12 Degree Tungsten Carbide Hexagonal Shank Tapered Drill Rod Diameter 25mm Taper Steel Rod

Different rock formations and rock drills require different taper angles. When drilling with high impact hydraulic rock drills in medium-hard to hard and abrasive rock formations, a wide taper angle is normally used. Taper angles of 11 and 12 degrees are normally used on modern drill rigs. For low impact rock drills and softer rock formations, a narrow taper angle of seven degrees is used. A 7 degree angle can also be used if bit spinning is a problem when using 11 and 12 degree equipment. In addition, a 4, 46 degree angle is ideal for soft rock when you're using pneumatic or hydraulic drill rigs - to prevent bits from spinning or becoming detached.

Taper Drill Rod is used for rock drilling, blasting holes and other drilling situations, including quarries, coal mines, traffic and other construction.
Normal diameter or rod is 22mm, named H22, KSQ can also make H19 and H25.
For drilling medium-hard to hard and abrasive rock formations,Taper angles of 11 and 12 degrees are used by a hand held drill machine like YT28B, YT29A, Y24, YT24, Mobile rock drill pneumatic and hydraulic in underground mining and for small hole drilling, equipped with small power rock drills, like air leg rock drills, hand held rock drills, etc.

Product Advantage:

Taper Drill Steel is mainly used in small-hole drilling, such as stone quarrying, foundation drilling, tunneling, underground mining, road cutting, and trenching and so on, It can reduces the expense of impact energy, improves the drilling speed and efficiency, which can be used for drilling bore hole diameter from 23mm to 45mm usually.

Hexagonal Shank 25*108mm Taper Drill Steels

Specification of Other Integral Drill Steels: