| 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 |
Coffee machine parts fail in two places: the seal face that must not leak under pressure, and the surface that users touch every day. Our CNC machining program is built around those two realities.
What we machine for coffee equipment: espresso boiler caps and group-head components in stainless steel; pump manifolds and connector fittings; grinder burr carriers and dosing rings in aluminum; heating-element housings, knobs, portafilter accessories and internal brackets. Commercial 9–20 bar machines and household capsule systems both run through the same process discipline.
Where precision pays off: steam-valley seats and group heads are sealed on machined faces — we hold flatness and roughness targets that keep gaskets working through thousands of thermal cycles. Boiler fittings are pressure-critical: every thread and sealing cone is gauged, and food-contact surfaces stay free of cutting-fluid residue thanks to our aqueous washing line.
Materials chosen for hot, wet environments: 304/316L stainless for anything touching water or steam; 6061/6063 aluminum with food-safe clear anodize for structural housings; PEEK and PTFE for insulating or low-friction parts on request.
Production at OEM scale: we currently machine over 500,000 coffee-related parts a year for European and North American brands — from a few prototype group heads to annual boiler-cap programs in the tens of thousands, with documents (material certs, dimension reports, food-contact declarations) that pass EU and US market surveillance.
Flatness and roughness on every sealing face are controlled and inspected — the two parameters that decide whether a 15-bar boiler gasket survives its warranty period.
304/316L wetted parts, food-grade clear anodize, aqueous washing — with food-contact declarations available for EU/US compliance files.
500k+ parts/year flow through SPC-monitored processes. Your reorder in month 18 matches the sample you approved in week 1.
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 stainless steel shaft clamping collars for precision locking in automation, robotics and linear motion systems.
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<p>Custom aluminum turning components are rotary symmetric parts machined on CNC lathes to form housing shells, caps, sleeves and flanges. With bored internal cavities, precision mounting holes and milled side flats, they serve as structural enclosures for sensors, motors, optical modules and portable electronics.</p><p>At Rejin CNC, our multi-axis turning centers hold +/-0.005mm on bore diameter and depth while maintaining excellent surface finish. We combine turning with live-tool milling to produce holes, slots and wrench flats in one setup, reducing handling and improving concentricity.</p>
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Customized CNC machined aluminum components produced on multi-axis turn-mill centers. We precision machine aluminum parts with complex geometries, cooling fins, flange mounts and threaded features — from 6061-T6 and 6063-T5 extrusions, with in-house anodizing and full QC.
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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.