Custom Heat Sink Cylinder with Non-Standard Slots and Turn-Mill CNC Machining Held to 0.01mm Tolerance for OEM Thermal Part Production

Need a heat sink that is not a standard part? Dongguan Changxinda Precision Technology Co., Ltd. machines fully custom, non-standard heat sink cylinders and thermal components to your drawing or 3D model. Since 2008 the factory has built one-off prototypes and scheduled production batches for 200+ customers across ten industries, exporting 50–60% of its output overseas.

We are build-to-print: you define the diameter, slots, fins, cavity and finish, we return a manufacturability review and a quote, then machine, inspect and ship. Critical features — bore, slot depth and wall thickness — are held to ± 0.01 mm and verified on a CMM whether you order one prototype or a recurring batch.

Custom does not mean uncertain. Our workflow keeps you in control from drawing to delivery:

1. Send drawings: 2D PDF, STEP, IGES or SolidWorks — or a physical sample to reverse-engineer.
2. DFM review: engineering feedback on slots, wall thickness, finish, material and cost before you commit.
3. Quote in 24h: transparent pricing by drawing and quantity, no tooling charge.
4. Program & fixture: dedicated turn-mill CAM and fixtures for your heat sink.
5. CNC machining: turning and milling to ±0.01 mm on critical features.
6. Finish & inspect: mirror polish, anodizing or coating, then CMM dimensional report.
7. Ship: protected export packing to your schedule.

Non-standard is our normal work. Custom diameters, slot and fin patterns, cavity shape, wall thickness and mounting features — all machined to print.

Confidentiality is a condition of the job, not an add-on. We sign an NDA before engineering review, limit drawing access to the assigned programming and machining team, keep your fixtures and programs dedicated to your program, and scrap surplus or reject parts on request. You keep the IP; we keep it that way.

Changxinda is a 2008-established CNC factory with 90+ staff, multiple turn-mill lathes and 4-axis / 5-axis machining centers backed by a dedicated QC lab.

Custom heat sink work for ten industries, all under one roof and 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

• 100% custom heat sink cylinders and thermal parts built to drawing
• ±0.01 mm on bore, slot depth and wall thickness
• NDA and IP protection before engineering review
• Materials: aluminum, copper-alloy, stainless, brass
• Finish: mirror polish, anodizing, coating
• Dedicated turn-mill fixtures and programs per customer part
• No tooling charge, MOQ from 1 piece
• Stable scheduled batches for repeat orders
• 200+ served customers, 50–60% exported
• ISO 9001:2015 certified factory