FIELD: rock-breaking drill tools. SUBSTANCE: invention can be used while drilling blast holes in rocks in open pits, mines and in case of deep drilling. Drill disc bit includes body with threaded joining nipple in upper part and rock- breaking rotary bits fixed in claws of attachment axle in lower part. Attachment axle of rock-breaking rotary bit has shape of polyhedron in section and is fixed with one end in claw by means of threaded connection with check-nut for radial turn. Cone-shaped bushing which internal conduit has eccentricity is put on axle. Bushing is fixed on axle with the help of locking threaded ring. Working surfaces of rock- breaking discs are of triangular or wedge shape. EFFECT: simplified design of drill bit, increased drilling efficiency. 1 cl, 5 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| DISK BIT OF MILLING TYPE | 1996 |
|
RU2116427C1 |
| CUTTING-SHEARING DRILLING BIT | 1999 |
|
RU2178057C2 |
| BORING CUTTER | 2002 |
|
RU2228423C2 |
| ACTUATING MEMBER OF CONTINUOUS MINER | 2002 |
|
RU2209975C1 |
| ROLLER-CUTTER DRILLING BIT | 2001 |
|
RU2182213C1 |
| DISK BIT OF MILLING TYPE | 1996 |
|
RU2117130C1 |
| DRILLING ROLLER BIT (VARIANTS) | 2003 |
|
RU2257457C1 |
| METHOD OF RECONDITIONING OF WORN-OUT ROLLER-CUTTER DRILLING BITS INTO DRAG DRILLING BITS | 2001 |
|
RU2208121C2 |
| METHOD OF SECONDARY USE OF DRILLING BITS | 1998 |
|
RU2149974C1 |
| DRILLING CHISEL WITH VARIABLE ROCK-DESTROYING ARMAMENT | 2003 |
|
RU2250344C1 |
