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    Kevitsa rock and Robit DTH hammers: wear behaviour and design notes for drill engineers

    January 5, 2026|

    Reviewed by Joe Ashwell

    Kevitsa rock and Robit DTH hammers: wear behaviour and design notes for drill engineers

    First reported on International Mining – News

    30 Second Briefing

    Kevitsa’s nickel-copper open pit in Finnish Lapland is subjecting Robit down-the-hole (DTH) hammers to extremely abrasive, high-strength host rock, pushing bit wear and hammer fatigue close to design limits. Robit has been trialling heavy-duty DTH configurations with modified carbide button profiles and optimised air pressure settings to maintain penetration rates and hole straightness for production drilling. The work is feeding into revised hammer life predictions and bit selection guidelines for hard, abrasive sulphide orebodies with similar geomechanical conditions.

    Technical Brief

    • Kevitsa open pit lies ~30 km north of Sodankylä in Finnish Lapland, within Archaean basement.

    Our Take

    Kevitsa’s hard nickel–copper ore sits within a small subset of our 474 Mining stories where tool performance, rather than orebody scale or economics, is the primary constraint on productivity, signalling that bit and hammer selection can be a genuine bottleneck in Scandinavian hard-rock operations.

    Among the 131 nickel- and copper-tagged pieces in our database, Finnish Lapland appears less frequently than jurisdictions like Western Australia or Chile, so performance data from Kevitsa gives drill and blast teams a relatively rare benchmark for Arctic, low-temperature hard-rock conditions.

    Because this item is tagged as Projects, Product and Research, it falls into a niche group of 910 tag-matched pieces where OEMs like Robit are testing equipment directly in operating mines, which operators often use to de-risk future fleet procurement or standardise tooling across multiple nickel and copper sites.

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    Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.

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