NABL Accredited · CC-2480 · Est. 2004 · Gujarat's Trusted Calibration Lab
NABL-accredited calibration for torque wrenches (transfer), nutrunners, slip clutches, and screwdrivers from 0.01 N·m to 50,000 N·m. ISO 6789 / ISO 5393 traceable. IATF 16949 accepted.
±3% / ±4%
Accuracy Class
0.01–50000 N·m
Range
ISO 6789
Standard
ISO 6789
Torque Tool Calibration Standard
NABL Accredited
CC-2480
— WHAT IS TORQUE TRANSMISSION CALIBRATION —
Think of a quality lab that relies on a torque transmission for daily measurements. If it has drifted even slightly from its true value, every reading becomes unreliable — leading to defective products, failed audits, or safety risks. Regular calibration is the only way to confirm your instrument is telling the truth.
Torque Transmission calibration means comparing its readings against a NABL-traceable certified reference standard at multiple test points, recording the deviations, adjusting where possible, and issuing an NABL certificate — accepted by ISO 9001, IATF 16949, and all quality auditors.
Compare readings against a NABL-traceable reference standard across the full measurement range.
Adjust or document deviations so your instrument reads within accepted tolerance.
Issue a NABL-accredited certificate (CC-2480) with full traceability documentation.
— INSTRUMENTS COVERED —
Click Wrench / Nutrunner / Slip Clutch / Screwdriver · All makes (Norbar, Atlas Copco, Gedore) · ISO 6789 · NABL accredited
Torque multipliers for amplifying input torque for high-torque fastening.
Torque limiters and couplers for protecting machinery from overload.
Drive shaft torque sensors for measuring torque in power transmission shafts.
Gearbox torque testers for verifying torque transmission efficiency.
— OUR PROCESS —
Torque transmission device received and tagged. Drive mechanism, clutch, ratchet, or coupling inspected. Visual condition documented.
For wrenches and screwdrivers: 5 pre-load cycles at target torque before formal measurement. For nutrunners: 10 tool actuations at set torque.
Three measurements at each test torque (ISO 6789 minimum) or five (for transfer standard classification). Data captured via calibrated transducer and analyser.
CW and CCW directions verified where applicable. Symmetry of the torque transmission mechanism documented.
Mean, standard deviation, and relative error calculated. ISO 6789 accuracy class determined (±3%, ±4%, or ±6%).
NABL CC-2480 certificate with torque values, accuracy class, uncertainty (k=2), ISO 6789 / ISO 5393 traceability.
— STANDARDS & COMPLIANCE —
ISO 6789
Assembly Torque Tools — Calibration
ISO 5393
Rotary Tools — Test Methods
ASME B107.300
Torque Instruments Standard
ISO/IEC 17025
NABL Accreditation Standard
Prism holds NABL CC-2480 under ISO/IEC 17025:2017. Torque tool certificates accepted by IATF 16949, ISO 9001, and all automotive, aerospace, and heavy engineering assembly audit bodies.
— NON-NABL CALIBRATION —
For routine maintenance, bulk calibration, or internal QC checks where a full NABL certificate is not mandatory — Prism offers cost-effective non-NABL calibration using the same NABL-traceable reference standards and trained engineers.
All non-NABL work uses NABL-certified reference standards — readings are still reliable and defensible.
Without full NABL documentation, instruments return faster — ideal for urgent production schedules.
Non-NABL calibration costs less — practical for large batches or routine periodic checks.
Available at your facility or at our Vatva lab — same quality, more flexibility.
— AREAS WE SERVICE —
Engineers bring portable torque analysers directly to your production floor. Onsite calibration for shop-floor torque tools across Gujarat.
Why Choose Prism
Since 2004, every NABL torque certificate issued by Prism has been accepted by IATF 16949, ISO 9001, and automotive assembly audit bodies — no rejections.
— FAQ —
Get In Touch
Tell us the tool type, range (N·m), make/model, quantity, and if you need onsite or in-lab service. We respond within 2 business hours.
— FROM OUR BLOG —
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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.