| 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 |
Battery end plates and mounting brackets in an EV pack take abuse: they clamp cells, carry busbars, hold sensors and must stay flat after years of vibration and thermal cycling. That is why they are CNC-milled from solid 6061-T6 aluminum rather than stamped or bent sheet. The pockets, lightening cutouts and busbar seats come off the machine dimensional, and the plate bolts straight into the module with no fitting.
Every hole is positioned to your pack drawing: cell-tie-down holes, busbar bolt holes, dowel bores for module alignment, and through-slots for cable exit. We hold +/-0.05 mm positional accuracy on hole patterns and a flatness spec on the mounting face, because a warped plate in an automotive pack is a warranty problem, not a cosmetic one.
Finish follows function: black hard anodize on busbar-facing surfaces blocks galvanic corrosion and marks current isolation; clear anodize preserves conductivity where the plate is also a current path or thermal spreader. We run to IATF-aligned incoming, process and outgoing inspection, and support prototype-to-production ramps from sample batches to 50,000+ pieces per month under NDA.
Machined from 6061-T6 billet plate so pockets and hole seats stay dimensional under torque and thermal cycling - stamped brackets flex and warp.
Cell tie-downs, busbar holes and dowel bores are machined to your module drawing with +/-0.05 mm positional accuracy.
Black anodize for electrical isolation and corrosion, clear anodize where the plate doubles as a conductor or thermal spreader.
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-machined aluminum automotive components for EV - manifold blocks, valve bodies, motor flanges and ECU housings, +/-0.01 mm tolerance.
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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.
