Drop centre retrac bits for T45 drill strings. A drop centre drills straighter holes in medium to hard rock. Retrac skirts help in broken ground, keep holes straighter and make the bit easier to retrieve. Diameters from 3 in (76 mm) to 4-1/2 in (115 mm). Hemispherical or ballistic carbide.
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Thread
T45
Diameter
3 in (76 mm)
Face
Drop centre, retrac
Carbide
Hemispherical
Button layout
gauge 6 × 7/16 in, mid 3 × 7/16 in, centre 2 × 5/16 in
Flushing holes
3 × 3/8 in front
Weight
6.6 lb (6.61 lb)
Shipping estimate
Used with
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