CNC Machining Capabilities
Emitech operates a dedicated CNC machining facility in Nanjing, China with comprehensive capabilities spanning precision milling, turning, 5-axis machining, and integrated MIM + CNC secondary operations. Whether you are sourcing a cnc machine shop partner for recurring production, evaluating precision machining services for a prototype program, or qualifying a cnc machining manufacturer for long-term supply, this page outlines every capability, tolerance, material, and quality checkpoint in one place.
Quick Answer
CNC machining capabilities at Emitech cover 3-axis and 5-axis CNC milling, CNC turning with live tooling, precision machining down to ±0.01 mm, and hybrid MIM + CNC secondary operations. We machine aluminum, stainless steel, brass, titanium, and engineering plastics from a single ISO 9001:2015 facility in Nanjing, shipping worldwide to OEMs in automotive, medical, electronics, and general industrial equipment. Send your STEP or PDF drawing for a feasibility review and quote, typically within one business day.
CNC Capability Overview
Our CNC machining floor in Nanjing is organized around five core capability areas. Each area operates with dedicated tooling libraries, standardized workholding, and documented process controls so that a prototype machined on one machine center matches production parts from a different cell. This architecture supports fast new-part introduction and consistent repeatability across release lots.
CNC Milling
3-axis, 4-axis, and simultaneous 5-axis vertical machining centers for prismatic parts, contoured surfaces, pockets, slots, and multi-sided workpieces. Our CNC milling services page details axis configurations, work envelope, and materials.
CNC Turning
Two-axis through five-axis turning on CNC lathes with live tooling supports cross-drilling, tapping, and milling features without secondary setups. See CNC turning services for shaft, bushing, and threaded-part capabilities.
5-Axis Machining
Simultaneous 5-axis machining reduces setups from four or more to one, improving positional accuracy on complex contours, undercuts, and angled features. Ideal for medical housings, aerospace brackets, and multi-sided connectors.
Precision Machining
Our precision machining services hold tolerances to ±0.01 mm on critical features with CMM verification. We run tight-bore reaming, fine-thread tapping, and flatness-critical face milling with documented SPC data per lot.
MIM + CNC Secondary
Near-net metal injection molding blanks are finish-machined for threads, bores, flats, and sealing faces. This hybrid route reduces material waste and unit cost at production volumes. See MIM CNC secondary operations.
CNC Machining Services
Many buyers search for cnc machining services without yet knowing whether milling, turning, or multi-axis work is the best fit. Emitech's engineering team reviews every drawing with process selection in mind — we do not simply assign a part to the first available machine. The result is a service that recommends the right combination of processes, workholding, and finishing from the first quote.
Our CNC machining services span the full production lifecycle: prototype verification, first-article inspection, process validation, and recurring production. For prototypes, we program from native CAD and deliver within 3–7 business days. For production, we build documented processes with SPC data, tool-life management, and lot traceability from raw material certificate through final inspection. This manufacturing discipline is why global OEMs choose Emitech as their long-term cnc machining manufacturer.
24-Hour Quoting
Upload STEP, IGES, or PDF drawings. Our engineers review geometry, material, tolerance, and surface finish requirements and return a detailed quote within one business day — flagging any features that need special fixturing, 5-axis work, or secondary finishing.
ISO 9001:2015 Quality
Every production lot is measured against the drawing with calipers, micrometers, height gauges, and coordinate measuring machines. First-article reports, material certifications, and Certificates of Conformance are standard deliverables.
DFM Feedback Included
Before programming, we review each design for manufacturability. If a feature can be produced more cost-effectively with a different toolpath, material grade, or tolerance band, we propose it before cutting metal. See our DFM guidelines.
CNC Machine Shop Capabilities
Emitech is more than a general-purpose cnc machine shop — we are a process-driven manufacturing partner. Our Nanjing facility is equipped with a balanced mix of high-speed mills, multi-axis turning centers, and support equipment laid out for prototype-to-production scalability. A digital tooling library ensures that repeat orders use the same tool offsets and fixture configurations, reducing setup time and variation between lots. Preventive maintenance is scheduled weekly to keep spindle runout, positioning accuracy, and repeatability within specification.
Buyers evaluating a cnc machine shop for production typically ask three questions: capacity, quality systems, and lead time reliability. At Emitech, capacity ranges from single-piece prototypes to 10,000+ piece production releases. Quality is governed by ISO 9001:2015 with in-process inspection every two hours on critical dimensions. Lead times are committed and tracked — on-time delivery performance is tracked per program and reviewed regularly with customers. We do not overbook capacity, and we plan capacity with customers to support demand changes.
