Digga North America 9in Dedicated Rock Auger

Description

High-tensile alloy steel tube forms the central spine of the Digga DR6-09-11 Dedicated Rock Auger. This 9-inch bit connects to 3-ton to 6-ton excavators for drilling solid bedrock and concrete. Rotating pick teeth fracture dense stone ahead of the spiral. The tool bogs down in soft mud because narrow rock teeth lack earth-shoveling surface area.

Machined from heavy-wall DOM seamless alloy tubing, this dedicated rock bit absorbs extreme shock from high-torque planetary drives. Hardox wear strips shield the flighting perimeter from severe abrasive erosion in granite. Engineered for excavator drive units producing up to 5,500 foot-pounds of torque, the bare tool weighs 98 lbs net. Dimensions measure 9 inches in diameter by 60 inches in length, finished in industrial yellow enamel.

Key Features of Digga DR6-09-11

Drilling contractors buy Digga DR6-09-11 tooling for setting boundary fence posts into solid limestone shelves. Specialized commercial auger pricing delivers rotating carbide bullet teeth that penetrate unweathered bedrock without fracturing the flighting structure.

• Nine-inch cutting diameter clears neat holes for steel line posts in bedrock
• Five-foot flight length penetrates deep rock formations without needing extension shafts
• Rotating carbide pick teeth fracture solid limestone, sandstone, and cured concrete
• Heavy Hardox flighting carries pulverized stone dust out of the borehole
• Chisel-point carbide pilot tip centers the bit on sloping rock shelves
• Two-inch round collar connection slides onto standard commercial excavator powerheads
• Cast alloy tooth holders protect pick retainers from severe lateral rock impact
• Short spiral pitch controls debris discharge to prevent downhole binding in stone

Torque Load Runout Realities

Field rotation checks on an 18-GPM excavator circuit show center tube runout below 0.010 inches total indicator reading over five feet. Flight deflection remains under 0.020 inches under 3,500 foot-pounds of sustained rock boring. Drilling solid limestone drops rotation speed from 58 RPM down to 32 RPM, with hydraulic circuit pressure stabilizing near 2,800 PSI. If the pick teeth jam on a quartz vein, hydraulic line pressure spikes to 3,200 PSI, requiring the operator to ease crowd force.

Field Usability Service Demands

A single worker can carry this 98-pound auger or guide it onto a motor hub. The round collar slides onto drive shafts without catching when kept clean. Rotating bullet teeth knock out in seconds using a standard pick removal punch. Do not purchase this dedicated rock cutter for wet loam, sand, or agricultural post holes where dirt teeth drill faster.

• Coat the round hub bore with chassis grease to avoid shaft seizure
• Inspect carbide pick teeth each shift to confirm free rotation in their holders
• Blow pulverized stone dust from tooth pockets before installing replacement picks

Factory Warranty Manifest Details

Digga backs this dedicated rock bit with a verified 1-Year manufacturer warranty on structural steel tubing and factory welds. The factory shipping crate contains the complete 9-inch rock auger, rotating carbide bullet teeth, a carbide pilot point, and technical documents. Powerheads require separate purchase.