Custom Machined Parts Manufacturer in China
CNC Machining Services
CNC turning, CNC milling, and Wire EDM for custom metal components—from drawing review and prototypes through repeat production runs.
Request a QuoteEngineering-Led Manufacturing
Custom CNC Machining from Drawing to Production
Balford offers CNC machining services in China for custom parts made to your drawings. We evaluate CNC turning, milling, and Wire EDM individually or combine them with stamping, sheet metal fabrication, finishing, and assembly. The engineering goal is to lock in a stable production route that protects functional datums, tool access, surface finish, and inspection requirements without adding unnecessary setups.
Quotes start with the 3D model and controlled 2D drawing, material grade, quantities, finish, and critical features. Our team reviews stock form, workholding, setup sequence, cutting access, thin-wall sections, internal radii, thread specs, and measurement strategy. We flag cost drivers or risk items before production so you can make an informed design decision.
We handle rotational parts—shafts, bushings, fittings, spacers—plus plates, blocks, housings, tooling components, and other engineered metal parts. Prototype and production approaches are matched to your order pattern, and any deburring, surface treatment, marking, or assembly is folded into the process review.
Discuss Your DrawingProcess Options
Core CNC Machining Processes
Each process has different strengths. Many parts use more than one operation, but the datum and setup plan stay clear throughout.
CNC Turning
CNC turning suits round and rotational geometry—shafts, bushings, sleeves, pins, fittings, and threaded components. Live tooling or secondary operations can add cross holes, flats, or milled features where the part and production route support them.
Learn MoreCNC Milling
CNC milling cuts pockets, slots, faces, holes, and 3D profiles in plates, blocks, and complex components. Tool access, internal radii, workholding, and setup count heavily influence cost and repeatability.
Learn MoreWire EDM
Wire EDM cuts conductive materials with low cutting force—ideal for intricate profiles, narrow features, and hardened tooling components. We review start holes, corner radius, taper, skim cuts, and inspection access against the drawing.
Learn MoreTechnical Comparison
CNC Process Selection Guide
| Process | Typical part geometry | Material strength | Design review questions |
|---|---|---|---|
| CNC turning operations | Rotational OD/ID, grooves, and threads | Precise control of concentric features | Can critical diameters share a common datum and setup? |
| CNC milling operations | Faces, pockets, slots, holes, and contoured surfaces | Efficient production of prismatic and complex geometries | Can the tool reach the feature with a practical radius? |
| Wire EDM cutting | Through profiles, narrow slots, and hard conductive materials | Low cutting force with accurate profile control | Is a start hole required, and what corner radius is acceptable? |
| Combined machining processes | Parts with both rotational and prismatic features | Reduces part handoffs when the setup strategy is planned upfront | Which setup protects the most critical datum relationships? |
| Machining combined with fabrication | Stamped, cut, or formed blanks with final machined interfaces | Places machining only where function requires it | Can near-net manufacturing reduce stock removal and cycle time? |
Manufacturing Control
Design for Machinability and Repeatability
A machinable model can still be costly or unstable in production. Early review identifies features that require long tools, tricky workholding, or excessive inspection.
Datums and Workholding
The part must be located without blocking critical features or distorting thin sections. Stable reference surfaces and clamping access help reproduce the same geometry from setup to setup and batch to batch.
Tool Access and Internal Radii
Rotating tools need clearance to enter, cut, and exit. Deep pockets, hidden undercuts, and sharp internal corners can demand special tooling or a secondary operation. A practical radius often improves machining stability and cost.
Tolerance and Surface Finish
Tight tolerances and fine finishes should be specified only where they protect function. Applying the same requirement to every surface increases setup time, cutting time, and inspection. Balford reviews feature-specific needs with the customer.
Inspection Strategy
Dimensions, threads, position, runout, profile, and surface condition each require different methods. The drawing and control plan should identify critical characteristics, sampling expectations, and any first-article or material documentation.
Material Planning
Machined Materials and Finishing Considerations
Material grade, stock condition, heat treatment, and final finish all affect tool life, distortion, dimensional stability, and process sequence. Make sure the full spec is on the RFQ so we can plan accordingly.
Aluminum alloys
Common for lightweight housings, plates, and equipment parts. Alloy and temper drive cutting behavior, thread quality, anodizing response, and dimensional stability—so call them out explicitly.
Carbon and alloy steels
Used for shafts, fasteners, fixtures, and structural parts. Hardness, heat treatment, and coating sequence determine machining allowances and where we need to leave stock for post-processing.
Stainless steels
Chosen for corrosion resistance and strength. Work hardening and heat generation are real issues, so we select tooling and feeds/speeds to hold surface finish and avoid galling.
Copper and brass
Used for conductive, fluid, and precision components. Burr control, surface protection, and material handling matter—especially for threaded features and sealing surfaces.
