Quality Assurance for Custom Parts
STEP 01 — BEFORE PRODUCTION
Drawing and Requirement Review
Before production begins, our team reviews CAD files and drawings for manufacturability, material requirements, tolerances, critical dimensions, surface finish, and production considerations. This review helps define an inspection approach appropriate for the part and project.
Material Documentation
Material certificates can be provided for applicable materials when specified in the drawing, RFQ, or purchase order before production. Depending on the material and supplier documentation, records may include the material grade, heat or batch number, chemical composition, and mechanical properties.
STEP 02 — DURING PRODUCTION
Setup and In-Process Checks
Before and during machining, operators and quality personnel verify relevant setup conditions and specified part features according to the inspection plan. Checks may include workholding, key dimensions, threads, and other critical characteristics identified in the drawing.
In-Process Quality Control
In-process inspections are performed according to part requirements, production conditions, and agreed inspection criteria. This helps identify deviations early so that affected work can be reviewed before moving to the
next production stage.
STEP 03 — BEFORE SHIPMENT
Final Inspection and Documentation
Before shipment, finished parts are reviewed against the applicable drawing, inspection, surface finish, and packaging requirements. Dimensional inspection reports can be prepared according to the agreed inspection scope and may include critical dimensions, threads, geometric features.
Protective Packaging for Shipment
Packaging is selected according to part geometry, material, surface condition,
weight, quantity, and shipping method. Options may include individual protection, protective paper, foam, reinforced cartons, and wooden crates where appropriate to help protect parts during international transit.
Engineering Design Guides
Better quality starts with clear, manufacturable part requirements. Download our CNC machining and die casting design guides to review practical design considerations before requesting a quote.
CNC Machining Design Guide
Practical design considerations for CNC machined parts.
Die Casting Design Guide
Practical design considerations for die-cast parts.
Measurement and Inspection Equipment
Our inspection equipment supports dimensional measurement, optical verification, surface roughness testing, material-related testing, and other
project-specific quality checks. Inspection methods are selected according topart drawings, materials, critical features, surface requirements, and the agreed inspection scope.
Coordinate Measuring Machine (CMM)
Dimensional and geometric verification for applicable part features.
2.5D Optical Measurement System
Optical inspection for profiles, edges, holes, and visible features.
Salt Spray Corrosion Test Chamber
Applicable corrosion-resistance testing for materials and surface finishes.
Digital Height Gauge
Height, step, and feature-location checks for suitable parts.
Tensile Testing Machine
Mechanical testing for applicable materials or samples.
Roughness Tester
Verification of specified surface finish requirements。
Our Manufacturing Operations
At Hotean, we coordinate engineering review, production planning, inspection, finishing, packaging, and delivery through a controlled manufacturing process. Our manufacturing resources support CNC machining, die casting, sheet metal fabrication, 3D printing, and other custom parts requirements according to project scope.
What this means for your project:
• Coordinated Production Planning: Direct communication with the production team helps clarify requirements, schedules, and project priorities.
• Documented Quality Coordination: Inspection activities are planned around drawings, materials, critical features, and the agreed inspection scope.
• Confidential Project Support: NDA requirements and project file handling can be discussed before production begins.
Quality Documentation and Certifications
Quality and compliance requirements vary by material, process, and project. The documents shown below include quality management certification for our parent manufacturing entity, material compliance reports provided through certified material mills, and a manufacturing technology patent. Applicable documentation can be reviewed during quotation and production planning.
ISO 9001:2015 Quality Management System Certificate
Issued to Huizhou Tiantai, Hotean’s parent manufacturing entity.
303Cu Stainless Steel REACH Test Report
Provided by a certified material mill; applicable to the material and report scope shown.
303Cu Stainless Steel RoHS Test Report
Provided by a certified material mill; applicable to the material and report scope shown.
304F Stainless Steel REACH Test Report
Provided by a certified material mill; applicable to the material and report scope shown.
304F Stainless Steel RoHS Compliance Verification
Provided by a certified material mill; applicable to the material and report scope shown.
High-Efficiency CNC Die Casting Machine Patent
Issued to Huizhou Tiantai, Hotean’s parent manufacturing entity.
Need material certificates, compliance documents, or project-specific inspection reports? Include your requirements with your RFQ.
Quality Assurance FAQ
Can you support quality requirements specified in our drawing or RFQ?
Yes. Please include relevant tolerances, critical dimensions, material specifications, surface finish requirements, inspection reports, and documentation needs in your drawing or RFQ. We review the requirements before production to help define an appropriate inspection and documentation scope.
Can you provide material certificates and traceability documentation?
Material certificates can be provided for applicable materials when specified before production. Depending on the material, supplier documentation, and project requirements, records may include material grade, heat or batch number, chemical composition, and mechanical properties. REACH or RoHS-related documentation may also be reviewed for applicable materials or finishes when required.
What inspection reports and documents are available before shipment?
Available documentation may include dimensional inspection reports, CMM measurement reports, material certificates, surface finish checks, and certificates of conformance when specified. The available documents and inspection scope are agreed according to the part drawing, material, quantity, and project requirements.
How do you manage nonconforming parts or quality issues?
If a potential nonconformance is identified, affected parts are reviewed and contained before shipment where applicable. We work with the customer to clarify the requirement, assess the issue, and determine appropriate next steps, which may include rework, sorting, replacement, or corrective action according to the project agreement.
Can we request a supplier or third-party quality audit?
Supplier qualification, on-site visits, virtual reviews, or third-party audit requests can be discussed in advance. Access, documentation review, safety requirements, and confidentiality arrangements are coordinated according to the audit scope and project requirements.
How do you manage design changes from prototype to repeat production?
Part revisions, approved drawings, material changes, and inspection requirements are reviewed before repeat production. When a design or process change is required, the impact on manufacturing, quality, documentation, and delivery is evaluated before implementation.
START YOUR PROJECT
Upload Your CAD Files for a Manufacturing Quote
Send your drawings or 3D models for engineering review, material and process recommendations, and project-specific pricing for prototypes and low-volume production parts.
SUPPORTED CAD FORMATS
Upload CAD Files for a Quote
STEP
STP
IGS
IGES
PRT
SLDPRT
SAT
X_T
Engineering Review Material & Finish Options Global Shipping Support