Suzhou Krosino Mechatronic Technology Co., Ltd. delivers high-end, build-to-print manufacturing solutions through our specialized, professional CNC Aluminium Machining infrastructure. Engineered to achieve an optimal balance of corrosion resistance, surface hardness, and strict geometric tolerances, our make-to-order Black Anodized CNC Parts are tailored specifically to meet the rigid quality benchmarks of global OEM procurement teams. By pairing precision multi-axis machining paths with closely monitored electrochemical oxidation, we produce durable, non-reflective mechanical spare parts that integrate seamlessly into complex industrial equipment lines and automated machinery structures.
Maintaining tight tolerances on aluminum parts requires deep technical expertise, especially when accounting for the microscopic dimensional changes caused by chemical surface treatments. Our facility handles both precision machining and advanced coating calculations under one unified quality management process. By calculating exact material removal offsets prior to the black anodization step, we guarantee that critical internal threads, bearing journals, and slider grooves fit perfectly upon final assembly, saving your engineering team valuable time and reducing assembly errors.
Our rigid multi-axis milling infrastructure optimizes stepover control and surface finishing for intricate contours and deep pockets. This advanced setup ensures minimal distortion and accurate wall thicknesses across complex lightweight housings, brackets, and electronic enclosures via our custom CNC Milling Services.
Utilizing stable spindle configurations and high-grade indexable inserts, we control cylindrical roundness down to single-micron limits. This guarantees high-efficiency cycle times and a uniform surface topology for stepped shafts, precision pins, and custom flanged spacers across our Precision Turning Parts.
| Parameter | Technical Standard / Capacity |
|---|---|
| Core Machining Scope | Full-scale make-to-order CNC Machining, lathe turning, multi-axis profile milling, precision boring, and fine thread tapping. |
| Dimensional Tolerance | Linear dimensions held reliably to ±0.01mm; critical internal bores and bearing journals held within ±0.005mm before coating. |
| Anodizing Standards | Type II Matte/Gloss Black Anodizing (standard corrosion resistance) and Type III Black Hardcoat Anodizing (maximum mechanical wear protection). |
| Surface Roughness | As-machined finish achieving Ra 0.8–1.6 μm; specialized turning or post-machining polishing paths can achieve smooth seal zones down to Ra 0.4 μm. |
| Material Framework | Premium Aluminum Alloys (6061-T6, 7075-T6, 2024, 5052), High-Strength Stainless Steel (SUS303, SUS304, SUS316), and Engineering POM (Acetal). |
| Pre-Treatment Options | Glass bead blasting (for a uniform matte appearance), chemical etching, industrial degreasing, and advanced Parts Surface Finishing. |
| B2B Production Scale | Optimized for fast engineering prototyping via our Rapid Prototyping Service before advancing to full-volume contract delivery. |
Our make-to-order black anodized aluminum parts deliver dependable performance across highly demanding automated and mechanical setups worldwide. Backed by verifiable raw material traceability certifications and comprehensive coordinate measuring machine (CMM) testing reports, we ensure complete compliance with your engineering designs.
Q1: How does Krosino manage machining tolerances to account for the thickness layer added during black anodizing?
Anodizing is an electrochemical process that grows an aluminum oxide layer both into and onto the surface of the metal. Type II anodizing typically alters the surface dimension by 5–25 μm, whereas Type III Hardcoat adds 50 μm or more. To preserve critical clearances on precision turned shafts or internal bores, our engineers apply pre-machining compensation rules in our CAM software. We machine the raw aluminum features slightly under or oversized, ensuring that the component reaches its exact blueprint dimensions after the coating layer stabilizes.
Q2: What causes color fading on black anodized parts, and how do your processing steps prevent it?
Color fading or shifting on anodized components occurs when the microscopic pores of the oxide layer are not completely saturated with organic dyes, or if the subsequent hot-water sealing process is insufficient. We prevent this issue by maintaining rigorous temperature controls during chemical immersion and using premium, UV-stable black dyes. Following coloration, our components undergo an extended, high-purity hydrothermal sealing stage that locks the dye deep within the aluminum oxide matrix, ensuring long-term color durability under harsh indoor or outdoor industrial environments.
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