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US20130180784 |
ROCK DRILL BIT AND A DRILLING ASSEMBLY FOR PERCUSSIVE ROCK DRILLING
A rock drill bit for percussive drilling includes a bit head attached at an end of a drill element of a drilling assembly. The bit head has a diameter larger than that of the drill element. The... |
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US20130180785 |
ROCK DRILL BIT FOR PERCUSSIVE DRILLING AND A ROCK DRILL BIT BUTTON
A button and a rock drill bit for percussive drilling including a bit head attached at an end of a drill element of a drilling assembly. The bit head has at a front end, as seen in the intended... |
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US20070119624 |
Roof drilling improvements
The invention is embodied in a heavy duty drill bit for hard/soft rock drilling comprising a high fatigue resistant, high alloy steel bit body having a PCD cutter element of super hard material... |
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US20060196699 |
Modular kerfing drill bit
A modular kerfing rock drilling bit (10) is presented. Drill bit (10) comprises a bit body (12) having a connection (14) for attachment to a drill string member. A base portion (16) below the... |
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US20080110679 |
Drill with a hard material drilling head
A one-piece drilling head (4) which is to be secured, in a material-locking manner, at an end of a helical shaft of a drill, is formed of hard material and includes four radially extending, in a... |
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US20160090791 |
PERCUSSIVE ROCK DRILL BIT
A percussive rock drill bit includes a head provided at one end of a rearwardly projecting skirt. The head has an outer collar that defines, in part, a rearwardly projecting recess formed in the... |
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US20080149399 |
Rotary percussion drill with a hard material bit
A rotary-percussion drill, includes a hard material bit (2, 2′) having at least one cutting edge (3, 3′), and a shaft having an end (7, 7′) with an axial base surface (6, 6′) provided with a... |
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US20080245220 |
Percussion Mechanism and at Least Percussively-Operated Hand Machine Tool With a Percussion Mechanism
The invention relates to a percussion mechanism for an at least percussively-operated hand machine tool, in particular a hammer drill or chisel, comprising a drive motor and a tool holder (10) for... |
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US20050045385 |
Down-the-hole drill hammer
The present invention relates to an arrangement pertaining to down-the-hole hammers in which a driver (7) is adapted to transfer torsion forces between a rotating outer tube (10) and a drill bit... |
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US20060096788 |
Reamer assembly
A reamer assembly for widening a drilled pilot hole or for widening a hole that has been widened in a first step in a down-the-hole drilling operation, includes a shank (14) for attachment of the... |
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US20170130532 |
Polycrystalline diamond percussion drill bits using low thrust and torque and incorporating PCD chisel type inserts, or combination of PCD chisel type inserts with PCD conical inserts, for application with small diameter drill bits
A polycrystalline diamond drill bit for percussion drilling, in small hole high silica ground. The bit is made having a bit body, and a series of inserts locating in the bit body, and the bits are... |