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Custom injection molding for plastic enclosures integrated with PCBA and box build
Precision Mechanical Solutions

Turnkey Electronics Solution - CNC Machining

Machined parts that match your acceptance criteria, with revision control and record options you can audit.

  • Build-ready mechanical parts for PCBA integration, box build, and product assembly
  • Revision lock and change control for drawings, finishes, and critical dimensions
  • Inspection and documentation options: first article, dimensional checks, lot labeling
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Buyer concerns and the controls we deliver

Next: see the typical parts and build scenarios we support.

Buyer Concern

Revision mismatch between CAD, drawing, and finishing notes

Controls

Revision lock before build, controlled change log (ECO style), updated traveler and drawing stamp option

Buyer Concern

Fit issues during PCBA integration and final assembly

Controls

Fit check plan based on mating parts, critical dimensions list, assembly reference photos option

Buyer Concern

Cosmetic expectations unclear for visible surfaces

Controls

Acceptance criteria alignment for finish, edges, and marks, sample sign-off option before repeat builds

Buyer Concern

Tolerance stack-up causes field failures

Controls

GD&T and datum review notes option, critical-to-function dimension confirmation checklist

Buyer Concern

Inspection evidence needed for internal approval or returns

Controls

Dimensional report option, first article inspection option, lot labeling and traceability options

What we machine, and how it is used in your projects

Next: pick a program goal so deliverables match your stage.

01. Brackets and mounting plates

Typical parts: motor mounts, controller brackets, sensor plates

Inputs: 2D drawing with tolerances, material, quantity

Deliverables: machined parts, finish per spec, lot labeling option

02. Enclosures and covers

Typical parts: small housings, lids, protective covers

Inputs: CAD plus cosmetic acceptance notes

Deliverables: fit-ready parts, edge and surface handling per acceptance checklist

03. Heat sinks and thermal interfaces

Typical parts: heat spreaders, heat sink plates, contact surfaces

Inputs: flatness and surface requirements, mating surface details

Deliverables: controlled contact surface, inspection points list option

04. Fixtures and jigs for assembly

Typical parts: soldering fixtures, press-fit guides, test holders

Inputs: board outline or enclosure mating points

Deliverables: fixture build, revision ID marking option

05. Inserts, threads, and fastener features

Typical parts: threaded holes, standoffs, inserts seats

Inputs: thread spec, torque notes, assembly method

Deliverables: threaded features per spec, assembly notes alignment

06. Small turned parts

Typical parts: shafts, spacers, bushings

Inputs: OD ID length tolerances, material

Deliverables: turned parts, dimensional check option

07. Mixed mechanical kits for box build

Typical parts: bracket set, hardware kit, labeled sub-assemblies

Inputs: BOM for mechanical kit, packaging rules

Deliverables: kitted set, packout record option

08. Prototype to pilot support

Typical parts: low-volume mechanical variants during iteration

Inputs: revision plan, change approval rules

Deliverables: controlled revisions, build notes and change log option

09. Secondary 3D printing

Typical parts: quick fit models, ergonomic mockups, temporary jigs

Inputs: CAD, target purpose, surface expectation

Deliverables: printed parts for fit and handling checks, iteration notes option

Choose a program goal, get matched deliverables

Next: review the 5-step timeline and what you receive at each step.

Goal 1

Fast fit check

Deliverables:

  • Printed or quick-turn prototype option
  • Fit checklist
  • Photo record option for mating areas
Select This Goal →
Goal 2

Pilot build readiness

Deliverables:

  • First article inspection option
  • Critical dimensions list
  • Controlled finish notes and acceptance alignment
Select This Goal →
Goal 3

Stable repeat production

Deliverables:

  • Revision lock
  • Change control log option
  • Lot labeling and inspection record options
Select This Goal →

5-step process with clear deliverables

Next: see what quality evidence and records we can provide.

01

File intake and alignment

Deliverable

Drawing and CAD revision lock, acceptance criteria checklist

02

DFM and risk review

Deliverable

Machining risk notes, critical dimensions confirmation list, questions log

03

Prototype and fit verification

Deliverable

Fit check plan using your mating parts, iteration notes option, 3D printing support if needed

04

Production build

Deliverable

Controlled build traveler option, part marking and packaging rules alignment

05

Inspection and release

Deliverable

Dimensional check option, first article option, shipment record option

Quality evidence options you can request

Next: reduce handoffs by integrating machining with PCBA and box build.