- CNC turning capacity: Two-, three-, and five-axis lathes with live tooling
- CNC milling centers: 3-axis, 4-axis, and simultaneous 5-axis vertical machining centers
- Maximum milling envelope: 800 × 500 × 400 mm
- Maximum turning diameter: Ø 300 mm with bar feeder and chuck options
- Support equipment: Wire EDM, surface grinding, tapping, deburring stations
- Capacity range: 1-piece prototypes to 10,000+ piece production runs per release
- Delivery tracking: On-time performance monitored per program
Precision Machining Services
When a drawing calls for precision machining services — true position tolerances, tight bore concentricity, or flatness across mating faces — process discipline matters more than machine brand. Emitech's precision machining approach combines CAM-level toolpath optimization, workholding designed to minimize distortion, and in-process measurement on every critical dimension.
Our standard tolerances follow ISO 2768-m for machined metals and ISO 2768-c for plastics. Tighter tolerances are quoted as special characteristics and verified with CMM or digital measuring equipment. For design-stage guidance, refer to our DFM guidelines and CNC machining services overview.
| Parameter | CNC Milling | CNC Turning |
|---|---|---|
| Standard tolerance | ±0.05 mm (ISO 2768-m) | ±0.02 mm (ISO 2768-m) |
| Tightest tolerance | ±0.01 mm on critical features | ±0.01 mm on critical diameters |
| Maximum workpiece size | 800 × 500 × 400 mm | Ø 250 × 400 mm |
| Minimum practical feature | 0.5 mm wall, Ø 1.0 mm hole | Ø 1.5 mm bore |
| Surface finish (as machined) | Ra 0.8 – 3.2 μm | Ra 0.8 – 3.2 μm |
| Repeatability | ±0.01 mm | ±0.01 mm |
Our quality inspection process for precision machining includes CMM dimensional reports, surface roughness verification with profilometers, and full material traceability. For medical and aerospace programs requiring tighter documentation, we provide first-article inspection reports and PPAP documentation for automotive customers per program requirements.
CNC Machining Parts Manufacturing
As a cnc machining parts manufacturer, Emitech produces components across the complexity spectrum — from simple brackets and spacers to multi-feature housings with internal threads, seal grooves, and tight positional tolerances. We do not limit our scope to one industry or part family. The same engineering team that programs a 5-axis medical housing also handles high-volume automotive sensor brackets and low-volume industrial tooling components.
For buyers sourcing cnc machining parts in volume, Emitech offers the stability of a single manufacturing partner who can scale from CNC prototyping validation through production without re-sourcing, re-qualifying, or transferring tooling between vendors. For OEM component programs, see our custom CNC machined parts page. Every CNC machined part we ship includes dimensional verification against the customer drawing — full inspection on critical features for production lots under 500 pieces, and SPC-based sampling for higher volumes with documented control limits.
Materials for CNC Machining
Material selection influences machinability, tooling cost, cycle time, and final part performance. Emitech stocks common aluminum, stainless steel, and carbon steel grades for fast turnaround, while specialty alloys and plastics are sourced against confirmed orders. Our engineers recommend the grade that best balances mechanical properties, corrosion resistance, and manufacturing economics for your application.
| Category | Common Grades | Typical Applications |
|---|---|---|
| Aluminum | 6061-T6, 6063, 7075, 2024 | Lightweight housings, heat sinks, brackets, prototypes |
| Stainless Steel | 303, 304, 316L, 17-4 PH | Medical instruments, corrosive-environment parts, food-grade components |
| Carbon & Alloy Steel | 12L14, 4140, 4340, 1045 | Shafts, gears, high-strength structural parts, tooling |
| Copper Alloys | Brass C360, C932 Bronze | Electrical contacts, bushings, decorative hardware |
| Titanium | Grade 2, Grade 5 (Ti-6Al-4V) | Medical implants, aerospace fasteners, lightweight structural parts |
| Engineering Plastics | POM (Delrin), PEEK, PTFE, Nylon | Insulators, low-friction bushings, quick-turn prototypes |
For stainless steel machining programs, our 17-4 PH stainless guide covers heat treatment effects on hardness and corrosion resistance. For shafts and high-strength components, see our 4140 steel properties guide. Titanium projects can leverage both our CNC capability and our titanium MIM guide when comparing process routes.
Surface Finishes
Surface finish is specified during quoting so that critical dimensions remain in tolerance after treatment. Processes such as anodizing add a measurable oxide layer, while plating and polishing remove stock. Emitech sequences finishing operations before final inspection and ships finished parts ready for assembly.
- As machined: Ra 0.8 – 3.2 μm; tool marks visible; standard for functional parts
- Bead blasting: Uniform matte finish; improves coating adhesion and cosmetic consistency
- Anodizing (Type II & III): Hard, corrosion-resistant oxide layer for aluminum; clear or dyed
- Passivation: Restores corrosion resistance on stainless steel after machining
- Electroless nickel / chrome plating: Wear and corrosion protection for steel and copper alloys
- Polishing: Mirror or satin finishes for decorative, sealing, or low-friction surfaces
Our surface treatment page covers many of the same processes used after MIM and CNC operations.
Industries We Serve with CNC Machining
Emitech supplies CNC machined parts to OEMs across multiple regulated and high-specification industries. Each industry brings distinct material, tolerance, documentation, and regulatory requirements — we align our process planning to meet those expectations from the first article.
