FIELD: drilling. SUBSTANCE: boring drill bit has body with grooves made on working butt and mounted in them solid-alloy cutting tools, overlapping butt of drill bit. Front surface of solid-alloy cutting tool is made concave and contacting it wall of groove is correspondingly made salient. Lower butt of cutting tool has bulge, made on the side of borehole forming surface. EFFECT: boring drill bit is used for drilling. 2 cl, 5 dwg
Title | Year | Author | Number |
---|---|---|---|
DRILL BIT | 0 |
|
SU1051208A1 |
DRILLING CROWN BIT | 0 |
|
SU1528890A1 |
CROWN BIT | 0 |
|
SU1640342A1 |
CROWN BIT | 2012 |
|
RU2489563C1 |
BORE BIT | 2008 |
|
RU2359101C1 |
CROWN BIT | 0 |
|
SU1553645A1 |
CROWN DRILLING BIT | 2007 |
|
RU2332556C1 |
DRILL BIT | 0 |
|
SU1120736A1 |
DRILLING DIAMOND CROWN BIT | 0 |
|
SU1640340A1 |
DRILL CROWN | 0 |
|
SU625016A1 |
Authors
Dates
1995-07-09—Published
1992-06-23—Filed