Engineering plastics and special alloys
We can evaluate these for application-specific parts, but material certification, dimensional stability, tooling compatibility, and contamination control need to be nailed down upfront.
Application Experience
Custom Machined Part Applications
Automotive and Mobility
Shafts, spacers, fittings, housings, and precision interfaces for sensor, motor, fluid, and equipment assemblies—typically tight tolerances and high-volume repeatability.
Industrial Equipment
Machine components, tooling details, brackets, plates, and replacement parts machined to controlled drawings. We work from your prints, not guesswork.
Fluid and Valve Systems
Threaded fittings, sleeves, valve components, and sealing interfaces that require controlled geometry and surface condition to prevent leaks and ensure function.
Electrical and Specialized Products
Heat-management parts, conductive components, compact hardware, and application-specific machined assemblies where material properties and tolerances are critical.
Evidence and Resources
Machining Resources and Project Guidance
These examples and technical resources show how we translate drawing requirements into a practical, repeatable production plan.
Custom Machined Parts: Drawing to Production
An overview of how materials, turning, finishing, kitting, and production planning come together for custom machined components—from print to part.
Learn MoreCNC Milling Design Guide
Practical guidance on datums, tool access, internal corner radii, pocket depth, thin walls, workholding, and drawing packages—so your parts are manufacturable the first time.
Learn MoreWire EDM Machining Guide
A design and sourcing guide covering conductive materials, start holes, profiles, corner radii, skim cuts, and inspection planning for tight-tolerance features.
Learn MoreProject Preparation
A Clear CNC Machining RFQ Reduces Rework
The 3D model defines shape; the 2D drawing defines material, tolerances, threads, finishes, and inspection requirements. Keep both on the same revision. Mark functional datums and critical dimensions so Balford can build the setup around the assembly—not treat every feature as equally tight.
Quantities drive the tooling strategy. A prototype run and a repeat production job solve different problems, so we need the prototype quantity, expected batch size, and annual demand up front. That lets us weigh flexible workholding against dedicated fixtures and pinpoint where tool-life or cycle-time optimization actually pays off.
If the machined part goes through plating, anodizing, heat treatment, welding, or assembly, those steps need to be in the quote from the start. Masking, finish buildup, distortion, and post-process inspection can all shift your machining allowance and the sequence of operations, so we flag those early.
Getting Started
Controlled Project Workflow
Submit Drawings
Send matching 3D and 2D files at the same revision, with material grade, finish, quantities, and critical features called out.
DFM and Process Review
We evaluate stock availability, setups, workholding, tool access, tolerance stack-ups, inspection methods, and any downstream operations.
Quotation and Planning
We confirm the process route, assumptions, lead-time basis, and any missing information needed to lock the quote.
Sample or First Production
We machine parts, inspect agreed-upon features, and resolve any drawing or process questions before moving forward.
Repeat Production
Approved repeat orders run off controlled programs, setup documentation, dedicated tooling, and a consistent inspection plan.
Frequently Asked Questions
CNC Machining Services FAQ
Our answers are based on drawing review because material, geometry, and production volume determine what's actually practical to machine.
Ask an EngineerWhat files are required for a CNC machining quotation?
Send a 3D model and a controlled 2D drawing at the same revision, plus material grade, finish, prototype and production quantities, critical dimensions, thread standards, and any first-article or certification requirements.
Can Balford handle both prototypes and repeat production?
Yes. We select the manufacturing route based on your order pattern. Prototype work leans on flexible setups, while repeat production justifies dedicated fixtures, optimized tooling, and a more detailed in-process control plan.
How should machining tolerances be specified?
Apply tight tolerances only to features that control fit, sealing, motion, or alignment, and use a sensible general tolerance elsewhere. Define datums, measurement conditions, and surface finish requirements clearly. We confirm drawing-specific capability during the DFM review.
Can sharp internal corners be CNC milled?
A standard rotating cutter leaves a radius. Sharp internal corners typically require a relief, Wire EDM, broaching, or another secondary process. If the corner isn't functionally sharp, allowing a practical radius cuts cost and improves tool stability.
Can finishing and assembly be included?
Yes. We coordinate deburring, cleaning, heat treatment, plating, anodizing, coating, marking, and selected assembly. Before approving the route, we review how these affect dimensions, masking, surface condition, and packaging.
Which materials can be CNC machined?
We evaluate aluminum, carbon and alloy steels, stainless steels, copper alloys, engineering plastics, and selected special alloys. Grade, hardness, stock form, certification, and finish requirements are confirmed on a project-by-project basis.
Secure Project Review
Send Balford Your Drawing
Share the latest revision, material, quantity, finish, and functional priorities. We can discuss NDA requirements before you exchange detailed project files.
Request for Quote