High-Precision CNC Machined Aluminum & Stainless Steel Parts – Custom Metal Cylindrical Sleeves

Get precision, speed, and reliability with High Precision CNC Machined Aluminum Parts from Proto Industry Manufactory — your one-stop solution for custom metal and plastic components. Whether you need stainless steel cylindrical sleeves, aluminum parts, or custom machined metal components, our CNC machining services deliver accuracy, durability, and rapid turnaround for prototypes and production alike.

Custom CNC Machining for Any Design

Upload your STP, IGS, STL, PDF, or DWG files and let our advanced CNC machines produce your parts with tolerances as tight as 0.01–0.05mm. From prototypes to small or large production runs, every component is manufactured to your exact specifications, ensuring seamless integration into your projects.

Wide Material Selection

Choose from over 30 materials including:

• Aluminum Alloys (EN AW-6061, EN AW-7075, custom alloys)

• Stainless Steel (1.4301, 1.4404, 1.4571, custom grades)

• Steel & Brass (C45, 16MnCr5, CuZn39Pb3, custom)

• Titanium (Grade 2 & Grade 5)

• Polymers (ABS, POM, Nylon, PC, PEEK, PTFE, and custom materials)

Versatile Finishes

Enhance your parts with a variety of surface treatments to match functional or aesthetic requirements:

• Polishing, matte, anodizing, powder coating

• Electropolishing, passivation, gold plating, zinc coating

• Black oxide, tempering, carburising, and more

Rapid Turnaround & Quality Assurance

Proto Industry offers fast production with lead times of just 3–5 days for prototypes. Every part undergoes stringent inspections at multiple stages — material checks, in-process sampling, and pre-shipment quality control — ensuring top-tier accuracy and durability.

Why Choose Proto Industry Manufactory?

• MOQ: 1PCS sample accepted

• Fast Global Shipping: DHL, FedEx, UPS, and more

• Flexible Payment: TT or PayPal (50% deposit, balance on finished parts)

• Privacy & Security: NDA available for sensitive designs

• Expert Support: Engineers assist with design, material, and finishing options

Whether you need precision cylindrical sleeves, custom aluminum components, or complex stainless steel parts, Proto Industry makes it simple: send your 3D files, select materials and finishes, and receive high-quality machined parts fast.