Overview
XCM CNC uses rapid zinc prototyping for die-cast follow-up machining validation, with the same tolerance logic for the sample that will later be used for production. MOQ starts from 1 piece and sample lead time is usually 3-7 days.
With ISO 9001 and IATF 16949 aligned systems, precision sample work can run on equipment such as DMG and Matsuura. During drawing review, we confirm datum choice, the correction range, and any pre-finish machining requirement, then the sample stage checks thin-wall fixturing, fit-surface accuracy, and coating allowance before the project moves into a pilot decision.
Key Capabilities
Machining Parameters
- Materials: Zamak 3, Zamak 5, Zamak 8 by drawing review
- Tolerance: +/-0.003 mm (+/-0.00012 inch), IT5 or IT6 accuracy, +/-0.01 mm shaft and bore fits, with h6 and H7 available
- Surface Finish: Ra 3.2 um milled, Ra 1.6 um precision, Ra 0.8 um turned or bored
- GD&T: Coaxiality 0.012 mm, runout 0.01 mm, cylindricity 0.011 mm
- Max Size: Milling 3000 x 1600 x 1400 mm, turning diameter 1250 x 2000 mm
- Surface Treatment: Plating, powder coating, chromate finish, painting, or cosmetic prep by drawing review
- Thread: M1.4-M220, NPT, BSP, G, PT
- Prototype: MOQ 1 piece, sample lead time 3-7 days, and the same tolerance logic used for production
Prototype Lead Time with Production-Grade Tolerance
Zinc prototypes start from MOQ 1 piece with a 3-7 day sample route, using the same +/-0.003 mm precision tolerance and H7 bore accuracy planned for production. The fixture route, toolpath, and measurement datum are kept aligned to later production so the sample does not pass on a temporary process that would later change.
Fit Verification on Prototype Mating Surfaces
Zinc prototype mating surfaces can be machined to Ra 1.6 um precision faces and Ra 0.8 um turned bores for actual fit testing before a pilot build starts. H7 bores, h6 shaft positions, 0.02 mm flatness, and thread gauge results can all be checked at the sample stage so assembly issues show up before production release.
Revision Iteration with Datum Revalidation
Zinc revision loops can recheck 0.012 mm coaxiality and 0.01 mm hole position against the updated drawing before the next sample is cut. When walls, fit features, or datums change, the stock allowance, fixture route, and reinspection list are updated together and tied to the revision record.
Prototype Inspection That Bridges to Pilot Production
Zinc prototype inspection data, including CMM results, roughness readings, and fit-test feedback, can feed directly into the pilot process sheet. The sample stage can also verify how plating thickness changes fit size so the pilot run does not discover those issues too late.
Specifications
| Product Name | Cost-Effective Zinc CNC Prototype Machining |
|---|---|
| Manufacturer | XCM CNC |
| Factory Location | Shenzhen, Guangdong, China |
| Quality System | ISO 9001, ISO 13485, IATF 16949, GJB9001C |
| Machining Process | CNC prototype machining |
| Material | Zinc |
| Material Grade | Zamak 3, Zamak 5, Zamak 8 by drawing review |
| Tolerance | +/-0.03 mm standard CNC machining tolerance |
| Precision Tolerance | +/-0.003 mm for selected critical features by drawing review |
| Surface Roughness | Ra 3.2 um milled, Ra 1.6 um precision, Ra 0.8 um turned or bored |
| Surface Treatment | Plating, powder coating, chromate finish, painting, or cosmetic prep by drawing review |
| Max Part Size | Milling 3000 x 1600 x 1400 mm / Turning diameter 1250 x 2000 mm |
| Inspection | CMM, roundness tester, height gauge, roughness tester, thread gauges |
| Application | Prototype die-cast revisions, fit-check lock components, and pilot-build shell details |
| Typical Application | Prototype and pilot-run zinc machining |
| Key Features | Die-cast follow-up machining, rapid sample validation, revision-ready datum checks, and low-volume fit tests |
| Critical QC Requirements | Casting datum review, fit-surface inspection, deformation control, finish allowance check, and post-process reinspection |
| Batch Range | MOQ 1 piece prototype to pilot build |
| MOQ | 1 piece |
| Typical Lead Time | Prototype samples 3-7 days by drawing review |
| Drawing Formats | STEP, IGS, DWG, PDF, X_T |
| Secondary Process | Deburring, tapping, cosmetic-prep machining, plating prep, and dimensional reinspection |
| Material Certificate | Material certificate by order requirements |
| Material Feature | Die-cast follow-up machining, fit-surface correction, and pre-finish machining review |
| Assembly Features | Die-cast mating faces, threaded inserts, locking features, and EMI cover interfaces by drawing review |
Applications
Prototype Fit Surfaces and Mounting Holes
Typical Parts: Interior knob base, non-structural door-latch actuator housing, sensor mounting bracket
Automotive zinc prototypes often need real assembly testing on fit holes and mounting faces during the sample stage. Fit bores can be machined to H7 class, mounting faces can be held to 0.02 mm flatness, and the first article can be checked on the CMM before the trial assembly is released. The accepted fixture route then moves directly into the pilot process sheet.
