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Large CNC Machining Services
At Istar Machining, we tackle the biggest machining challenges with our advanced large CNC machining capabilities. Our industrial-strength equipment handles massive parts that smaller shops simply can’t manage. When your project demands both size and precision, our team delivers results that stand up to the toughest requirements.
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20+ Years
Istar Machining's years in the industry
300,000 square feet
The size of Istar Machining's factory
856 CNC machines
Our CNC equipment count
2000+ skilled workers
Istar's number of skilled machinists/operators
Materials We Machine for Your Large-Scale Projects
We can work with almost any material your project requires:
Metals
Steel (Carbon & Alloy)
Stainless Steel
Aluminum Alloys
Titanium Alloys
Cast Iron
Other Metals
Steel (Carbon & Alloy)
Highly versatile and strong, steel is a cornerstone material for large structural components, heavy machinery frames, molds, and fixtures. We machine various grades of carbon and alloy steels, tailored for strength, hardness, and wear resistance required in large-scale applications.
Common Grades/Types:
Carbon Steel: 1018, 1045, A36, A516
Alloy Steel: 4140, 4130, 4340, 8620
Common Surface Treatments: Painting, Powder Coating, Black Oxide, Zinc Plating, Nickel Plating, Chrome Plating, Nitriding, Carburizing, Anodizing (for specific steel alloys), Passivation, Heat Treatment (Annealing, Normalizing, Quenching & Tempering).
Stainless Steel
Valued for its excellent corrosion resistance, strength, and hygienic properties. Ideal for large components used in harsh environments, such as chemical processing, energy sector equipment (e.g., turbine parts), food processing machinery, and large architectural elements.
Common Grades/Types: 303, 304/304L, 316/316L, 410, 416, 420, 17-4PH, Duplex Stainless Steels.
Common Surface Treatments: Passivation (critical for enhancing corrosion resistance), Electropolishing, Bead Blasting, Brushing, Mirror Polishing, Pickling (post-welding/heat treatment).
Aluminum Alloys
Offering an exceptional strength-to-weight ratio, good machinability, and corrosion resistance, aluminum alloys are crucial for large aerospace structures, automotive frames, large electronic enclosures, and lightweight tooling or fixtures.
Common Grades/Types: 2024, 5052, 6061-T6/T651, 7075-T6/T651, MIC-6, ATP-5 (Cast Tool & Jig Plate).
Common Surface Treatments: Anodizing (Type II Clear/Color, Type III Hardcoat), Chromate Conversion Coating (Alodine/Chem Film), Powder Coating, Painting, Brushing, Polishing, Laser Etching.
Titanium Alloys
Known for their superior strength-to-weight ratio, excellent corrosion resistance, and high-temperature performance. Titanium is often specified for demanding large applications in aerospace (e.g., airframe components, landing gear), defense, and high-performance industrial equipment.
Common Grades/Types: Grade 2 (Commercially Pure), Grade 5 (Ti-6Al-4V), Grade 9 (Ti-3Al-2.5V).
Common Surface Treatments: Anodizing (Type II for color/wear, Type III for enhanced wear), Passivation, Heat Treatment, Shot Peening, Thermal Spray Coatings (for specific wear or thermal barrier needs).
Cast Iron
Provides excellent machinability, superior vibration damping, compressive strength, and cost-effectiveness for large, heavy parts. Commonly used for machine bases, engine blocks, large gear housings, pump bodies, and other heavy equipment components requiring stability.
Common Grades/Types:
Grey Iron: ASTM A48 (e.g., Class 30, Class 40)
Ductile Iron: ASTM A536 (e.g., 60-40-18, 80-55-06)
Common Surface Treatments: Painting, Powder Coating, Blackening, Phosphate Coating, Stress Relieving (heat treatment is crucial for dimensional stability of large castings).
