JPH0329213U

JPH0329213U -

Info

Publication number: JPH0329213U
Application number: JP8878489U
Authority: JP
Priority date: 1989-07-28
Filing date: 1989-07-28
Publication date: 1991-03-22

Description

[Brief explanation of drawings]

第１図は本考案の一実施例を示す断面説明図、
第２図は第１図の要部拡大図、第３図は第２図の
右側面図、第４図は第１図の−線に沿う断面
図、第５図は第１図の−線に沿う断面図、第
６図は従来の振れ止め案内装置の一例を示す断面
説明図、第７図は第６図の−線に沿う断面図
、第８図は第６図の−線に沿う断面図、第９
図は第６図の−線に沿う断面図である。２……チヤツク、３……案内ヘツド、４……ブ
ツシユ、７……ガイドスリーブ、１２……ガンド
リル、１２ａ……シヤンク部、１２ｂ……刃先部
、１２ｃ……ドリルシヤフト部、１３……ガイド
ブツシユ、１６……ボールベアリング、Ｈ……深
穴、Ｗ…ワーク。 FIG. 1 is a cross-sectional explanatory diagram showing an embodiment of the present invention;
Figure 2 is an enlarged view of the main part of Figure 1, Figure 3 is a right side view of Figure 2, Figure 4 is a sectional view taken along the - line in Figure 1, and Figure 5 is the - line in Figure 1. FIG. 6 is a cross-sectional explanatory diagram showing an example of a conventional steady rest guide device, FIG. 7 is a cross-sectional view taken along the - line in FIG. 6, and FIG. 8 is a cross-sectional view taken along the - line in FIG. 6. Cross section, No. 9
The figure is a sectional view taken along the - line in FIG. 6. 2... Chuck, 3... Guide head, 4... Bush, 7... Guide sleeve, 12... Gun drill, 12a... Shank part, 12b... Cutting edge part, 12c... Drill shaft part, 13... Guide bush , 16...ball bearing, H...deep hole, W...work.

Claims

[Claims for Utility Model Registration] A structure in which a drill shaft portion having a uniform irregular cross-sectional structure between a shank portion and a cutting edge portion of a gun drill held by a chuck is guided and supported by a guide head, the drill shaft portion comprising: A steady rest guide device for a gun drill, characterized in that a rubber guide bush is slidably press-fitted into the gun drill, and the guide bush is rotatably supported by a guide head via a bearing.