PDC drill bits are suitable for soft to medium hard rock formations below grade 7, and are manufactured using two manufacturing processes: matrix type and rigid body type.
Matrix PDC-TT drill bit
Tungsten carbide-based wear-resistant Matrix--long service life
Rigid PDC--NA drill bit
Alloy steel substrate--Diversified structure

Rigid PDC-NA drill bit
Centerless drilling in medium-soft formations--good guidance

Rigid PDC-GD drill bit
Centerless drilling in medium-soft formations--high efficiency