Robit’s H Series hammers, introduced to provide modularity and efficiency in demanding drilling environments, now have a new high-performance variant: the H Marathon Series.

Developed under the Robit R&D team, the Marathon is designed to significantly improve wear life and reduce operating costs in Down the Hole drilling.

The core innovation of the Marathon line focuses on strengthening the hammer’s most wear-prone components – the drive chuck and wear sleeve – using advanced materials and coating technologies. The result is a hammer that can be used for a longer period before reaching its wear limit.

Tests show the Marathon hammers outperform both standard H Series hammers and competitor tools in terms of wear life. Depending on application and conditions, improvements ranged from +15% to +67%.

Tested in real-world conditions
Field validation was an essential part of the development process. In South Africa, Brauteseth Blasting tested the H6 Marathon at the Phalaborwa phosphate mine. The hammer completed its whole lifespan with a single chuck, whereas a standard model would typically need two. Wear was distributed more evenly, resulting in reduced downtime for maintenance and replacement.

In Finland, further testing focused on well drilling in hard granite using 4” H4 hammers. The Marathon hammers drilled beyond 300 meters and showed 33–35% longer wear life than standard versions. The tests confirmed a more consistent wear pattern and improved durability, especially when used with specific top subs and bit configurations. PTA (Plasma Transferred Arc) coated chucks also helped reduce casing wear – a common failure point in conventional designs.

The H Marathon Series hammers will be rolling out in various configurations throughout 2025. With their extended wear life and proven field performance, they are reinforcing Robit’s commitment to continuous innovation and practical durability in DTH drilling.