TR8 Tapered Rock Auger - Digga

Unstoppable Penetration: The Master of Non-Fracturable Rock

The Digga TR8 Tapered Rock Auger is the ultimate heavy-duty attachment for operators facing the most unforgiving sub-strata. Engineered specifically for high-torque machines, this auger is designed to conquer solid, non-fracturable rock, including high-grade concrete, granite, and basalt. Unlike standard augers that may bounce or stall, the TR8 features a distinctive tapered design that focuses maximum downward pressure onto a concentrated cutting path, allowing the high-grade rotating rock picks to "eat" through solid stone with surgical precision.

Manufactured in Australia to withstand the absolute extremes of the construction and mining industries, the TR8 is built around a massive reinforced centre tube and a heavy-duty 75mm square drive hub. The tapered flighting is a masterstroke of engineering; it minimises friction while ensuring that crushed rock spoil is efficiently lifted away from the cutting face. When your project demands a hole in ground that most would consider "undrillable", the TR8 Tapered Rock Auger provides the mechanical advantage required to maintain your schedule and protect your drive unit from unnecessary stress.

Compatible with Auger Torque S5 75mm Square Drive Hubs

Key Product Features

• Rotating Rock Picks: Equipped with heavy-duty, rotating tungsten carbide rock picks that self-sharpen during operation for consistent cutting performance.

• Tapered Engineering: The specialised tapered flighting reduces peripheral drag and focuses the machine’s crowd pressure directly onto the rock face.

• 75mm Square Drive: Features a reinforced hub specifically designed to handle the extreme torque outputs (5,000Nm to 12,000Nm) of 5t to 10t excavators and high-flow skid steers.

• Superior Spoil Removal: Despite its aggressive rock-cutting focus, the flighting pitch is optimised to clear heavy debris and prevent "plugging" in the hole.

• Extreme Durability: Constructed from high-tensile steel with heavy-duty wear strips to ensure a long service life in highly abrasive environments.

• Precision Pilot Bit: Features a robust rock pilot that provides a stable anchor point, preventing the auger from "walking" on solid stone surfaces.

Specifications & Sizes

• Model: TR8 (Tapered Rock)

• Suits: 5t – 10t Excavators / High-Flow Skid Steers

• Drive Hub: 75mm Square

• Overall Length: 1500mm

• Cutting Teeth: Rotating Tungsten Carbide Picks

• Flighting: Tapered Heavy-Duty Steel

Frequently Asked Questions

What ground conditions is the TR8 specifically designed for? The TR8 is a dedicated rock tool. It is designed for solid, non-fracturable rock such as sandstone, limestone, granite, and reinforced concrete. If you are drilling in earth or shale, the RC8 or A8 series may be more efficient, but for solid stone, the TR8 is essential.

Why is the auger tapered instead of straight? The taper allows the auger to start a smaller "pilot" path which is then gradually widened. This concentrated force requires less torque to break the rock's surface compared to a flat-bottomed auger, significantly increasing your drilling speed in hard materials.

How do the rotating picks work? The teeth are designed to rotate in their holders as they strike the rock. This rotation ensures even wear across the tungsten tip, effectively "self-sharpening" the tool and preventing flat spots that would otherwise reduce cutting efficiency.

Can I replace the teeth on-site? Yes. The rock picks are held in by heavy-duty circlips or retainers and can be changed quickly in the field with a Rotating Rock Pick Removal Tool (C123), also available from Earthmoving Warehouse. Regularly checking and replacing worn picks is the best way to minimise downtime and protect the auger body.

Why Choose the TR8 Series?

When the ground turns to solid stone, the TR8 is the only tool that ensures you keep moving forward. It transforms your excavator into a high-production drilling rig, delivering the precision and power needed for foundation piers, bridge abutments, and heavy infrastructure projects. By choosing the TR8, you are investing in an Australian-built powerhouse that prioritises durability and performance, ensuring that no ground is ever truly off-limits.

PROUDLY PRODUCED AND MANUFACTURED IN AUSTRALIA

Please note that Tapered Hard Rock Augers are custom made to order. Build times are required. Usually 14 to 30 days from full payment.

See more about Tapered Rock Augers here https://www.earthmovingwarehouse.com.au/collections/tapered-rock-augers

Core Barrels are also available. See more details here https://www.earthmovingwarehouse.com.au/collections/core-barrels