15 years one-stop China custom CNC machining parts factory
Upload your CAD files now to quickly receive a quote for custom Bakelite CNC machined parts. Suitable for both prototyping and mass production our engineering team will review your design and provide the most efficient manufacturing solution. We offer tight tolerances traceable materials short lead times and reliable quality.
Precision PEI (Ultem) parts with tolerances up to ±0.005 mm
100+ plastic materials and surface finishing, with material testing reports provided.
24-hour prototyping support with 1-to-1 engineering assistance and fast DFM analysis
12-step quality inspection process with 100% inspection of critical dimensions
ISO 9001, IATF 16949, and RoHS certified
16 yearsMachining Experience
2 HoursQuick Quote
0 PcsMinimum Order Qualities
98%Yield
Accelerate Your Product Development and Production with On-Demand Custom PEI (Ultem)CNC Machining Services
Are you looking for custom PEI (Ultem) CNC machined parts or rapid prototyping services for high-performance applications? You’ve come to the right place. Whether you need precision components for aerospace, medical devices, electronics, semiconductor equipment, automotive systems, or industrial machinery, we provide reliable prototyping and production solutions tailored to your requirements.
With extensive experience working with high-performance engineering plastics, VMT has supported many OEM manufacturers, engineers, and product developers in producing precision parts and functional prototypes for new products, components, and assemblies. Our team understands the challenges of machining advanced materials like PEI (Ultem) and applies optimized processes to ensure excellent dimensional stability, strength, and surface quality.
We offer industrial-grade CNC machining services, including high-precision CNC milling and turning, along with advanced manufacturing capabilities such as 3D printing, sheet metal fabrication, and injection molding when needed for complementary production processes. This integrated manufacturing capability ensures you receive parts that meet strict engineering specifications and performance requirements.
In addition, we provide a wide range of engineering materials, including high-performance plastics like PEI (Ultem), allowing you to produce lightweight, heat-resistant, and durable components designed to perform reliably in demanding environments. Our goal is to help you shorten development cycles, reduce manufacturing risks, and bring innovative products to market faster.
Custom Prototypes and High-Volume PEI (Ultem)CNC Machining Parts Manufacturing
24/7 CNC Machining Facility with Samples Ready in 7-10 Days
Our experienced engineering and manufacturing team specializes in custom PEI (Ultem) CNC machining, providing solutions for both rapid prototyping and batch production. We help customers overcome common challenges in machining high-performance plastics, ensuring precision, reliability, and fast delivery.
Our PEI CNC machining team combinestechnical expertise, advanced equipment, and material knowledgeto deliver high-performance parts that solve real engineering challenges, reduce time-to-market, and improve production efficiency for your projects.
Custom PEI (Ultem) CNC Machined Parts Manufacturing Process
Custom PEI (Ultem) CNC machining combines advanced milling, turning, and finishing processes to deliver high-precision, heat-resistant, and durable parts, solving tolerance, surface quality, and rapid prototyping challenges for demanding applications.
CNC Turn-Mill Combination Machining
Injection Molding
3D Printing
Extrusion Machining
PEI (Ultem) CNC Machined Parts Material
We use genuine Ultem (PEI) materials with full certification (COC, COA, RoHS) and complete traceability, ensuring compliant, reliable, and high-performance parts for aerospace, medical, and other critical applications.
Advantages: Excellent mechanical performance, high precision, and high repeatability.
Disadvantages: More limited geometric capabilities compared to 3D printing.
Applications: Aerospace brackets, housings, and interior components,Medical device housings and surgical instrument parts,Electrical connectors, insulators, and high-temperature electronic components,Industrial machinery components requiring heat resistance and mechanical stability,Semiconductor equipment parts, sensors, structural assemblies and custom components.
Available PEI (Ultem) at VMT: PEI Amber (ULTEM1000), PEI Black (ULTEM1000)，PEI Ultem 1000 (Unfilled general-purpose PEI)，PEI Ultem 2300 （30% Glass Filled PEI），Ultem 2301 / 2302 （Glass-filled or reinforced grades），Ultem 1000 Natural / Transparent and Custom PEI Blends.
Price: $$
Delivery Time: < 10 days
Wall Thickness: 0.5 mm
Tolerance: ±0.125 mm (±0.005 inches)
Maximum Part Size: 200 x 80 x 100 cm
PEI (Ultem) Properties
| Property |
Tensile Strength, Yield (MPa) | Elongation at Break (%) | Hardness (Rockwell R) | Heat Deflection Temperature (°C) | Density (g/cm³) |
| Typical Value |
110 MPa | 20% | Rockwell R 120 | 200 °C | 1.27 g/cm³ |
PEI Ultem 1000 (Unfilled General-Purpose PEI)
Ultem 1000 is an unfilled, general-purpose PEI with excellent dimensional stability, high tensile strength, and good electrical insulation. Its balance of strength, ductility, and machinability makes it ideal for precision CNC machined components such as aerospace interior brackets, medical device housings, and electronic insulators.
