Closed-loop hydraulic systems for static load-deflection testing of leaf springs — automotive suspension, heavy commercial vehicle, and railway applications. Adjustable trolley spacing accommodates a wide range of spring lengths.
LSTM Series
The AGMPL LSTM Series are closed-loop hydraulic leaf spring testers built on a floor-standing rigid steel frame. Designed for static and quasi-static load-deflection characterisation of multi-leaf and parabolic springs for passenger cars, commercial vehicles, and railway bogies.
Two load cells per machine — a full-capacity cell for high-force ranges and a precision cell for low-force work — ensure accurate measurement at both ends of the spring's load-deflection curve.
Technical Data
LSTM-100-250-125-H
LSTM-200-250-125-H
| Parameter | Value |
|---|---|
| Type | Closed-loop hydraulic; floor-standing rigid structure |
| Max Force — LSTM-100 | 100 kN |
| Max Force — LSTM-200 | 200 kN |
| Table Size — LSTM-100 | 250 × 2500 mm |
| Table Size — LSTM-200 | 400 × 2500 mm |
| Distance Between Trolleys | 500 – 2200 mm (settable) |
| RAM Stroke | 250 mm (larger stroke machines available) |
| Max Pressing Speed | 250 mm/min |
| Compression Plates | One pair, 250 mm diameter (supplied) |
| Load Cell Accuracy | ±0.05% of F.S. |
| Deflection Measurement | LVDT — 250 mm FSR, resolution 0.1 mm |
| Hydraulic Control | Proportional direction control valve; unloader valve; pressure line filter; return line filter; air-cooled oil cooler |
| Power Supply | 3-phase, 415 V, 50 Hz, 7.5 kW + 1-phase, 230 V, 50 Hz, 2 kW |
Specifications subject to change as a result of continuous development. Higher-capacity and longer-stroke models available on request.
Standard Equipment
Proportional direction control valve with servo amplifier delivers precise, repeatable ram displacement and force control throughout the test cycle.
Each machine ships with two load cells — a full-capacity cell for high-force tests and a precision cell for low-force measurements — covering the complete test range with a single machine.
Support trolleys adjust from 500 mm to 2200 mm to accommodate leaf springs of different eye-to-eye lengths, from light automotive to heavy commercial vehicle springs.
Live force-deflection curve displayed on the computer screen throughout the test. Data stored in files for off-line viewing and test report generation.
Precision LVDT with 250 mm full-stroke range and 0.1 mm resolution measures true spring deflection independent of hydraulic actuator position.
Test setup files can be created and saved for different spring products. Load a saved setup and run the next batch without re-entering parameters.
What's Included
Product Range
50 kgf – 100,000 kgf
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±10 kN · up to 4 Hz
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Bench-top, portable
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Clutch applications
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Who Uses Our Leaf Spring Testers?
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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, eye-to-eye length, and load range — we'll recommend the right LSTM model and quote quickly.
Trade Shows & Exhibitions
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Deutsche Messe, Hannover, Germany
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