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Manufacturing Quality Assurance & Inspection

At TigerHubs, we integrate manufacturing quality assurance and quality control into every stage of custom parts production. Across six manufacturing processes, we focus on dimensional accuracy, material conformity, and consistent part quality to help reduce defects, minimize rework, and ensure parts meet your engineering specifications—from one-off prototypes to production orders.

Dimensional Inspection Report
CMM Inspection Report
First Article Inspection Report (FAIR)
Material Test Certificate

Certificate of Conformance (CoC)RoHS / REACH DocumentationPPAP DocumentationSurface Finish Inspection Report

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Quality Control at Every Manufacturing Stage

Quality control begins before production and continues until your parts are ready for shipment. At TigerHubs, our manufacturing quality control process is designed to identify potential issues early, monitor critical production characteristics, and verify parts against agreed requirements. By integrating inspection checkpoints throughout production, we help minimize defects, reduce costly rework, and improve consistency from prototypes to production batches.

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Engineering & DFM Review

Before manufacturing begins, our engineering team reviews your CAD files and technical drawings to identify potential manufacturing challenges. Critical dimensions, material requirements, part geometry, and design specifications are evaluated to address potential quality risks before they affect production.

Incoming Material Inspection

Incoming materials are checked against the agreed specifications before entering production. Material identification, relevant supplier documentation, and applicable incoming acceptance requirements are reviewed to help prevent incorrect or nonconforming materials from entering the manufacturing process.

First Article Inspection

Initial manufactured parts are inspected against approved engineering requirements before proceeding with larger production quantities. First article inspection focuses on specified critical dimensions, features, and applicable functional requirements to identify process deviations at an early stage.

In-Process Quality Control

Throughout manufacturing, in-process quality inspection helps monitor critical characteristics and process stability. Inspection checkpoints and sampling frequencies are determined according to part complexity, production volume, and project-specific quality requirements, allowing deviations to be identified before they affect subsequent operations.

Final Quality Inspection

Before shipment, completed parts undergo final quality inspection against the agreed acceptance criteria. Applicable dimensional, visual, quantity, and finishing requirements are checked, along with packaging readiness, to help ensure that parts are prepared for delivery in accordance with the order specifications.

Manufacturing Quality Standards & Tolerances

Different manufacturing processes have different dimensional capabilities. At TigerHubs, we evaluate manufacturing tolerances against part geometry, material properties, and applicable industry standards to help customers establish realistic accuracy requirements. From precision CNC machined components to large metal castings, our manufacturing solutions support both general tolerances and tighter tolerances on critical features, helping you balance dimensional accuracy, part functionality, and production costs.

Manufacturing Process	Typical Tolerance Reference	Applicable Standards
CNC Machining	±0.10 mm general; down to ±0.025 mm for selected precision features	ISO 2768, ISO 286, ISO 1101
Injection Molding	±0.10 mm typical; down to ±0.05 mm for selected features	ISO 20457
Sheet Metal Fabrication	±0.10–0.20 mm for selected laser-cut features; formed-part tolerances vary	ISO 2768, ISO 9013
Metal 3D Printing	±0.10–0.20 mm for selected LPBF features; size-dependent variation applies	ISO/ASTM 52902 for system capability assessment
Die Casting	Approximately ±0.10–0.30 mm on selected features, depending on part size and geometry	ISO 8062 series
Sand Casting	Casting tolerance grade and nominal dimensions determine achievable accuracy	ISO 8062 series

Quality Inspection Equipment & Measurement Technology

TigerHubs' quality inspection capabilities cover dimensional measurement, optical inspection, and material identification across custom manufacturing projects. By selecting measurement technologies suited to different part features, materials, and geometries, we help customers verify critical specifications and reduce the risk of dimensional or material-related errors.

Coordinate Measuring Machine (CMM)

Our coordinate measurement technology enables precise 3D inspection of complex machined features. Using contact probes, we can measure critical dimensions, hole locations, mating features, and relevant geometric tolerances in accordance with engineering drawings.

Measurement Applications: 3D Dimensions · Hole Positions · GD&T Features · Complex Geometries

Optical Vision Measuring System

Optical measurement technology enables the inspection of small features, profiles, edges, and hole patterns without direct probe contact. It is particularly useful for delicate components and features that are difficult to inspect with conventional contact gauges.

Measurement Applications: 2D Profiles · Edge Dimensions · Hole Spacing · Small Features

Handheld XRF Alloy Analyzer

Handheld XRF analysis provides rapid, non-destructive screening of applicable metal alloys by identifying their elemental composition. This helps distinguish material grades and reduce the risk of alloy mix-ups in metal component manufacturing.

