| 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 |
Two-tone enclosures sell on contrast — but contrast only works when the color boundary is crisp. Our two-tone program machined, masks and paints in one plant, so the black stays black and the white stays white, unit after unit.
What we build: two-tone speaker and amplifier enclosures; mixer tops with painted accent bands; desktop audio shells with white accents on black anodize; grilles and trim rings to match — full sets, assembly-ready.
The boundary is engineering: paint masks are cut from the same CAD datum as the machining, so accent bands land exactly on machined steps — no hand-aligned tape lines drifting 0.5mm down the production run. Paint is oven-cured and cross-hatch tested; anodize base is ΔE-controlled per batch.
Contrast with durability: high-gloss paint over anodized aluminum resists chips when edges are chamfered first; we recommend where gloss and matte meet so your product looks new after a year on a shelf edge.
Program volumes: 500-piece premium runs to 180k/year sets; first articles ship with both finishes documented so your marketing photos match production reality.
Accent lines land on machined steps exactly — no drifting tape-mask boundaries.
Chamfered edges + oven-cured paint + cross-hatch tests: two-tone that survives shelf life.
Anodize and paint sequenced in-house — one accountable supplier for the look.
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 turned aluminum knobs produced on precision lathes. We manufacture control knobs with CD texture, anodized finishes and custom bores for audio equipment, home appliances and industrial instruments.
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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 13790500374
Email: info@rejincnc.com
Your CAD files are kept strictly confidential. Quotation within 24 hours.