Drop centre bits for T45 drill strings. A drop centre drills straighter holes in medium to hard rock. Diameters from 3 in (76 mm) to 4-1/2 in (115 mm). Hemispherical carbide.
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Thread
T45
Diameter
3 in (76 mm)
Face
Drop centre
Carbide
Hemispherical
Button layout
gauge 6 × 7/16 in, mid 3 × 7/16 in, centre 1 × 7/16 in
Flushing holes
3 × 3/8 in front
Weight
5.1 lb (5.07 lb)
Shipping estimate
Used with
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