Other Metals
Our capabilities extend beyond the metals listed above. We also have experience machining large components from materials such as Copper alloys (Brass, Bronze), Nickel alloys (Inconel®, Monel®), Superalloys, and more.
Examples of Other Metals & Grades:
Brass: C360 (Free-Cutting Brass)
Bronze: C932 (Bearing Bronze), C954 (Aluminum Bronze)
Nickel Alloys: Inconel® 625, Inconel® 718, Monel® 400
Surface Treatments: Highly dependent on the specific alloy; common options include plating, passivation, and specialized coatings. Please contact us to discuss your specific large-scale metal machining requirements.
Plastics
Nylon (PA - Polyamide)
Acetal (POM / Delrin®)
UHMWPE (Ultra-High Molecular Weight Polyethylene)
Polycarbonate (PC)
PEEK (Polyether Ether Ketone)
Other Plastics
Nylon (PA - Polyamide)
- A tough and wear-resistant thermoplastic, often used for large gears, wear pads, rollers, and structural components where metal is not suitable. Offers good chemical resistance and strength for sizable industrial parts.
- Common Grades/Types: Nylon 6, Nylon 6/6, Cast Nylon, MDS-filled Nylon (Molybdenum Disulfide for lubricity), Glass-filled Nylon (for increased strength and stiffness).
- Common Surface Treatments: Typically “as-machined” finish. Annealing (for stress relief and dimensional stability in large parts). Dyeing is possible. Vapor polishing (limited applicability).
Acetal (POM / Delrin®)
Known for its excellent machinability, high stiffness, dimensional stability, low friction, and good wear resistance. Ideal for large precision components, large bushings, rollers, conveyor parts, and complex fixtures.
Common Grades/Types: POM-C (Copolymer, e.g., Celcon®), POM-H (Homopolymer, e.g., Delrin®), PTFE-filled (for enhanced lubricity), Glass-filled.
Common Surface Treatments: “As-machined” finish is often sufficient. Mechanical polishing for smoother surfaces. Difficult to bond or paint without specialized surface preparation/primers.
UHMWPE (Ultra-High Molecular Weight Polyethylene)
Offers exceptional abrasion resistance, high impact strength, and low coefficient of friction. Often machined into large wear strips, chute liners, guide rails, and components for material handling systems.
Common Grades/Types: Virgin (Natural), Reprocessed, Anti-static grades, various colors.
Common Surface Treatments: “As-machined” finish. Its inertness and low friction make adhesion of coatings or paints very difficult.
Polycarbonate (PC)
Features high impact strength, good temperature resistance, and dimensional stability. Suitable for machining large protective guards, housings, large transparent prototypes (machining affects clarity), and structural elements requiring toughness.
Common Grades/Types: Machine Grade PC, General Purpose PC, UV-stabilized PC, Glass-filled PC.
Common Surface Treatments: “As-machined” finish. Vapor polishing can improve clarity on machined surfaces (more common for smaller parts). Can be painted with appropriate primers. Anti-scratch coatings can be applied.
PEEK (Polyether Ether Ketone)
A high-performance thermoplastic with excellent mechanical strength, high temperature resistance, chemical inertness, and wear resistance. Used for demanding large components in aerospace, medical, energy, and semiconductor industries.
Common Grades/Types: Unfilled (Virgin), Glass-filled (e.g., PEEK GF30), Carbon-filled (e.g., PEEK CF30), Bearing Grade (e.g., PEEK HPV with Carbon Fiber, Graphite, PTFE).
Common Surface Treatments: “As-machined” finish. Annealing for stress relief is common. Due to its chemical inertness, surface coating is specialized and not typical.
Other Plastics
We can also machine other large plastic parts from materials like ABS, PVC, PTFE (Teflon®), Acrylic (PMMA), Polypropylene (PP), and more.
