CORE DRILL

A plurality of chip evacuating grooves ( 16, 26, 36, 46a, 46b ) in a vertical direction in parallel with a rotational axis of a core main body ( 14 ) are formed at an outer peripheral face of the core main body ( 14 ) in a circumferential direction from a lower end portion to an upper end portion of...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	HIRANUMA, TOSHIO, KOSHIBA, TOMOHIRO, TSUTSUMI, KOUICHI, ISHIZEKI, MASAKAZU
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BORING MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS TRANSPORTING TURNING WORKING CEMENT, CLAY, OR STONE WORKING STONE OR STONE-LIKE MATERIALS
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