We provide on-demand custom CNC machining services, covering turning, milling, EDM, wire-cutting and other processes. We produce precision metal and plastic parts from prototype to mass production.
130+
Manufacturing equipment
10+
CNC process routes
With over 130 units of equipment supporting 10+ CNC machining processes, we are well-equipped to handle tight-tolerance requirements and complex machined parts. Experience our precision CNC machining services and be our next satisfied customer.
Multi‑process capabilities to meet strict tolerance & custom component demands.We delivery both simple and complex parts with lead times as fast as 3 days. Backed by ISO certifications, we ensure precision and consistency every time.
Process descreption
Primarily used to machine complex 3D structures, flat surfaces, grooves, and multi-sided parts. More axes support greater part complexity; 5-axis milling enables high-precision simultaneous multi-face machining and is suitable for precision structures such as optical sight housings.
Process descreption
Specialized in rotational parts such as shafts, sleeves, and gears. The spindle rotates while the cutting tool feeds to produce high-precision circular profiles. This process is efficient for volume production and is a core method for parts such as objective-lens focusing gears.
Process descreption
A precision finishing process that uses a high-speed grinding wheel on the part surface. It significantly improves surface finish and dimensional accuracy and is suitable for precision parts with extremely demanding surface and tolerance requirements.
Process descreption
Combines turning and milling so multiple operations on rotational parts can be completed in one setup. This reduces setup error, improves machining efficiency and accuracy, and suits integrated machining of complex rotational precision parts.
Process descreption
Designed for small precision parts from 0.1 to 20 mm in diameter. It feeds slender bar stock and can achieve tolerances of ±0.001 mm, making it suitable for miniature precision shafts, small fasteners, and other tiny parts.
Process descreption
Uses electrical erosion with no cutting force. It can machine hard materials and complex cavities, such as mold cavities and irregular holes, without material hardness affecting accuracy. It is suitable for complex structures made from difficult-to-cut materials.
A type of EDM that uses an electrically charged metal wire to cut parts without cutting force. It provides high machining accuracy and is suitable for complex irregular contours, mold inserts, and high-precision cutting of hard materials.
Comprehensive Manufacturing Specifications for Custom Precision CNC Components, Delivering Tight Tolerances, Stable Quality & Cost-Effective Custom Machining Solutions
Swipe horizontally to review every specification
| Process | Conventional tolerance(mm) | conventional materials | Parts type |
|---|---|---|---|
| 3/4 Axis CNC Milling5 Axis CNC Milling | ±0.01~±0.02 mm±0.005~±0.01 mm | Aluminum, stainless steel, copper, titanium alloy, POM, PEEK, ABS | High-precision optical shells, special-shaped complex structural parts, aerospace precision components, cavity structural parts, curved surface precision parts |
| CNC Turning | ±0.005-±0.02 | Aluminum, stainless steel, copper, brass, 45# steel, engineering plastics | Shaft parts, sleeves, nuts, bolts, circular fasteners, objective focusing gears, valve cores, cylindrical pins, bearing sleeves |
| CNC Grinding | ±0.001-±0.005 | Mold steel, stainless steel, cemented carbide, bearing steel, aluminum alloy | High-precision shafts, bearing inner and outer rings, mold thimbles, precision guide rails, precision gears, precision gaskets, valve core sealing components |
| CNC Turn-mill Combination | ±0.003-±0.01 | Aluminum, stainless steel, titanium alloy, copper, engineering plastics | Keyway shaft parts, special-shaped sleeves, complex rotary parts, special-shaped shafts, precision mechanical connectors, multi-functional fasteners |
| Swiss-type Lathe | ±0.001-±0.005 | Stainless steel, copper, aluminum, titanium alloy, high-strength precision materials | Micro precision shafts, tiny fasteners, miniature optical accessories, medical micro parts, electronic precision pins, slender shafts, precision needle parts |
| Sinker EDM(Electrical Discharge Machining) | ±0.003-±0.01 | Mold steel, cemented carbide, hardened steel, titanium alloy, difficult-to-cut conductive metals | Mold cavities, mold inserts, special-shaped holes, high-hardness complex structural parts, precision grooves, forming electrodes |
| Wire Cut Machining (WEDM) | ±0.001-±0.005 | Mold steel, stainless steel, tungsten steel, copper, aluminum, all conductive metals | Mold inserts, special-shaped contour parts, narrow groove parts, precision thin sheets, filter screens, gear concave dies, special-shaped electrodes |
Our standardized workflow covering material preparation, in‑process checks and multi‑level quality control for custom CNC components before final shipment.