Records you can request

First article inspection option for critical dimensions
Dimensional check report option aligned to your drawing callouts
Revision history and change log export option
Lot labeling and traceability options for parts and kits
Incoming QC tie-in options when machining is part of turnkey assembly
Packing list and kitting record option for box build programs

Certifications

IATF 16949
ISO 9001
ISO 13485
UL

Records Available

Inspection reports, dimensional checks, and traceability documentation available upon request to support your quality system.

Integrate CNC machining with PCBA and box build to reduce handoffs

When machining is planned alongside PCBA and final assembly, you get fewer handoffs and clearer acceptance alignment. We can lock revisions across the mechanical kit, PCB build files, and assembly instructions, then deliver a single packout that matches your release criteria.

1

Faster fit resolution

Because board and mechanical constraints are reviewed together

2

Cleaner change control

Because ECO decisions apply across electrical and mechanical items

3

Better traceability

Because part labels can map to assembly and test records

Wire harness integration during final box build assembly

What to send for a fast quote and engineering review

Send these files

2D drawing in PDF with tolerances, GD&T if used, datum references
3D CAD (STEP preferred) and revision ID
Material and finish requirements, plus cosmetic acceptance notes for visible surfaces
Quantity and schedule: prototype, pilot, monthly volume if known
Mating part references: PCBA outline, connectors, enclosure interfaces, mounting hole locations
Critical dimensions list if you already know CTQ items
Inspection needs: first article request, dimensional report request, traceability level
Packaging requirements and kitting rules if parts ship as a set

Request a machining review and quote

Send your files and requirements. We will return DFM notes, key risks, and a practical next step plan.

Get a fast quote

Response includes a questions log and aligned deliverables list.

Response within 24 hours
Includes DFM risk assessment
No obligation quote
FAQ

CNC Machining FAQs

Q

What file formats do you accept?

We typically work from 2D drawings for tolerance callouts and a 3D CAD for geometry review. Include a clear revision ID so we can lock scope before build.

Q

How do you handle drawing changes after a quote?

We lock the revision used for quoting and production. Changes follow a documented approval path and we can provide an updated change log option with the new acceptance checklist.

Q

Can you support parts that must mate with a PCBA?

Yes. Share the PCBA outline, connector locations, and any keep-out zones. We align acceptance criteria for fit points and can run a fit verification step before production release.

Q

Do you provide first article inspection?

First article and dimensional check records are available as options. Tell us which dimensions are critical so the report matches your internal approval needs.

Q

What about surface finish expectations?

Provide finish type and cosmetic acceptance rules for visible surfaces. We align acceptance criteria upfront and can support sample sign-off options for repeat production.

Q

When should we use 3D printing vs CNC machining?

3D printing is useful for quick fit checks, ergonomic evaluations, and temporary jigs during iteration. CNC machining is used when tolerance, strength, finish, or production intent matters.

Q

Can you ship as a labeled mechanical kit?

Yes. Share your kitting BOM and packout rules. Lot labeling and packing records are available as options.

Q

Can machining be included in a full turnkey program?

Yes. We can integrate machining with PCB fabrication, sourcing, PCBA, testing, and box build so revisions and acceptance criteria are aligned across the whole release package.

DFM tips that reduce iteration cycles

Define datums for mating features

Why: controls stack-up during assembly

Provide: datum scheme and CTQ dimension list

Specify thread requirements clearly

Why: avoids assembly delays and fastener mismatch

Provide: thread spec, insert rules, torque notes if critical

Separate cosmetic zones from non-cosmetic zones

Why: faster acceptance alignment

Provide: marked drawing zones and photo examples if available

Call out flatness where thermal contact matters

Why: improves thermal transfer reliability

Provide: contact surface requirements and mating material

Plan for cable and connector clearances early

Why: avoids late fit conflicts in box build

Provide: connector keep-out, bend radius constraints, harness routing notes

Include edge and burr handling notes

Why: protects cables, seals, and operators

Provide: edge break requirements and any safety constraints

Use 3D printing to validate fit before tight tolerances

Why: reduces CNC iteration cost

Provide: fit targets and which areas must be verified

Lock revision rules before pilot

Why: keeps procurement, machining, and assembly aligned

Provide: change approval owner and release criteria checklist

Get In Touch

Start Your Projects Manufacturing Today!

Whether you need a quick quote or technical consultation, we're here to help.

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Business Hours: Mon-Fri 9:00-18:00 (GMT+8)

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bill [at] acepcba.com
Room 6D, No.1 Haifu, Haitian Road, Bao'an District, Shenzhen, Guangdong Province, China

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