Top Hammer drilling uses striker bar or shank adapters to rotate the steel as well as to “hammer” into rock via hydraulic percussion from above. Used in road building, pipeline construction and tunneling or where rock removal is necessary. Is also used in combination with hollow anchor bars for support.
Pinnacle supplies a wide variety of Top Hammers, Bits and Drill Steel and their accessories. We source uncommon sizes, threads and lengths to suit your drilling needs.Read More
Drill Steel come in three popular threads: T-38, T-45, T-51 but larger sizes are also available. Extension rods M/M which require a coupler or Speed rods which are M/F for threading are available.
BIT STYLES & SIZES
Relative to Drill Steel and the application, but are typically sized from 2.5” and 6”.
Convex – used for softer formation – an aggressive bit for fast penetration
Drop Center (Concave) – medium to hard formation when penetration and flushing is important
Flat Face – used for harder rock
Additionally, Venturi flushing holes can be added to expedite cuttings removal.