Boart Longyear 

Bit Inserts

Boart Longyear™ offers five unique button inserts to match client's needs.  Dependent upon drilling method and formation being encountered specific inserts can be selected to obtain maximum results.  

Hemispherical ButtonBallistic ButtonScraping ButtonTwo Step Button
    
Scalping Button   
    

Hemispherical Button


Hemispherical Button


- Applicable for hard rock
- Best suited for rotary-percussive drilling
- Low abrasion
- 25 000 to 45 000 PSI (170 a 300 MPa)

    
Rotation Lock Bit


Ballistic Button


- Applicable for medium hard rock (mudstone, marl, sandstone), as well as loose rock
- Best suited for rotary-percussive drilling
- 10,000 to 20,000 PSI (70 to 140 MPa)

    
Scraping Button


Scraping Button

- Applicable for loose rock as well as soft geological formations (mudstone, marl)
- Best suited for rotary drilling with temporary percussion

    
Rotation Lock Bit with Flushing Holes


Two Step Button

- Applicable for medium hard rock (mudstone, marl, sandstone), as well as loose rock
- Best suited for rotary-percussive drilling

    
Flat Collar Drive Shoes


Scalping Button

- Applicable for concrete, conditional, loose rock and soft geological formations
- Best suited for rotary drilling