Custom CNC Machining Services
ISO 9001:2015 Certified | 3, 4 & 5-Axis Milling & Turning | ±0.01mm Tolerances | DFM Review Included
Qingdao Inside Industry provides precision CNC Machining Services from our ISO 9001:2015 certified factory in Qingdao, China. We specialize in 3-axis, 4-axis, and 5-axis CNC milling and turning for complex industrial metal components — from single prototype pieces to high-volume OEM production batches serving clients across 30+ countries.
Our facility holds tolerances down to ±0.01mm with full Hexagon CMM verification, covering all common industrial metals and engineering plastics. Every project begins with a complimentary DFM (Design for Manufacturability) review, ensuring your parts are optimized for cost and lead time before the first cut.
- ✔ ISO 9001:2015 Certified Facility
- ✔ ±0.01mm Tight Tolerance Capability
- ✔ Hexagon CMM + Optical Comparator Inspection
- ✔ No MOQ — Prototype to Mass Production
- ✔ DFM Review Included — Avg. 20% Cost Reduction
- ✔ 20+ Countries Served
Expert Services from China
CNC Machining Technical Specifications
| Parameter | Specification | Standard |
| Machining Centers | 3-axis, 4-axis, 5-axis CNC vertical & horizontal | — |
| Standard Tolerance | ±0.05mm | ISO 2768-m |
| Tight Tolerance | ±0.01mm for critical features | DIN ISO 2768-f |
| Max Part Size (Milling) | 1,200mm × 800mm × 600mm | — |
| Max Part Diameter (Turning) | ∅500mm | — |
| Surface Roughness | Ra 0.4μm – Ra 3.2μm (as-machined) Ra 0.2μm achievable with polishing | ISO 1302 |
| Inspection Equipment | Hexagon CMM, TESA Height Gauge Digital Bore Gauge, Optical Comparator Surface Roughness Tester (Mitutoyo) | NIST-traceable calibration |
| Lead Time | Prototype: 3–7 days Production: quoted per order | — |
| MOQ | No minimum — 1 piece to 10,000+ | — |
| Quality Docs | FAI, CMM Report, MTR, RoHS/REACH Declaration | — |
Core CNC Manufacturing Capabilities and Technologies
Our robust CNC manufacturing capabilities stem from mastering multi-axis technology and integrating diverse precision machining processes.
CNC Milling Services — 3-Axis, 4-Axis & 5-Axis
Our CNC milling capabilities cover the full spectrum from standard 3-axis planar machining to simultaneous 5-axis contouring — enabling complex geometries, undercuts, and multi-feature components to be completed in a single setup, eliminating repositioning error and reducing lead time.
3-Axis CNC Milling
Ideal for prismatic components with planar features, pockets, slots, and through-holes. Most cost-effective option for simple to moderately complex parts in aluminum, steel, and plastics. Standard tolerance: ±0.05mm; tight tolerance: ±0.01mm on critical features.
4-Axis CNC Milling
Adds a rotary A-axis for continuous indexing, enabling side-face machining and cylindrical contouring without re-fixturing. Ideal for camshafts, eccentric features, and parts requiring machining on multiple faces in a single operation.
5-Axis CNC Machining
Our 5-axis simultaneous machining capability is our primary competitive advantage for high-complexity components. By moving the cutting tool across 5 axes simultaneously, we achieve sculptured surfaces, compound angles, and deep-cavity features with superior surface finish and dimensional accuracy — critical for aerospace, medical, and precision industrial applications
CNC Turning Services — Precision Lathe & Live Tooling
Our CNC turning services produce precision cylindrical components — shafts, rods, discs, bushings, and threaded fasteners — with tight diameter tolerances and superior concentricity. Our turning centers are equipped with live tooling capability, enabling milling, drilling, and threading operations to be performed in the same setup as turning, reducing handling and cumulative error.
Standard CNC Turning
Single-point cutting tool removes material from rotating workpiece to produce OD/ID profiles, tapers, grooves, and threads. Max workpiece diameter: ∅500mm. Tolerance: ±0.01mm on diameter for precision applications.
