CNC milling
For drawing-based components requiring machined faces, pockets, holes, threads and project-specific geometry.
Drawing-based sourcing and RFQ coordination
CNC Machining China for Custom Parts and Drawing-Based RFQs
Send your drawing and project requirements for supplier review, quotation coordination, inspection follow-up, packaging and export delivery support.
Email PDF, STEP, STP, DWG, DXF, IGS, IGES or another agreed CAD format after submitting the initial RFQ.
Drawing-based projectsPrototype and low-volume supportInspection coordinationExport packaging follow-up
CNC machining processes
Match the process to the drawingânot the other way around
Manufacturing feasibility is reviewed against part geometry, material, quantity, tolerance, finish, inspection method and supplier fit.
CNC turning
For suitable cylindrical components, shafts, sleeves, threaded features and rotational geometry.
Combined processes
Milling and turning may be combined when the geometry and selected manufacturing route require both.
Multi-side machining
3-axis machining and rotary-fixture or multi-side setups can be reviewed. 4-axis or 5-axis capability is stated only when verified for the project.
Materials
Commonly supported, subject to review
- Aluminum
- Stainless steel and carbon steel
- Brass and copper
- Engineering plastics
- Other materials after technical review
Tolerance and engineering review
Critical dimensions are evaluated individually
For suitable parts and critical dimensions, machining tolerances as tight as ±0.003 mm may be evaluated after drawing review.
Achievable tolerance depends on material, geometry, part size, critical dimensions, quantity, machining process, surface treatment, inspection method and assembly requirements.
Thermal-management components
Custom Heat Sinks and Finned Thermal Components
Overall size, fin geometry and channel structure can be customized from buyer drawings. Material, finish, tolerance and thermal requirements are confirmed during engineering review.
Selected custom manufacturing examples
Visible examplesânot fixed standard models or complete case studies
Each project is reviewed from its drawing and requirements. No material, finish, tolerance, quantity or customer application is assigned from appearance alone.
Drawing-based components
Project-specific visible geometry
Curved, threaded, recessed, stepped and slotted features can be reviewed against the buyer's drawing.
Submit: drawing/model, material, quantity, critical dimensions, finish and inspection requirements.
Component options
Long cylindrical and multi-feature parts
Material, surface condition and process are confirmed from the project documentation, not the visible color of a sample.
Submit: 2D/3D files, datum and tolerance priorities, assembly relationship and expected order scope.
Manufacturing and packaging
Protected handling for custom components
Packaging method, surface protection, labels and export requirements are coordinated according to the confirmed product and delivery plan.
Submit: packaging sensitivity, labeling requirements, destination and delivery schedule.
Prototype and production
Scale after requirements are clear
- Prototype verification
- Low-volume manufacturing
- Batch-production coordination
- Repeat-production coordination
Production stage is confirmed from the project scope; it is not inferred from the number of parts shown in a photo.
Surface finishing
Options subject to material review
- Natural, black or red anodizing
- Powder coating and electrophoresis
- Polishing and bead blasting
- Painting and laser marking
No visible sample on this page is assigned a specific finish unless separately verified.
Inspection coordination
Define evidence before production
- Drawing and tolerance review
- First-article inspection where agreed
- Caliper and micrometer inspection
- Certificates and reports where required
- Third-party inspection coordination
CMM capability and inspection results are not claimed without project evidence.
What buyers should send before quotation
CNC RFQ checklist
Send the drawing and commercial requirements together so feasibility, quotation scope and schedule can be reviewed for the actual project.
- 2D / 3D drawingsDimensioned PDF or DWG plus STEP or another agreed CAD file where available
- MaterialGrade or material family, including any certificate requirement
- QuantityPrototype, initial batch and expected repeat demand if known
- ToleranceCritical dimensions, datum references and inspection points
- Surface finishFinish type, color, texture, marking and protected surfaces
- ApplicationPart function, assembly relationship and operating conditions
- Delivery scheduleRequired sample or production date
- Destination country or portNeeded for packaging, delivery and export planning
RFQ and drawing workflow
From first requirement to export delivery
Confidential drawings should be sent by email after the initial RFQ. WhatsApp is not the primary channel for engineering files.
- 1Send project requirements
- 2Email the drawing or 3D model
- 3Engineering and manufacturability review
- 4Confirm material, tolerance, quantity and finish
- 5Receive quotation
- 6Prototype or production
- 7Inspection
- 8Packaging and delivery
Buyer FAQ
Common CNC quote questions
Capabilities, schedules and documentation are confirmed according to the drawing and selected supplier.
What should I send for a CNC machining quote from China?
Send 2D or 3D drawings, material, quantity, required tolerance, surface finish, application, delivery schedule, and destination country or port. Email engineering files to sally@sinosupplyworks.com after submitting the RFQ.
Can you quote from STEP, PDF or DWG drawings?
STEP, STP, PDF, DWG, DXF, IGS, IGES and other agreed CAD formats can be reviewed. A 3D model plus a dimensioned 2D drawing is useful when tolerances, threads, finishes or inspection points must be defined.
What affects CNC machining cost?
Material, part geometry, dimensions, tolerance, surface finish, quantity, tooling or fixture needs, inspection scope, packaging and delivery schedule can all affect cost. Pricing is confirmed case by case after drawing and supplier review.
Can small batches or prototypes be coordinated?
Yes. Suitable prototype and small-batch projects can be coordinated. Supplier capability, minimum order quantity, lead time, inspection scope and price are confirmed for the specific drawing and order quantity.
Is Sino Supply Works a factory?
No. Sino Supply Works helps overseas buyers coordinate China sourcing and RFQ communication. Supplier capability, pricing, certificates and delivery terms are confirmed case by case.