Spring Tester

The Testometric AT-S and CT- S models are a range of dedicated spring testers based on the AT and CT Universal testing machines. They have internal capacity to store controlled test methods for several thousand spring types.
These test methods are stored and recalled for use under a simple spring reference. Each method will control the whole test automatically taking the spring to desired positions and producing the calculations and results required.


The system applies a fixed compression force to the spring and secondary load cells measure the lateral forces induced to produce vector diagrams for the spring in the carriage to ensure correct leveling characteristics.
The large full colour display shows a real time load deflection plot of each test and displays, test results including free length, load at various deflection, deflections at various loads, various spring rates etc. Continually updated statistics also appear on screen giving highest, lowest and average value for each calculation.
The system creates an ideal spring tester for either research or production testing. It is particularly suited to a factory floor environment in that it can produce a full test report without a PC.
Machines are available from 100N to 600kN.

Force Measurement

Universally Calibrated, better than Grade 0.5 EN 7500-1, DIN 51221 ASTM E-4. AFNOR A03-501. Range 0.4% to 100% minimum. Automatic identification of load cell. Resolution 1 part in 500000 with autoranging. Electronic load cell protection.

Extension Measurement

Full frame length to 0.001mm. Resolution 0.001 min. Accuracy 0.01mm. Absolute, relative and auxiliary modes mm, inch and percent. Programmable extension limits.

Speed Control

Drive system temperature and current protection. Positional jog speed 0.001mm/min to maximum. Speed setting increments 0.001mm/min.

Load Frame

Rigid frame, using dual slide crosshead guidance system and rigid extruded support column. Frame stiffness 5kN/mm plus K factor facility built-in. Re-circulating ball screw with bellows. Electronic limit trips, total travel trips and customer programmable safety stops. Rubber mat front protection.


Comprehensive winTest™ Analysis universal windows software covering tensile, compression, peel, shear, tear, cyclic, creep and multi stage testing. It includes a wide range of industry standard test methods and facility to create and store an unlimited number of further test methods. There is automated storage of all test data and ease of export to other software packages such as word, excel, access and SPC systems for enhanced report generation.