Renyi Castings
RFQ@renyicastings.com
Fast Response Email Support
Mon - Fri: 9:00-17:30
GMT+8
Ningbo city
China 315137
Fast Response Email Support
GMT+8
China 315137
Dimensional Inspection & Metrology
Every casting and machined component is dimensionally verified against drawing before it leaves our facility β inside a dust-free, 20Β°C constant-temperature metrology lab. CNC CMM, optical vision measuring system, and complete GD&T inspection reports are included with every order.
Constant Temperature Lab
3D Geometric Verification
Optical Non-Contact
First Article Inspection
Clean room standard environment
Constant temperature control
3D geometric verification
Non-contact measurement
Every first article inspected
Metrology Lab
Dust-free, constant-temperature CMM room β CNC20158 Coordinate Measuring Machine | Renyi Castings, Ningbo
“No part leaves our facility without dimensional sign-off inside this lab. Not a gauge station on the shop floor β a purpose-built, ISO 1-compliant environment where every measurement is traceable, repeatable, and audit-ready.”
Our metrology lab is maintained at a constant 20Β°C (Β±0.1Β°C), with humidity held at β€55% RH throughout. These controlled conditions eliminate the two most common sources of CMM measurement error: thermal expansion of metal parts, and particulate contamination of probe tips and optical sensors.
All dimensional work β first article inspection, production lot sampling, and customer witness inspection β takes place exclusively in this lab. It is a permanent, dedicated facility built for precision measurement, not a corner of the production floor pressed into service.
20Β°C Β±0.1Β°C
β€55% RH
Dust-Free
CNC CMM
VMS Optical
ISO 1 Reference Temp
Full GD&T
Our metrology lab houses two complementary dimensional inspection instruments β a CNC Coordinate Measuring Machine for full 3D geometric verification, and a high-speed optical Vision Measuring System for non-contact micro-feature measurement.
When OEM customers conduct supplier quality audits, the metrology lab is always on the checklist. Here is what our climate-controlled, dust-free environment means for the accuracy and reliability of your inspection data.
Metal expands with temperature. A 1Β°C deviation in an aluminum part introduces ~5 Β΅m of error per 200 mm of length β enough to reject a tight GD&T callout.
At 20Β°C (ISO 1 standard reference temperature), all measurements are internationally traceable and repeatable across labs worldwide.
Dust particles on precision surfaces or probe tips cause false readings. Our clean-room standard eliminates this contamination risk.
OEM and tier-1 customers audit supplier metrology labs as part of approved supplier qualification. A dedicated, climate-controlled lab demonstrates the quality investment serious buyers require.
Variance held within Β±0.1Β°C β eliminating thermal expansion error
Prevents condensation on optics and air bearing surfaces
Clean-room standard protects sensitive probe tips and optical sensors
Why 20Β°C? Β ISO 1:2016 defines 20Β°C as the standard reference temperature for geometrical product specifications. All gauge blocks, reference standards, and calibrated instruments are certified at this temperature. Measuring at any other temperature introduces systematic error from thermal expansion β which for aluminum (CTE ~23 Β΅m/mΒ·Β°C) can be significant even with a few degrees of deviation.
Our metrology lab handles the complete spectrum of dimensional verification β from standard linear tolerances to complex GD&T callouts, surface roughness measurement, thread gauging, and bore roundness.
Length, width, height, bore diameters, wall thickness, step heights, and all critical dimensions per drawing with tolerance verification.
Full geometric dimensioning and tolerancing β positional tolerances, profile of a surface, circular runout, total runout, and concentricity.
Go/no-go thread gauging for internal and external threads. Major diameter, pitch diameter, and thread depth verification.
Surface roughness measurement using a profilometer β Ra, Rz, and Rt values documented against customer specifications.
Precision bore measurement including diameter, roundness (circularity), cylindricity, and taper β critical for bearing seats and sealing surfaces.
Surface flatness, parallelism between datum surfaces, perpendicularity, and angularity β essential for mating and assembly interfaces.
From drawing review to final report β our structured inspection workflow ensures every critical dimension is verified, documented, and traceable.
01
QA team reviews customer drawing, identifies critical dimensions, GD&T callouts, and datum references to build the inspection plan
02
CNC CMM program created for automated measurement β probe paths, datum alignment, and measurement sequence defined
03
100% dimensional verification of the first production article β every feature measured against approved drawing
04
Ongoing production verified per AQL sampling plan or 100% inspection on request β CPK data generated for critical features
05
FAI report, dimensional records, and CPK data compiled, reviewed, and archived β shipped with every order
Every order ships with a complete documentation package β generated, reviewed, and archived before release. These records support your incoming inspection, supplier qualification, and ongoing quality audits.
Full dimensional and material verification of the first production article β every feature measured against approved drawing.
Statistical process capability data demonstrating consistent output within defined tolerance bands on critical features.
Detailed inspection records for each production batch β all critical dimensions measured and documented per the inspection plan.
OES spectrometer chemical composition data, mechanical test results, and heat treatment records for full material traceability.
Non-destructive X-ray inspection reports for internal porosity and defect detection β provided when applicable to your order.
Our metrology capabilities serve customers across industries where dimensional accuracy is non-negotiable β from automotive safety parts to fluid-handling valve bodies.
– Engine brackets & structural mounts
– Transmission housing datums
– EV battery tray mating surfaces
– Sensor enclosure sealing faces
– Safety-critical bore tolerances
– Valve body bore & spool fit
– Pump housing seal surfaces
– Manifold port positions
– Gearbox casing alignment
– Pneumatic cylinder bores
– Heat sink fin precision
– LED housing mating interfaces
– Connector body pin positions
– EMI shielding enclosure fit
– PCB mounting hole locations
– Machined surface flatness
– Thread gauge verification
– Assembly interface dimensions
– Prototype validation (FAI)
– Multi-cavity tool correlation
Yes β 100% First Article Inspection is standard on every new production run, included at no extra charge. Every dimension, GD&T callout, and material specification on your drawing is measured and documented before mass production begins.
We follow ISO, ASTM, and customer-specific standards. Our metrology lab operates at 20Β°C per ISO 1 reference temperature. Inspection plans are built around your drawing specifications and applicable industry standards.
Yes β customer and third-party audits are welcome. Our climate-controlled, dust-free metrology lab is purpose-built and ready for audit at any time. We regularly host OEM and tier-1 quality audits.
First Article Inspection is 100% β every feature on every first article. Production runs are inspected per AQL sampling plan (commonly AQL 1.0 or 2.5), or 100% inspection can be arranged on request for critical applications.
Submit your 2D/3D drawings with GD&T requirements. Our QA team will review critical dimensions and include a full inspection plan β FAI, CPK, and dimensional records β with every quotation.
100% First Article Inspection included
CPK data on critical features
Full dimensional inspection records per batch
Material test reports with OES data
X-ray NDT reports when applicable
Send your drawings to us β every quotation includes a full QA plan with FAI, CPK data, and dimensional inspection records, at no additional charge.
Professional casting and forging solutions since 2005. From raw castings to finished components β quality you can rely on, delivered on time.
RFQ@renyicastings.com
Mon β Fri: 9:00 β 17:30 (GMT+8)
Ningbo, Zhejiang, China 315137
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