Tapered TR4 Rock Auger - Digga

The Specialist Solution for Heavy Rock Penetration

The Digga TR (Tapered Rock) Auger is a premium drilling tool engineered for maximum penetration in solid rock and high-PSI ground conditions. Featuring a unique tapered design, this auger is built to reduce friction and improve the efficiency of the cutting head in the most challenging sub-surface environments. Equipped with heavy-duty tungsten rotating rock picks, it provides the concentrated ripping power required to penetrate solid rock, including bluestone, basalt, sandstone, mudstone, and concrete.

The tapered flighting design is the key to the TR4’s success, allowing for aggressive cutting while ensuring the auger can be easily extracted from deep bores in heavy material. Built with reinforced 8mm thick flights and a high-grade steel centre tube, this model is designed to deliver high penetration rates in non-fracturable materials where standard augers fail. The TR4 ensures that maximum downward pressure is focused directly on the tungsten carbide tips, allowing for a precise grinding action that clears a clean path through the toughest terrain.

Key Product Features

• Australian Made: Designed and manufactured locally to withstand the extreme demands of drilling into solid Australian rock and concrete.

• Tapered Design: Engineered to reduce drag and friction, allowing for smoother drilling and easier extraction in dense rock.

• Rotating Rock Pick Pilot: Features a heavy-duty pilot specifically designed to lead the auger into hard surfaces, ensuring stability and preventing wandering.

• Rotating Rock Pick Teeth: Equipped with high-grade tungsten carbide rotating rock picks that provide a continuous grinding action for solid rock.

• Versatile Drive Hubs: Available in 65mm Round, 50.8mm Hex, and 57mm Square drive sizes to suit your specific drive unit.

• True Cut Technology: Guaranteed to deliver the specified hole diameter throughout the entire depth of the bore.

• Heavy-Duty Construction: Built with a reinforced centre shaft and thick steel flights to handle the extreme torque required for rock drilling.

• Compatible with Auger Torque S4 Drives: TR4 65mm Round Drive Augers will fit Auger Torque S4 Drives.

Frequently Asked Questions

When should I choose the TR4 over the DR4 series? The TR4 is specifically chosen when additional clearance or reduced friction is required in heavy rock drilling. The tapered design is particularly effective in preventing the auger from getting "stuck" in certain types of solid rock formations, providing a more efficient drilling cycle.

What kind of machine do I need to run a TR4? The TR4 is compatible with mini excavators, skid steers, and mini loaders. For rock drilling, ensure your machine has sufficient down-pressure and hydraulic torque to allow the rock picks to effectively grind the material.

Which drive hub do I need for my machine? This depends on your specific drive unit. We offer the TR4 range in 65mm Round, 50.8mm Hex, and 57mm Square hubs. Always check the output shaft of your drive motor before ordering to ensure a perfect fit.

Are the rock teeth replaceable? Yes. The tungsten rock picks are designed to be easily replaced once worn. Maintaining sharp, functional teeth is essential for high penetration rates and the protection of the auger body.

Suitable for all 65mm round drive, 50.8mm Hex Drive & 57mm Square Drive

• Teeth and Pilot: Rotating Tungsten Rock Teeth

• Design: Tapered Flighting

• Length: 1200mm

• Drive Hub: 65mm

Available Hub Options:

• 65mm Round Drive

• 50.8mm Hex Drive

• 57mm Square Drive

Choose from the DRIVE HUB TYPE drop down menu options.

PROUDLY PRODUCED AND MANUFACTURED IN AUSTRALIA Please note that 50.8mm Hex and 57mm Square drive augers may be made to order. Build times may occur.