PEI Ultem 2300 (30% Glass-Filled PEI)
Ultem 2300 is reinforced with 30% glass fiber, providing higher stiffness, improved creep resistance, and enhanced structural performance compared to unfilled grades. This material is widely used for load-bearing or high-strength components, including structural aerospace parts, automotive sensor housings, and industrial machinery brackets.
Ultem 2301 / 2302 (Glass-Filled or Reinforced Grades)
These glass-filled or specially reinforced PEI grades offer superior mechanical strength, dimensional stability, and thermal resistance. They are suitable for precision CNC machined parts that require both high rigidity and long-term reliability, such as electronic housings, semiconductor equipment components, and structural supports in medical or industrial applications.
Ultem 1000 Natural / Transparent
Unfilled natural or transparent Ultem provides excellent chemical resistance and electrical insulation, while also allowing visual inspection of components. These grades are ideal for medical device parts, electrical insulators, and high-performance electronic housings where clarity and chemical resistance are important.
Custom PEI Blends
Specialty PEI blends can be formulated for enhanced impact resistance, higher temperature performance, or optimized machinability. These custom grades are used for engineering components requiring specific performance criteria, such as aerospace fittings, medical instruments, high-temperature electrical parts, or industrial assemblies that demand both durability and precision.
Custom Precision PEI (Ultem) CNC Machining Parts Gallery
Showcase your high-performance designs with precision custom PEI (Ultem) CNC machined parts, delivering tight tolerances, superior surface quality, and reliable performance for aerospace, medical, electronics, and industrial applications.
PEI (Ultem): National Standards and Equivalent Grades in Various Countries
We maintain a stock of over 40 types of certified materials, enabling us to quickly deliver precision prototypes and small-batch parts within 24 hours. Some of these materials are already IMDS certified.
| Country / Region | Standard / Trade Name | Equivalent Grade / Alternative Name |
| USA | Sabic Ultem | Ultem 1000, Ultem 2300, Ultem 2301, Ultem 2302 |
| Germany | Röhm PEI | Radel R, Radel A, PEI natural/glass-filled |
| Japan | Teijin PEI | PEI 1000, PEI 2300, PEI GF30 |
| China | Sabic / Local PEI | Ultem 1000, Ultem 2300, PEI natural / GF |
| Europe (General) | Ensinger PEI | TECAPEEK PEI (sometimes branded as PEI natural, PEI GF30) |
| South Korea | LG Chem PEI | PEI 1000, PEI 2300 (similar to Ultem) |
| India | SABIC Ultem / Local PEI | Ultem 1000, Ultem 2300, PEI GF |
Designing parts specifically for CNC machining can significantly improve manufacturing efficiency, reduce costs, and ensure higher part quality. When designing PEI (Ultem) CNC machined parts, engineers should consider the following guidelines.
| Design Guide |
Problem Description |
Design Suggestions | Notes |
| Wall Thickness | Although PEI is strong and rigid, extremely thin walls may cause deformation during machining. |
|
Depending on part size and geometry |
| Avoid Sharp Internal Corners | Sharp edges increase the risk of material cracking, so a rounded corner design is recommended. |
|
Designers should include internal radii that match the cutting tool size to improve machinability and reduce machining time. |
| Optimize Hole Depth-to-Diameter Ratio | In PEI CNC machining, the hole structure needs to be designed properly to avoid material breakage. |
|
Rounded corner structures can improve machining stability while enhancing the part’s strength. |
| Design for Proper Support and Fixturing | Parts with complex shapes or thin sections may require additional support during machining. |
|
Designing flat surfaces or locating features can help improve clamping stability. |
| Consider Thermal Expansion |
Because PEI has high thermal resistance, excessive cutting heat can cause surface burning or deformation. |
Optimized cutting parameters, proper tool selection, and effective cooling strategies help minimize heat generation. |
PEI has good dimensional stability, but thermal expansion may still affect extremely tight tolerance parts. |
PEI (Ultem) CNC Machined Parts Quality Inspection: Inspection Equipment
We use CMM, calipers, and height gauges for precise inspection of Bakelite CNC parts, providing full dimensional reports, traceable quality control, and ISO 9001 certification for reliable, consistent production.
