JPS6239913U - - Google Patents
Info
- Publication number
- JPS6239913U JPS6239913U JP13220185U JP13220185U JPS6239913U JP S6239913 U JPS6239913 U JP S6239913U JP 13220185 U JP13220185 U JP 13220185U JP 13220185 U JP13220185 U JP 13220185U JP S6239913 U JPS6239913 U JP S6239913U
- Authority
- JP
- Japan
- Prior art keywords
- drill
- cutting edge
- line
- straight
- utility
- 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 claims 1
Landscapes
- Drilling Tools (AREA)
Description
第１図は本考案の実施例のドリル切刃正面図、
第２図はドリル全体の側面図、第３図は従来のド
リルの切刃正面図、第４図、第５図は本考案の他
の実施例ドリルのイ切刃正面図、ロ刃先側面図で
ある。
１：ストレートシヤンク、２：刃先径部、３：
刃先正面部、４：切刃、５：マージン、６：チゼ
ルエツジ、７：逃げ面。
FIG. 1 is a front view of the drill cutting edge of an embodiment of the present invention.
Fig. 2 is a side view of the entire drill, Fig. 3 is a front view of the cutting edge of a conventional drill, Figs. It is. 1: Straight shank, 2: Cutting edge diameter, 3:
Front part of the cutting edge, 4: Cutting edge, 5: Margin, 6: Chisel edge, 7: Flank surface.
Claims (1)
て、マージン側の切刃をドリル回転方向に対し凸
形の切刃形状としたことを特徴とするプリント基
板用穴明けドリル。 (2) 実用新案登録請求の範囲第１項記載のドリ
ルにおいて、ドリル回転方向に対する凸状切刃が
、直線切刃の線に対して２つの角度を形成する直
線からなることを特徴とするプリント基板用穴明
けドリル。 (3) 実用新案登録請求の範囲第１項記載のドリ
ルにおいて、ドリル回転方向に対する凸状切刃が
直線切刃の線に対し一つの角度の直線とマージン
部につながる曲線Ｒからなることを特徴とするプ
リント基板用穴明けドリル。[Scope of Claim for Utility Model Registration] (1) A hole for a printed circuit board, characterized in that the cutting edge on the margin side has a convex cutting edge shape with respect to the drill rotation direction when viewed from the front of the cutting edge of the twist drill cutting edge. Morning drill. (2) In the drill according to claim 1 of the utility model registration claim, the print is characterized in that the convex cutting edge in the rotational direction of the drill consists of straight lines forming two angles with respect to the line of the straight cutting edge. Drill for drilling holes in circuit boards. (3) The drill according to claim 1 of the utility model registration claim, characterized in that the convex cutting edge in the rotational direction of the drill consists of a straight line at an angle to the line of the straight cutting edge and a curved line R that connects to the margin part. Hole drill for printed circuit boards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13220185U JPS6239913U (en) | 1985-08-28 | 1985-08-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13220185U JPS6239913U (en) | 1985-08-28 | 1985-08-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6239913U true JPS6239913U (en) | 1987-03-10 |
Family
ID=31031361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13220185U Pending JPS6239913U (en) | 1985-08-28 | 1985-08-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6239913U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007030166A (en) * | 1998-10-27 | 2007-02-08 | Nachi Fujikoshi Corp | Twist drill |
-
1985
- 1985-08-28 JP JP13220185U patent/JPS6239913U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007030166A (en) * | 1998-10-27 | 2007-02-08 | Nachi Fujikoshi Corp | Twist drill |
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