Similar to all other dynamic machine components, screws and barrels have
not unlimited life and are subject to wear. There is no generally applicable
description for screw wear. Wear occurs in many different forms and is
subject to many causes.
Wear can be described in a qualitative manner. A worn screw and barrel
will lead to less output as well as degradation of the quality of the
Wear can also be quantified. Using appropriate measuring equipment, the wear of the screw and the barrel can be accurately measured up to one tenth or one hundredth of a millimetre.
Euro-Stel is specialised in wear measurements.
Depending on the situation, we can measure the wear on site at the customer’s or ask the customer to send us the components. In both cases, the screw and the barrel must be clean and the screw must be removed from the barrel. If the measurement is carried out at the customer’s, the machine must be cold as well, in order to protect our collaborators and our measuring equipment on the one hand and to avoid measuring deviations on the other hand.
We establish a detailed report for each wear measurement, listing the
measured wear in the different zones of the screw and the barrel. Our
experienced collaborators check the diameters as well as the core diameter,
the flank radius, the degree of flash and the overall condition of the
screw. Their findings are also included in the report. Finally, we indicate
if the screw and barrel need overhauling and the technical feasibility
of this process.
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