3-Axis CNC Milling

Tolerance ±0.01–0.02 mm, Ra 0.8–1.6 µm, 3–5 day lead time. Ideal for flat or prismatic housings, mounting plates and simple mold inserts where tool access is vertical.

4/5-Axis Simultaneous Machining

Tolerance ±0.005 mm, Ra 0.4–0.8 µm, 5–7 days. Handles complex contours, undercuts and angled features in automotive sensor housings and multi-cavity mold cores without refixturing.

CNC Turning for Cylindrical Prototypes

Tolerance ±0.005 mm, Ra 0.4 µm, 2–4 days. Best for pins, shafts, bushings and connector barrels requiring concentric diameters and tight runout.

Wire EDM for Ultra-Thin Walls

Tolerance ±0.002 mm (Sodick/Seibu slow-wire), Ra 0.2–0.4 µm, 4–6 days. Cuts hardened steel micro-connector terminal tooling, thin-wall inserts and slit features below 0.1 mm without mechanical stress.

Micro-Machining

Tolerance ±0.001 mm, Ra 0.1 µm (mirror-grade EDM), 5–8 days. Produces sub-millimeter pins, micro-slots and conformal cooling channels for 5G board-to-board and FPC connector molds.

Aluminum Alloys (6061, 7075)

6061-T6 and 7075-T6 dominate rapid prototyping for their machinability and weight-to-strength ratio. Typical tolerance on XUXIANG Fanuc-class CNC reaches +/-0.005 mm, with cycle times 30–40% faster than steel. Common in enclosures, heat sinks and ADAS sensor housings.

Stainless Steels (304, 316)

304 and 316L offer corrosion resistance for medical, food-contact and marine prototypes. Slower feed rates yield +/-0.01 mm tolerance; tool wear is higher. Typical in surgical instruments, valve bodies and outdoor sensor housings.

Tool Steels (H13, NAK80)

H13 and NAK80 pre-hardened grades prototype mold cores and inserts. XUXIANG holds +/-0.002 mm on slow-wire EDM for these alloys. Used in injection-mold validation, connector tooling and high-cycle test fixtures.

Titanium (Ti-6Al-4V)

Grade 5 titanium serves aerospace and biomedical prototypes requiring biocompatibility and high strength-to-weight. Machining cost is 3–4× aluminum; tolerance typically +/-0.01 mm. Applications include implant prototypes and drone structural parts.

Engineering Plastics (PEEK, POM)

PEEK and POM (Delrin) enable functional testing under thermal and chemical stress. CNC tolerance reaches +/-0.02 mm; material cost is moderate. Common in insulator prototypes, wear pads and medical device housings.

Copper Alloys (C101, Brass)

Oxygen-free copper (C101) and brass deliver electrical and thermal conductivity for connector pins, heat exchangers and RF shields. Tolerance typically +/-0.01 mm; machinability is excellent but material is costly.

Surface Finishing

Bead blasting produces uniform matte textures (Ra 0.8–1.6 µm) for visual prototypes, adding 1–2 days and ~8–12% cost. Mirror polishing to Ra 0.1 µm replicates injection-molded surface quality, critical for optical housings and connector tooling; expect +3–4 days and 15–20% premium.

XUXIANG’s Nikon toolmaker’s microscopes (V-12B / MM-400 class) verify surface integrity to ensure prototype fidelity matches production intent.

Anodizing and Plating

Type II anodize (10–25 µm) offers corrosion resistance for aluminum prototypes; Type III hardcoat (50+ µm) adds wear protection for functional testing. Lead time: +5–7 days, cost +20–30%.

Gold and nickel plating on micro-connector prototypes ensure signal integrity and insertion-cycle validation; electroless nickel (3–5 µm) is standard for 5G terminal tooling.

Heat Treatment

Stress-relief annealing stabilizes tool-steel prototypes after high-speed machining, preventing dimensional drift during testing. Hardening to HRC 50–58 validates durability for production-intent inserts; adds 4–6 days and 10–15% cost depending on part geometry and batch size.

Laser Marking and Assembly

Permanent laser engraving (part numbers, QR codes) enables traceability across multi-revision prototype cycles, adding <1 day and minimal cost. Press-fit threaded inserts and adhesive bonding let buyers test assembly sequences before committing to production tooling, typically +2–3 days per operation.

In-Process Inspection and First-Article Checks

Tool offsets are monitored after every setup and periodically during long runs to catch drift before tolerance windows are breached. First-article inspection verifies that the initial part meets all critical dimensions, confirming machine programs and fixturing before batch continuation.

CMM and Optical Measurement

ZEISS MICURA CMM systems measure positional tolerance, flatness and GD&T callouts to 0.7 µm resolution, validating features that calipers cannot reach. Nikon toolmaker’s microscopes (V-12B / MM-400 class) verify edge radii, surface finish and micro-geometry critical to connector and mold-insert applications.

Material Traceability and Certifications

Mill certificates trace alloy chemistry and heat-lot provenance, essential when prototypes advance to qualification testing. RoHS and REACH compliance documentation accompanies parts destined for electronics or automotive programs, avoiding re-sourcing delays at the production phase.

