Checking size

This is carried out in accordance with specific internal working instructions and/or drawings supplied by the customer using measuring instruments that are correctly identified and subject to periodic calibration checks.

checking hardness

Hardness measurements are carried out using electronic or mechanical hardness testers that are correctly identified and subject to periodic calibration checks. Shore A and D scale measurements. Standard tolerance +/- 5 shore, close tolerance +/- 2 shore.

checking roughness

Some special processes require especially accurate surface finishes and only by checking with an electronic roughness tester ensures a correct evaluation of the degree of finish achieved.

checking balancing

Checking dynamic balancing and correcting any imbalances is not a standard check but is carried out on specific request of the customer.

insulation test

A discharge of 15,000 Volts makes it possible to check the perfect electrical insulation of the coating. This test is carried out as standard on all rollers used for “corona treatment”.

scintilographic test

Often the coating has to protect the metal structure from the corrosive action of acid or highly corrosive baths: this test guarantees the water resistance of the coating especially in the critical join areas between the covered shell, the heads and collar.