6061-T6 Aluminum Heat Sink Cylinder with Mirror Finish and Precision Cooling Slots
Mirror Finish Heat Sink Cylinder
,Turn-Mill Slot Machining
,6061 Aluminum Heat Sink 0.01mm
This 6061 aluminum heat sink cylinder is machined by Dongguan Changxinda Precision Technology Co., Ltd., a CNC factory established in 2008. The cylinder body and its cooling slots are produced in a single turn-mill setup on combined lathes, and the outer surface is brought to a mirror finish for both thermal radiation and appearance. Critical features — bore, slot depth and concentricity — are held to ±0.01 mm and verified on a CMM.
A heat sink cylinder works by moving heat from a device through its body and out through fins or slots into the air. Slot depth, wall thickness and surface finish all affect how efficiently it dissipates heat. A mirror finish raises surface emissivity and looks premium; accurate slot depth keeps the thermal path uniform and avoids thin-wall hot spots. Turn-mill machining lets us cut the round body and the flat-bottom slots without losing concentricity.
- FinishMirror Ra — polished OD and slot walls for heat and looks
- ProcessTurn-Mill — cylinder body and slots in one setup
- Min Order1 piece — no tooling charge, prototype ready
ISO 9001:2015 · 6061-T6 aluminum · CMM first-article report · NDA on request · Exporting since 2008
Each heat sink cylinder follows a controlled eight-stage route:
- Drawing review & DFM: STEP / IGES / SolidWorks / 2D PDF checked for slot depth, wall thickness, finish and tolerances.
- Material: 6061-T6 aluminum bar with mill certificates (good thermal conductivity).
- Turn-mill programming: CAM toolpaths combining turning the body/bore and milling the cooling slots in one setup.
- Turning: OD and bore machined for concentricity and wall thickness.
- Slot milling: cooling slots cut to depth without re-chucking, preserving concentricity.
- Mirror finishing: polished OD and slot walls to the required Ra.
- Surface treatment: clear/color anodizing or per drawing.
- CMM inspection: bore, slot depth, concentricity and profile verified with a first-article report.
The mirror-finish slotted cylinder is a starting point. We machine custom heat sink cylinders with your own diameter, slot count, slot depth and width, fin profiles and finishes — all to drawing.
We sign an NDA before engineering review, restrict drawings to the assigned programming and machining team, and never display or reuse customer geometry. Fixtures and programs built for your part stay dedicated to your program, and surplus or reject parts are scrapped on request.
Changxinda runs a 2008-established plant with 90+ staff, multiple turn-mill lathes and 4-axis / 5-axis machining centers backed by a dedicated QC lab.
One shop, ten industries, one inspection standard:
- Consumer ElectronicsPhone / tablet / laptop housings, heat sinks, camera brackets, VR/AR headset structural parts, smart wearable shells
- Automation & Industrial EquipmentAutomation fixtures, jigs, module frames, transmission sliders, motor mounts, sensor housings, assembly line components
- Semiconductor & Vacuum EquipmentVacuum chambers, vacuum fittings, precision bases for semiconductor equipment, thermal and insulating parts, inspection tooling
- Medical EquipmentSurgical instrument bases, medical testing instrument housings, endoscope accessories, medical aesthetic device structural parts (medical-grade aluminum / stainless steel)
- AutomotiveNew-energy motor housings, battery end plates, sensor brackets, headlamp structural parts, modified parts, hydraulic valve blocks
- Aerospace & UAVAircraft structural parts, drone frames, landing gear accessories, aviation instrument housings (lightweight precision parts)
- Optics & PhotonicsOptical lens barrels, lens mounts and bases, light source heat sinks, camera module brackets, inspection optical platforms
- Communications5G heat dissipation cavities, filter parts, signal adapter structural parts, communication equipment housings
- RoboticsRobotic arm joint parts, robot bases, reducer housings, AGV structural parts
- Instruments & MetersTesting equipment housings, precision gauge bases, flow meter parts, laboratory equipment accessories
- Mirror-finish OD and slot walls for thermal and visual quality
- ±0.01 mm on bore, slot depth and concentricity
- Cylinder body and slots cut in a single turn-mill setup
- 6061-T6 aluminum with high thermal conductivity
- Uniform slot depth for even heat dissipation
- Clear/color anodizing and custom finishes
- NDA and IP protection on request
- CMM inspection with first-article report
- From 1-piece prototypes to scheduled production
- ISO 9001:2015 certified quality system
| Product Type | 6061 aluminum heat sink cylinder with cooling slots |
|---|---|
| Machining | Turn-mill composite, single setup |
| Tolerance | ±0.01 mm on critical features |
| Material | 6061-T6 aluminum (high thermal conductivity) |
| Finish | Mirror finish OD and slot walls |
| Surface Treatment | Clear / color anodizing / per drawing |
| Inspection | CMM + first-article report |
| MOQ | 1 piece |
| Lead Time | 3–7 days prototypes |
Yes — a smoother, polished surface raises emissivity and reduces surface defects that trap air, improving radiant and convective heat transfer while giving a premium look.
Slots are milled in the same setup as the body and inspected on a CMM to ±0.01 mm, keeping the thermal path uniform and avoiding thin-wall hot spots.
Yes — diameter, slot count, depth, width and fin profile can be machined to your drawing or 3D model.
6061-T6 aluminum as standard, with clear/color anodizing or custom coatings. Other aluminum grades and metals are available on request.
Yes, before engineering review. Drawings are limited to the assigned programming and machining team and never reused or displayed.
Prototypes 3–7 days, small batches 7–14 days, mass production 14–30 days depending on complexity, with rush support available.
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