Drop centre Xtrac bits for XT51 drill strings. A drop centre drills straighter holes in medium to hard rock. Xtrac bodies are tapered retrac bodies with flat spline grooves. Diameters from 3-1/2 in (89 mm) to 5-1/2 in (140 mm). Hemispherical, semi-ballistic or conical carbide.
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Thread
XT51
Diameter
3-1/2 in (89 mm)
Face
Drop centre, Xtrac
Carbide
Hemispherical
Button layout
gauge 8 × 7/16 in, front 4 × 7/16 in
OEM catalogue number
A16111
Shipping estimate
Used with
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