The carbide buttons are the parts of a DTH drill bit that directly contact and break the rock.
Two commonly discussed button geometries are spherical and ballistic types.
Spherical buttons have a rounded cutting surface.
Their shape provides a large contact area and good resistance to impact damage.
They are often considered for:
Ballistic buttons have a more pointed profile.
The smaller initial contact area can provide a more aggressive rock-breaking action in suitable formations.
They may be considered for:
The wrong button geometry may contribute to:
However, button shape should never be selected independently.
Also consider:
Gauge buttons help maintain borehole diameter, while front buttons perform much of the primary rock-breaking work.
Different button layouts can be selected according to drilling conditions.
YKDRILL supplies DTH button bits with different carbide layouts and bit designs for water wells, mining, quarrying, and other hard-rock drilling applications.
Providing rock samples or formation descriptions can help improve product selection.
