JPS6144194B2 - - Google Patents
Info
- Publication number
- JPS6144194B2 JPS6144194B2 JP55057753A JP5775380A JPS6144194B2 JP S6144194 B2 JPS6144194 B2 JP S6144194B2 JP 55057753 A JP55057753 A JP 55057753A JP 5775380 A JP5775380 A JP 5775380A JP S6144194 B2 JPS6144194 B2 JP S6144194B2
- Authority
- JP
- Japan
- Prior art keywords
- cutter
- main
- auxiliary
- carbide tip
- cutting edge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000005553 drilling Methods 0.000 claims description 18
- 238000009412 basement excavation Methods 0.000 description 19
- 239000011435 rock Substances 0.000 description 15
- 239000002689 soil Substances 0.000 description 12
- 239000010410 layer Substances 0.000 description 10
- 238000007373 indentation Methods 0.000 description 8
- 239000004576 sand Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5775380A JPS56156384A (en) | 1980-05-02 | 1980-05-02 | Bit for vertical hole excavation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5775380A JPS56156384A (en) | 1980-05-02 | 1980-05-02 | Bit for vertical hole excavation |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56156384A JPS56156384A (en) | 1981-12-03 |
JPS6144194B2 true JPS6144194B2 (de) | 1986-10-01 |
Family
ID=13064636
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5775380A Granted JPS56156384A (en) | 1980-05-02 | 1980-05-02 | Bit for vertical hole excavation |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56156384A (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6216161B2 (ja) * | 2013-06-07 | 2017-10-18 | 東日本旅客鉄道株式会社 | ビット装置 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5317601U (de) * | 1976-07-26 | 1978-02-15 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54130705U (de) * | 1978-03-03 | 1979-09-11 |
-
1980
- 1980-05-02 JP JP5775380A patent/JPS56156384A/ja active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5317601U (de) * | 1976-07-26 | 1978-02-15 |
Also Published As
Publication number | Publication date |
---|---|
JPS56156384A (en) | 1981-12-03 |
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