China CNC Machining Manufacturer — AS9100D & ISO 13485 Certified OEM/ODM Factory

Titanium Structural Components for Aerospace and Defense

Titanium is one of the most rewarding metals to machine well and one of the most punishing to machine poorly. MID Precision has spent more than three decades developing the tool paths, fixturing strategies, coolant management, and operator know-how that turn Ti-6Al-4V (Grade 5) and Ti-6Al-4V ELI (Grade 23) titanium into flight-quality aerospace structural components, defense hardware, and demanding industrial parts. In the past 12 months, our aerospace cell completed 14,200 titanium structural parts, with zero non-conformance returns from our top three aerospace customers.
Typical titanium parts we produce include aircraft structural brackets and ribs, UAV airframe nodes, satellite payload mounts, defense subsystem housings, missile guidance hardware, and high-strength fasteners. These parts share a common manufacturing challenge: extreme strength-to-weight requirements, deep load-bearing cavities, contoured 3D outer surfaces, and ultra-thin walls that must remain straight and stress-free after machining.
Our solution combines AS9100D-certified planning with hands-on capability. We use simultaneous 5-axis CNC milling on our in-house 9-machine 5-axis cell to access undercuts and complex contours in a single setup, eliminating the cumulative error stack-up that kills titanium tolerances on lesser equipment. We control heat with premium carbide tooling specifically selected for titanium, high-pressure through-tool coolant, and in-process on-machine probing to compensate for tool wear before it impacts the part. Finished bearing surfaces are ground or honed when required to achieve Ra 0.2 µm or better.
Every titanium order from MID Precision ships with mill heat-number traceability, hardness verification, Mitutoyo CMM dimensional reports, and a full AS9102 First Article Inspection Report on initial release.
If you are designing a flight-critical structural component or a defense subsystem and your last Chinese CNC machining manufacturer delivered parts that warped on the inspection plate, MID Precision is the second opinion your program has been searching for. We routinely hold ±0.005 mm on critical features and ±0.001 mm on micro-precision details, and we ship globally to the United States, Germany, Sweden, the United Kingdom, Israel, and Southeast Asia with full export documentation and ITAR-aware project handling for non-controlled programs.

Stainless Steel Precision Shafts and Connectors

Precision shafts and connectors are the motion-transmission backbone of robotics, medical devices, automation systems, and high-performance industrial equipment. MID Precision manufactures custom stainless steel shafts, dowels, threaded connectors, hydraulic couplings, and multi-step concentric components in 303, 304, 316L, 17-4 PH, 15-5 PH, 440C, and 465 stainless steel grades. Last year, this product family represented 23% of our total parts shipped — approximately 120,000 precision shafts and connector components across 280 unique part numbers.
The manufacturing challenge with precision shafts is straightforward to describe and difficult to deliver: extreme length-to-diameter ratios (often 20:1 or higher), multi-step concentric features that must remain coaxial within microns, micro-tolerance dimensional requirements across the full length, and surface finishes that often need to reach Ra 0.2 µm through grinding or polishing. Any runout in the workpiece during machining translates directly into wobble, vibration, and premature wear in your end product.
Our approach starts with the right machine for the job. Long, slender shafts run on Swiss-style sliding-headstock CNC lathes that support the workpiece within millimeters of the cutting tool, eliminating deflection — work we run in-house and, for high-volume Swiss-turning programs, route to dedicated audited partners under our quality system. Multi-feature shafts move to Doosan turn-mill compound centers and our in-house CNC lathes that finish outside diameter turning, drilling, milling, and threading in a single setup, eliminating fixture-induced concentricity error. Final precision is achieved with centerless or cylindrical grinding when surface or roundness requirements demand it.
Every precision shaft order at MID Precision is supported by full in-process inspection including digital indicator runout verification and final-stage Mitutoyo CMM measurement of all critical concentricity, parallelism, and total runout callouts. Surface finish is verified with calibrated Mitutoyo metrology at first-piece, mid-run, and final lot inspection. For medical-grade shafts, we add passivation per ASTM A967 and provide passivation certificates with each shipment. Whether you are sourcing a 5-piece prototype lot of surgical instrument shafts or a 5,000-piece production run of automation linear motion components, MID Precision delivers the concentricity and consistency your assembly needs — and we will ship the inspection data with the parts, not three weeks later when your QA team asks for it.

Complex 5-Axis Geometry Parts

Some parts simply cannot be made by 3-axis machining at any cost. Undercuts, swept surfaces, intersecting bores at compound angles, deep pockets with narrow access — these features demand simultaneous 5-axis CNC machining, and that is where MID Precision has built our reputation among engineering buyers worldwide. A 5-axis machining job is fundamentally different from a 3-axis job — the CAM strategy has to manage tool tilt to avoid collisions, workholding has to remain accessible from all five sides without moving, and the operator has to verify a far more complex motion path before the cycle starts. We invested heavily in 5-axis simultaneous equipment specifically because our customers were asking for parts that 3- and 4-axis shops in China simply could not deliver. Our in-house 5-axis cell consists of 9 simultaneous 5-axis CNC machining centers, configured across small-part platforms (≈500 mm travel for surgical robotic and precision optical work) and larger platforms (600 mm+ travel for aerospace structural and semiconductor chamber parts). All 5-axis programming is performed in Mastercam and Siemens NX CAM, running on a 4-station programming network, with full Vericut machine simulation verification before any cycle starts. In the past 12 months, this cell completed more than 47,000 5-axis parts across 380 unique part numbers.
Typical 5-axis parts we manufacture include monolithic aerospace structural brackets with integral features on multiple faces, surgical robotic articulation joints, optical mounting structures with critical angular references, semiconductor vacuum chamber components with cross-bored gas channels, and impeller-style flow components. These parts share a common attribute: they would require five or six separate fixturings on a 3-axis machine, accumulating tolerance error at each setup. On a true 5-axis simultaneous machine, the part is fixtured once, machined complete, and inspected directly — collapsing the cumulative geometric error stack to the precision of a single zero-point reference.
MID Precision pairs our 5-axis hardware with experienced 5-axis CAM programmers who understand collision avoidance, tool length compensation, and feed-rate optimization for complex motion paths. We verify every program through full machine simulation in Vericut before it touches a real workpiece. The result is 5-axis parts that match the print, hold ±0.005 mm tolerance, and arrive ready for assembly — without rework, without scrap surprises, and without the missed delivery dates that have made some buyers afraid to source 5-axis work from a Chinese supplier.