Automotive
Sensor brackets, valve components, connector housings. PPAP documentation and automotive-aligned quality systems. High-volume production with SPC data and lot traceability.
Medical
Surgical instruments, endoscopic housings, implant tooling. Biocompatible materials, Class IIa/III documentation support, passivation and electropolishing available.
Aerospace
Lightweight structural brackets, sensor mounts, connector bodies. Titanium and aluminum machining, first-article inspection reports, and full material traceability.
Consumer Electronics
Chassis frames, heat sinks, precision mounting brackets. Cosmetic-grade anodized finishes, high-volume consistency, minimal part-to-part variation.
Industrial Tools
Fixtures, wear pads, gear blanks, hand-tool inserts. High-wear alloys, hardened and tempered finishes, tight bore and thread tolerances.
General Manufacturing
Automation components, machine parts, adapters, custom one-off tooling. Flexible batch sizes from 1 to 10,000+ pieces with consistent lead times.
Frequently Asked Questions
What CNC machining capabilities does Emitech offer?
Emitech provides CNC milling (3-, 4-, and 5-axis), CNC turning (with live tooling), 5-axis simultaneous machining, precision machining to ±0.01 mm, and MIM + CNC secondary operations — all from our ISO 9001:2015 facility in Nanjing, China. See our CNC machining services page for process-level details.
Is Emitech a CNC machine shop that handles production volumes?
Yes. Emitech is a production-scale CNC machine shop, not a prototype-only job shop. We run single-piece prototypes through 10,000+ piece production releases with documented SPC, tool-life management, and on-time delivery exceeding 97%. For customers evaluating a long-term CNC machining partner, we offer capacity reservation and reserve tooling for high-volume programs.
What precision machining tolerances can you hold?
Our standard tolerances are ±0.05 mm for CNC milling (ISO 2768-m) and ±0.03 mm for CNC turning. On critical features with suitable material and geometry, we hold ±0.01 mm, verified by CMM. Repeatability across production lots is ±0.01 mm. Tighter requirements are reviewed during quoting with proposed inspection methods and tooling strategy.
What CNC machining parts do you manufacture most often?
We manufacture sensor brackets, valve bodies, connector housings, medical instrument handles, aerospace mounting brackets, heat sinks, shaft components, bushings, and industrial tooling inserts. The most common materials are 6061-T6 aluminum, 316L stainless steel, 304 stainless steel, 12L14 carbon steel, and C360 brass. Our CNC machining services page lists additional part families and applications.
How does Emitech compare as a CNC machining manufacturer versus local shops?
As a China-based CNC machining manufacturer with ISO 9001:2015 certification and global shipping, Emitech combines competitive unit pricing with documented quality systems that meet Western OEM requirements. We provide first-article reports, material certifications, SPC data, and full lot traceability — the same documentation package expected from domestic suppliers. International shipping via air and sea freight is coordinated in-house with full customs support.
What materials do you machine?
We machine aluminum alloys (6061, 6063, 7075), stainless steels (303, 304, 316L, 17-4 PH), carbon and alloy steels (12L14, 4140, 4340), copper alloys (C360 brass, C932 bronze), titanium (Grade 2, Grade 5 / Ti-6Al-4V), and engineering plastics (POM, PEEK, PTFE, Nylon). Stocked grades ship faster; specialty alloys are sourced against confirmed orders.
What is the typical lead time for CNC machined parts?
Prototypes typically ship in 3–7 business days after drawing approval. Production lead time ranges from 2–4 weeks depending on batch size, material availability, and surface finishing requirements. Rush service is available for time-critical programs. Contact our engineering team for a project-specific lead time estimate.
Can you provide CNC machined parts with surface finishing?
Yes. We offer as-machined, bead-blasted, anodized (Type II and III), passivated, electroless nickel plated, chrome plated, and polished finishes. Finishing is sequenced before final inspection so dimensions remain in tolerance after treatment. Multi-process parts are managed internally — you receive finished components, not work-in-progress.
How do CNC and MIM work together at Emitech?
For parts with complex near-net geometry (produced by MIM) that also require tight-tolerance bores, threads, or flat sealing faces, Emitech machines the critical features in a secondary CNC operation without the part leaving our factory. This hybrid route is cost-effective at annual volumes above roughly 5,000 pieces. See our MIM CNC secondary operations page and MIM vs CNC comparison.
How do I request a quote for CNC machining services?
Send your STEP, IGES, or PDF drawing with material specification, estimated annual volume, critical tolerances, and any surface finish requirements to yaoqingpu1983@gmail.com or message us on WhatsApp at +86 138 1403 4409. Our engineering team returns a detailed quote with DFM feedback within one business day.
Source Precision CNC Machined Parts from Emitech
Nanjing Emitech (ISO 9001:2015) delivers CNC machining — from prototype through production — with documented quality, global shipping, and quotes within one business day. CNC machining services · Custom MIM parts · Request a quote