3D Detection
Roundness Meter
Ultrasonic Cleaning
Blu-Ray 3D Scanning
Electronic Height Gauge
Air Tightness Test
2D Detection
Hardness Testing
Surface Finish Inspection
IPQC Inspection
Microscope Surface Inspection
Salt Spray Tester
PEI (Ultem) CNC Machined Parts Surface Finishing Options
We offer precision surface finishing for PEI (Ultem) CNC parts, including polishing, deburring, and fine machining, ensuring smooth, burn-free surfaces and meeting complex aesthetic and functional requirements for high-performance applications.
As Machined
Sand Blasting
Painting
Custom Surface Patterns
Teflon Coating
Vapor Polishing
Flexible Turnaround Time
We customize production schedules for various projects to ensure we meet your PEI (Ultem) CNC machining needs.
Project Type
Urgent high-Precision Samples
CNC Prototype Manufacturing
Molding Requirements
High-Volume Production
Turnaround Time
24-Hour Delivery
Simple Parts: 1–3 days,Complex Parts: 3–7 days
Mold Production: Completed in 5 days, with samples delivered within 7 days.
Lead Times: Depend on part complexity, with typical delivery within 2–4 weeks, always meeting customer deadlines.
For projects with urgent deadlines, please contact us immediately for expedited processing.
Advantages and Disadvantages of PEI (Ultem) CNC Machining
PEI (Ultem) CNC machining offers a balanced combination of performance, precision, and cost efficiency, but it also has certain limitations. Below is a clear overview of the advantages and disadvantages of PEI (Ultem) CNC machining:
Advantages of PEI (Ultem) CNC Machining
Disadvantages of PEI (Ultem) CNC Machining
Applications of CNC Machined PEI (Ultem) Parts
CNC machined PEI (Ultem) parts are widely used across industries that demand high-performance, heat-resistant, and chemically stable components. Typical applications include:
PEI (Ultem) CNC machined parts are ideal wherever dimensional stability, mechanical strength, thermal resistance, and electrical insulation are critical.
FAQs About Custom PEI (Ultem) CNC Machining Parts
Is PEI (Ultem) suitable for CNC machining?
Yes. PEI (Ultem) is a high-performance thermoplastic with excellent strength, dimensional stability, and heat resistance, making it ideal for precision CNC machining.
What are the typical tolerances for CNC machined PEI parts?
Typical tolerances range from±0.01 mm to ±0.02 mm, depending on part geometry and machining requirements.
Can PEI (Ultem) parts withstand high temperatures?
Yes. PEI maintains its mechanical performance up to170°C, making it suitable for aerospace, medical, and electronic applications.
What surface finishes are available for PEI CNC machined parts?
We offerpolishing, deburring, vapor polishing (for transparent parts), sanding, and precision machiningto achieve smooth, burn-free surfaces.
What industries commonly use PEI CNC machined parts?
PEI parts are used inaerospace, medical devices, electronics, automotive, industrial machinery, and semiconductor equipment.
Do you provide material certification and traceability?
Yes. All PEI (Ultem) parts are made fromgenuine, certified materials(COC, COA, RoHS) with full traceability from raw material to finished component.
Can you produce both prototypes and production batches?
Yes. We supportrapid prototyping (3–5 days) and low-to-medium volume production, ensuring consistent quality and dimensional accuracy.
Which PEI (Ultem) grades do you machine?
We machineUltem 1000 (unfilled), Ultem 2300 (30% glass-filled), Ultem 2301/2302 (reinforced), natural/transparent Ultem, and custom PEI blends.
What are the benefits of choosing CNC machining over injection molding for PEI parts?
CNC machining providestight tolerances, faster prototyping, flexible design modifications, and high-quality surfacesfor small to medium batches.
How do you ensure the quality of PEI CNC machined parts?
We use CMM, digital calipers, optical inspection, and strict quality control processesto verify tolerances, surface quality, and material compliance.
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2024-08-02
The manufacturer is strongly recommended. In the past few years of cooperation we have ordered several machined products from aluminum and stainless steel. These products are manufactured in compliance with tolerance requirements and require product finish. Now I have ordered another one. The service is excellent and any questions can be answered and resolved in time.
2021-05-13
The dimensions are all customized according to my drawings no tolerance issues and the parts are delivered on time. I am very satisfied with it.
2021-04-06
I pay much attention to the surface treatment aspect of this product. I was a little worried about the cooperation at the beginning. I am very satisfied with the product now and hope to cooperate for a long time.
2022-09-22
AN8 Straight PTFE Hose End Fitting for PTFE Fuel Line Fitting Adapter Black Blue Red
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