Lock-Hardware Samples and Knob Seats
Typical Parts: Lock core housing, handle base, knob seat
On lock-hardware prototypes, the main validation point is how bore roundness and roughness affect insertion and rotation. Lock bores can be finished to 0.006 mm roundness and Ra 0.8 um, and visible faces can be checked before plating so appearance issues do not show up only after the finish trial.
Shielding Shell Prototypes and Clip Frames
Typical Parts: EMI shielding can, connector housing, non-load-bearing heat-sink bracket
Thin-wall shielding-shell prototypes are mainly used to validate fixture distortion and clip-hole position before a pilot lot begins. On walls near 0.5 mm, the sample confirms clamp force and feed rate, while clip-hole position can be held to 0.01 mm and conductive faces can also be tested before the next revision loop starts.
Model Prototypes and Decorative Clip Parts
Typical Parts: Model decorative part, clip accessory, small housing
Decorative prototype parts mainly validate visible-face consistency and clip-fit tightness before small-batch release. Visible faces can be milled to Ra 1.6 um with the expected tool-mark direction, slot width can follow the drawing, and a new revision can be turned quickly when the design changes after the first sample.
Why Choose Us
Qualified Systems and Equipment Coverage
XCM CNC runs zinc die-cast secondary machining under ISO 9001, ISO 13485, IATF 16949, and GJB9001C aligned quality systems, while using equipment from brands such as DMG, Mazak, Matsuura, and Brother for fit-surface correction and multi-face machining. For Zamak series projects, we review datum choice, pre-finish allowance, and reinspection priorities during drawing review.
Broad Size Range for Zinc Finish Machining
We support zinc finish machining from small connector-scale parts to larger housings, covers, and medium-size structural parts. Three-axis travel reaches 3000 x 1600 x 1400 mm and turning capacity reaches diameter 1250 x 2000 mm, while the final route still follows the die-cast datum, the pre-finish allowance, and the fixture method.
Tiered Equipment Strategy for Cost and Quality
XCM CNC uses CNC equipment from mainland China, Taiwan, Japan, and Europe or the US in a tiered production mix. Lower-tolerance operations can run on domestic or Taiwan machines, while higher-precision critical work moves to imported machines such as DMG and Mazak. That helps reduce cost without placing simple operations onto high-hour machines.
Fast Sample Turnaround and Revision Support
Zinc samples can often move on a 3-7 day pace from MOQ 1 piece while still following production-grade tolerance logic. If fit faces, holes, or visible surfaces need to change, the next revision can be prepared after reviewing the datum and allowance plan instead of waiting for a full batch schedule. NDA support is available before review starts when drawings are sensitive.
Sample Data That Carries into Production
The fixture plan, cutting parameters, inspection items, and surface-treatment trial result validated on the sample can be written into the process sheet so the pilot lot does not need to rediscover the same conditions. Revision IDs, measurement data, and critical datums stay linked to each sample loop for later repeat work.
FAQ
What is the lead time and MOQ for a zinc die-cast prototype?
MOQ starts from 1 piece and prototype lead time is often 3-7 days depending on geometry complexity and the condition of the incoming die-cast part. The prototype uses the same general tolerance, fixturing logic, and inspection route planned for later production.
Will the zinc prototype use the same tolerance and process as production parts?
Yes. The sample can follow the same tolerance standard, roughness targets, and inspection method used for later production. Once the fixture route and toolpath are approved during sampling, those settings can move directly into the production process sheet.
Can you do a surface treatment trial on the zinc prototype before batch production?
Yes. A prototype can include plating, chromate finish, or painting trials to verify how coating thickness changes fit size and appearance. Precision-bore allowance can be measured on the sample so the batch route uses a finish plan that has already been checked.
How do you handle design revisions during the zinc prototyping phase?
Each revision first checks whether the datum choice, correction allowance, and fit features have changed before the next sample is cut. When the revision affects holes, fit faces, or wall thickness, the fixture route and CMM inspection list are updated together and tied to the revision ID.
What should be confirmed before starting a one-piece zinc prototype?
A one-piece zinc sample usually needs the revision ID, the alloy grade, the incoming die-cast condition, and the critical dimensions confirmed before machining starts. If the part also includes visible faces, surface treatment, or assembly holes, those reinspection priorities should be fixed at the same time.
How do you move from zinc prototypes to pilot runs?
Once the sample confirms the datum choice, correction allowance, surface-treatment route, and reinspection method, those results are written into the drawing and process sheet before the pilot lot starts. Batch lead time is then reviewed in the normal 10-15 day range unless the finish route adds extra process time.
Request a CNC Machining Quote from XCM CNC
Send us your drawings. Our team will review the file and reply with a machining quote. MOQ: 1 piece, with competitive low-cost pricing.
Email: [email protected] | WhatsApp: +8618638951317
