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Brunner & Lay T51 button bit, drop centre, 6 gauge + 3 mid + 2 centre buttons, 3 front flushing holes (render)
  • Brunner & Lay T51 button bit, drop centre, 6 gauge + 3 mid + 2 centre buttons, 3 front flushing holes (render)
  • Brunner & Lay T51 button bit, drop centre, 6 gauge + 3 mid + 2 centre buttons, 3 front flushing holes (render)

3D render from OEM drawings, not a photograph.
Brunner & Lay T51 Drop Centre Bits

Brunner & Lay · Top hammer bits

Brunner & Lay T51 Drop Centre Bits

Part no.
S3551D0

Drop centre bits for T51 drill strings. A drop centre drills straighter holes in medium to hard rock. Diameters from 3-1/2 in (89 mm) to 5-1/2 in (140 mm). Hemispherical carbide.
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Dimension drawing: Brunner & Lay T51 Drop Centre Bits Thread T51 (female). Diameter 3-1/2 in (89 mm). Ø 3-1/2 in (89 mm) T51
ThreadT51
Diameter3-1/2 in (89 mm)
FaceDrop centre
CarbideHemispherical
Button layoutgauge 6 × 9/16 in, mid 3 × 1/2 in, centre 2 × 3/8 in
Flushing holes3 × 1/2 in front
Weight8.4 lb (8.38 lb)

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