Documentation Packages

Inspection reports include dimension tables, CMM coordinate data and 3D scan overlays that compare as-machined geometry to CAD. First Article Inspection (FAI) packages provide auditable evidence for design reviews and tooling approval meetings.

Machine-Park Capabilities and Work Envelope

Ask for 5-axis machine counts, spindle speeds (≥20,000 RPM for micro-features) and work envelope dimensions. XUXIANG operates Sodick and Charmilles EDM, Beijing Jingdiao high-precision CNC and Fanuc-class assets — over CNY 8 million in Japanese, Swiss and German equipment capable of holding +/-0.002 mm on slow-wire and corner radii ≤ R 0.015 mm.

Tolerance and Surface-Finish Guarantees

Request process-capability studies (Cpk ≥ 1.33) and documented surface-finish ranges. XUXIANG guarantees +/-0.001 mm maximum machining accuracy and mirror-grade EDM finishes to Ra 0.1um, validated by a ZEISS MICURA CMM measuring to 0.7um and Nikon toolmaker’s microscopes.

Turnaround Time and Expedite Options

Clarify standard lead times and 24/48/72-hour expedite tiers. XUXIANG delivers roughly 30% faster than industry average, supported by dual-factory capacity and a 2025 Quanzhou expansion adding ~1,400 m² and targeting 200% output increase.

Engineering Support and DFM Feedback

Confirm access to DFM analysis and material-substitution advice before production. XUXIANG assigns 10+ engineering experts to every project, providing detailed DFM feedback and alternative-material recommendations to optimize cost and manufacturability.

Quality Certifications

Verify ISO 9001:2015 as baseline; AS9100 for aerospace, IATF 16949 for automotive. XUXIANG operates under ISO 9001:2015 governance with five-step QC — material spectral analysis, in-process monitoring, CMM verification, surface checks and FAI documentation with material certificates.

Communication and IP Protection

Ensure NDAs, secure file transfer and English-speaking project managers. XUXIANG provides transparent communication protocols, confidential data handling and responsive PM support to safeguard intellectual property and accelerate iteration cycles.

Over-Tolerancing Non-Critical Features

Specifying +/-0.005 mm on every dimension when only mating surfaces require that precision multiplies machining time and tool wear. XUXIANG engineers see prototype RFQs with blanket tight tolerances that add 40–60% to cycle cost.

Remedy: apply +/-0.001 mm tolerances only where fit, function or sealing demands it; default non-critical features to +/-0.05 mm or ISO 2768-m.

Ignoring Material Lead Time for Exotics

Titanium Ti-6Al-4V, PEEK and Inconel 718 often require 2–3 weeks’ stock procurement, yet buyers assume immediate availability. This single oversight accounts for half of all prototype schedule slips.

Remedy: confirm material stock or accept alternate alloys (e.g., 7075-T6 aluminum) during the RFQ phase to preserve your launch window.

Skipping Design-for-Manufacturability Review

Un-machinable geometries — internal undercuts, tool-access conflicts or radii below R 0.015 mm — surface only after order placement, forcing redesign loops. XUXIANG’s 10+ engineering experts flag these issues in pre-production DFM feedback.

Remedy: request DFM analysis before PO; one 48-hour review prevents weeks of rework and preserves first-article timelines.

Choosing Price Over Capability

Low-bid shops lacking ZEISS CMM validation or mirror-grade EDM deliver out-of-spec prototypes that fail fit checks, delaying product launch by 4–6 weeks for re-sourcing.

Remedy: qualify capability first — verify CMM resolution (XUXIANG: 0.7 µm ZEISS MICURA), machining accuracy (+/-0.001 mm) and ISO 9001:2015 certification before comparing price.

Failing to Validate Inspection Methods Upfront

Assuming caliper checks suffice for +/-0.01 mm tolerances leads to acceptance disputes; only CMM or toolmaker’s microscope (Nikon V-12B class) delivers traceable verification.

Remedy: specify inspection equipment and request FAI documentation with material certificates in your RFQ to ensure metrology alignment from day one.

CAD Finalization and Tolerance Stack-Up Analysis

Export STEP or Parasolid files with GD&T annotations; verify that critical dimensions carry +/-0.01 mm or tighter call-outs. Run internal stack-up analysis to confirm assembly clearances before sharing files.

RFQ Submission with 3D Models and Material Specs

Include native CAD, 2D drawings, material grade (e.g., NAK80, Ti-6Al-4V) and surface-finish targets (Ra ≤ 0.4 μm). XUXIANG typically returns quotes within 24 hours when files are complete.

DFM Collaboration and Quote Review

Review DFM feedback on tool-access zones, electrode strategy and fixture points. Approve revised geometry and lock cost before PO; this gate prevents mid-run scope changes.

Prototype Production with Milestone Updates

First-article inspection (FAI) occurs at ~60% of schedule; buyers receive CMM reports and in-process photos. Approve or request adjustments before final machining.

Final Inspection, Packaging, and Shipment

ZEISS CMM validates every critical dimension; parts ship with material certificates, FAI reports and inspection photos. Typical prototype lead time is 7–10 days post-approval.