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Bits for drilling in stone specially developed by our original gun drill processing.
Dust is removed smoothly from the hollow shaft by air blowing and therefore drilling efficiency is improved.
Rock, stone etc.
ø13mm to 19mm (ø33/64" to 3/4")
250mm or 350mm (9-27/32" or 13-25/32")
Max. drilling depth:
130mm to 230mm (5-1/8" to 9-1/16")
Applicable electric drill:
Air hammer drills
The actual sizes are in metric, and imperial sizes are approximate.
The bit size (diameter) is based on MIYANAGA standard.
Bit size D
Overall length L
Max. drilling depth l
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