OJTECH — OUJI Industrial Technology
EN
CMM probe inspecting a machined component on the measurement table at OUJI

Quality assurance at OUJI

CNC machining
quality control & inspection.

Inspection planned around your drawing, with results and records you can review.

Send your drawing See inspection evidence

CMM inspectionProbe measurement of a machined component · OUJI

2 ZEISS CMMs
In-house measurement resources
10 years of quality experience
Quality planning led by Li Liangliang
Reports agreed before production
Scope, format and delivery date confirmed

A published project

From drawing requirement
to measured result.

A 7075-T6 robot gearbox planet carrier, with its drawing and ZEISS CMM record available to inspect.

Front face of a finished 7075-T6 aluminum second-stage planet carrier for an industrial robot reduction gearbox
7075-T6 aluminumRobot gearbox planet carrierExplore this project

ZEISS CMM record

Selected 3 of 9 characteristics

Check the requirement.
Read the actual value.

Selected measurements, in millimetres (mm)
CharacteristicUpper limitMeasured
Cylindricity0.01000.0019 ✓
Perpendicularity0.01000.0013 ✓
Coaxiality0.01500.0015 ✓

All 9 characteristics in the published report are within their stated limits.

Read the CMM record Inspect the drawing

These results apply to the inspected part. They do not establish full-batch inspection coverage or statistical process capability.

Documentation & delivery

Know what comes
with your parts.

Agree the inspection scope and documents during quotation, so your receiving team knows what to expect.

Additional report preparationUp to approximately 1 extra day

Additional reports, including full-dimensional reports, are charged only for the personnel time needed to record results and prepare the documentation.

Allow up to approximately one additional day for this reporting work. The scope and delivery date are confirmed during quotation.

External testing and specialist-process schedules are quoted separately.

OUJI quality staff recording inspection results at a workbench with measurement tools and drawings
Inspection results being recorded by the quality team.

Agree the scope first

Inspection work & report preparation

The checks, records and documents supplied with your order are agreed during quotation. A full-dimensional report is a separately confirmed deliverable.

Include with your drawing

Mark the critical features, inspection scope, report format and required delivery date. We can then confirm the work and any additional report-preparation time.

Discuss your inspection requirements
Choose the documentation your order needs
DocumentWhat it recordsConfirm with your RFQ
Dimensional reportWhat it recordsMeasured results for agreed dimensions and inspection characteristics.Confirm with your RFQConfirm the dimensions, inspection scope and delivery format.
CMM inspection reportWhat it recordsRecorded measurement of suitable geometric features and datum relationships.Confirm with your RFQSpecify required features and reporting needs before production.
First article reportWhat it recordsDimensional verification for first-article approval or a new production setup.Confirm with your RFQAgree the customer report format and submission requirements.
Material certificateWhat it recordsAvailable grade, specification, heat or batch information for the requested certificate.Confirm with your RFQConfirm the certificate type before material purchasing.
Special-process recordsWhat it recordsApplicable heat-treatment, coating, hardness or third-party test documentation.Confirm with your RFQAvailability depends on the process, provider and agreed scope.

Look inside the records.

Download quality overview & samples PDF
Preview: Material inspection certificateView document excerpt

Material documentation

Material inspection certificate

A redacted material certificate excerpt for 39NiCrMo3 steel, showing chemical composition and mechanical test fields. The source certificate was issued in 2019.

Historical example, issued in 2019. Certificate requirements are agreed per order.

Inside the inspection workflow

The people and equipment
behind the checks.

Inspection methods are selected around the feature, its tolerance and the final condition of the part.

A ZEISS SPECTRUM coordinate measuring machine in OUJI's inspection area
ZEISS coordinate measurement
An OUJI technician operating a CMM beside a trolley of machined parts
Measurement on the shop floor
Dimensional & geometric

2 ZEISS CMMs

For suitable dimensions, geometric features and datum relationships.

Feature-specific checks

4 height gauges

Mahr, Trimos and TESA instruments, supported by gauges selected for the part.

Surface & optical

Vision & roughness

Runxing vision measurement and Mitutoyo roughness testing for applicable requirements.

Inspection equipment inventory
2 ZEISS CMMs; 4 height gauges from Mahr, Trimos and TESA; Runxing vision measurement; Mitutoyo roughness testing; microscopes and hardness testing
Inspection instrumentQuantity
Coordinate measuring machine
Manufacturer
ZEISS
Origin
Germany
Listed measurement accuracy
0.002 mm
1
Coordinate measuring machine
Manufacturer
ZEISS
Recorded model
7106
Origin
Germany
Listed measurement accuracy
0.0017 mm
1
Vision measuring instrument
Manufacturer
Runxing
Origin
China
Listed measurement accuracy
0.005 mm
1
Height gauge
Manufacturer
Mahr
Origin
Germany
Listed measurement accuracy
0.002 mm
1
Height gauge
Manufacturer
Trimos
Origin
Switzerland
Listed measurement accuracy
0.002 mm
1
Height gauge
Manufacturer
TESA
2
Roughness tester
Manufacturer
Mitutoyo
Origin
Japan
1
Microscope
Origin
China
1
Microscope
Origin
China
Maximum magnification
50×
1
Hardness tester
Origin
China
1

The equipment ledger lists ZEISS CMM measurement accuracies of 0.002 mm and 0.0017 mm. These are instrument records, not guaranteed inspection performance or finished-part tolerances.