Live Tooling & Mill-Turn
Combines turning and milling in one setup. Ideal for complex shaft components requiring cross-drilled holes, flats, and milled features — eliminating secondary operations and maintaining datum consistency throughout.
Additional CNC Machining Processes
|
Process |
What It Does |
Best For（应用场景） |
|
Drilling |
Creates cylindrical holes using rotating drill bits |
Fastener clearance holes, coolant passages, cross-drilling in shafts |
|
Grinding |
Abrasive wheel removes material for ultra-fine surface finish |
Bearing seats, sealing surfaces, Ra ≤0.4μm requirements |
|
Broaching |
Linear multi-tooth tool creates complex internal profiles |
Keyways, splines, internal gear profiles, non-circular bores |
|
Sawing |
Blade cuts stock to near-net shape before machining |
Raw material preparation, rapid cross-sectioning of bar stock |
|
Boring |
Enlarges and precisely finishes existing holes |
Precision bearing bores, hydraulic cylinder IDs, tight roundness specs |
|
Tapping |
Rotary tap cuts internal threads in pre-drilled holes |
Threaded bosses, blind holes, M2–M64 metric / UNC/UNF imperial threads |
Our CNC Machining Processing Technology
In turning, a lathe machine rotates a workpiece while a cutting tool removes material to create cylindrical shapes such as shafts, rods, and discs.
Milling involves rotating cutting tools with multiple teeth to remove material from a workpiece’s surface, creating complex shapes, slots, and holes.
Drilling uses rotating drill bits to create cylindrical holes in a workpiece, often for fasteners or to accommodate other components.
Grinding uses the friction on the grinding wheel to remove excess scrap or burrs from the material and to achieve a precise surface finish on the workpiece.
Broaching utilizes a specialized tool with multiple teeth to remove material in a linear motion, creating keyways, splines, and other complex shapes.
Sawing includes the use of saw blades to cut workpieces, often used in products such as sheet metal or plastic, through straight or curved cutting to complete the relevant product requirements.
Boring means the use of rotary cutting tools to enlarge an existing hole or to customize the exact inner diameter according to customer requirements.
It is processed by rotating a tap into a pre-drilled hole and used to produce an internal thread on the workpiece or in a custom form.
CNC Machining Applications Across Industries
Custom CNC Machined Parts are vital across mission-critical sectors where high reliability, precision, and material integrity are paramount.
Typical CNC Machined Parts：Structural brackets, impellers, sensor housings, avionics enclosures
Materials：Al 7075-T6, Ti-6Al-4V, SS 17-4PH
Key Requirements：±0.01mm, full traceability, AS9100 alignment
Typical CNC Machined Parts：Manifolds, valve bodies, sensor housings, powertrain components, battery enclosures
Materials：Al 6061-T6, SS 304, Brass
Key Requirements： PPAP documentation, high-volume consistency, IATF 16949 alignment
Typical CNC Machined Parts：Surgical instruments, implant fixtures, diagnostic device frames, imaging system components
Materials：SS 316L, Ti Grade 5, PEEK
Key Requirements：Ra ≤0.4μm, biocompatibility, full MTR traceability, ISO 13485 alignment
Typical CNC Machined Parts：Heat sinks, structural chassis, precision enclosures, camera housings
Materials：Al 6061-T6, SS 304
Key Requirements：Cosmetic anodizing, micro-tolerances, NPI speed
Typical CNC Machined Parts：Valve bodies, pump components, turbine housings, renewable energy brackets
Materials：SS 316L, 4140 Steel, Ti Grade 2
Key Requirements：Corrosion resistance, pressure ratings, NACE compliance
Typical CNC Machined Parts：Robotic arm joints, servo mounts, linear rail brackets, gearbox housings, conveyor plates
Materials：Al 6061, SS 303, PEEK
Key Requirements：Repeatable dimensions, anodized finishes, tight GD&T callouts
Our CNC Machines
At the heart of our manufacturing capabilities are our state-of-the-art CNC milling machines. Each machine is meticulously maintained and operated by our skilled technicians, ensuring every project meets the highest standards of excellence.
