The method conforms to ASTM D5963 / ISO 4649. This method enables comparative tests for the control of the uniformity of a specific material. The achieved test results provide important parameters in respect to the wear of elastomers in practical use.

Process
The abrasion resistance is measured by moving a test piece across the surface of an abrasive sheet mounted to a revolving drum, and is expressed as volume loss in cubic millimeters or abrasion resistance index in percent. For volume loss, a smaller number indicates better abrasion resistance, while for the abrasion resistance index, a smaller number denotes poorer abrasion resistance. The DIN Abrasion tester can also be used for comparative measurements on other materials such as plastics, chalk or painted surfaces.

Operation of DIN Abrasion Tester ( DIN Abraser / Abrader)

MICRO VISION
DIN Abrasion tester (DIN Abraser / Abrader) is a user friendly and does not require skilled personnel to be operated. The abrasion distance is easily selected by an adjusting screw. The constant pressure on the sample is set by using a variety of loading weights. If the test requires the sample to be rotated around its own axis, this rotation is easily activated by the operator. The abrasive sheet is attached to the drum with three strips of a double-sided adhesive, which are placed approximately every 120° around the circumference of the rotating drum. The abrasive sheet is blunted to the required degree of abrasiveness with the help of the included steel cylinder.
In order to comply with the standard, a minimum of three samples need to be tested and the result calculated as an average value. The test specimens can be vulcanized directly in a mould or cut from a sheet of vulcanized rubber plate with the help of a circular cutting tool. The sample is inserted into the sample holder so that 2 mm of the material remain exposed. The exposure is adjusted with a adjusting gauge. After placing the specimen mounted in the sample onto the abrasive sheet, the START-button is pressed and the test will be performed according to standard automatically. The test specimens are weighed before and after the test to an accuracy of 1 mg. The abrasiveness of the abrasive sheet is also tested with three tests before and after each test series, using rubber comparison samples.

Accessories for DIN Abrasion Tester (DIN Abraser / Abrader)

Abrasive Sheet
An abrasive sheet will abrade approximately 210 ... 250 mg from the mass of a comparison sample. This abrasion should be reduced to approximately 210 ... 220 mg by abrading a steel sample across the entire width of the delivered drum once or twice. The sheet can be used as long as the abrasive loss of a comparison rubber sample is less than 180 mg. It has to be replaced then.

Rubber Comparison Sample Sheet
The rubber comparison sample sheet serves for the determination of the degree of abrasiveness in compliance with ISO 4649 (Formerly DIN 53516). It is produced of a special mixed rubber. Each plate has a dimension of approximately 186 mm x 186 mm and enables the production of about 100 comparison samples of a thickness of 8 mm. Consists of a transparent plastic cover.
 

Technical Data