Cavity Preparations | University of Toronto Faculty
2021-4-26 · A rotation speed of 300’000 rpm is recommended for burs up to No .ISO 01 0. For sizes ISO 01 2 and above, the recommended speed is between 150’000 and 200’000 rpm. Regardless of their diameter, burs which have an active part that is longer than 8mm must never be used at speeds in excess of 200’000 rpm.
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