GB594312A - Improvements in or relating to boring and countersinking tools - Google Patents
Improvements in or relating to boring and countersinking toolsInfo
- Publication number
- GB594312A GB594312A GB142645A GB142645A GB594312A GB 594312 A GB594312 A GB 594312A GB 142645 A GB142645 A GB 142645A GB 142645 A GB142645 A GB 142645A GB 594312 A GB594312 A GB 594312A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tool
- face
- point
- countersink portion
- cutting
- 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
- 230000001154 acute Effects 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/10—Bits for countersinking
- B23B51/108—Bits for countersinking having a centering drill
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling Tools (AREA)
Abstract
594,312. Drills and cutters. MAR CUS & CO., AKTIEBOLAG, and ERIKSSON, E. V. Jan. 17, 1945, No. 1426. [Class 83 (iii)] A boring and counter - sinking tool has a countersink portion of cylindrical form tapering towards a boring bit and having a cutaway portion defined by two planar surfaces which form cutting and trailing edges in the tapering portion, said surfaces forming an angle between them of at least ninety degrees and at least one of the surfaces forming an acute angle with the longitudinal axis of the tool. The tapered point 1 of the tool, Fig. 2, may be of semicircular section and merges into the countersink portion 8, the latter having an inclined helical face 9. The countersink portion is gapped at 5 ; an oblique plain face 10 intersecting the helical face 9 to provide a curved cutting edge 3 with a cutting angle negatively raked. The other face 5 of the gap is also plain and may interset the tool axis to correspond with the flat face of the point. Alternatively, the face of the point may be hollowed out to provide relief. In another form of tool the point is of normal cylindrical twist and fluted form while the countersink portion is bevelled off at 10 on both sides of the tool axis to produce the cutting and trailing edges. In this form the countersink portion comprises a split sleeve which may be pushed over the boring bit la and gripped in a holder.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE464909D BE464909A (en) | 1941-10-14 | ||
| NL69425D NL69425C (en) | 1941-10-14 | ||
| US572476A US2529143A (en) | 1941-10-14 | 1945-01-12 | Tool for boring and countersinking wood |
| DEM6873D DE896713C (en) | 1941-10-14 | 1945-01-14 | Wood drill bit with point and countersink |
| CH260921D CH260921A (en) | 1941-10-14 | 1945-01-24 | Drill. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB594312A true GB594312A (en) | 1947-11-07 |
Family
ID=1626819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB142645A Expired GB594312A (en) | 1941-10-14 | 1945-01-17 | Improvements in or relating to boring and countersinking tools |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB594312A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2246530A (en) * | 1990-08-01 | 1992-02-05 | Richard Louis Mitchell | Countersink collar |
| GB2393676A (en) * | 2002-10-02 | 2004-04-07 | James Philip Turner | Bit attachment adapted to create a countersink chamfer |
-
1945
- 1945-01-17 GB GB142645A patent/GB594312A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2246530A (en) * | 1990-08-01 | 1992-02-05 | Richard Louis Mitchell | Countersink collar |
| GB2393676A (en) * | 2002-10-02 | 2004-04-07 | James Philip Turner | Bit attachment adapted to create a countersink chamfer |
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