Precision Sourcing & Supply Stability for Global Manufacturers
Lower your bill of materials (BOM), secure qualified Chinese manufacturing capacity, and safeguard production schedules. We provide end-to-end engineering review, factory auditing, sample pilot runs, and lot-by-lot quality assurance for precision parts and raw materials.
Direct communication with factory toolmakers, eliminating translation gaps in tolerances, finishing, and metallurgy.
Batch-specific 3.1 chemical & mechanical test certificates (MTR), spectrometry, and salt spray test verification.
Built to Resolve the Strategic Vulnerabilities of Industrial Purchasing
Escalating BOM & Component Costs
Local domestic machining, casting, and fabrication costs continue to erode manufacturing profit margins and competitive bidding viability.
Inconsistent Batch Quality & Defects
Receiving out-of-spec dimensions, substandard metallurgical alloy grades, or defective assemblies can shut down your assembly lines.
Lead Time Drift & Production Delays
Unmonitored production schedules across multiple Chinese tier-2 and tier-3 component vendors lead to uncoordinated deliveries.
Fragmented Multi-Supplier Logistics
Managing dozens of individual supplier purchase orders, separate shipping containers, and customs files spikes overhead.
Manufacturing Disciplines & Component Capabilities
We connect industrial manufacturers directly with specialized ISO-certified production facilities across China for customized drawings, OEM specifications, and mass production runs.
Precision Machining & CNC Turning
3-axis, 4-axis, and 5-axis CNC milling, Swiss turning, and EDM for high-tolerance mechanical parts, shafts, manifolds, and custom fittings.
- Materials: Aluminum, Stainless, Brass, Titanium, PEEK
- Tolerances: Down to ±0.005 mm
- Finishing: Anodizing, Passivation, Black Oxide, Nickel
Sheet Metal, Stamping & Laser Cut
Progressive die stamping, laser cutting, robotic welding, and CNC brake press bending for structural brackets, enclosures, and strut channel systems.
- Materials: Carbon Steel (Q235/Q355), SPCC, SS304/316
- Processing: Continuous Progressive Die & Heavy Press
- Finishing: Hot-Dip Galvanized, Powder Coat, E-coat
Die Casting & Plastic Tooling
Custom mold engineering for high-pressure aluminum/zinc die casting and technical plastic injection molding for industrial housings and assemblies.
- Molds: Steel S136, H13, NAK80 hardened tool steels
- Resins: ABS, Polycarbonate, Nylon (PA66-GF), POM
- Services: Mold flow simulation, DFM reports, T1 samples
Industrial Fasteners & Hardware
Standard and custom cold-headed bolts, strut channel spring nuts, clamps, threaded rods, and specialized fasteners according to ISO, DIN, and ANSI.
- Grades: 4.8, 8.8, 10.9, 12.9, A2-70, A4-80
- Types: Channel nuts, U-bolts, flange bolts, rivets
- Plating: Geomet, Dacromet, Zinc flake, HDG
Raw Materials & Chemical Compounds
Sourcing of industrial raw materials, polymer granules, masterbatches, intermediate chemicals, pigments, and specialty industrial ingredients.
- Documentation: Full COA, SDS, REACH, and RoHS
- Packaging: ISO tanks, IBC totes, 25kg drums, bulk bags
- Logistics: Hazardous cargo compliance & ocean transport
Sub-Assembly & Custom Kitting
Consolidating multi-component kits, mechanical sub-assemblies, and specialized industrial packaging in our Suzhou operations hub before shipping.
- Consolidation: Merge 5-20 factory outputs into 1 container
- Kitting: Barcode labeling, assembly instructions, hardware bags
- Testing: Functional sub-assembly testing before export
From Engineering Drawings to Your Assembly Line
A disciplined 6-stage roadmap designed to eliminate engineering ambiguity, protect lead times, and guarantee mass-production repeatability.
RFQ & Technical DFM Review
Submit your CAD/STEP drawings, material specs, and BOM. Our engineers perform a Design for Manufacturability (DFM) review and target factory shortlisting.
Factory Audits & Cost Modeling
We evaluate and audit 3–5 qualified Chinese factories, comparing raw material costs, tooling quotes, capacity, and ISO certifications in a side-by-side matrix.
Tooling & Prototype Golden Sample
Molds and tooling are built with verified steel certificates. First Article Inspection (FAI) prototypes are measured and shipped to your engineering team for sign-off.
Pilot Batch & Production Control
We oversee a controlled pilot production run, verifying line cycle stability, automated fixture repeatability, and defect tracking before full mass production.
Lot-by-Lot Pre-Shipment Audit
Our quality engineers conduct on-site AQL sampling, dimensional CMM verification, tensile checks, and export packaging testing prior to invoice release.
Consolidation & DDP Delivery
Consolidate components from multiple supplier plants at our Suzhou warehouse into unified full container loads (FCL) delivered direct to your facility.
How We Protect Manufacturing Production Standards
Our on-site engineering and quality inspection teams operate as your local quality department in China, verifying materials, tolerances, and surface integrity prior to dispatch.
| Inspection Gate | Technical Focus | Inspection Method | Deliverable to Client |
|---|---|---|---|
| 01. Supplier Audit & Tooling | Factory machinery capability, ISO compliance, mold lifespan | On-site factory visit, audit checklist, production capacity check | Full Supplier Audit Report |
| 02. First Article Inspection (FAI) | Critical dimensions, surface roughness, fit & tolerance verification | CMM 3D scanning, micrometers, optical comparator, GO/NO-GO gauges | Dimensional FAI Dossier + Golden Sample |
| 03. Material Verification | Alloy chemistry, tensile strength, hardness (HRC/HRB), coating thickness | Spectrometer XRF test, salt spray test, coating thickness gauge | Material Test Report (MTR / 3.1) |
| 04. During Production (DUPRO) | Cycle times, scrap rate, inline defect tracking, assembly alignment | Random sampling at 30%–50% manufacturing milestone completion | DUPRO Status & Timeline Alert |
| 05. Pre-Shipment Inspection (PSI) | Final packaging, carton drop test, barcoding, batch quantity count | AQL Standard Level II (Major 1.0 / Minor 2.5) sampling standard | Certified Pre-Shipment Release Certificate |
We negotiate directly with factory technical leaders, avoiding inflated broker markups.
Legally enforceable non-disclosure, non-use, and non-circumvention contracts governed by Chinese law.
Explicit contractual ownership of all custom tooling, dies, patterns, and molds with relocation rights.
Ocean, air, and rail freight handled end-to-end with all customs clearance and door delivery managed.
One Single Point of Contact for All Your Chinese Vendors
Manufacturing complex products often requires sourcing cast housings from Ningbo, stamped brackets from Changzhou, precision CNC pins from Kunshan, and custom fasteners from Jiaxing.
Instead of juggling 10 separate contracts, international wires, and shipment manifests, Tommysourcing acts as your integrated supply chain coordinator in China:
One master contract with Tommysourcing streamlines your accounting and cross-border payment operations.
Staged intake at our Suzhou facility allows comprehensive component fit testing and full-container loading to reduce freight overhead by up to 35%.
Standardized inspection criteria and documentation applied across all tier-1 and tier-2 vendor plants.