Custom CNC Milling Services for Precision Metal & Plastic Parts
Factory-direct CNC milling for precision metal and plastic parts. Upload your STEP files for DFM review, tolerance evaluation, finishing recommendations and a 12–24h RFQ response.
In-House CNC Milling
Factory production workflow, not marketplace-style outsourcing.
±0.01 mm Upon Review
Available for selected critical features based on material and geometry.
CMM Inspection
Dimensional reports and first article inspection available when required.
Material Certificates
Material traceability and certificates available upon request.
12–24h RFQ Review
For most projects with complete CAD files and drawings.
| Do you accept STEP files? | Yes. STEP, STP, IGS, X_T, SLDPRT, DWG, DXF and PDF drawings are supported. A 2D drawing is recommended for tolerances, threads and surface finish requirements. |
| Can you handle tight tolerance? | Tight features down to ±0.01 mm may be reviewed based on material, geometry, feature size, part stability and inspection method. |
| Can you inspect the parts? | CMM inspection, first article inspection, dimensional reports, thread gauges, pin gauges and material certificates are available based on project requirements. |
| Can you support finishing? | Yes. Common finishing options include anodizing, black anodizing, bead blasting, passivation, plating, polishing and powder coating. |
| Do you support prototypes and low-volume orders? | Yes. CNC milling projects can be reviewed for prototypes, low-volume builds, pilot runs and repeat production. |
| Is NDA available? | Yes. NDA can be arranged before file review when your project requires confidentiality. |
Machine Capability
CNC Milling Equipment & Manufacturing Range
Before quoting, our engineers review machine fit, fixture strategy, feature access, tolerance risk and inspection requirements. Final capability is confirmed from the part drawing, material and production quantity.
| Capability Area | Manufacturing Range | Best For |
|---|---|---|
| 3-Axis CNC Milling | Vertical machining centers for housings, plates, brackets, pockets, tapped holes, slots and precision surfaces. | Plates, housings, brackets, pockets, tapped holes, counterbores and general CNC milled parts. |
| 4-Axis CNC Milling | Rotary milling setups for multi-side machining, side features and components requiring fewer setups. | Multi-side features, better datum alignment, side holes, rotary features and parts requiring fewer setups. |
| 5-Axis CNC Milling | Multi-axis machining capability for angled faces, complex contours, aerospace-style brackets and high-value precision parts. | Angled faces, complex brackets, contoured surfaces, multi-surface parts and reduced setup error. |
| Large-Format CNC Milling | Large-part milling capability for plates, frames, fixtures, enclosures and industrial equipment components. | Frames, plates, fixtures, enclosures and larger industrial equipment components. Maximum size is confirmed after CAD review. |
| Typical Tolerance | Standard tolerances based on drawings and ISO 2768 requirements. Tight features down to ±0.01 mm may be reviewed for selected materials, geometries and inspection methods. | Critical assembly features, datum surfaces, threaded holes, precision pockets and controlled mating surfaces. |
| Inspection Equipment | CMM inspection, height gauges, micrometers, calipers, thread gauges, pin gauges and surface roughness checks are available based on project requirements. | Projects requiring dimensional reports, FAI, material certificates, CMM checks or controlled batch inspection. |
Why Choose Baosheng
Built for Engineering Buyers
The CNC milling workflow is designed around drawing review, manufacturability feedback, material and finishing coordination, inspection planning and clear RFQ communication.
Factory-direct machining workflow
Engineering review and production coordination handled within one manufacturing workflow.
DFM feedback before production
Potential issues such as thin walls, deep pockets, tight radii and difficult tolerances are reviewed before machining.
Prototype to low-volume production
Suitable for engineering samples, pilot builds, bridge production and repeat custom parts.
Inspection documentation available
CMM checks, dimensional reports, material certificates and FAI can be arranged based on project requirements.