Prepare the necessary inspection tools and equipment in advance, and purchase materials
Complete inspection and file qualified master samples during production. All mass-produced parts shall be manufactured and inspected strictly in accordance with archived master samples.
Technicians or operators shall verify and confirm the qualification of the first article, followed by QC confirmation.
Operators and QC staff shall conduct regular random sampling on in-production parts. Any detected issues shall be reported and handled promptly.
Flows into the warehouse or the next process
All non-conforming parts shall be marked and isolated, then subjected to full inspection, rework or scrap disposal.
Only parts passing final inspection can be packaged and shipped.
Case Studies
Here are some of the CNC machining projects that ZHD Precision have done for our customers. They feedback their happiness when they receive the parts and allow us share the parts here.
Representative project profile
Deep pockets, thin walls and multi-face features require stable clamping and accurate feature positioning.
DFM review, multi-axis machining and in-process inspection control deformation and positional accuracy.
We always stand side‑by‑side with our customers. Through professional expertise and proactive communication, we ensure the delivered parts perform excellently in practical applications.
ZHD Precision operates advanced in-house manufacturing and inspection facilities equipped with HAAS CNC mills and lathes, Hexagon CMMs, and Olympus XRF analyzers. This integrated setup ensures all custom CNC parts are produced with verified material integrity and precise dimensions. By managing the process internally, we provide higher consistency for your components, from functional prototypes to small-batch production runs.
Receive a professional quote within 24 hours of uploading your 3D CAD files. Our senior engineers perform a thorough part geometry analysis to identify challenging features, such as thin walls or unthreadable holes. We provide actionable feedback based on extensive CNC experience, helping you optimize designs for better manufacturability and cost-efficiency before we begin production.
ZHD Precision maintains ISO 9001:2015 certification and employs rigorous quality control at every production stage. Our CMM inspection systems verify dimensional accuracy to tight tolerances, while full material certifications and Certificates of Conformance (CoC) are available upon request. We also support first article inspection (FAI) reports and provide comprehensive dimensional inspection reports, ensuring full traceability from raw material to finished part.
Every project is supported by dedicated technical, production, quality inspection and logistics teams, who oversee the entire procedure from drawing review to final product delivery.This ensures faster communication between us and our customers, significantly shortening the delivery cycle.
Optimize your parts for cost-effective CNC manufacturing with our design guidelines. Our engineers provide design-for-manufacturability (DFM) feedback before production, helping you move smoothly from prototyping to production.
Explanation: Maintain a minimum wall thickness of 0.8mm for metal parts and 1.5mm for plastic parts. Reason: Ultra-thin walls easily vibrate and deform during cutting, causing dimensional deviations and high scrap rates.
Explanation: Adopt uniform rounded inner corners instead of sharp right-angle corners. Reason: Sharp inner right angles are unachievable with standard end mills. Standard radii eliminate extra EDM work to save time and cost.
Explanation: Limit the groove depth-to-width ratio within 4:1. Reason: Deep narrow grooves need fragile slender tools, leading to easy tool breakage, low efficiency and unstable surface quality.
Explanation: Use standard hole sizes and keep blind hole depth within three times the hole diameter. Reason: Non-standard holes require custom tooling. Overly deep blind holes cause poor chip removal, resulting in rough inner walls and inaccurate dimensions.
