Diamond Drill Bit

330mm large-diameter electroplated diamond core bit

The 330mm large-diameter electroplated diamond single-tube core drill bit is engineered for efficient core drilling in hard, competent rock formations. Diamond abrasives are electroplated onto the steel matrix with strong retention and uniform exposure, delivering fast penetration rates and stable core recovery in hard rock. It is widely used in geological drilling, mineral exploration, water well drilling, and engineering investigation projects.

Key Advantages

1. High penetration rate in hard rock
Optimized diamond grit size and concentration provide aggressive cutting action on the bit face, achieving excellent rate of penetration (ROP) and shortening hole completion time.

2. Strong electroplated bond
The electroplated layer bonds firmly to the steel body, holding diamonds securely under high rotary speed and weight-on-bit conditions for consistent cutting performance.

3. Single-tube core recovery design
The single-tube configuration simplifies the drill string and allows smooth core entry, delivering high core recovery with minimal disturbance in competent formations—ideal for geological logging and assay work.

4. Large 330mm diameter
Suitable for large-diameter water well drilling, geotechnical investigation, and mining exploration coring, compatible with standard drilling rigs.

5. Long service life, low cost per meter
Excellent wear resistance and extended run length reduce tripping frequency and lower overall drilling cost per meter.

Applications

  • Core drilling in hard, competent rock (granite, basalt, limestone, sandstone, etc.)

  • Geological and mineral exploration coring

  • Large-diameter water well drilling

  • Mining engineering exploration holes

  • Geotechnical investigation coring

Operating Recommendations

Match weight-on-bit and rotary speed to rock hardness, maintain adequate flushing fluid for cooling and face cleaning, and break in new bits at low speed before full-load operation to extend service life.