JB-121A-Q Spring Tension & Compression Testing Machine (Jiubin Instruments)
| Brand | Jiubin Instruments |
|---|---|
| Origin | Shanghai, China |
| Model | JB-121A-Q |
| Max Test Force | 50 kN |
| Force Accuracy | ±0.5% FS |
| Tensile/Compression Stroke | 1000 mm |
| Displacement Resolution | 0.01 mm |
| Displacement Accuracy | ±0.01% FS |
| Speed Range | 0.01–500 mm/min |
| Speed Control Accuracy | ±0.1% (at set speed) |
Overview
The JB-121A-Q Spring Tension & Compression Testing Machine is a dual-mode electromechanical testing system engineered for high-reproducibility mechanical characterization of helical compression springs, extension springs, torsion springs, gas struts (pneumatic dampers), and linear actuators. Built upon a robust dual-column load frame architecture with precision ball-screw drive and closed-loop servo control, the instrument operates on fundamental principles of Hooke’s law-based force-displacement measurement under quasi-static loading conditions. It delivers traceable, ISO 7500-1 Class 1-compliant force data across its full 50 kN capacity range—suitable for R&D validation, incoming quality inspection, and production-line compliance testing in automotive, medical device, industrial automation, and appliance manufacturing environments.
Key Features
- Dual-mode operation: seamless switching between tension and compression test modes without hardware reconfiguration
- High-stiffness load frame with integrated anti-rotation guide columns ensures axial alignment stability during high-force (>30 kN) spring compression tests
- Real-time closed-loop displacement control with 0.01 mm resolution and ±0.01% FS accuracy—critical for precise spring rate (k-value) derivation and yield point detection
- Wide-speed actuation range (0.01–500 mm/min) enables low-velocity creep evaluation and high-speed dynamic cycle profiling per ASTM F2147 and ISO 10243
- Integrated overload protection and emergency stop circuitry compliant with IEC 61800-5-2 functional safety requirements
- Modular fixture interface (M6/M8 threaded mounting plates + T-slot base) supports rapid adaptation to custom spring geometries including variable pitch, conical, and nested designs
Sample Compatibility & Compliance
The JB-121A-Q accommodates springs with free lengths up to 950 mm and outer diameters ≤ 320 mm. Its open-throat design allows vertical loading of gas springs with extended piston rods and non-standard end fittings (e.g., ball studs, clevises, or threaded inserts). The system meets mechanical safety requirements per EN 61000-6-2 (EMC immunity) and EN 61000-6-4 (EMC emission), and supports audit-ready documentation for GLP/GMP-regulated environments. Force transducer calibration is traceable to NIM (National Institute of Metrology, China) standards; optional third-party ISO/IEC 17025 calibration certificates are available upon request.
Software & Data Management
Control and analysis are performed via Jiubin’s proprietary WinTest Pro v4.2 software—Windows 10/11 compatible, 64-bit native application supporting multi-language UI (English, Chinese, German). The software implements real-time curve overlay, automatic spring parameter extraction (initial load, solid height, spring rate, hysteresis loss), and configurable pass/fail limits per test step. All raw data—including time-stamped force, displacement, and velocity channels—are stored in vendor-neutral CSV and XML formats. Audit trail functionality complies with FDA 21 CFR Part 11 requirements when configured with user role management, electronic signatures, and immutable log archiving.
Applications
- Automotive: Gas spring characterization for liftgate dampers, seat recliners, and hood support mechanisms (per SAE J2727)
- Medical devices: Compression testing of orthopedic implant coil springs and surgical instrument return springs
- Industrial equipment: Validation of linear actuator preload consistency and fatigue life prediction input data
- Appliance manufacturing: End-of-line verification of washing machine suspension springs and refrigerator door hinge springs
- Academic research: Fundamental viscoelastic modeling of polymer-composite springs and temperature-dependent modulus studies (when paired with environmental chamber)
FAQ
What is the maximum spring free length this machine can accommodate?
The JB-121A-Q supports springs with a maximum free length of 950 mm, provided total compressed height remains within the 1000 mm stroke limit.
Does the system support cyclic fatigue testing?
Yes—WinTest Pro enables programmable multi-cycle sequences (tension-compression or compression-only) with dwell time, load/displacement ramping, and break detection logic.
Can the machine be integrated into an automated production line?
It features RS-232, Ethernet (TCP/IP), and optional digital I/O expansion modules for PLC synchronization and MES-level data handshaking.
Is third-party calibration documentation available?
Certified ISO/IEC 17025 calibration reports issued by CNAS-accredited laboratories can be supplied at time of delivery or scheduled annually.
What safety certifications does the JB-121A-Q hold?
The unit carries CE marking per Machinery Directive 2006/42/EC and conforms to EN ISO 12100:2010 risk assessment methodology.
