5 1/8 Inch 130mm DHD340 drill Bits with Guage 8*16mm Center 8*14mm
for hard rock
DTH bits face desigh and selection:
1. Rapid drilling speed, bit body wearless;
2. Advanced heat treatment process, ensure the drilling life longer
than similar products in the market.
3. DHD, MISSION, SD, QL, NUMA,different series of products, it can
meet needs of different working conditions.
Widely used in mines, quarries, earthworks and other engineering
drilling blasting hole, guardrail hole,mountain reinforcement,
anchorage and other engineering holes, geothermal exploration hole,
Well bore and other fields.
Qty.× Button Dia.(mm)
Face shape Features
1. Capable of drilling straighter holes in medium to hard rock
which is broken or less consolidated
2. Offers high penetration rate in the above stated rock conditions
3. Has excellent air flushing characteristics
4. Predominant face style for majority of drilling conditions
1. Have a superior performance in hard, abrasive and broken rock
2. They however have a slower penetration rate in comparison to a
concave face bit
1. This face has been designed to offer high penetration rate in
soft rock such as shale, limestone etc
2. They are recognized for having excellent capability for drilling
into moderately consolidated rock conditions
The appearance of the picture is different from that of the actual
product, and the actual product is the standard.