发明名称 |
BORRNINGSANORDNING FOER FRAMSTAELLNING AV BORRHAOL MED UNDERSKAERNING |
摘要 |
A tool for drilling a cylindrical hole with an enlarged end undercut portion comprises a shank with cutting edges and a drill collet screwed to the shank by a knuckle thread. The collet is provided with a stop collar having a semispherically-shaped face supported in a matingly configurated recess provided in a stop plate so as to form a swivel bearing. A portion of the collet is closed by a bell connected to the stop plate and formed with a central hole to receive the shank of the tool. |
申请公布号 |
FI71518(B) |
申请公布日期 |
1986.10.10 |
申请号 |
FI19810002223 |
申请日期 |
1981.07.15 |
申请人 |
FISCHER ARTUR |
发明人 |
FISCHER ARTUR |
分类号 |
B28D1/14;B23B41/06;B23B51/00;B23Q11/00;E21B7/28 |
主分类号 |
B28D1/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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