Drop centre bits for T45 drill strings. A drop centre drills straighter holes in medium to hard rock. Diameters from 2-3/4 in (70 mm) to 4-1/2 in (115 mm). Hemispherical or semi-ballistic carbide.
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Thread
T45
Diameter
2-3/4 in (70 mm)
Face
Drop centre
Carbide
Hemispherical
Button layout
gauge 6 × 7/16 in, front 3 × 7/16 in
OEM catalogue number
A44591
Shipping estimate
Used with
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