A knife detecting and sharpening system can be installed in a machine base of a splitting machine and adjacent to a band knife, which is an annular loop and is driven by two knife-driving wheels, and adjacent to a wheel shaft of one of the two knife-driving wheels. The system is controlled by a computer of the splitting machine and comprises a resistance detector, connected to the wheel shaft and electrically connected to the computer, and an electric sharpening device, which is mounted inside the machine base and is controlled by the computer to sharpen the band knife's blade, to be withdrawn from the band knife, and to automatically clean dust generated during sharpening the blade. The resistance detector detects a resistance during sharpening and transmits it to the computer, which can control the electric sharpening device operating a sharpening mode or a stop-sharpening mode based on the resistance.

The tip sharpener is a sharpening tool for the tips of instruments, such as the tips of ultrasonic scalers, as a non-limiting example. The tip sharpener includes a body with opposed first and second ends, and with a conical recess formed within the body such that a vertex of the conical recess is closer to the first end than to the second end. A mouth of the conical recess is opposed to the vertex of the conical recess and is formed in the second end of the body. At least one radially extending vent is formed in an outer surface of the body and is in open communication with the conical recess. The conical recess is adapted for receiving a tip of an instrument to be sharpened therein. In use, the tip is inserted with respect to the conical recess to a desired depth and rotated within the conical recess.

The tip sharpener is a sharpening tool for the tips of instruments, such as the tips of ultrasonic scalers, as a non-limiting example. The tip sharpener includes a body with opposed first and second ends, and with a conical recess formed within the body such that a vertex of the conical recess is closer to the first end than to the second end. A mouth of the conical recess is opposed to the vertex of the conical recess and is formed in the second end of the body. At least one radially extending vent is formed in an outer surface of the body and is in open communication with the conical recess. The conical recess is adapted for receiving a tip of an instrument to be sharpened therein. In use, the tip is inserted with respect to the conical recess to a desired depth and rotated within the conical recess.