| Tolerance Type | Description |
| Precision Tolerance | Parts are manufactured and inspected strictly according to your drawing specifications and GD&T annotations, with a minimum tolerance of ±0.05 mm. |
| General Tolerance | ±0.05 mm |
| Minimum Feature Size | 0.5 mm. The exact minimum feature size may vary depending on the part geometry and selected material. |
| Threading & Tapped Holes | Capable of machining any standard thread sizes, as well as customized thread specifications. |
| Edge Condition | Sharp edges are deburred and chamfered by default. |
| Surface Finishing | Anodizing, Powder Coating, Spray Painting, Laser Engraving, Silk Screen Printing |
| Minimum Wall Thickness | 0.5mm |
| Minimum End Mill Size | 0.5mm |
| Minimum Drill Hole Size | 1mm |
| Minimum Part Size | CNC Milling: 5 × 5 × 5 mm; CNC Turning: 2 × 2 mm; |
| Maximum Part Size | CNC Milling: 4000 × 1500 × 600 mm
CNC Turning: 200 × 500 mm |
Black anodized aluminum heat sinks are the standard cooling solution for power supplies, audio amplifiers, motor drivers and PCB-mounted power electronics. Extruded from 6063 aluminum with dense, closely spaced fins, each sink is CNC-cut to length, drilled with mounting holes and finished in a matte black anodize that resists corrosion and wear.
The flat milled base seats tightly against TO-220, TO-247 and IGBT packages with thermal grease, while the notched side tabs and drilled holes bolt the sink directly to a PCB, chassis or standoff bracket - no extra brackets. The black finish also hides fingerprints and machining marks, which matters for amplifiers, industrial controls and exposed-equipment cooling.
We supply standard black-anodized profiles cut to your size, or custom-extrude non-standard fin geometries for higher power dissipation. Every sink is dimensionally inspected and can be supplied with clear, black or other color anodizing, from prototype samples to 50,000+ pieces per month, under NDA.
Closely spaced fins maximize cooling surface area per unit volume for natural-convection and forced-air power electronics.
Milled base surface seats evenly against TO-220/TO-247/IGBT packages, minimizing thermal resistance between die and sink.
Controlled black hard anodize protects against corrosion and gives a consistent, premium finish on exposed equipment.
From aerospace-grade aluminum to medical-certified engineering plastics, our in-house CNC machining centers work a broad range of metals and plastics under one roof.
Don’t see your material? Send your drawing for review — we will confirm availability and quote it.
Functional and cosmetic finishes applied in-house or through vetted partners.
Type II protective anodize, natural silver finish.
Type III hard coat, wear-resistant black.
Blue, red, gold, green dye for audio and 3C.
Uniform matte texture, hides machining marks.
Durable corrosion-resistant RAL colors.
Removes free iron, boosts stainless corrosion.
Zinc, nickel, chrome, tin for connectors.
Permanent non-contact logos and serials.
U-channel clamp-on aluminum heat sinks with semicircular base for pipes and cylindrical housings, black anodized, CNC cut and drilled to your fixture.
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Custom CNC aluminum heat sinks with milled fins and integrated mounting holes - 6063/6061, anodized, +/-0.005 mm, prototype to volume.
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Custom sunflower pin-fin round aluminum heat sinks for COB LED and high-power lighting - radial fins, central bore, gold anodized, drilled mounting holes.
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Custom stacked-fin round aluminum heat sinks for high-power LED downlights, street lights and COB modules - dense radial fins, CNC center bore, natural finish.
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High-efficiency VMCs for prototype, mid-volume and large-batch metal parts production.
Integrated drilling, tapping and milling shortens lead time for aluminum enclosures.
Combined drilling-milling lines support both small batches and volume OEM orders.
Well-organized production zones support everything from one-off parts to mass programs.
Systematic line layout raises machining efficiency and guarantees on-time delivery.
Complete CNC equipment set enables stable continuous running for OEM volumes.
Dongguan, China · 200+ CNC machines · In-house anodizing & laser cutting · Visitors and third-party inspections welcome.
Fully certified quality management system. Every batch ships with material certificates and inspection reports you can trust.
Our engineers review every drawing upfront — flagging tolerances, undercuts and cost drivers before a single chip is cut.
Custom foam, wooden crates and FBA-ready packaging. Door-to-door freight to 60+ countries with full tracking.
Your message lands directly with our senior engineers — instantly acknowledged.
We study your requirements and propose a workable solution with material & process options.
Detailed quotation with specs, options and lead time — no hidden fees.
Approve the sample, then we mass-produce with full QC and on-time shipping.
WhatsApp: +86 18362358467
Email: info@rejincnc.com
Your CAD files are kept strictly confidential. Quotation within 24 hours.
