| 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 |
U-channel clamp-on heat sinks solve a specific problem: cooling devices that mount onto a round pipe, tube or cylindrical housing. Instead of a flat base, the sink has a semicircular arch that wraps against the round surface, transferring heat directly from the housing wall while tall fins above the channel reject it to the surrounding air.
This geometry is widely used for pipe-mount LED grow lights, tube retrofits, cylindrical driver enclosures, pole-mounted sensors and any fixture where the device sits on or clamps to a round tube. The flat mounting ears with drilled holes bolt the sink to standard pipe clamps or brackets, and the black anodized finish stands up to outdoor and greenhouse humidity.
We supply standard U-channel profiles in a range of arch diameters, or CNC-machine the arch radius, cut length and hole pattern to your tube OD and fixture drawing. The same extrusion family also yields closed finned enclosure boxes for driver and supply housings. Samples ship quickly; production runs scale to 50,000+ per month under NDA.
The semicircular arch matches your tube OD so the sink clamps tightly against the cylindrical housing, keeping contact resistance low.
Fins above the arch maximize exposed surface area for natural convection in the airflow around the pipe.
Flat tabs with clearance holes bolt to standard pipe clamps or brackets - no on-site drilling or fabrication.
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.
Custom black anodized aluminum heat sinks with dense fins, flat base and drilled mounting holes for power supplies, amplifiers and PCB electronics.
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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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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 extruded aluminum heat sinks - 6063 profiles cut to size with CNC holes, anodizing and adhesive backing. From tiny MOSFET sinks to inverter coolers, prototype to volume.
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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.