Engineering Fit
When CNC Milling Is the Right Process
CNC milling is suited for parts with flat surfaces, pockets, holes, threaded features, slots, contours and machined datum faces. It is commonly selected when a part must hold assembly alignment, surface flatness or repeatable feature relationships.
For round components such as shafts, pins, spacers and bushings, CNC turning service may be more efficient. For angled faces, undercuts or complex multi-surface parts, 5-axis CNC machining can reduce setups and improve feature-to-feature consistency.
our servicesC
3-Axis, 4-Axis and 5-Axis CNC Milling
Different milling strategies are selected based on geometry, datum control, tolerance requirements, cosmetic surfaces and production quantity.
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3-Axis CNC Milling
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4-Axis CNC Milling
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5-Axis CNC Milling
Part Types
Custom CNC Milled Parts We Manufacture
Baosheng supports CNC milled parts for mechanical assemblies, electronics, automation equipment, robotics, medical devices and industrial machinery. Send CAD files and drawings so our engineers can review part geometry, tolerance risk and finishing requirements.
- Aluminum housings
- Electronic enclosures
- Mounting brackets
- Heat sinks
- Precision plates
- Motor mounting plates
- Aerospace brackets
- Robotic components
- Jigs and fixtures
- Medical device parts
- Valve blocks
- Industrial machine parts
Materials & Finishes
CNC Milling Materials and Finishing Options
Material affects tool wear, tolerance stability, surface finish, cost and lead time. Our team can review your drawing and recommend practical alternatives when strength, corrosion resistance, weight or appearance requirements are unclear.
Finishing is coordinated after machining to control corrosion resistance, wear, appearance and assembly requirements.
Aluminum CNC Machining
Housings, brackets, heat sinks and lightweight components.
Stainless Steel CNC Machining
Corrosion-resistant industrial and medical components.
Titanium CNC Machining
Lightweight high-strength parts for demanding applications.
Brass CNC Machining
Connectors, fittings and precision mechanical components.
Anodizing
Common finish for aluminum milled parts.
Black Anodizing
Used for cosmetic aluminum housings and brackets.
Bead Blasting
Uniform matte texture for machined metal parts.
Passivation
Corrosion resistance for stainless steel components.
Need help choosing material or finish?
Send your CAD files and our engineers will review machining feasibility, tolerance risks, material options and surface finishing requirements before quoting.
Quality Control
Tolerance Review, Inspection and Reporting
CNC milled parts can include flatness requirements, threaded holes, pocket depths, datum surfaces and cosmetic finishes. Each drawing is reviewed before production to define critical dimensions and suitable inspection methods.
Drawing Review
Critical dimensions, surfaces and tolerances identified.
DFM Feedback
Thin walls, deep pockets and tolerance risks reviewed.
Material Check
Material grade and certificate needs confirmed.
First Article
Initial part dimensions checked before batch production.
In-Process QC
Key features checked during machining.
Final Inspection
CMM, gauges or manual inspection based on drawing.
Report
Dimensional report and inspection records upon request.
Application Proof
CNC Milling Case Studies
A strong CNC milling case should show the part, material, machining process, finishing, inspection method and manufacturing challenge.
| Project | Material / Process | Challenge | Inspection / Result |
|---|---|---|---|
| Black Anodized Aluminum Control Housing | 6061-T6 aluminum · 3-axis CNC milling + tapping · black anodizing · 200 pcs | Thin walls, multiple threaded holes, cosmetic outer faces and assembly-fit requirements around the cover interface. | Adjusted fixture sequence to reduce deformation, protected cosmetic faces before anodizing, checked threads with gauges and provided a key dimension report. |
| Lightweight UAV Mounting Bracket | 7075-T6 aluminum · 5-axis CNC milling · clear anodizing · 80 pcs | Angled mounting faces, weight-reduction pockets and datum relationships that were difficult to hold with repeated re-clamping. | Used a multi-axis machining strategy to reduce setups; CMM inspection was used for datum and hole-position checks before shipment. |
| Stainless Steel Medical Test Fixture Component | 316L stainless steel · precision CNC milling · deburring + passivation · 60 pcs | Small contact surfaces required clean edges, corrosion resistance and stable dimensions for repeated test fixture assembly. | Controlled deburring on functional edges, passivated parts after machining and supplied dimensional inspection records for critical features. |
| Robotics End-Effector Mounting Plate | 7075 aluminum · CNC milling + bead blasting · 120 pcs | Flatness, hole alignment and weight control were important for repeatable robot end-effector positioning. | Machined datum surfaces first, inspected hole pattern and flatness, then bead blasted parts for a uniform matte finish. |
Project Workflow
How to Order CNC Milled Parts
1.Upload CAD
Send STEP, STP, IGS, X_T, SLDPRT or drawings.
