Precision Metal Components for Global OEM
ISO 9001:2015 · Heavy-Gauge Fabrication to 20 mm · ±0.005 mm CNC Tolerance · AWS D1.1 Structural Welding · Hexagon CMM Verified · Qingdao, China — Direct Export
From our production facility in Qingdao, Shandong Province, Qingdao Inside Industry Co., Ltd. manufactures high-precision custom metal components for Tier-1 and Tier-2 OEM supply chains across Europe, North America, and Southeast Asia.
Our integrated in-house capabilities span 5-axis CNC machining, sheet metal fabrication, progressive die stamping, TIG/MIG robotic welding, and laser cutting — all operating under ISO 9001:2015 quality management with Hexagon CMM dimensional verification and full material traceability.
We hold machining tolerances to ±0.005 mm on TRUMPF-equipped production lines, and we support DFM (Design for Manufacturability) consultation from prototype through high-volume production. Below are the seven industries where our engineering and production teams have the deepest process knowledge
Aerospace procurement engineers require verifiable
dimensional accuracy, not assurances. Flight-critical components demand full
material traceability, controlled process environments, and documented first
article inspection — before a supplier conversation goes further.
From our Qingdao production facility, we machine aerospace
structural components and precision brackets in titanium (Ti-6Al-4V), aluminum
7075-T6, and nickel superalloys including Inconel 625. Our 5-axis CNC machining
centers maintain tolerances to ±0.005 mm on complex geometries, including
thin-wall structures as narrow as 0.8 mm.
Sheet metal fabrication for airframe secondary structures and
ground support equipment is performed using TRUMPF fiber laser cutting and CNC
press brake forming, with TIG welding under qualified procedures. All aerospace
work is supplied with CMM inspection reports generated on our Hexagon
coordinate measuring machine, material test reports (MTRs) with heat and lot
numbers, and first article inspection (FAI) documentation.
Spec | Value |
Core Materials | Ti-6Al-4V, Aluminum 7075-T6, Inconel 625/718, 15-5 PH Stainless Steel |
Machining Tolerance | ±0.005 mm (5-axis CNC); ±0.1 mm (sheet metal laser) |
Max Part Size | 1,200 × 800 × 600 mm (5-axis CNC) |
Min Wall Thickness | 0.8 mm (aluminum); 1.0 mm (titanium) |
Surface Finishes | Hard anodize Type III, Alodine 1200, MIL-spec primer+paint, passivation |
Quality Docs | MTRs with heat numbers, FAI, CMM reports, PPAP Level 3 available |
High-volume automotive stamping demands dimensional repeatability across thousands of production cycles. European and North American OEM procurement requires PPAP documentation, salt spray test compliance, and cost-per-unit efficiency supported by optimized material nesting — not just a price sheet.
Qingdao Inside Industry supplies progressive die stamped structural brackets, reinforced chassis components, and body hardware to Tier-1 and Tier-2 automotive suppliers shipping into European OEM lines. Our stamping line handles sheet gauges from 0.5 mm to 8 mm in SPCC, SPHC, high-strength steel, and aluminum, with material nesting optimization reducing scrap rates on high-volume runs.
Robotic MIG welding cells handle multi-part chassis assemblies with jig-controlled fixturing, ensuring consistent joint geometry across production batches. All powder-coated and e-coated finishes are validated against 500-hour salt spray test requirements per ISO 9227. PPAP Level 3 documentation is available on request.
Spec | Value |
Core Materials | SPCC, SPHC, DP600/DP800 high-strength steel, 5052-H32 aluminum |
Sheet Gauge Range | 0.5 mm – 8 mm (laser cutting); 0.8 mm – 4 mm (progressive die) |
Stamping Press Capacity | Up to 400T progressive die |
Salt Spray Compliance | 500 hrs (ISO 9227); e-coat and powder coat validated |
Quality Docs | PPAP Level 3, FMEA support, CMM dimensional reports |
Deep Draw Capability | Cylindrical and non-circular: fuel housings, oil pans, battery enclosures |
Precision Metal Components for Consumer Electronics & Hardware
DFM from Prototype to Mass Production
Consumer product buyers need cosmetic surface finishes that survive retail shelf scrutiny, structural integrity at minimum material weight, and a manufacturing partner who can flag DFM issues at the prototype stage — before tooling costs are committed.
We fabricate precision sheet metal enclosures, battery contact assemblies, structural brackets, and decorative hardware for consumer electronics and household appliances. Our DFM review process typically identifies 3–5 design adjustments per prototype that reduce tooling complexity or material consumption before first-off production.
In-house surface finishing includes sandblasting, Type II anodizing, Type III hard anodizing, and powder coating, enabling cosmetically finished parts without third-party finishing lead time. For smart device enclosures, we hold form tolerances to ±0.05 mm on CNC-machined aluminum housings.
Spec | Value |
Core Materials | 6061-T6 / 7075-T6 Aluminum, 304 SS, SGCC galvanized steel |
Enclosure Tolerance | ±0.05 mm (CNC-machined Al housing) |
Surface Finishes | Type II anodize, Type III hard anodize, powder coat, sandblast, brushed |
Prototype Lead Time | 7–12 working days for first-off prototype |
DFM Support | Provided at no charge; written DFM report on all new tooling projects |
MOQ | From 1 piece (prototype); 500+ pcs (stamping production) |
Utility-scale energy infrastructure requires fabricated metal components that outlast 20-year field service cycles in corrosive coastal and offshore environments. Procurement teams need weld procedure qualification records, corrosion test data, and documented material certifications — not just commercial promises.
