NABL Accredited · CC-2480 · Est. 2004 · Gujarat's Trusted Calibration Lab
NABL-accredited calibration for Plain Ring Gauges, Plain Plug Gauges, Taper Ring & Plug Gauges. ISO 1938 traceable, accepted by ISO 9001, IATF 16949, BIS auditors.
±0.001 mm
Uncertainty
1–250 mm
Range
ISO 1938
Standard
ISO 1938
Plain Limit Gauges
NABL Accredited
CC-2480
— WHAT IS RING & PLUG GAUGE CALIBRATION —
A worn ring gauge will accept shafts that are actually oversized — leading to defective assemblies at your customer. Ring and plug gauge calibration verifies the actual gauge diameter against NPL-traceable masters and confirms the GO/NO-GO tolerance band is still valid.
Check
Actual diameter measured at multiple axial positions using NPL-traceable air gauges and precision bore standards.
Verify
GO/NO-GO compliance checked against ISO 1938 tolerance band. Roundness and wear assessed.
Certify
NABL CC-2480 certificate with actual measured dimension and uncertainty — accepted by ISO 9001 & IATF.
— INSTRUMENTS COVERED —
All 4 gauge types · All sizes 1–250mm · Go/No-Go & Taper · NABL accredited
Plain ring gauges for checking external shaft and pin diameters.
Plain plug gauges for checking internal hole diameters.
Taper ring gauges for checking external taper dimensions and fits.
Taper plug gauges for checking internal taper bores and fits.
— OUR PROCESS —
Gauge received, tagged, condition documented — bore/shaft surface, wear marks, gauge size verified.
Gauge surfaces cleaned, visual inspection for wear or damage. As-found condition recorded.
Diameter measured at multiple axial positions using NPL-traceable air gauges or precision bore standards.
Measured values compared against tolerance band per ISO 1938. Go/No-Go compliance determined.
Final readings verified and documented. Roundness and surface condition assessed. Pass/fail recorded.
NABL CC-2480 certificate with actual measured dimension, uncertainty (k=2), ISO 1938 traceability.
— STANDARDS & COMPLIANCE —
ISO 1938
Plain Limit Gauges (Ring/Plug)
IS 919
Limits and Fits (Indian Standard)
ASME B89.1.5
Plain Internal Diameter Measurement
ISO/IEC 17025
NABL Accreditation Standard
Prism holds NABL CC-2480 under ISO/IEC 17025:2017. Our ring and plug gauge calibration certificates are valid for ISO 9001, IATF 16949, BIS, and all audit purposes.
— NON-NABL CALIBRATION —
For routine maintenance or workshops not needing NABL certification — cost-effective non-NABL ring and plug gauge calibration with the same engineers and traceable references.
All non-NABL jobs use NPL-traceable master gauges — only the certificate type differs.
Non-NABL gauge jobs completed faster — ideal for urgent maintenance or bulk batches.
Priced lower than NABL — right choice for internal checks and non-audit use cases.
Available at our Ahmedabad lab and onsite across Gujarat — same team, same quality.
— AREAS WE SERVICE —
Engineers travel to your facility with portable calibration equipment — zero downtime, zero instrument removal.
Why Choose Prism
Since 2004, every NABL ring gauge and plug gauge certificate issued by Prism has been accepted by ISO, IATF, BIS, FDA, and GPCB auditors — no rejections, no rework.
— FAQ —
Get In Touch
Tell us the gauge types, sizes, and quantity. We respond within 2 business hours.
— FROM OUR BLOG —
Dial gauges and dial indicators are the workhorses of dimensional inspection. NABL-certified calibration per ISO 463 ensures accurate readings for flatness, run-out, and dimension checking.
Read More
Surface roughness (Ra, Rz) is a critical quality parameter in precision machining, sealing surfaces, and coating adhesion. NABL-certified roughness tester calibration ensures accurate surface texture measurements.
Read More
Micrometers are the precision dimensional tools of choice for 0.001 mm resolution measurements. NABL-certified micrometer calibration ensures your measurements meet engineering tolerances.
Read MoreNABL Accreditation Disclaimer
Calibration services are provided under NABL Certificate CC-2480 in strict accordance with our officially approved scope of accreditation (ISO/IEC 17025:2017). Parameters or onsite conditions falling outside our active NABL scope are processed with standard metrological traceability to NPL/BIPM national standards.