JPS63197013U - - Google Patents
Info
- Publication number
- JPS63197013U JPS63197013U JP1869388U JP1869388U JPS63197013U JP S63197013 U JPS63197013 U JP S63197013U JP 1869388 U JP1869388 U JP 1869388U JP 1869388 U JP1869388 U JP 1869388U JP S63197013 U JPS63197013 U JP S63197013U
- Authority
- JP
- Japan
- Prior art keywords
- tip
- drill
- cutting surfaces
- blade
- twist
- 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.)
- Pending
Links
- 238000005553 drilling Methods 0.000 description 1
Landscapes
- Drilling Tools (AREA)
Description
第１図は従来品を示す側面図、第２図は穿穴状
態を示す正面図、第３図は本考案の実施例に係る
深穴用ツイストドリルを示す正面図である。
１…刃部、２…先端部、１０…深穴用ツイスト
ドリル、１１…刃面、１２，１２ａ…凹部、１３
…刃先、１４…フリユート。
FIG. 1 is a side view showing a conventional product, FIG. 2 is a front view showing a drilling state, and FIG. 3 is a front view showing a twist drill for deep holes according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Blade part, 2... Tip part, 10... Twist drill for deep holes, 11... Blade surface, 12, 12a... Recessed part, 13
...Blade tip, 14...Flyute.
Claims (1)
続的に変化させた深穴用ツイストドリルにおいて
、前記刃部の先端部の両刃面に、切刃長さに対し
て１／４〜１／８の一定幅で深さが一定の両凹部
を設け、かつドリル径が１．０mm以下であつて、
前記両凹部は前記先端部の両刃面の両縁間に連続
しドリル外周を避けて形成されるとともに前記先
端部の両刃面上非対称で互いに重複しない位置に
あることを特徴とする深穴用ツイストドリル。 In a deep hole twist drill in which the helix angle of the entire length of the blade is continuously changed from the tip to the rear end, a screw is applied on both cutting surfaces of the tip of the blade to 1/4 to 1/4 of the length of the cutting edge. Both recesses are provided with a constant width of 1/8 and a constant depth, and the drill diameter is 1.0 mm or less,
A twist for deep holes, characterized in that the two concave portions are formed continuously between both edges of both cutting surfaces of the tip, avoiding the outer periphery of the drill, and are located asymmetrically on both cutting surfaces of the tip and at positions that do not overlap with each other. Drill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1869388U JPS63197013U (en) | 1988-02-17 | 1988-02-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1869388U JPS63197013U (en) | 1988-02-17 | 1988-02-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63197013U true JPS63197013U (en) | 1988-12-19 |
Family
ID=30812597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1869388U Pending JPS63197013U (en) | 1988-02-17 | 1988-02-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63197013U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4913973B1 (en) * | 1969-03-27 | 1974-04-04 |
-
1988
- 1988-02-17 JP JP1869388U patent/JPS63197013U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4913973B1 (en) * | 1969-03-27 | 1974-04-04 |
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