CNC Machining Service
Custom Precision Part CNC Machining Services
Get instant quotes on custom metal and plastic machined parts with our Online CNC Machining Service. Make quick turn prototypes and production parts in days. ISO 9001:2015, ISO 13485 and AS9100D certified. Our highly qualified machine shops can make any custom design, simple or complex. We offer rapid prototyping, small-batch machining, and high-volume production.
What is CNC Machining Service?
CNC, or computer numerical control machining, is a widely used manufacturing process that uses automated, high-speed cutting tools to form designs from metal or plastic stock. Standard CNC machines include 3-axis, 4-axis, and 5-axis milling machines, lathes, and routers. Machines may vary in how CNC parts are cut—the workpiece may remain in place while the tool moves, the tool may remain in place while the workpiece is rotated and moved, or both the cutting tool and workpiece may move together.
Skilled machinists operate a CNC machine by programming tool paths based on the geometry of the final machined parts. The part geometry information is provided by a CAD (computer-aided design) model. CNC machines can cut almost any metal alloy and rigid plastic with high precision and repeatability, making custom machined parts suitable for nearly every industry, including aerospace, medical, robotics, electronics, and industrial. We provides CNC services and offers custom CNC quotes on over 40 materials ranging from commodity aluminum and acetal to advanced titanium and engineered plastics like PEEK and Teflon.
Metal CNC Machining Materials
Aluminum 6061
Aluminum 5052
Aluminum 2024
Aluminum 6063
Aluminum 7050
Aluminum 7075
Aluminum MIC-6
Copper 101
Copper C110
Copper C932
Copper 260
Copper 360
Nitronic 60 (218 SS)
Stainless Steel 15-5
Stainless Steel 17-4
Stainless Steel 18-8
Stainless Steel 303
Stainless Steel 316/316L
Stainless Steel 416
Stainless Steel 410
Stainless Steel 420
Stainless Steel 440C
Steel 1018
Steel 1215
Steel 4130
Steel 4140
Steel 4140PH
Steel 4340
Steel A36
Titanium (Grade 2)
Titanium (Grade 5)
Zinc Alloy
Plastic CNC Machining Materials
High-strength engineering plastic used for many commercial products.
A clear glass-like plastic. Good wear and tear properties. Great for outdoor use.
Resin with good moisture resistance, high wear-resistance, and low friction.
Constructed of an epoxy resin with fiberglass fabric reinforcement, and also called epoxy-grade industrial laminate and phenolic, this material offers high strength and low moisture absorption.
High-density polyethylene is a moisture and chemical-resistant plastic with good impact strength. The material is outstanding for outdoor applications as well as watertight containers or seals.
Offers increased mechanical strength, rigidity, good stability under heat and/or chemical resistance.
With almost twice the tensile strength of ABS, polycarbonate has superior mechanical and structural properties. Used widely in automotive, aerospace, and other applications that require durability and stability.
Offering excellent tensile strength, PEEK is often used as a lightweight substitute for metal parts in high-temperature, high-stress applications. PEEK resists chemicals, wear, and moisture.
Has excellent electrical properties and little or no moisture absorption. It carries light loads for a long period in widely varying temperatures. It can be machined into parts requiring chemical or corrosion resistance.
This material surpasses most plastics when it comes to chemical resistance and performance in extreme temperatures. It resists most solvents and is an excellent electrical insulator.
Ultra-high molecular weight polyethylene. A general-purpose material. It offers a unique combination of wear and corrosion resistance, low surface friction, high impact strength, high chemical resistance, and does not absorb moisture.
Polyvinyl chloride (Type 1) is a highly chemical-resistant synthetic plastic, PVC is commonly in environments exposed to liquids or requires electrical insulation.
CNC Machining Surface Finishes
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.
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.
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.”
Provides uniform zinc coating which offers protection from corrosion, oxidation, and wear on irregular surfaces. Conforms to ASTM B633-15.
