish with varying levels of gloss and texture.
This process creates a uniform, matte texture by propelling fine abrasive particles onto the surface, removing imperfections and tool marks.
A protective and aesthetic coating is applied to the surface, offering a smooth, uniform finish with customizable colors and textures.
A durable, wear-resistant finish applied electrostatically and cured under heat, providing a uniform, protective coating in various colors.
An electrochemical process that enhances surface durability, corrosion resistance, and appearance, available in various colors with a smooth or matte finish.
An electrostatically applied coating that provides a uniform, corrosion-resistant finish with excellent adhesion, commonly used for protective and aesthetic purposes.
A protective and decorative coating that enhances corrosion resistance, wear resistance, and surface hardness while providing a smooth, metallic finish.
CNC Machining Tolerances and Standards
Process
Tolerance (Inches)
Tolerance(Millimeters)
CNC Machining Design Guidelines
Read our practical guide to optimize production efficiency. 3ERP experts offer immediate feedback to ensure optimal results in CNC machining, helping you consistently achieve precision tolerances. Following these best practices not only enhances precision and shortens lead time but also helps control your CNC machining service cost by reducing unnecessary complexity and rework.
CNC Machining for Various Industrial Applications
Automotive
Large size parts such as CNC machined ABS bumpers, PC/ABS dashboards and precise automotive components like reflectors, lenses, steering wheel components, engine, transmission.
Robotics and Automations
Manipulator parts, actuators, end effectors, motors, automatic control equipment, clamps, and housings for the robotics & automation industry.
Medical
Components for medical needs such as stainless steel or titanium bone plate, prostheses, respiratory devices, handheld devices, diagnosis equipment, anatomical models, and surgical instruments.
Aerospace
Aerospace engines, fuselages, turbines, brakes, tire parts, lighting system, vacuum pumps, and fuel pumps parts.
Consumer Products
Consumer products such as electronics device housings, buttons, handles, knobs, switches, wearable digital devices, cookware products, sporting equipment.
Energy
Energy industry components such as heat exchangers, valves, pipes, pumps & accessories, hydraulic components, battery components, solar panel parts, frames, and impellers.
Industrial Machinery
Electronic housings, conveyors, fasteners, connectors, generator components, fixtures, machine and tool parts for industrial machinery.
Education
Actual models can be created for education needs, experimental equipment such as engineering models，3ERP work with worldwide universities.
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