| 摘要 |
PURPOSE: A plasma/gas cutter combined use compass is provided to improve the structure of a bearing installed between a main body and an insertion guide tube. CONSTITUTION: A plasma/gas cutter combined use compass comprises a main body(10), a bearing(20), an insertion guide tube(40), a wheel, a pivot, and a big circle pivot. A receiving space(11) is formed at the center of the main body, and extension parts(12,13) and bent parts(14,15) are formed at both sides of the main body. The bearing is installed in a receiving space of the main body. The insertion guide tube is installed in the bearing. The wheel, pivot and big circle pivot are installed in the extension parts and bent parts. The bearing has an outer ring, an inner ring and a bearing ball between the rings.
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