To provide a drill plate capable of being centralized in a base body without using an adjustable stop element and transmitting high operation torque without being damaged.
A fastening slot extending to a material of the base body is arranged at the bottom of a centralizing groove. The centralizing groove is connected by at least two opposed mounting jars. At least two stop surfaces opposed in a radial direction are arranged in regions of the mounting jars to be centralized in contact with the drill plate. Fastening connections are formed by a mounting screw for fastening the drill plate in the centralizing grooves 2 and 3. To promote transfer of operation torque from the drill plate to the base body and to facilitate handling, at least two centralizing fins are opposed in the radial direction in relation to a horizontal direction center shaft. The centralizing fins are in contact with the corresponding stop surfaces arranged on corresponding fastening jars of the base body.
STUDER HARRY
| JPS6133806A | 1986-02-17 | |||
| JP2002522233A | 2002-07-23 |
Shinsuke Onuki
Tadashige Ito
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