TH & DTH Drilling
Top Hammer & Down-The-Hole Applications
Our cemented carbide buttons are engineered for the demanding conditions of percussion drilling. Select the right grade below based on your rock formation and application requirements.
Grade Recommendations
Choose the grade that matches your drilling conditions. From cost-effective base grades to ultra-hard rock specialists.
HT0616T
Core Grade
The go-to grade for DTH and TH bits drilling medium-hard to hard rock. Excellent balance of wear resistance and toughness delivers consistent performance across a wide range of formations.
HT0616
Base Grade
Proven performance in taper bits and DTH face buttons. A cost-effective option for standard drilling conditions where premium toughness is not required.
HT0716T
Ultra-Hard Rock
Higher cobalt content (7%) delivers the extra toughness needed for hard rock where HT0616T experiences breakage. Ideal for abrasive quartzite, granite and gneiss formations.
HT0816
Brazed-In Carbide
Higher Co% (8%) provides excellent brazeability and thermal shock resistance. Designed for brazed-in carbide applications where the insert must withstand repeated heating and cooling cycles.
Button Shape Options
The right button shape maximises penetration rate and wear life for your specific rock type and drilling method.
Hemispherical
The most common button shape. Provides uniform wear pattern and good penetration in medium-hard rock. Widely used in TH and DTH face and gauge positions.
Parabolic
Aggressive cutting profile with higher penetration rate than hemispherical. Suited for softer formations where faster drilling speed is the priority.
Conical
Sharp pointed geometry for maximum penetration in soft to medium-soft rock. Often used in gauge positions for effective hole-wall cutting.
Explore All Carbide Grades
View detailed technical specifications, composition and property data for every Harttek grade.