SINOTEST NWS Series Torsion Testing Machine
| Brand | SINOTEST |
|---|---|
| Origin | Jilin, China |
| Manufacturer Type | Direct Manufacturer |
| Regional Classification | Domestic (China) |
| Model | NWS Series |
| Price Range | USD 7,000 – 14,000 (FOB) |
| Maximum Torque | 80,000 N·m |
| Torque Measurement Range | 1–100% of full scale |
| Angular Resolution | 0.0002° |
| Torsional Angle Measurement Range | 0–100,000° |
| Drive Motor Power | 500 W |
Overview
The SINOTEST NWS Series Torsion Testing Machine is an electromechanically driven, high-capacity static torsion testing system engineered for precise quantification of torsional mechanical behavior in metallic, non-metallic, composite, and structural components. It operates on the principle of controlled torque application via a servo-motor-driven actuator coupled with high-fidelity angular displacement feedback, enabling direct measurement of torque–angle response curves under quasi-static loading conditions. Designed for laboratory- and production-floor-based materials characterization, the system supports standardized evaluation of torsional yield strength, ultimate torsional strength, shear modulus (G), non-proportional torsional stress (e.g., τp0.2), and torsional fracture behavior per internationally recognized test protocols.
Key Features
- High-torque capacity up to 80,000 N·m — suitable for large-diameter shafts, drive train components, and aerospace fasteners.
- Wide torsional angle range (0–100,000°) enables multi-turn deformation analysis, including low-cycle fatigue pre-conditioning and progressive twist-to-failure tests.
- Angular resolution of 0.0002° ensures sub-arcsecond detection capability for accurate determination of elastic region onset and micro-yield transitions.
- Full-scale torque measurement accuracy compliant with JJG 269–2006 Class 1 requirements, supporting traceable calibration against national metrological standards.
- Integrated servo control architecture with 500 W brushless motor delivers smooth, programmable ramp-and-hold torque profiles with minimal thermal drift.
- Rigid monolithic frame construction minimizes parasitic bending moments and axial deflection during high-load torsion, preserving measurement integrity.
Sample Compatibility & Compliance
The NWS Series accommodates specimens ranging from threaded fasteners (e.g., MJ-series self-locking nuts per HB 7595–2011) to solid/holed cylindrical rods (up to Ø300 mm), tubular sections, and composite laminates with bonded or clamped end fixtures. Specimen mounting utilizes interchangeable hydraulic or mechanical chucks with radial alignment compensation. The system complies with GB/T 10128–2007 (Metallic Materials – Torsion Testing at Ambient Temperature), JJG 269–2006 (Verification Regulation for Torsion Testing Machines), and provides documented traceability to CNAS-accredited calibration laboratories. Optional torque transducer verification kits support internal periodic verification per ISO/IEC 17025 guidelines.
Software & Data Management
Control and data acquisition are managed via SINOTEST’s proprietary TorsionTest Pro software, running on Windows OS with real-time dual-channel plotting (torque vs. angle, torque rate vs. time). The software supports user-defined test sequences—including multi-step torque hold, cyclic torsion (±θ or ±T), and creep under constant torque—with automatic event tagging (yield point, peak torque, fracture). Raw data export is available in CSV, Excel, and XML formats; audit trails record operator ID, timestamp, calibration status, and parameter modifications—fully aligned with GLP documentation requirements. Optional 21 CFR Part 11-compliant modules provide electronic signatures, role-based access control, and immutable data archiving for regulated environments.
Applications
- Determination of shear modulus (G) via linear elastic region slope in torque–angle plots, optionally enhanced by auxiliary extensometry or optical twist measurement.
- Evaluation of torsional yield strength (τy) and non-proportional torsional stress (τp0.2) using offset methods per GB/T 10128–2007 Annex B.
- Qualification testing of high-reliability fasteners, including temperature-stable MJ-threaded self-locking nuts per HB 7595–2011.
- Structural validation of driveline components (propeller shafts, CV joints) under static torsional overload and torsional stiffness mapping.
- Research-grade characterization of fiber-reinforced polymer (FRP) composites, including interlaminar shear strength estimation and damage progression analysis.
FAQ
What standards does the NWS Series formally comply with?
The system meets metrological verification requirements per JJG 269–2006 and supports execution of mechanical testing per GB/T 10128–2007 and HB 7595–2011. Calibration certificates include uncertainty budgets referenced to SI-traceable torque standards.
Can the machine perform cyclic torsion testing?
Yes — TorsionTest Pro software supports programmable sinusoidal, triangular, or trapezoidal torque/angle waveforms with user-defined frequency, amplitude, and dwell parameters.
Is external torque transducer calibration supported?
The system accepts third-party torque transducers with analog ±10 V or digital RS-422/USB interfaces; built-in scaling and zero-balance functions enable rapid reconfiguration.
What specimen geometries are compatible?
Standard configurations support solid/hollow cylinders, rectangular bars, and threaded fasteners. Custom fixtures (e.g., spline clamps, torsion plates) are available upon request.
Does the system support remote monitoring or integration with MES/LIMS?
API-based data streaming (RESTful JSON over TCP/IP) and OPC UA server options allow seamless integration with factory automation systems and laboratory information management platforms.
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