Hollow Hex Drilling Rods equipment affords drillers the ability to change drilling bits whilst still using the same drilling rod. Different taper sizes have different characteristics when it comes to the “knock-off” index – the smaller angle will prevent the bit from spinning.• Suitable for small hole range
• Widely used in Dimensional Stone Quarrying Industry
• Widely used in Underground Mining Industry
PANDADRILL can make all length according to your request!
Normal Rod + Normal Tungsten Carbide
Used on low power Rock Drll，in soft rock, mine.
8Cr or 95CrMo Steel
Used on higher power Rock Drills ( Bigger than Y24), in middlle and hard rock.