Extending Tool Life in Extreme Rock Drilling Conditions with Endura‑Line®
Endura‑Line significantly extended tool life and reduced maintenance on a demanding Frankfurt rock‑drilling project, outperforming traditional hard‑faced tooling in one of the toughest conditions on site.
In early 2026, Aarsleff supplied a set of Endura‑Line fitted
augers to a piling project in Frankfurt, Germany, where the
contractor was experiencing severe wear on their traditional
drilling tools. The ground conditions consisted of extremely
abrasive rock, and each 11‑metre pile required around six
hours of continuous drilling. As a result, the site was seeing
exceptionally high levels of tool degradation. The existing
stingers were wearing out at a rate of one per day, and the
augers themselves needed to be hard‑faced daily to keep
them operational. This cycle of wear and repair was not only
costly but caused unwelcome delays to the programme.
The Endura‑Line equipped augers were delivered to Frankfurt
on 30 January 2026. Soon after arrival, early use produced a
revealing comparison. A photograph taken after only two
drilling cycles showed clear wear on the stinger at the base of
the auger, while the Endura‑Line protection blocks displayed
no visible deterioration at all. This contrast highlighted the
resilience of the Endura‑Line system in conditions where
conventional hard‑facing was failing almost immediately.
As drilling continued, the benefits became even more
apparent. Since their arrival on site, the Endura‑Line tools
have remained in continuous use without requiring any
replacement of the Endura blocks and without the need for
additional hard‑facing. Routine replacement of stingers and
teeth has continued as expected, but the protected sections
of the auger have remained intact. This performance has
offered a significant improvement over the previous setup,
reducing both downtime and maintenance effort and
allowing the team to progress more efficiently through the
challenging geology.
Encouraged by these results, Aarsleff is now supplying
additional tooling fitted with Endura‑Line blocks on the
stingers themselves, aiming to reduce wear in the areas that
continue to experience the heaviest abrasion. This
development marks the next step in enhancing tool
longevity across the full drilling assembly.
The Frankfurt project demonstrates the practical value of
Endura‑Line in high‑wear applications. In a setting where
traditional tools were lasting only a day before needing rehard
facing, the Endura‑Line system has delivered sustained
durability, reduced maintenance requirements and
improved overall productivity. With further enhancements
now being introduced, the site continues to benefit from a
more reliable and cost‑effective tooling solution suited to
the demands of rock drilling.
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