ABRASIVE CUT-OFF WHEELS AND METHODS OF MAKING THE SAME
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United States of America Patent
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Jul 4, 2024
app pub date -
Apr 4, 2022
filing date -
Apr 30, 2021
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Abstract
Methods of making thin abrasive cut-off wheels with low pinhole occurrence are disclosed. An abrasive cut-off wheel has a thickness of less than or equal to 1.6 millimeters. It comprises at least one reinforcing scrim and abrasive particles retained in a phenolic binder. The abrasive particles comprise first and second triangular abrasive platelets. The first triangular platelets have a first average maximum side length and a first total weight. The second triangular platelets have a second average maximum side length and a second total weight. The first and second total weights combined comprise at least 30 weight percent of the abrasive cut-off wheel. The ratio of the first average maximum side length to the second average maximum side length is 1.25:1 to 5:1, and the ratio of first total weight to the second total weight is 1:2 to 5:1.
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