Jiubin JB-TB Manual Spring Tension and Compression Testing Machine
| Brand | Jiubin |
|---|---|
| Origin | Shanghai, China |
| Model | JB-TB |
| Price | USD 2,100 (FOB Shanghai) |
| Max Test Force | 2000 N |
| Force Resolution | 0.1 N |
| Displacement Resolution | 0.01 mm |
| Max Travel | 110 mm |
| Test Space (Tension/Compression) | 270 / 250 mm |
| Platen Diameter | 110 mm |
| Machine Accuracy Class | Class 1 (per GB/T 2611 & JB/T 7796-2005) |
| Net Weight | 90 kg |
Overview
The Jiubin JB-TB Manual Spring Tension and Compression Testing Machine is a mechanically actuated, force-displacement measuring system engineered for static mechanical characterization of helical, disc, leaf, conical, wave, constant-force, and custom-profile springs. It operates on the principle of direct load application via handwheel-driven screw mechanism, coupled with high-stability load cell transduction and precision linear displacement sensing. Designed in strict compliance with ISO 7500-1 (metallic materials — calibration of static uniaxial testing machines) and Chinese national standard JB/T 7796-2005 (Spring Tension and Compression Testing Machines — Technical Requirements), the JB-TB delivers repeatable, traceable measurements of spring force, deflection, and stiffness under controlled quasi-static loading conditions. Its robust cast-iron frame, hardened steel platens, and low-hysteresis load cell architecture ensure long-term dimensional stability and minimal thermal drift—critical for quality control environments where batch-to-batch consistency is mandated by automotive OEM specifications or medical device component suppliers.
Key Features
- Manual operation via calibrated handwheel enables precise, stepwise force application without motor-induced vibration or inertia effects—ideal for low-speed creep evaluation and fine-tuning of sensitive spring assemblies.
- Class 1 accuracy per JB/T 7796-2005 and GB/T 2611, verified through third-party calibration certificates traceable to CNAS-accredited laboratories.
- Dual-range digital display simultaneously shows real-time force (N) and displacement (mm), with programmable zeroing, peak hold, and unit switching (N/kgf/lbf).
- Modular platen configuration supports interchangeable fixtures for tension hooks, compression anvils, and specialized adapters for torsion springs, gas springs, and multi-stage composite units.
- Integrated data logging interface (RS-232) enables export of raw force-displacement pairs for post-processing in Excel, MATLAB, or statistical process control (SPC) software.
- Compliance-ready design includes audit trail support for GLP/GMP documentation workflows when paired with optional PC-based reporting software (sold separately).
Sample Compatibility & Compliance
The JB-TB accommodates a broad spectrum of metallic and elastomeric spring geometries: extension springs (hooked or looped ends), compression springs (ground/unground ends), Belleville washers, wave springs, laminated leaf springs, and nested coil assemblies. Its 270 mm maximum tension gap and 250 mm compression clearance accommodate springs up to 240 mm free length. The 110 mm diameter platens provide uniform load distribution across diameters ≤100 mm; optional auxiliary fixtures extend compatibility to flat springs ≥200 mm wide. All mechanical components meet RoHS Directive 2011/65/EU material restrictions. The instrument satisfies essential requirements of Machinery Directive 2006/42/EC for operator safety—including guarded handwheel operation, mechanical overload stop, and emergency release lever. Calibration intervals align with ISO/IEC 17025:2017 recommendations for force measurement equipment used in accredited testing laboratories.
Software & Data Management
While the JB-TB operates as a standalone manual tester, its RS-232 serial port supports integration with Windows-based data acquisition software (e.g., Jiubin TestSuite v3.2). This optional package provides automated test sequencing, customizable report templates (PDF/CSV), statistical analysis (Cp/Cpk, X-bar R charts), and electronic signature functionality compliant with FDA 21 CFR Part 11 Annex 11 requirements. Raw datasets include timestamp, sample ID, operator code, environmental temperature/humidity metadata, and calibration certificate reference numbers—enabling full traceability from raw measurement to final QC release decision. All firmware updates are delivered via secure USB flash drive with SHA-256 checksum verification.
Applications
- Automotive: Validation of suspension coil springs, clutch diaphragm springs, and fuel injector valve return springs against OEM engineering drawings (e.g., VW TL 52208, Ford WSS-M1A352-A2).
- Medical Devices: Mechanical verification of nitinol stent expansion forces, orthodontic archwire load-deflection curves (per ISO 15841), and surgical stapler spring actuation thresholds.
- Industrial Automation: Batch screening of linear actuator return springs, solenoid valve reset springs, and robotic gripper preload verification.
- Electronics: Characterization of contact force profiles for MEMS switch springs and battery terminal retention springs per IPC-J-STD-001.
- Academic Research: Fundamental studies of viscoelastic relaxation in polymer-composite springs and fatigue pre-screening prior to cyclic life testing.
FAQ
What standards does the JB-TB comply with for calibration and performance verification?
It conforms to JB/T 7796-2005, GB/T 2611, ISO 7500-1 Class 1, and JIS B7738-1993. Calibration certificates include uncertainty budgets per ISO/IEC 17025.
Can the JB-TB be used for both tensile and compressive testing on the same spring?
Yes—its symmetrical dual-platen design allows reversible mounting; tension tests require hook fixtures, compression tests use flat platens with centering alignment pins.
Is external power required for basic operation?
No—the manual handwheel drive requires no electricity. Only the digital indicator and optional PC interface require 24 V DC power (included AC adapter).
What maintenance schedule is recommended for sustained Class 1 accuracy?
Annual recalibration by an accredited lab is advised; biannual visual inspection of lead screw lubrication, platen parallelism, and load cell mounting bolts is required per maintenance log.
Does the machine support custom test protocols beyond standard spring stiffness calculation?
Yes—via optional TestSuite software, users can define multi-step sequences (e.g., preload → dwell → ramp → unload) with conditional pass/fail logic based on force or displacement thresholds.