Measurement Applications: Alloy Identification · Elemental Analysis · Material Grade Screening

Precision Height Measuring System

Height measuring instruments support dimensional checks on components positioned against a reference surface. They are suited to evaluating part heights, step differences, and selected relative positions, providing practical verification for common precision manufacturing features.

Measurement Applications: Height Dimensions · Step Heights · Relative Positions · Datum-Based Checks

Tool Presetting & Measurement System

Tool presetting technology supports the measurement and preparation of cutting tools before machining. Accurate tool length and diameter settings help reduce setup-related errors and support more consistent machining operations.

Measurement Applications: Tool Length · Tool Diameter · Tool Offset Setup · Machining Preparation

Quality Documentation & Inspection Reports

TigerHubs supports project-specific quality documentation to help customers verify manufactured parts against agreed specifications. From dimensional inspection reports to material certificates and production approval documents, we help customers define the records needed for engineering validation, incoming acceptance, and supplier quality reviews. Documentation requirements can be reviewed during quotation to align report scope, inspection criteria, and project expectations before manufacturing begins.

Dimensional Inspection Report

Documents measured dimensions against specified drawing requirements, including nominal values, tolerances, actual measurements, and acceptance results.

CMM Inspection Report

Provides recorded measurements of selected three-dimensional features, including critical positions, geometric relationships, and applicable GD&T requirements.

First Article Inspection Report (FAIR)

Records inspection results for an initial production part or defined sample against the approved engineering requirements. The report scope and format can be specified according to project needs.

Material Test Certificate (MTC)

Provides applicable material supplier or mill certification information, such as material grade, chemical composition, and mechanical test results where available and required.

Certificate of Conformance (CoC)

A Certificate of Conformance provides a formal declaration that the identified parts or batch meet the specified purchase order, drawing, and applicable acceptance requirements.

RoHS & REACH Documentation

Relevant material declarations and supporting supplier documentation can help customers assess applicable RoHS and REACH requirements for their products and markets.

PPAP Documentation

Production Part Approval Process documentation may include dimensional results, material records, process-related evidence, and other customer-specified submission elements, depending on the agreed PPAP level.

Surface Finish Inspection Report

Records applicable surface measurements, such as roughness, coating thickness, or other agreed finishing characteristics, together with the relevant acceptance criteria.

Frequently Asked Questions

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Can TigerHubs inspect parts according to my 2D engineering drawings?

Inspection requirements should be reviewed against the latest approved drawings, including specified dimensions, GD&T, materials, finishes, and critical features. The measurement scope and acceptance criteria should be agreed before production.

Can I request 100% inspection of critical dimensions?

Yes, 100% inspection can be included as a project requirement when measurement feasibility, inspection methods, and costs are confirmed. Other characteristics may be inspected using an agreed sampling plan.

Can you provide first article inspection before mass production?

First article inspection can be specified during project planning to verify that initial production parts meet agreed engineering requirements before proceeding with larger batches.

How are quality requirements managed across different factories？

Project-specific drawings, material specifications, critical features, and acceptance criteria should be communicated to the responsible manufacturing facility and verified against an agreed inspection plan.

Can you arrange third-party testing for castings or metal 3D printed parts?

Third-party testing, such as selected non-destructive or material tests, may be arranged subject to project requirements and qualified testing-provider availability.

Can I request specific material certificates and inspection reports?

Customers should specify required documents during the RFQ stage. Availability depends on the material supply chain, manufacturing process, and applicable inspection scope.

What happens if delivered parts do not meet the agreed specifications?

Quality concerns should be documented against the approved drawings and acceptance criteria. The affected parts, inspection evidence, and appropriate corrective or replacement options can then be reviewed under the agreed project terms.

Quality Starts With Your Engineering Requirements

Upload your CAD files and technical drawings to discuss tolerances, inspection methods, material requirements, and quality documentation before production.

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Quality Control at Every Manufacturing Stage

Manufacturing Quality Standards & Tolerances

Manufacturing Process

Typical Tolerance Reference

Applicable Standards

CNC Machining

±0.10 mm general; down to ±0.025 mm for selected precision features

ISO 2768, ISO 286, ISO 1101

Injection Molding

±0.10 mm typical; down to ±0.05 mm for selected features

ISO 20457

Sheet Metal Fabrication

±0.10–0.20 mm for selected laser-cut features; formed-part tolerances vary

ISO 2768, ISO 9013

Metal 3D Printing

±0.10–0.20 mm for selected LPBF features; size-dependent variation applies

ISO/ASTM 52902 for system capability assessment

Die Casting

Approximately ±0.10–0.30 mm on selected features, depending on part size and geometry

ISO 8062 series

Sand Casting

Casting tolerance grade and nominal dimensions determine achievable accuracy

ISO 8062 series

Quality Documentation & Inspection Reports