Qinji QJ210 Universal Testing Machine for Flexural Strength Testing
| Brand | Qinji |
|---|---|
| Origin | Shanghai, China |
| Model | QJ210 |
| Instrument Type | Electromechanical Universal Testing Machine |
| Load Capacity | 0–2500 N |
| Load Accuracy | ±0.5% of full scale |
| Effective Test Width | 150 mm |
| Effective Test Height | 300 mm |
| Crosshead Speed Range | 0.01–1000 mm/min |
| Speed Accuracy | ±0.5% of indicated value |
| Displacement Measurement Accuracy | ±0.5% of indicated value |
| Strain/Deformation Measurement Accuracy | ±0.5% of indicated value |
| Power Motor | 200 W |
| Dimensions (L×W×H) | 430 × 315 × 855 mm |
| Net Weight | 40 kg |
| Resolution | 500,000 counts (full-scale, no range switching) |
| Load Cell Resolution | Fixed throughout entire range |
| Safety Features | Electronic limit protection, overload protection at 110% of max load, manual/auto return, jog-controlled vertical movement |
Overview
The Qinji QJ210 Universal Testing Machine is an electromechanical static mechanical tester engineered for high-reproducibility flexural strength evaluation of brittle and quasi-brittle materials—including dental ceramics, structural ceramics, glass-ceramics, and advanced technical oxides. It operates on the principle of controlled displacement-driven loading in compliance with standardized three-point and four-point bending configurations per ASTM C1161, ISO 14704, and GB/T 6569. The system integrates a precision ball-screw-driven crosshead, a calibrated 2500 N load cell with 500,000-count resolution, and closed-loop control of force, displacement, and strain—enabling accurate determination of flexural modulus, fracture stress, proportional limit, and deflection at break. Designed for laboratory environments requiring GLP-aligned traceability, the QJ210 supports deterministic test execution under ambient conditions and delivers consistent mechanical response data across repeated cycles.
Key Features
- Electromechanical actuation with 200 W servo motor and precision ground ball screw for smooth, low-noise crosshead motion
- Full-range load measurement from 0.2% to 100% of 2500 N capacity without range switching—ensuring linearity and repeatability across low- and high-force regimes
- Closed-loop control modes: force, displacement, and strain—with user-selectable ramp rates and hold durations per ISO 527-1 and ASTM D638 protocols
- Electronic limit switches and programmable overload cutoff (110% FS) for operator and specimen safety
- Dual-speed vertical movement (jog + continuous) with manual return capability and automated post-test return-to-origin function
- Stiff, rigid frame architecture (40 kg mass, 855 mm height) minimizing parasitic deflection during high-stiffness ceramic testing
- Standardized test space: 150 mm effective width and 300 mm vertical clearance—accommodating ISO-standard 3 mm × 4 mm × 45 mm ceramic bars and ASTM C1161-compliant specimens
Sample Compatibility & Compliance
The QJ210 is validated for static mechanical characterization of non-metallic solids with elastic moduli ranging from 10 GPa to 400 GPa. It supports standardized test geometries including three-point bending (ASTM C1161, ISO 14704), four-point bending (ISO 7438), uniaxial compression (ISO 6892-1, GB/T 7314), and tensile testing (with optional grips). All control firmware and calibration routines comply with ISO/IEC 17025 requirements for measurement uncertainty estimation. The instrument meets CE marking directives for mechanical safety (2006/42/EC) and electromagnetic compatibility (2014/30/EU). Calibration certificates are traceable to national metrology institutes via internal load cell verification against certified reference standards.
Software & Data Management
The QJ210 operates with proprietary Windows-based testing software supporting real-time acquisition of force-displacement-strain time-series at up to 100 Hz sampling rate. Raw data export is available in CSV and XML formats compliant with ASTM E1434 and ISO 10360-5 for third-party statistical analysis. Software features include automatic calculation of flexural strength (σf = 3FL/2bd² for 3-pt, σf = FL/bd² for 4-pt), elastic modulus from initial linear slope, yield offset (0.2% strain), and fracture toughness proxies. Audit trails record operator ID, timestamp, calibration status, and parameter modifications—supporting FDA 21 CFR Part 11 readiness when deployed in regulated quality control labs.
Applications
- Flexural strength validation of zirconia and alumina dental crowns and frameworks per ISO 6872
- Quality assurance of sintered SiC and Si₃N₄ components in aerospace and energy applications
- R&D-level comparative analysis of grain-size effects on fracture behavior in oxide ceramics
- Compressive strength assessment of porous bioceramic scaffolds (e.g., hydroxyapatite) per ISO 13314
- Interlaboratory round-robin testing for ISO/TC 106 dental materials standardization
- Educational use in materials science laboratories for hands-on mechanics-of-materials instruction
FAQ
What standards does the QJ210 support for ceramic flexural testing?
ASTM C1161, ISO 14704, ISO 6872, GB/T 6569, and JIS R1601—all implemented via preconfigured test templates and geometry-specific fixture alignment guides.
Is the load cell calibrated and traceable?
Yes—the 2500 N load cell is factory-calibrated with NIST-traceable reference loads; calibration certificate includes uncertainty budget per ISO/IEC 17025 Annex A.
Can the QJ210 perform cyclic or fatigue tests?
No—it is designed exclusively for static monotonic loading. For dynamic or fatigue evaluation, consider the Qinji QJ212 series with electrodynamic actuation.
What maintenance is required to maintain accuracy?
Annual verification of load cell linearity, crosshead alignment, and encoder resolution is recommended; all mechanical components are accessible without specialized tools.
Does the system support GLP-compliant reporting?
Yes—software generates PDF reports with embedded digital signatures, instrument ID, environmental conditions (optional external sensor input), and full audit trail export.
