| 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 |
New-energy vehicles rely on a long list of precision aluminum parts that never appear on the spec sheet but must work for 15 years: hydraulic manifold blocks that route brake, coolant or oil flow; valve bodies that actuate thermal management; motor mounting flanges that hold the e-motor concentric to the gearbox; and ECU housings that protect the controller from vibration and dust. Each is CNC-machined from solid 6061 or 7075 aluminum bar, not cast, because castings leak, warp and need 100% leak testing that machined blocks avoid.
Every feature is cut to your drawing: cross-drilled oil passages, NPT/BSPP/metric thread ports, sealing-face grooves, dowel bores for module alignment, and internal mounting posts for PCB or sensor assemblies. We hold +/-0.01 mm on critical bore positions and sealing faces, and tap every port on the machine so it is gauged before it leaves the shop floor.
Finish follows function: clear anodize for conductivity or thermal spreading, black or hard anodize for corrosion and electrical isolation, or bead-blasted raw where a bonding or paint coat will follow. We run IATF-aligned incoming, in-process and outgoing inspection with CMM first-article reports, and ramp from one-off prototypes to 50,000+ serial pieces per month under NDA.
Cross-drilled manifolds and valve bodies come off the mill leak-tight without the porosity and dimensional drift castings need to be screened for.
NPT, BSPP and metric ports are tapped on the machine and gauged, so they seal first time without field thread chasing.
Clear, black or hard anodize, or bead-blasted raw - matched to whether the part conducts, insulates or carries a bonded coating.
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 CNC aluminum battery end plates and mounting brackets for EV packs - milled pockets, automotive hole patterns, black or clear anodize.
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Custom CNC turned flanges and end caps for EV motors, gearboxes and pumps - aluminum, 304 stainless or copper, +/-0.01 mm.
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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.
