Computerised STM Series spring testers for automated compression, tension, and cyclic load testing of springs, components, and sub-assemblies — from 50 kgf to 100,000 kgf capacity.
STM Series
The AGMPL STM Series are fully computerised spring testing machines designed for automated testing of compression and extension springs, materials, components, sub-assemblies, and assemblies. Available in capacities from 50 kgf to 100,000 kgf, they cover everything from small valve springs to large industrial and railway coil springs.
A high-stiffness loading frame, backlash-free precision ball screws, and vector-control VFD drive combine to deliver 0.25% FSR accuracy with smooth crosshead travel across the full speed range of 0.1 to 500 mm/min.
In Action
Specifications
| Model | Max Load | Resolution | Max Travel | Accuracy | Speed Range |
|---|---|---|---|---|---|
| STM-50 | 50 kgf | 0.01 kgf | 250 / 500 mm | 0.25% FSR | 0.1 – 500 mm/min |
| STM-500 | 500 kgf | 0.01 kgf | 250 / 500 / 1000 mm | 0.25% FSR | 0.1 – 500 mm/min |
| STM-1000 | 1,000 kgf | 0.1 kgf | 250 / 500 / 1000 mm | 0.25% FSR | 0.1 – 500 mm/min |
| STM-5000 | 5,000 kgf | 0.1 kgf | 250 / 500 / 1000 mm | 0.25% FSR | 0.1 – 500 mm/min |
| STM-10000 | 10,000 kgf | 1 kgf | 500 / 750 / 1000 mm | 0.25% FSR | 0.1 – 500 mm/min |
| STM-20000 | 20,000 kgf | 1 kgf | 500 / 750 / 1000 mm | 0.25% FSR | 0.1 – 300 mm/min |
| STM-50000 | 50,000 kgf | 5 kgf | 500 / 750 / 1000 mm | 0.5% FSR | 1 – 300 mm/min |
| STM-100K | 100,000 kgf | 10 kgf | 750 / 1000 / 2000 mm | 0.5% FSR | 1 – 300 mm/min |
STM-50: Table Top · STM-500 and above: Dual Column Floor Standing
Custom MachineTable Top Models
Compact bench-top spring testers for small springs, clips, and miniature components — ideal for QC labs and production lines.
STM-20
Standard Equipment
Intelligent plug-and-play load cell recognition — no manual range configuration required.
Precision ground ball screws eliminate backlash for smooth, repeatable crosshead motion.
Rigid welded steel loading frame minimises deflection under full rated load.
Advanced variable-frequency drive delivers smooth speed control from 0.1 mm/min across the full load range.
Automatically detects initial contact with the specimen before the test begins — no manual zeroing needed.
Auto-return function with configurable approach, test, and return speeds for faster cycle times.
Robust operator panel with manual jog, emergency stop, and interlock controls for shop floor use.
Switch between fully automated PC control and manual operation for setup and calibration.
Interlocked safety door and electronic overload protection prevent damage to specimens and machine.
Test reports exported as PDF, Excel, or CSV with load-deflection curves and statistical summaries.
Optional
Hardened flat platens for uniform load distribution across spring coils.
For testing extension springs in tensile mode.
Suitable for cable, wire, and strand pull testing.
Self-tightening grip for flat or round tensile specimens.
For connector, terminal, and fastener pull-out tests.
Tilts the compression platen to test springs under angled or offset load conditions.
High-accuracy displacement sensor for precise deflection measurement independent of crosshead travel.
Product Range
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After Sales
On-site and in-house calibration of testing machines and sensors
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Application engineering, test method development, and lab planning
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Safe disassembly, transport, and re-commissioning of testing machines
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Modernise legacy or imported test rigs with new controls and sensors
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Annual maintenance contracts (AMC) for all testing machines
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Tell us your spring type, load range, and travel — we'll recommend the right STM model and quote quickly.
Trade Shows & Exhibitions
Upcoming Events 2026Tire Technology Expo
Deutsche Messe, Hannover, Germany
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TyreXpo Asia Bangkok
BITEC, Bangkok, Thailand
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Automotive Engineering Exposition 2026 Yokohama
PACIFICO Yokohama, Japan
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Automechanika Dubai
Dubai Exhibition Centre, Expo City Dubai
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