Dimensional and geometric inspection
Hexagon GLOBAL CLASSIC SR CMM
- Verified range
- 500 × 700 × 500 mm working volume
- Typical checks
- Size, form, position, coaxiality, runout, and datum relationships
Quality Inspection & Process Control
Direct answer
Jinhua Machinery plans inspection from the approved drawing, governing standard, datum system and agreed control plan. Confirmed internal capability supports precision outside diameters, finished bores, cylindrical gears, bevel gears, worm shafts and drawing-specific spline evaluation within the published ranges. Dimensional, form, roughness, hardness and gear results can be recorded for production review. Required report format, sampling, traceability, gauge method and retention period must be identified before quotation; no listed grade is assumed equivalent across different standards.
- Technical content reviewed by
- Process Engineering and Quality Engineering
- Last reviewed
- Capability basis
- Production records and internal inspection data
Inspection equipment and verified scope
Measurement evidence behind drawing-based production
Equipment is selected around the characteristic being controlled—not around a generic checklist. The confirmed internal scope below supports dimensional, gear, hardness, material, surface, mechanical-property, and metallographic evaluation. Final methods, sampling, and reports remain subject to the approved drawing and quotation review.
Gear geometry
JD26 Gear Measuring Center
- Verified range
- Module 1–8 mm; maximum outside diameter 260 mm; face width up to 320 mm
- Typical checks
- Profile, lead, radial runout, cumulative pitch, and single-pitch deviations
Optical measurement
VMS250 Vision Measuring Machine
- Typical checks
- Small dimensions, arcs, circles, distances, angles, and profile features
- Use in control plans
- First-piece, in-process, and sample checks where optical access is appropriate
Microhardness and layer evaluation
GYJ-HVS1000Z Vickers Tester
- Calibrated range
- HV0.05–HV30
- Typical checks
- Microhardness, hardness gradients, and effective case-depth evaluation
Heat-treatment verification
GYJ-HRTS150 Rockwell Tester
- Verified scales
- HRA, HRB, and HRC
- Typical checks
- Surface or core hardness according to the applicable drawing and heat-treatment specification
Contour and surface texture
WALE CQR Contour & Roughness Measuring Machine
- Installed configuration
- Z-axis 620 mm; Z1-axis measuring range 60 mm
- Inspection scope
- Contour geometry and surface roughness using dedicated contour and roughness sensors
Incoming material verification
DF-100E Optical Emission Spectrometer
- Typical use
- Carbon and alloy-steel chemistry checks against the specified material grade
- Verified elements include
- C, Si, Cr, Mn, Ni, and Mo, with the applicable method selected by material
Mechanical properties
WEW-600 Universal Testing Machine
- Verified capacity
- 600 kN; Class 1
- Typical checks
- Tensile and compression testing, including strength and elongation assessments as specified
Metallographic evaluation
Olympus BX53M Metallurgical Microscope
- Verified magnification
- 50×–500× with the supplied objective range
- Typical checks
- Grain size, inclusions, microstructure, decarburized or carburized layers, carbide distribution, and surface defects
From drawing to record
How inspection is planned
- Review the requirement. Confirm drawing revision, material, heat treatment, datums, critical characteristics, sampling, and report expectations.
- Select the method. Match each characteristic to CMM, vision, gear, hardness, roughness, chemistry, mechanical, or metallographic inspection.
- Control production. Use first-piece, patrol, and sample checks according to the released process and inspection instructions.
- Verify special characteristics. Check gear geometry, hardness, case depth, microstructure, surface texture, and datum relationships where the drawing requires them.
- Release against agreed criteria. Record and provide the reports, certificates, marking, and traceability agreed before quotation.
Available by project agreement
Inspection records buyers can request
Report format, sampling level, retention period, traceability, and customer-specific templates should be stated in the RFQ.
- Dimensional and geometric inspection report
- Gear profile, lead, pitch, and runout records
- Rockwell or Vickers hardness results
- Hardness-gradient and effective case-depth records
- Material chemistry verification results
- Surface roughness results
- Mechanical-property test results when applicable
- Metallographic evaluation records when applicable
The equipment shown is supported by current internal records and periodic calibration evidence. Certificate scans, serial numbers, signatures, and calibration QR codes are retained as controlled evidence rather than published on the website. Customer-specific or third-party inspection requirements are reviewed separately before quotation.
Management system certificates
Certificates and verified scopes
The English certificate pages below are published as supporting evidence. Each certificate has its own stated scope, certificate number, and validity period; applicability to a new component or program is confirmed during drawing and quotation review.
View full English certificate
Automotive quality management
IATF 16949:2016
- NQA Certificate
- T87870
- IATF Certificate
- 0539859
- Valid until
- 21 August 2027
- Certified scope
- Manufacturing of steering pump shafts and gearbox pins
View full English certificate
Occupational health and safety
ISO 45001:2018
- Certificate
- 0342026S0171R101
- Valid until
- 09 April 2029
- Certified scope
- Occupational health and safety management activities related to production of automotive steering pump shafts
View full English certificate
Environmental management
ISO 14001:2015
- Certificate
- 47086
- Valid until
- 04 November 2028
- Certified scope
- Production of automotive steering pump output shaft
Certificate scopes are not presented as blanket certification for every product shown on this website. Buyers may request the current certificate copy and confirmation of scope during project review.