Our CNC Machining Processing Materials
Such as carbon steel, alloy steel, stainless steel, etc., commonly used for manufacturing mechanical parts and structural components.
We specialize in machining high-performance alloys, particularly Aluminum 6061 . As a core part of our Precision CNC Machining Services, we optimize material strength through integrated T6 heat treatment and precision milling.
Known for its excellent conductivity and thermal conductivity, commonly used for manufacturing electrical components and heat-conducting parts.
An alloy of copper and zinc, known for its good machinability and corrosion resistance, commonly used for manufacturing valves, pipes, and other components.
Known for its good wear resistance and compression strength, commonly used for manufacturing mechanical parts and bases.
Such as polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), etc., commonly used for manufacturing plastic parts and housings.
Our CNC Machining Parts Surface Finishes
We offer a wide range of surface finishes for CNC machined parts to meet your specific aesthetic and functional needs.
Parts are left with the original finish from the CNC turning process, showcasing visible tool marks. Suitable for functional prototypes and parts where surface appearance is not critical.
Provides a uniform matte or satin surface finish by blasting the part with fine glass beads. Ideal for aesthetic purposes and removing minor surface imperfections.
Electrochemical oxidation forming a protective layer on aluminum; provides corrosion resistance and decorative finish. Standards / Specs: MIL-A-8625 Type II | 5–25μm | Colors: natural, black, custom Applications: Aluminum parts, corrosion protection, decorative surfaces
Electrostatically applied and heat-cured to form a durable, wear- and corrosion-resistant layer. Ideal for structural assemblies, outdoor equipment, and industrial enclosures.
Adhesion Test: ASTM D3359
Thickness: 60–120 μm
Colors: Custom RAL
Electrochemical process that removes a thin layer to produce a smooth, shiny surface and improve corrosion resistance. Standards: ASTM B912 | Material removal: 20–40 μm | Ra improvement up to 50% Applications: Medical instruments, high-purity tubing, cosmetic stainless steel parts
Metal layer is deposited onto the part’s surface, offering additional protection and improved appearance. Commonly used to enhance durability, reduce friction, and enhance corrosion resistance.
Creates a uniform, linear texture on the part’s surface using abrasive belts or brushes. Used for aesthetic purposes, providing a satin finish with visible grain.
Chemical treatment that removes contaminants and enhances corrosion resistance of stainless steel.
Standards: ASTM A380 / AMS 2700 (removes free iron from stainless steel)
Applications: Medical 316L parts, food-grade stainless steel, marine components
Mechanical process that smooths and shines the part’s surface using abrasive compounds. Achieves a mirror-like finish, suitable for decorative purposes and components requiring high reflectivity.
Conversion coating for ferrous metals that provides a matte black finish, enhances corrosion resistance, and reduces glare. Standards: MIL-DTL-13924 Class 1 | Dimensional change <0.001" Applications: Ferrous parts, military & automotive components, anti-glare surfaces
Why Choose Qingdao Inside Industry for CNC Machining?
Precision, Efficiency, and Innovation for Your Manufacturing Needs.
Hexagon CMM achieves ±0.001mm measurement repeatability (NIST-traceable calibration). Every precision lot ships with a CMM inspection report.
Same quality system applies whether you order 1 prototype or 10,000 production parts. No setup fee penalty for low volumes.
Simultaneous 5-axis machining eliminates multi-setup repositioning error — critical for aerospace impellers, medical housings, and precision robotic components.
Written DFM feedback within 24-48 hours. Clients average 15-25% cost reduction and 20-30% lead time reduction per project by adopting our recommendations.
Full QMS documentation from raw material intake to final shipment. FAI, MTR, RoHS/REACH compliance docs included as standard.
20+ countries, 10+ years of international shipping. Our team handles all export documentation, customs classification, and logistics coordination.
