| 摘要 |
PURPOSE: A chamfering tool to be connected to a portable electric tool is provided to achieve precise chamfering of sharply punched drill holes in a precise measure by mounting a replaceable chamfering bite and a bearing to support the inside surface of the punched drill holes. CONSTITUTION: A chamfering tool(100) includes a main body(10) and a connecting part(19)having a rotation shaft is fixed at a center portion of the main body(10) to be inserted with a rotation shaft of a portable electric tool, a bearing mounting portion(16) downwardly formed in the lower center portion of the main body(10) to rotatively mounting a bearing (17), a downward slanted portion912) formed in the lower part of the main body(10), chip discharging grooves(14) and byte fixing surfaces(14a) formed on both spherical surface of the main body(10), and bytes(15) fixed on the byte fixing surfaces(14a) by fixing screws(21).
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