Micro-Tolerance Small Metal Parts

Some of the most challenging parts MID Precision delivers measure less than 25 mm in any direction. Minimally invasive surgical instruments, semiconductor inspection probes, precision optical hardware, and micro-mechanical assemblies all depend on small metal parts machined to extreme tolerances — and that is a specialty market most CNC shops simply cannot serve.
Our micro-machining capability is anchored by five FANUC Robodrill α-D21MiA and α-D21MiB Plus high-speed precision machining centers — Japan's reference platform for micron-level positioning repeatability and the workhorse of precision electronics, surgical instrument, and small-feature aluminum production worldwide. These machines run with thermal-stabilized spindle systems, glass-scale feedback on critical axes, and full integration with our Mitutoyo metrology lab. Two of the five Robodrills are configured with 4th-axis rotary tables for compound-angle micro features, and our small-part 5-axis platforms cover any geometry that exceeds 3+1 axis capability. Inspection is performed on Mitutoyo three-coordinate measuring machines, Mitutoyo IM-series optical comparators (2D vision systems with sub-micron measurement repeatability), and Mitutoyo precision height gauges. We routinely machine features below 0.5 mm in diameter, hold ±0.001 mm on critical dimensions, and achieve surface finishes below Ra 0.2 µm without secondary polishing.
The challenges in micro-precision work go well beyond simply scaling down a normal job. Tool deflection at micro scale is unforgiving — a 0.3 mm end mill has roughly 1% of the lateral stiffness of a 3 mm end mill, which means feeds, speeds, and depth of cut have to be recalculated, not just reduced. Heat dissipation has to be managed at the level of individual chips. Workpiece handling has to be cleanroom-grade because a single particulate or microscopic burr can scrap a part. Final inspection has to be performed under optical magnification because the human eye cannot resolve the features at full size.
We have built our process around those realities. Our micro-machining cell operates in a temperature-controlled environment held at 20 ± 1 °C, our operators are trained specifically on small-part handling and inspection, and 100% in-process inspection is standard rather than optional. Materials commonly machined in this cell include 316L and 465 stainless steel, Grade 23 ELI titanium, nitinol, PEEK GF30, and beryllium copper.
For medical OEMs developing the next generation of minimally invasive surgical tools, for semiconductor companies inspecting sub-micron features, and for precision optics companies aligning lens stacks within microns, MID Precision can match — and often exceed — the work you would otherwise expect from Swiss or German micro-machining suppliers, at substantially better commercial terms and equally rigorous documentation.

Custom Threaded and Assembly Parts

The unglamorous reality of industrial manufacturing is that a small percentage of failed parts are spectacular fractures and a large percentage of failed parts are threads that backed out, fasteners that cross-threaded, or mating features that fit on the first piece but not on the fiftieth. MID Precision takes assembly fit and thread integrity seriously because our customers have learned that we do. In the past 12 months, we shipped more than 89,000 threaded components across 210 unique part numbers, with a documented field-failure rate of zero on critical thread integrity.
We manufacture custom threaded components and mating assembly parts across a wide range of industries: automotive powertrain fasteners, aerospace structural bolts, medical implant trial hardware, industrial pneumatic and hydraulic fittings, custom captive fasteners, and a wide variety of non-standard thread profiles that no off-the-shelf supplier carries.
We machine threads three ways depending on the application: single-point threading on a CNC lathe (best for low-volume, non-standard, or large-diameter threads), thread milling on a CNC mill (best for hardened materials, very large or very small diameters, and critical aerospace work), and thread rolling for high-volume production work where the rolled-thread grain structure improves fatigue life. Our process engineers will recommend the right thread-generation method based on your material, your volume, and your performance requirements — and we will explain the reasoning honestly so you can make an informed engineering decision. Every threaded part order at MID Precision is verified with a thread plug or thread ring gauge appropriate to the specification (UN, UNJ, UNF, metric M, NPT, BSPP, BSPT, or custom). For aerospace work, we verify thread profile per ANSI/ASME B1.1 or B1.13M with optical comparator inspection. For high-volume work, we sample threads with statistical process control to catch tool wear before it causes a reject lot.
Mating assembly fit is verified by physical assembly of the first article whenever possible. When two parts have to fit together with a specific clearance or interference, we manufacture and inspect them as a matched set, not as independent pieces. That single discipline — verifying assemblies, not just individual parts — has eliminated more field returns for our customers than any other process improvement we have made.