custom CNC Machining
with Mastars
CNC that’s 40% faster, with micron precision
CNC Machining Service
Our Rapid Prototyping service provides high-quality prototypes quickly and accurately by leveraging advanced technologies such as 3D printing, CNC machining, and vacuum casting. This approach accelerates product development and design validation, offering key benefits including speed, cost-effectiveness, precision, and flexibility, which facilitate rapid adaptation to design changes and reduce upfront costs.
Committed to quality assurance, customer-centricity, and innovation, we ensure that every prototype meets the highest standards while addressing your unique project requirements. Perfect for product design validation, engineering testing, and market presentations, our service efficiently transforms ideas into reality, allowing you to refine designs, test functionality, and confidently secure customer approval.
Why Choose Mastars for Custom CNC Machining?
Fast and Reliable Delivery
Manufacturing Analysis and Quotes
Infinite Capacity
Material Selection
Advanced Capabilities
CNC Milling
CNC milling is a subtractive manufacturing method that employs 3-axis and 5-axis indexed milling to shape solid plastic and metal blocks into finished parts.
Instand quotes on custom milled metal and plastic parts
Quick-turn prototypes and production parts in days
Free standard shipping on all US orders
International prototype pricing includes tariffs
ISO 9001:2015, ISO 13485, IATF 16949:2016
CNC Turning
CNC turning with live tooling integrates lathe and milling capabilities to machine cylindrical parts from metal rod stock.
Instant quotes on custom metal and plastic turned parts
Quick-turn prototypes and production parts in days
Free standard shipping on all US orders
International prototype pricing includes tariffs
ISO 9001:2015, ISO 13485, IATF 16949:2016
5-Axis CNC Machining
5-axis CNC machining is a high-precision process that uses simultaneous five-axis movement to efficiently machine complex metal and plastic parts with minimal setups.
Get quotes on custom parts with our Online 5-Axis CNC Machining Services
Make quick turn prototypes and production parts in days
100% produced by drawing
ISO 9001:2015, ISO 13485, IATF 16949:2016
Post Machining
Post machining refers to a series of secondary processes applied to CNC-machined parts after primary cutting, including heat treating, polishing, plating and painting, to enhance mechanical properties, surface finish and application suitability.
Multiple Choice
100% produced by drawing
ISO 9001:2015, ISO 13485, IATF 16949:2016
CNC Machining Metal Materials
✔️ Aluminum Alloy：6061, 5052, 2024, 6063, 7050, 7075, MIC-6
✔️ Copper Alloy: 101, C110
✔️ Bronze Alloys & Brass Alloys: Copper C932, Copper 260, Copper 360
✔️ Stainless Steel Alloys: Nitronic 60 (218 SS), Stainless Steel 15-5, 17-4, 18-8,303, 316/316L, 416, 410, 420, 440C
✔️ Steel Alloys: 1018, 1215, 4130, 4140,4140PH, 4340, A2 Tool Steel, O1 Tool Steel
✔️ Titanium Alloys: Titanium (Grade 2), Titanium (Grade 5)
✔️ Zinc Alloys: Zinc Alloy
CNC Machining Plastic Materials
✔️ Delrin (Acetal): Acetal, Delrin 150, Delrin 100
✔️ Garolite: Garolite G10 (FR4), Garolite G10 (non-FR), Garolite G11 (FR5)
✔️ PEEK: PEEK, PEEK (USP Class VI TECAPEEK), PEEK GF30
✔️ ULTEM: ULTEM 1000, ULTEM 2300
✔️ Custom: ABS, Acrylic, HDPE, Nylon 6/6, PC (Polycarbonate), Polypropylene, PTFE (Teflon), UHMW PE, PVC, etc
CNC Machining Tolerances
| Feature | Description | |||
| 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 | Mastars 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” (0.50 mm). This may vary depending on part geometry and chosen material. | |||
| Threads and Tapped Holes | Mastars 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 as-machined: 125 Ra or better. Additional finishing options can be specified when getting a quote. | |||
CNC Machining Applications
Across aerospace, medical, and automotive manufacturing, CNC machining is valued for its ability to rapidly produce high‑precision parts in production‑grade materials, ensuring consistent quality and fast turnaround from prototyping to volume production.
Typical CNC parts, include:
✔️Housings and enclosures
✔️Brackets
✔️Fixtures for manufacturing
✔️Gears and bearings
✔️Internal mechanical components
✔️Medical instrumentation
CNC Machining Finishes
✔️ Basic Surface Finishing
•Standard (As-Milled) •Bead Blast •Tumbled •Electropolishing
✔️ Protective Surface Treatments
•Anodized (Type II Or Type III) •Titanium Anodize •PTFE Impregnated Hard Anodize •Chem Film (Chromate Conversion Coating) •Passivation •Powder Coat •Electroless Nickel Plating •Zinc Plating
✔️ Functional/Decorative Surface Treatments
• Silver Plating •Gold Plating
Advantages and Challenges of CNC Machining
Advantages of CNC Machining
Challenges of CNC Machining
CNC manufacturing’s high performance has two key trade-offs: geometric complexity increases costs, with simple, sturdy parts being optimal for milling and turning; tool access limits designs, though more machine axes enable more complex features. Startup costs are also high due to the need for professional setup, tool loading and programming—but these fixed costs can be reduced via batch production, minimal part repositioning and 5-axis+ machining (which eliminates manual repositioning for multi-faceted parts).
Wire EDM machining is slower and costlier than alternative processes, with its material scope limited strictly to electrically conductive options.
Our Ideas Have Helped Clients Bring Hundreds Of Products To Market
What is CNC Machining?
CNC (computer numerical control) machining is an automated, high-speed manufacturing process for shaping metal/plastic stock. Common equipment includes 3/4/5-axis milling machines, lathes and routers, with cutting modes varying by tool/workpiece movement combinations.
Skilled machinists program tool paths via CAD models for final part geometry. CNC machines deliver high-precision, repeatable results for most metal alloys and rigid plastics, suiting aerospace, medical, robotics and other industries. Xometry offers CNC services with custom quotes for 40+ materials, from aluminum/acetal to titanium, PEEK and Teflon.
Quick links
Technical video
Stay Connected!
Manufacturing on Demand
Please fill in the following information to obtain plan details (information is confidential and not disclosed publicly), we will contact you within 24 hours, please keep your phone available!
Upload a 3D/2D model to see instant pricing, lead time, and DFM feedback.