Acceptance requirements before quotation
Agree the inspection scope and delivery records
Use the RFQ to define what must be measured, how acceptance will be judged and which records are needed with delivery. An inspection plan describes agreed checks; it is not evidence that measurements have already been completed. Methods, sampling and report commitments are confirmed by agreement after drawing review.
Our manufacturing support follows IATF 16949-based process-control principles for automotive and industrial components. The production route, checkpoints, and acceptance criteria are established from the approved drawing and order requirements.
Quality information to include in your RFQ
- 2D drawing and, when available, 3D model with revision level
- Material grade and applicable standard
- Critical dimensions, tolerances, and datum requirements
- Heat treatment, hardness, coating, plating, or surface-finish requirements
- Inspection report, certificate, marking, packaging, and traceability requirements
- Prototype quantity, production quantity, annual demand, and target delivery date
Inspection planning questions buyers ask
How is an inspection plan agreed before quotation?
The drawing revision, governing standard, datums, critical characteristics, sampling requirements and expected reports define the review. Identify incomplete or conflicting requirements before agreeing the inspection scope. The plan establishes which checks are required, rather than reporting measurements already taken.
How is the inspection method selected?
The method is matched to the characteristic being verified and its drawing requirements. Equipment range describes physical capacity, not an acceptance tolerance for every component. Review the datum system, feature definition and any required gauge or measurement method together.
Which production checks should be specified?
Applicable first-piece, in-process and sample checks follow the released process and inspection instructions. State the critical characteristics and required sample quantities in the RFQ so they can be reviewed. A published equipment list does not establish one inspection frequency for every order.
Are reports and traceability records automatically included?
Reports, certificates, marking and traceability are defined by agreement before quotation. State the report format, required records, retention period and any customer-specific template. The requested deliverables must be confirmed for the project; the list of available record types is not an automatic delivery commitment.
How should material and treatment records be requested?
Identify the material grade and governing standard, drawing-specified heat treatment or surface treatment, and the certificates or inspection records required. Manufacturing and special-process responsibilities, including any provider requirements, need project review; a requested record does not establish that every process is performed in-house.
Can customer-specific or third-party inspection be included?
Customer-specific and third-party inspection requirements are reviewed separately before quotation. Provide the required scope, method, sampling and report expectations so the request can be assessed. It is not automatically covered by the internal equipment shown above.
Do published capability values and certificates cover every order?
Capability references apply only within their stated process and size ranges and remain subject to drawing review. Certificate applicability is limited to each stated scope. Identify the governing standard and edition: grade numbers across different standards are not assumed equivalent, and neither a reference value nor a certificate replaces project-specific acceptance requirements.
Precision Capability Reference
Jinhua Machinery can achieve the following stable production capabilities within the stated process and size ranges, subject to drawing review, with internal measurement and inspection records. These values are reference limits, not universal tolerances for every component.
- Precision ground outside diameters
- Achievable capability: 0.005 mm total diameter tolerance; 0.003 mm roundness; 0.005 mm cylindricity; 0.005 mm straightness per 300 mm; Ra 0.2 μm
- Reference scope and process: Outside diameter up to 50 mm and effective cylindrical grinding length up to 300 mm
- Precision bores
- Achievable capability: 0.009 mm total bore tolerance; 0.005 mm roundness; 0.008 mm cylindricity; 0.010 mm coaxiality or total runout; Ra 1.0 μm
- Reference scope and process: Bore diameter up to 30 mm and L/D up to 3 using precision boring or reaming
- Ground cylindrical gear accuracy
- Achievable capability: ISO 1328-1 / GB/T 10095 Grade 7 after heat treatment and gear grinding; tooth surface Ra 0.8 μm
- Reference scope and process: Spur gears, helical gears, and gear shafts with module up to 4, tip diameter up to 200 mm, and face width up to 50 mm
- Ground bevel gear accuracy
- Achievable capability: ISO 17485 Grade 7 after heat treatment and gear grinding
- Reference scope and process: Bevel gears with module up to 4 and outside diameter up to 200 mm
- Ground worm accuracy
- Achievable capability: GB/T 10089 / DIN 3974 Grade 7 after heat treatment and worm grinding
- Reference scope and process: Module up to 4, worm outside diameter up to 100 mm, and effective tooth length up to 100 mm
- Spline fit and inspection
- Achievable capability: External and internal spline geometry, fit, gauges, and analytical measurements are controlled to the customer-specified standard
- Reference scope and process: No universal spline grade is claimed; the standard edition, centering method, fit class, datum relationships, and report requirements are evaluated per drawing
The standards named on this page describe confirmed reference conditions for the stated capability. Jinhua Machinery can also evaluate drawings based on other ISO, GB/T, DIN, AGMA, ANSI, SAE, customer-specific, or industry-specific standards. Grade numbers in different standards are not assumed to be equivalent; the governing edition, tolerance definitions, measurement method, datum system, and reporting requirements must be reviewed before quotation.
Review related shaft manufacturing, gear manufacturing, forged shaft, or send a drawing through Request a Quote.