Examples of Other Plastics & Grades:
ABS: General Purpose, Flame Retardant
PVC: Type I (Rigid), Type II (High Impact)
PTFE: Virgin, Glass-filled, Carbon-filled
Acrylic (PMMA): Cast, Extruded
Surface Treatments: Varies significantly by plastic type. Some (like ABS, Acrylic) can be polished or painted. PTFE is very inert. Contact us to discuss your specific large-scale plastic machining and finishing needs.
Large CNC Products Produced by Istar Machining
Industries We Serve
Our large CNC machining services help many different industries create their biggest, most important parts:
Our Quality Promise
When you work with Istar Machining, quality isn’t just a goal – it’s a guarantee:
- Precision Guarantee: All parts inspected with CMM (Coordinate Measuring Machine) technology
- ISO 9001:2015 Certification: Following strict quality management standards
- AS9100 (aerospace): Meeting the highest standards for flight-critical components
- ITAR compliance: Secure handling of defense-related projects
Large CNC Machining Capabilities
Our massive 5 axis machining centers can create almost any shape or feature in your large parts:
- Deep-hole drilling: Perfect bores up to 4 meters deep
- Thread grinding: Precise threads even on huge diameters
- Contour milling: Complex 3D shapes in massive workpieces
- Precision boring: Perfectly round holes in the largest components
Quality Testing for Maximum Confidence
Every large part undergoes thorough testing:
- X-ray inspection: Finding any hidden defects
- Ultrasonic testing: Verifying material integrity
- Stress testing: Ensuring parts meet load requirements
- Dimensional verification: Checking every critical measurement
The Environmental Advantage
Our large CNC machining service is more environmentally friendly than you might think:
- Material Efficiency: Computer optimization reduces waste
- Recycling: We capture and recycle metal chips
- Energy Management: Smart systems reduce power consumption
- Clean Coolants: Environmentally friendly cutting fluids
Why Choose Istar Machining for Large Parts?
Superior Precision
Even on massive parts, we maintain tolerances as tight as ±0.001" - that's thinner than a human hair! This level of precision means your components fit perfectly the first time.
Cost Efficiency
Our CNC machining service delivers 20-30% savings compared to traditional methods. We optimize material usage and machining time to keep your costs down.
Fast Turnaround
Even for huge parts, we deliver on time:
5-7 days for complex prototypes
3-5 days for bulk production orders
End-to-End Support
From design to finishing, we handle every step:
DFM Analysis: We review your designs to suggest improvements that save money and time
Secondary Services: Welding, coating, assembly, and more
Quality Control: Complete inspection and documentation
How Our Process Works
Submit Your Design
Upload your CAD files for review
Get DFM Feedback
Our engineers suggest improvements
Approve Quote
Clear pricing with no hidden fees
Production
Your part moves to our large machine shop
Quality Check
Every part inspected for perfect accuracy
Start Your Large CNC Project Today
Ready to bring your biggest ideas to life? Istar Machining is ready to help:
- Request a Quote: Upload your designs for rapid pricing
- Consult Our Engineers: Get expert advice on your project
- Review Your DFM Report: See how we can improve your design
- Approve Production: Watch your project come to life
Contact us today to discuss your large CNC machining needs!
Frequently Asked Question
Large CNC machining means using computer-controlled machines to cut, shape, and finish very big parts. This isn’t your standard machining – we’re talking about parts that can weigh up to 80 tons and measure over 10 meters in length!
We can handle parts up to 10+ meters long and weighing up to 80 tons. For specific requirements, please contact us directly.
Typical lead times are 15-20 days for prototypes and 30-45 days for production runs, depending on complexity and quantity.
Yes! We regularly work with titanium, Inconel®, duplex stainless steel, and many other challenging materials.
Absolutely. Our engineering team provides complete DFM (Design for Manufacturing) analysis to optimize your designs.
We work with aerospace, energy, oil & gas, mining, construction, defense, marine, and many other sectors that need large-scale precision components.
We’re ISO 9001:2015 certified, AS9100 compliant for aerospace, and ITAR registered for defense projects.
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