Applications:

1.Applicable for strong rock up to 100MPa or rock with deep cracks.

2.Applicable for lightly reinforced concrete.

3.It can be used for drilling backfill layer, medium weathered rock, bedrock strata, large boulders and hard permafrost.

4.Core barrel with bullet bits is used for cutting an annular ring in rock or concrete.

Features:

1.Cutting ring with staggered arrangement of round shank chisels

2.Chisel holders are welded to the base body. The round shank chisels can be easily replaced

3.Kelly box: 130mm,150mm,200mm(optional)

4.Barrel adopts spiral wear-resistant strips for anti-attrition to prolong the service life

5.Many alloy teeth are used for higher drilling efficiency

6.Heightened design with high construction efficiency, reducing construction cost