The Ultimate Solution for Fracturable Rock and Earth

The Digga RC6 (Rock Combo) Auger is specifically engineered for drilling in demanding ground conditions that transition between heavy earth and fracturable rock. This 225mm auger provides a powerful, dual-purpose solution for operators who encounter shale, soft rocks, patchy ground, and permafrost. By combining the aggressive penetration of a rock bit with the efficient spoil removal of an earth auger, the RC6 ensures you don't have to swap attachments when the terrain gets tough.

Built to withstand the high-torque environments of the Australian construction industry, the RC6 series features a heavy-duty 75mm square drive hub and a reinforced centre tube. The 225mm diameter is a highly sought-after size, perfect for utility installations, structural fencing, and medium-duty post-hole tasks in difficult strata. With its robust construction and specialised taper-locked rock teeth, the RC6 delivers maximum performance and durability in ground that would stall a standard earth auger.

Compatible with Auger Torque S5 75mm Square Drive Hubs

Key Product Features

• Australian Made: Designed and manufactured locally to survive the harshest drilling environments on the planet.

• Rock Combo Cutting Head: Features a combination of tapered rock teeth and a heavy-duty pilot bit to shatter fracturable rock while maintaining high drilling speeds.

• 75mm Square Drive: Equipped with a heavy-duty hub designed to withstand the high torque output of 5000 to 8000Nm (PD5 to PD8HF).

• Tapered Tooth Design: The teeth are held securely in place by a taper-lock system, ensuring they remain seated even under extreme lateral pressure and vibration.

• True Cut Technology: Digga’s signature engineering ensures a precise 225mm hole diameter is maintained through the toughest layers of shale and rock.

• Optimised Flighting: Heavy-duty steel flights are pitched to clear large fragments and heavy spoil rapidly, reducing heat buildup and wear on the drive motor.

Specifications & Sizes

• Model: RC6 (Rock Combo)

• Suits: Auger Torque S5 Earth Drills

• Diameter: 225mm

• Overall Length: 1500mm

• Drive Hub: 75mm Square

• Flighting Thickness: Heavy-Duty Steel

• Teeth: Tapered Rock Teeth

Frequently Asked Questions

What ground conditions is the RC6 best suited for? The RC6 is designed for "combo" ground. It is most effective in heavy earth, shale, soft fracturable rock, and ground containing "floaters" or large stones. It bridges the gap between the A6 MFT (Multi-Faceted Tungsten) and the DR6 (Dedicated Rock) series.

Can I use the RC6 for solid, non-fracturable rock like Blue Metal? While the RC6 is significantly tougher than an earth auger, it is not intended for solid, non-fracturable rock like blue metal, granite, or reinforced concrete. For those specific applications, we recommend moving to the Digga DR6 Dedicated Rock series.

How do I maintain the teeth on an RC6? Tapered rock teeth should be checked regularly for rounding or chips. Because they are taper-locked, they can be easily replaced using a punch and hammer. Keeping sharp teeth on your auger is essential to prevent excess heat and stress on your drive unit.

Are the teeth and pilots replaceable? Yes. Both the tapered rock teeth and the heavy-duty rock pilot are fully replaceable. We recommend keeping spares on hand, especially when working in abrasive or rocky terrain, to minimise downtime.

Why Choose the RC6 Series?

The RC6 series is the professional's choice for unpredictable ground. Instead of struggling with an earth auger or risking damage to a dedicated rock tool in soft soil, the RC6 gives you the best of both worlds. This versatility minimises downtime and maximises your productivity on-site, providing a professional finish in the most challenging environments.

PROUDLY PRODUCED AND MANUFACTURED IN AUSTRALIA