Rubber Testing Calibration Services in North Carolina and Beyond

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Calibration Services for Rubber Testing Instruments


Rubber compounders and manufacturers rely on precise cure, viscosity, hardness, and tensile data to control formulation, processing, and final product quality. When the instruments generating that data drift out of calibration, the result is inconsistent cure times, failed batches, out-of-spec parts, and compliance findings that can shut down a production line. Polymer Testing Instruments, backed by the trusted Accredited Labs network, provides specialized calibration for the full range of rubber testing equipment—so the numbers your quality team relies on are numbers you can trust.

Polymer Testing Instruments, backed by the trusted Accredited Labs network, provides comprehensive rubber testing instrument calibration services to deliver the precision and reliability your critical operations demand.

What We Calibrate


Rheometers (ODR/MDR)
Oscillating Disc Rheometers and Moving Die Rheometers generate the cure curves that define scorch time, cure rate, and final torque for every rubber compound you produce. Our technicians verify torque accuracy, temperature control, and timing functions against certified reference standards, ensuring your cure data remains repeatable batch to batch and defensible during ASTM D2084/D5289 compliance audits.

Mooney Viscometers
Mooney viscosity readings drive raw material acceptance and batch-to-batch consistency decisions. We calibrate torque, temperature, rotor speed, and timing on your Mooney viscometer to confirm it continues to meet ASTM D1646 requirements, protecting the incoming inspection and process control decisions built on that data.

Torque Standards
Torque measurement underpins nearly every rubber test method, from rheometer output to viscometer readings. Our torque standard calibration provides the traceable reference values your instruments are ultimately checked against, giving you a documented, unbroken chain of traceability back to national standards.

Rubber Hardness (Durometer)
Shore A and Shore D durometers determine whether finished rubber parts meet hardness specifications critical to sealing, wear, and performance requirements. We calibrate indenter geometry, spring force, and gauge readings to ASTM D2240 requirements, so your hardness testing stays accurate across the full durometer scale.

Tensile Testing (ASTM D412) & Extensometers (ASTM D883)
Tensile strength, elongation, and modulus data determine whether your rubber compounds can withstand real-world stress and strain. We calibrate load cells, crosshead speed, and extensometer displacement to ensure your tensile testing equipment delivers accurate force and elongation measurements consistent with ASTM D412 and related extensometer standards.

Why Rubber Manufacturers Choose PTI


Deep Familiarity with Rubber Test Methods
We understand the specific ASTM and ISO standards that govern rheometry, viscometry, hardness, and tensile testing in the rubber industry—not just generic force and torque calibration. That specialization means fewer questions, faster turnaround, and calibration reports that speak your quality system's language.

Powered by Accredited Labs
As part of the Accredited Labs family, PTI combines local, personalized service with the resources and technical depth of a national calibration network, giving us the capability to handle demanding rubber testing equipment across your entire lab.

ISO/IEC 17025 Accreditation
Our ISO/IEC 17025 accreditation means our calibration results carry the technical credibility your customers, auditors, and regulators expect—accurate, traceable, and internationally recognized.

Comprehensive, Audit-Ready Documentation
Every calibration comes with detailed reports covering measurement data, uncertainty analysis, and recommended calibration intervals—built to satisfy IATF 16949, ISO 9001, and internal quality audits without scrambling for missing paperwork.

Fast Turnaround
We know a rheometer or Mooney viscometer down for calibration is a line that isn't running. Our scheduling and streamlined processes get your instruments back in service quickly, without cutting corners on accuracy.

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Audit-Ready Calibration in 3 Simple Steps
1

Submit Your Equipment List

Send us a list of the equipment you need calibrated, and we’ll provide a tailored quote with clear pricing—no hidden fees.
2

Schedule Your Calibration

Choose a convenient time for an in-lab or on-site equipment calibration. Our certified technicians ensure precision and compliance with ISO/IEC 17025 standards.
3

Stay Compliant & Audit-Ready

Receive detailed calibration reports and certification, giving you peace of mind for audits and operational excellence.