FAQs List of CNC Machining Services
- +.005”/-.005” local tolerances across most geometries in metals, +/- 0.010" for plastics. Will vary for large parts, specifically when holding flatness over large parts after heat treatment.
- Finish requirements for “As Milled” finish will have a minimum 125 surface finish for CNC parts.
- All fabricated parts have a 0.010” dimensional and 1° angular tolerance.
- Tapped holes not explicitly called out as Features on the quoted CAD model may be machined to the diameters specified in that model.
- No surface treatments (e.g. anodize, bead blast, iridite, powder coat, etc.) will be applied unless you have paid for them and we have specifically acknowledged them.
CNC machining uses subtractive processes, which means feedstock is machined to its final form by subtracting and removing material. Holes are drilled, lots and pathways are bored, and metal stock is shaped into new material with varying tapers, diameters, and shapes.
For subtractive manufacturing, shapes are achieved by the subtraction of material. This contrasts with other types such as additive manufacturing — where materials are added, layered, and deformed to a specified shape. It also contrasts with injection molding where the material is injected in a different state of matter, using a mold, and formed to a specified shape.
CNC machining is versatile — and can be used with various materials, including metals, plastics, wood, glass, foam, and other composite materials. This versatility has helped make CNC machining a popular choice across industries, enabling designers and engineers to fabricate products efficiently and precisely.
- 5 Axis Machining up to 26″
- 4 Axis Machining up to 36″
- 3 Axis Machining up to 60″
- Dual Spindle Lathes with 32″ Swing, 18″ Max Diameter, and 8″ Chuck
- Wire EDM with a part depth of 18″
CNC machining is a manufacturing process that uses computer-controlled machines to produce precise and complex parts from various materials.
Common materials include metals (such as aluminum, steel, and brass), plastics, and wood.
Common types include CNC mills, lathes, and routers.
CAD software is used to create a 3D model
CNC machined parts are used in a wide range of industries such as aerospace, automotive, and medical.
CNC milling involves cutting away material to create a 3D shape, while CNC turning involves rotating the material to create cylindrical shapes.
Part CNC Machining Frequently Asked Questions
CNC programming involves writing code that tells the machine how to move and cut the material to create the desired part.
Quality control measures ensure that CNC machined parts meet the required specifications for dimensional accuracy, surface finish, and strength.
Common types include drills, end mills, and taps.
Fixturing refers to the process of holding the material being machined in place to ensure accuracy and consistency.
Manufacturers can use quality control measures such as testing and inspection to ensure that their parts meet the required specifications.
Common finishing processes include polishing, painting, and anodizing.
Cutting speed affects the rate at which material is removed and can impact the quality and accuracy of the finished part.
CNC machining involves removing material to create a part, while 3D printing involves adding material layer by layer to create a part.
Manufacturers can use process optimization techniques such as lean manufacturing and just-in-time inventory management to reduce costs and improve efficiency.
CNC Machining Advantages
CNC milling and CNC turning are highly accurate and repeatable processes. Tight tolerances between +/-0.001″ – 0.005″ can be achieved, depending on specifications. Machines can be programmed to reliably run for 24 hours, 7 days a week if necessary, so CNC milling is a good way of getting parts produced on demand.
Using standard tooling, a CNC machining service is particularly valuable for creating one-off parts, custom CNC parts, i.e., for replacing legacy components or delivering a specialized upgrade to a customer. It is also conceivable to scale single-part production to runs exceeding 10,000 units. Depending on the unit number, size, and complexity, the turnaround for CNC machined parts can be as short as one day. With shipping and delivery, deadlines can be met within a week.
Another primary advantage of CNC technology is its achievable mechanical properties. By cutting away from bulk material, rather than thermally transforming it as in injection-molding or additive manufacturing, all desirable mechanical properties of the metal or plastic of choice are retained. More than 50 industrial-grade metals, alloys, and plastics can be machined using CNC milling and turning. This selection includes aluminum, brass, bronze, titanium, stainless steel, PEEK, ABS, and zinc. The only material requirement for CNC machining is that the part has an adequate hardness to be fixtured and cut.
