| 发明名称 |
Self-centering drill bit for hard or hardened materials |
| 摘要 |
<p>A self-centering drill bit for hard materials in the range 50 to 72 HRC has a tip describing an angle of 140[deg] plus or minus 5[deg] and three cutting edges. The drill penetrates to a maximum of ten times the depth of the drill diamter.</p> |
| 申请公布号 |
DE20312925(U1) |
申请公布日期 |
2003.11.20 |
| 申请号 |
DE2003212925U |
申请日期 |
2003.08.18 |
| 申请人 |
SCHMID, HARALD |
发明人 |
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| 分类号 |
B23B51/02;(IPC1-7):B23B51/02;B28D1/14 |
主分类号 |
B23B51/02 |
| 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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