Explanation: Reduce undercut features that cannot be processed vertically. Reason: Undercuts require repeated re-clamping, 5-axis machining or auxiliary EDM processes, greatly increasing production costs.
Explanation: Apply tight tolerances only to critical assembly dimensions. Reason: Excessive tight tolerances increase machining and inspection costs without boosting part performance.
Explanation: Avoid independent slender raised bosses and pins on part surfaces. Reason: Tall thin protrusions are prone to vibration damage and breakage during machining, finishing and packaging.
Explanation: Reserve flat clamping surfaces and avoid fully enclosed hollow structures. Reason: Parts lacking valid clamping points need custom fixtures, which extend setup time and raise extra costs.
Read recent technical articles related to this service before preparing your RFQ.
cnc
1. Why CNC matters for complex metal housings 2. What the part tells you about the manufacturing route 3. Key features buyers should evaluate 4. Why cast-and-machined aluminum is so common 5. Selection criteria that actually help 6. Practical buyer cautions 7. What to ask before you place an order 8. Next step
cnc
1. Why CNC machining matters for cast aluminum housings 2. What this kind of part is designed to do 3. Why high-pressure die casting is often paired with CNC machining 4. Key features buyers should evaluate 5. Common mistakes when sourcing this type of housing 6. What to ask a supplier before ordering 7. How this connects to real buyer decisions 8. FAQ: quick buyer questions 9. Next step
cnc
1. Why CNC machining matters on a complex cast housing 2. What buyers should look for first 3. How the casting and machining stages work together 4. Common sourcing mistakes with machined cast housings 5. Practical selection advice for engineering and procurement teams 6. FAQ: a few questions buyers usually ask 7. What to do next
cnc
1. Why CNC matters on cast housings and functional bodies 2. What this type of part is trying to achieve 3. Quick buyer takeaway: what to check before you approve the part 4. Why cnc machining is the critical step 5. Design and sourcing criteria that matter most 6. Common mistakes buyers still make 7. Practical questions to ask a supplier 8. Next step
CNC machining is a subtractive precision manufacturing technology. It adopts computer-programmed tool paths to cut excess materials from solid workpieces, producing high-precision, high-repeatability custom parts. Our available processes include 3/4-axis milling, 5-axis milling, turning, turn-mill combination, Swiss-type lathe, EDM and wire cut, suitable for prototype verification and mass production of complex mechanical parts.
We accept industry-standard file formats including STEP, IGES, STL, DXF and DWG. 3D files are used for structural programming and production, while 2D drawings with marked tolerances, surface finish and material requirements are essential for accurate quotation and quality inspection. Clear design documents effectively avoid production errors and shorten delivery time.
Lead time depends on part complexity, material and order quantity. Standard prototype orders take 3–7 working days; small-batch products take 7–14 working days; large-batch mass production takes 2–4 weeks. Fast-track urgent production is available to meet clients’ tight project schedules.
With self-owned surface treatment factory, we provide one-stop post-processing services, including sandblasting, anodizing, polishing, powder coating, electroplating, passivation and black oxide treatment. Diversified surface treatments improve parts’ corrosion resistance, wear resistance, aesthetics and durability, meeting different assembly and application scenarios.
We implement strict full-process quality control. Operators finish self-inspection and QC conducts patrol inspection during production. All products undergo final inspection before delivery. We adopt master sample comparison, dimensional testing and appearance inspection, with complete inspection records archived. Non-conforming parts will be marked, isolated, reworked or scrapped strictly following SOP to ensure all delivered parts meet client specifications.
Yes. Our professional engineering team provides free design for manufacturing (DFM) optimization. We optimize wall thickness, corner radius, groove structure and tolerance settings without affecting part performance, effectively reducing processing difficulty, avoiding secondary procedures, cutting unnecessary production costs and shortening lead time for clients.
Contact our team if you need further information about CNC machining, materials, tolerances, inspection or project delivery.
