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Underground hard rock drills

As you look to address the challenges posed by tough hard rock mining environments productively and efficiently, we offer a full line of capable and versatile jumbo drills that are built on a common platform for increased user adoption and efficient training.

underground, hard rock, drill, Komatsu, ZB21
Jumbo drills


Designed for flexibility and productivity, the ZJ21 is a jumbo drill on a first-ever common-carrier platform. The controls and boom let you convert your jumbo to a bolter, or vice versa. The ZJ21 also offers excellent useable coverage in a small jumbo platform.

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Komatsu's drilling and bolting solutions

Drilling and bolting for versatile, productive solutions for the ZB21, ZJ21 and ZJ32Bi machines.

Underground hard rock mining industry

Stay on top of trends with help from our experts, customer success stories and industry point-of-view—so you feel equipped to successfully maintain and optimize your operation.
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Find what works for you