Semi-Circular Clamp Sunflower Extruded Aluminum Heat Sink With Blue Anodizing
Curved clamp type aluminum sunflower heat sink with radial fins for miniature stepping motors and cylindrical LED lights, custom cut length & multi-color anodizing available. Request your quote now.
- Product Introduction
Custom Curved Wrap-Around Cooler for Cylindrical Heat Sources
This semi-circular sunflower heat sink is a one-piece extruded aluminum cooling solution specially designed for cylindrical heating components. Made from 6063-T5 aluminum alloy with custom blue color anodizing, its curved inner cavity tightly wraps round heat sources, while radial outer fins deliver all-around passive heat dissipation. An integrated side mounting clip simplifies fixation without extra clamps. Raw long extrusion bars support custom cut-to-length, CNC machining and multi-color anodizing for small motors and circular LED lights.
Product Specification
| Parameter | Technical Details |
| Material | 6063-T5 Aluminum Alloy |
| Thermal Conductivity | 205–210 W/m·K |
| Profile Structure | Semi-circular inner wrap cavity + radial sunflower fins + one-side integrated mounting clip |
| Custom Length | Arbitrary cutting from 20mm–3000mm |
| Surface Treatments | Mill finish, black/silver anodizing, custom color anodizing (blue, purple, red, gold etc.) |
| Secondary Machining | CNC inner bore expanding, tapping, deburring, clip slot milling |
| Dimensional Tolerance | ±0.1mm for cutting length; ±0.2mm for inner arc & fin dimension |
Key Features
1. Curved Semi-Circular Inner Cavity Fits Cylindrical Components Perfectly
Unlike flat heat sinks with limited contact area, the smooth semi-circle inner surface fully wraps around round heat sources such as miniature motors and cylindrical LED chips, eliminating air gaps and cutting contact thermal resistance drastically.
2. Radial Sunflower Fins for 360° All-Around Airflow
Evenly spaced radial outer fins create unobstructed circular airflow channels around the heat sink. Hot air dissipates evenly in all directions without stagnant hot zones, offering stable fanless silent cooling performance.
3. Integrated Side Clip Simplifies Assembly & Reduces Parts Cost
The built-in mounting clip on one side reserves a fixing hole for direct screw locking onto equipment housings. Separate metal clamps are no longer required, shortening assembly time and lowering accessory procurement costs.
4. Custom Color Anodizing Improves Durability & Brand Differentiation
The thick blue anodic film enhances scratch resistance and anti-corrosion performance for indoor and mild outdoor environments. Custom colored finishes help your miniature equipment stand out from standard silver/black cooling parts on the market.
5. Flexible Customization for Mini Equipment
Long raw extrusion blanks can be cut to any required length. We can adjust inner arc diameter, fin height and clip size via CNC machining to match your exact cylindrical component dimensions.
Application
1. Micro motor equipment: small stepping motors, miniature DC servo motors, cylindrical drive motors
2. Circular LED lighting: cylindrical COB spotlights, miniature round fill lights, compact point light sources
3. Mini power components: tubular power resistors, cylindrical LED driver modules, small heating tube coolers
Why Choose Our Semi-Circular Wrap-Around Sunflower Heat Sinks?
1. Over 20 years of specialized aluminum extrusion experience for miniature curved cooling profiles
2. Independent anodizing workshop supporting full custom color surface finishing
3. Fast sample delivery without expensive new mold development for standard semi-circle profiles
4. thermal engineering support to optimize fin layout for small cylindrical heat loads
5. Flexible order volumes covering prototype samples, small trial batches and mass OEM production
6. Fully compliant with ISO 9001, RoHS and REACH standards for worldwide market sales
7. Dedicated multilingual foreign trade sales team with stable worldwide logistics support
Contact our thermal engineering team today to get customized size, machining and color anodizing quotation for your cylindrical equipment cooling project.
Frequently Asked Questions about Semi-Circular Wrap-Around Sunflower Heat Sinks
FAQ 1: What makes this semi-circular heat sink better than flat heat sinks for cylindrical parts?
It features a smooth curved inner cavity that fully wraps around round heat sources, creating much larger contact area than flat coolers. This eliminates air gaps between the heat sink and cylinder, greatly reducing thermal resistance and improving heat transfer efficiency.
FAQ 2: Is the side mounting clip strong enough to hold the heat sink firmly?
Yes. The clip is integrally extruded as one part with the whole heat sink without welding, so it maintains stable structural strength after long-term use. You can fasten a screw through the reserved hole on the clip to lock it tightly on your equipment housing.
FAQ 3: Can I customize other anodizing colors besides blue?
Absolutely. We offer a full range of custom anodizing colors including silver, black, purple, red, gold and more. The anodic protective film improves scratch and rust resistance, and unique colors help differentiate your product lines.
FAQ 4: What kinds of products is this curved sunflower heat sink mainly used for?
It is ideal for all small cylindrical heat-generating devices: miniature stepping motors, small DC servo motors, cylindrical COB LED spotlights, tubular power resistors and mini round LED driver modules.
FAQ 5: Can you adjust the inner semicircle diameter to fit my round component size?
Yes. We can cut the raw extrusion to your target length, and perform CNC machining to expand or modify the inner arc diameter, adjust fin height or rework the mounting clip according to your drawings and sample dimensions.
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