From our Qingdao facility, we fabricate heavy-gauge structural steel assemblies for solar racking systems and wind turbine internal components, as well as precision CNC machined valve bodies, connector fittings, and pressure housings for oil and gas infrastructure. We process duplex stainless steel (2205) and super duplex (2507) for offshore-grade corrosion resistance, and we provide hot-dip galvanizing coordination for carbon steel structural components.
Structural welding is performed under qualified WPS procedures (AWS D1.1 / ISO 3834). NDT options include visual inspection, dye penetrant testing (DPT), and magnetic particle inspection (MPI). ASTM G48 pitting corrosion testing is available for duplex stainless applications.
Spec | Value |
Core Materials | Duplex SS 2205/2507, Carbon steel Q355, 316L SS, Galvanized SGCC |
Structural Weld Standards | AWS D1.1, ISO 3834-2, WPS qualified procedures |
NDT Options | VT, DPT, MPI (on request) |
Corrosion Protection | Hot-dip galvanizing, epoxy powder coat, ASTM G48 test available |
Max Weldment Size | Up to 3,000 mm length (structural frame welding) |
CNC Machined Parts | Valve bodies, connectors, flanges — high-pressure alloys |
Industrial equipment manufacturers need machined shafts, gears, bearing housings, and structural frames that hold tight tolerances under cyclic mechanical loading. Procurement engineers look for verified hardness specs, surface finish Ra values, and dimensional compliance reports — not general capability claims.
We supply CNC turned and milled shafts, worm gears, transmission components, and wear-resistant parts in alloy steels (42CrMo4, 40Cr), cast iron, and hardened tool steel to industrial OEMs across Europe and Asia. Machined components are supplied with surface roughness reports (Ra 0.8 – Ra 3.2 μm per specification) and Hexagon CMM dimensional verification.
For equipment frames and enclosures, our heavy-gauge sheet metal fabrication line handles material up to 20 mm carbon steel plate using fiber laser cutting and CNC press brake forming. High-strength structural welding is performed in qualified fixture setups with distortion control procedures.
Spec | Value |
Core Materials | 42CrMo4, 40Cr alloy steel, cast iron, tool steel (SKD11), 304/316 SS |
Turning Diameter | Up to Ø 600 mm (CNC turning center) |
Surface Roughness | Ra 0.8 – Ra 3.2 μm (per drawing spec) |
Heavy Plate Cutting | Up to 20 mm carbon steel (TRUMPF fiber laser) |
Gear & Shaft Tolerance | IT6 – IT7 (ISO tolerance grades) |
Quality Docs | CMM reports, hardness test records, surface roughness certificates |
Medical device OEMs require more than dimensional compliance. They need a supply chain that can document every material lot, every process step, and every inspection result — because regulatory submission depends on it. Surface finish, contamination control, and biocompatibility of process chemistry are non-negotiable.
We manufacture precision CNC machined instrument components, surgical housings, and diagnostic equipment enclosures in 316L stainless steel, 304 stainless steel, and Grade 5 titanium (Ti-6Al-4V). All stainless steel stock is sourced from certified mills and supplied with full MTRs including chemical composition, mechanical properties, and heat/lot number traceability.
TIG welding of stainless steel medical enclosures is performed using argon back-purging to prevent oxidation, with inter-pass temperature control. Electropolishing and passivation are coordinated through qualified vendors with process certification. Surface roughness is measured and reported to Ra 0.4 – Ra 0.8 μm for instrument-contact surfaces. All production runs include a CMM first article report on critical dimensions.
Spec | Value |
Core Materials | 316L SS, 304 SS, Ti-6Al-4V (Grade 5), PEEK (coordinate procurement) |
Surface Roughness | Ra 0.4 – Ra 0.8 μm (instrument-grade, measured & reported) |
Welding Process | TIG with argon back-purge; inter-pass temperature controlled |
Surface Treatment | Electropolishing, passivation (ASTM A967), bead blast |
Traceability | Full MTRs with heat numbers, chemical & mechanical certs |
Compliance | ISO 9001:2015 QMS; RoHS/REACH compatible; PPAP available |
Robotics engineers iterate fast. They need a fabrication partner who can turn around first-off prototypes in under two weeks, provide DFM feedback on structural panel designs, and then scale to series production without retooling or tolerance drift. Weight optimization and modularity are engineering priorities, not afterthoughts.
We manufacture structural robot body panels, end-effector mounting hardware, motor housing enclosures, and precision CNC machined joints for collaborative and industrial robotic systems. Lightweight designs in 6061-T6 and 7075-T6 aluminum are standard; we also machine carbon fiber-reinforced components with aluminum inserts on request.
Our DFM review for robotics clients typically addresses wall thickness uniformity for consistent anodizing, thread insert placement for serviceability, and bend radius optimization for sheet metal formed enclosures. Prototype lead times run 7–10 working days for CNC machined parts and 10–15 working days for sheet metal assemblies with surface finishing.
Spec | Value |
Core Materials | 6061-T6 / 7075-T6 Aluminum, 304 SS, carbon steel, CFRP inserts |
Prototype Lead Time | 7–10 working days (CNC); 10–15 working days (sheet metal + finish) |
Enclosure Tolerance | ±0.05 mm (CNC machined); ±0.15 mm (formed sheet metal) |
Surface Finishes | Type II anodize, powder coat, bead blast, brushed + clearcoat |
Scalability | Prototype (1 pc) → Series (10,000+ pcs) without supplier change |
DFM Report | Written DFM provided before tooling commitment |