Recording & calibration in our CNC milling workflow

OUJI records measured values for customer-marked critical dimensions and dimensions with a total tolerance band of 0.02 mm or less (upper limit minus lower limit). A 0.02 mm total band means, for example, ±0.01 mm.

Wider-tolerance dimensions are also inspected and marked OK or NG on the inspection drawing. NG results include the measured value.

Every new-part project has a first-article inspection record. Customer-specific report formats and delivery requirements are agreed before production.

Measuring instruments are calibrated by an external specialist metrology provider every 12 months, with internal calibration every 6 months.

Read the milling inspection practice
An instrument calibration label affixed to a height gauge at OUJI
An instrument label records calibration timing. This photograph is not a laboratory accreditation certificate.
Li Liangliang, OUJI Quality Director

Responsible for overall quality planning

Li Liangliang

Quality Director 10 years in quality management

Li manages overall quality planning at OUJI. He brings 10 years of quality management experience, practical proficiency with inspection tools, and a strong understanding of machining processes.

Meet the OUJI team

Before production. Through delivery.

Quality is planned into the order.

01Requirement Review

Drawing revision, material, quantity, tolerances, surface requirements, special processes, and required documents are reviewed before manufacturing.

Before moving forward: Technical requirements are understood and recorded.

02Process Route Approval

OUJI reviews the in-house equipment, process route, inspection capability, and any specialist-process arrangement required for the part.

Before moving forward: The machining route and any coordinated specialist processes are suitable for the project requirements.

03First-Part Verification

Initial parts are checked for setup accuracy, datum relationships, critical dimensions, appearance, and process stability before production continues.

Before moving forward: The manufacturing setup is verified before batch production.

04In-Process Control

Critical dimensions and process risks are monitored to detect tool wear, deformation, setup movement, or accumulated error before completion.

Before moving forward: Production remains within the agreed control requirements.

05Final Release

Finished parts, quantity, appearance, required dimensions, documents, and packaging are reviewed before shipment approval.

Before moving forward: The order is ready for documented release and delivery.

An OUJI technician using a vision measurement system to inspect a small component
Optical inspection of a small machined component.

Keep the part connected to its records.

Agree the required links between your order, drawing revision, material batch, inspection results and shipment documents during quotation.

Heat treatment, finishing and other specialist work are coordinated with partners. OUJI reviews agreed requirements, documents and final release.

When a quality issue arises

A clear route
to resolution.

OUJI coordinates the affected scope, technical review and an agreed corrective action with you.

Talk to our team
  1. 01

    Containment

    Identify and isolate the affected parts, batch, operation, or shipment to prevent further impact.

  2. 02

    Scope Confirmation

    Review inspection records, production information, drawing requirements, and traceability to determine the affected range.

  3. 03

    Root-Cause Review

    Evaluate material, programming, tooling, setup, clamping, machining, handling, external processing, and inspection factors.

  4. 04

    Corrective Resolution

    Coordinate reinspection, sorting, rework, remake, replacement, or another mutually agreed solution, followed by preventive updates when necessary.

Before you order

A few details
worth agreeing.

Inspection scope, reporting and acceptance should be clear before manufacturing begins.

Download the quality PDF
Do additional inspection reports affect cost or delivery?

Additional reports, including full-dimensional reports, are charged only for the personnel time needed to record results and prepare the documentation. Allow up to approximately one additional day for this reporting work. The scope and delivery date are confirmed during quotation. External testing and specialist-process schedules are quoted separately.

Can you provide CMM or First Article Inspection reports?

CMM inspection, First Article Inspection, and dimensional reports can be arranged according to drawing requirements, project risk, and the agreed inspection scope. Additional inspection and third-party testing may affect cost and lead time.

Are all dimensions inspected?

Inspection scope depends on drawing complexity, tolerance level, quantity, application, and customer requirements. Critical characteristics are identified during review. Full-dimensional inspection can be arranged when specifically required.

Can OUJI provide material certificates?

Material certificates can be provided when requested and confirmed during quotation. Please specify the required material standard, certificate type, batch traceability, and whether material substitution is prohibited.

Who performs the inspection?

Core machining is supported by OUJI's in-house inspection workflow. Qualified specialist process partners or approved third-party laboratories may provide additional verification when the project requires it. The method and documentation should be agreed before production.

How are nonconforming parts handled?

OUJI coordinates containment, scope confirmation, root-cause review, and an agreed corrective solution. Depending on the issue, this may include reinspection, sorting, rework, remake, replacement, or another mutually accepted action.

Is OUJI ISO 9001 certified?

OUJI is not currently ISO 9001 certified. Projects are managed through drawing review, in-house process planning, production follow-up, inspection coordination, documentation review, and corrective action. Project-specific reports and certificates should be confirmed before production.

Start with your requirements

Let’s review your part.

Send your drawing, quantity and inspection requirements. We’ll review the machining and documentation scope with you.

Send your drawing

Include with your enquiry

  • Drawing revision & critical features
  • Material, quantity & final finish
  • Required reports & acceptance criteria
  • Your required delivery date

Certification status: OUJI is not currently ISO 9001 certified. Inspection follows the drawing requirements and agreed acceptance criteria. Read our quality approach.

Quality planning: Li LiangliangPage updated

Inspection documentation

Document excerpt