2.Engineering Review
We check geometry, tolerance, material and finish.
3.Quote
Receive price, lead time and production notes.
4.Machining
CNC milling starts after drawing and order confirmation.
5.Inspection
Critical features are inspected according to requirements.
6.Delivery
Parts are packed and shipped for your production schedule.
Industries
CNC Milling for Precision Engineering Applications
Aerospace CNC Machining
Lightweight brackets, housings and structural components requiring stable datum control.
Medical CNC Machining
Stainless steel and titanium components requiring controlled edges, surfaces and inspection.
Robotics CNC Machining
Motor plates, joints, fixtures and custom mechanical parts for automation systems.
DFM Guidance
Design Details That Affect CNC Milling Cost
Cost and lead time are driven by material, number of setups, pocket depth, wall thickness, tolerance zones, surface finish and inspection requirements. Applying tight tolerances only to functional features can reduce machining time and inspection burden.
- Add internal corner radii instead of sharp internal corners.
- Avoid deep narrow pockets when strength and design allow.
- Increase thin walls to reduce chatter and deformation risk.
- Clearly define threads, datum surfaces and inspection requirements on 2D drawings.
For broader pricing factors, review CNC machining cost.
Your questions answered
CNC Milling FAQs
What information do you need for an accurate CNC milling quote?
For the most accurate quote, send 3D CAD files, a 2D drawing if tolerances or threads are important, material, quantity, surface finish, target lead time and any inspection requirements.
Can you quote without a 2D drawing?
Yes, we can often provide an initial quote from a 3D CAD file. A 2D drawing is recommended when your part has tight tolerances, threads, surface finish requirements, special materials or inspection documentation needs.
Do you support prototype and low-volume CNC milling?
Yes. Baosheng supports CNC milling for engineering prototypes, low-volume production, pilot builds and repeat custom parts.
What materials can Baosheng CNC mill?
We can CNC mill aluminum, stainless steel, steel, titanium, brass, copper and engineering plastics such as POM, PEEK, ABS, nylon, PTFE and PC.
What tolerances can you achieve for CNC milled parts?
Tolerance depends on material, geometry, feature size and inspection method. Standard tolerances are applied based on drawings, while tight features down to ±0.01 mm may be reviewed for selected applications.
Can you help choose material and surface finish?
Yes. Our engineers can review strength, weight, corrosion resistance, appearance and application requirements to suggest suitable material and finishing options.
Can you sign an NDA before reviewing files?
Yes. NDA can be arranged before file review when your drawings or project information require confidentiality.
Do you ship CNC milled parts internationally?
Yes. CNC milled parts can be packed and shipped internationally based on project schedule, part requirements and customer shipping preferences.
Get a Quote for CNC Milled Parts
Upload your CAD files and tell us your material, quantity, tolerance and surface finish requirements.
- NDA available before file review
- DFM feedback before production
- CMM and dimensional reports available
- Material certificates upon request
- Multiple CAD and drawing files supported
Visit us
308, Building A, Chang'an Zhigu, Annex Building, No. 199 Shajiang Road, Xitou Community, Songgang Street, Bao'an District, Shenzhen, Guangdong, China.
Email Us
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Call Us/Whatsapp
+86 17727904392
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