Auger Drive Units
Precision Drilling Power for Heavy-Duty Excavators
Welcome to our curated collection of Auger Drive Units—the professional-grade hydraulic powerheads designed to transform your excavator into a high-efficiency drilling machine. This category is for contractors, utility crews, foundation specialists, and land clearing professionals who demand consistent torque, reliable single or two-speed operation, and the durability to handle tough soil conditions, frost, and rock. Whether you are installing fence posts, solar foundations, or deep structural piers, these units deliver the controlled force and rugged build quality your jobsite requires.
What to Look For
Selecting the right Auger Drive Unit starts with matching your excavator’s hydraulic flow and pressure. Check your machine’s rated flow (GPM) and operating pressure (PSI) to ensure compatibility—single-speed units like the Digga SD Series offer simplicity and high torque at lower flows, while two-speed models (e.g., Digga DDT Series) provide faster rotation in soft ground and increased torque in dense material. Consider shaft size (commonly 2.5″ or 3″ hex) and auger diameter requirements. For demanding applications, look for high-flow models with planetary gear reduction, heavy-duty bearings, and integrated relief valves to protect against shock loads. A drive unit with a replaceable wear plate and accessible service points will reduce downtime over the long haul.
Our Auger Drive Units Collection
Our selection features 39 premium Auger Drive Units from Digga, a global leader in earth drilling technology, priced from $11,800 to $27,100. Every unit in this range is engineered for excavators from mini to mid-size, with robust cast housings, sealed motor designs, and optimized gear trains. The Digga SD Series (SD45HPS, SD50HPS, SD70HPS, SD80HPS, SD95HPS) delivers high-powered single-speed performance for consistent, heavy drilling. The Digga DDT Series (13DDT, 16DDT, 20DDT, 25DDT, 30DDT) offers versatile two-speed operation with 3″ hex shafts, ideal for operators who need both speed and brute force on the same job. Each unit is backed by factory support and ready to ship.
Browse our complete inventory to find the perfect match for your excavator and application. If you need assistance selecting the right drive, contact our team—we’re here to help you drill with confidence.
Showing 1–12 of 13 results
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Auger Drive Units, Blue Diamond Skid Steer Attachments, Mini Skid Steer Attachments, Mini Skid Steer Attachments, Skid Steer Attachments
Price range: $3,120.00 through $4,288.00 Select options This product has multiple variants. The options may be chosen on the product page -
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Auger Drive Units, Skid Steer Attachments
$4,160.00 Select options This product has multiple variants. The options may be chosen on the product page
Showing 1–12 of 13 results
Every drive in this catalog uses a planetary gearbox with universal quick-attach mounting — bolt on in under 20 minutes on any Bobcat, CAT, John Deere, Kubota, New Holland, or Case skid steer.
Matching your drive to your machine’s hydraulic flow is the most critical spec decision. Standard-flow auger drives (8–23 GPM) handle general-purpose drilling in soil, clay, and soft rock. High-flow auger drives (23–45 GPM) power larger diameters through dense clay, caliche, or rocky subsoil without cavitating the motor. A Bobcat T770 at 22 GPM standard flow and a CAT 299D3 XHP at 40 GPM high flow need different drives — running the wrong match voids warranties and burns motors.
Planetary Gearbox vs. Orbital Motor: Which Do You Need?
Planetary gearbox drives produce high torque at low RPM — ideal for 2-stage and 3-stage drilling in hard material and large-diameter bits (12″–48″). Orbital motor units run lighter and faster, suited for fence post work (6″–12″ bits) in consistent soil. Both use ORFS hydraulic fittings and return-line case drain connections on high-torque models.
Frequently Asked Questions
What GPM auger drive do I need for my skid steer?
Check your machine’s auxiliary hydraulic specs in the operator manual. Standard-flow machines (Kubota SVL75-2, Bobcat S76, John Deere 317G) run 14–22 GPM. High-flow machines (Bobcat T870, CAT 299D3, New Holland L340) run 28–45 GPM. Contact us with your exact model and we confirm the correct drive before shipping.
Can I use auger bits from other brands on these drives?
Yes — all units use the industry-standard 2-9/16″ hex or round output shaft compatible with Danuser, McMillen, Pengo, Little Beaver, and most third-party bits. Haugen Tach-All bits require a matched Haugen drive.
Do I need a case drain line?
High-torque planetary drives (above 2,000 in-lbs continuous) require a case drain return line to tank to prevent motor seal blowout under back-pressure. Check your skid steer’s return port before ordering. Our team confirms case drain requirements for every order.
Pair your drive with the right bit from our Auger Bits catalog or add reach with our Extension Shafts. For deep foundation work, see our Helical Pile Drivers. All orders over $1,500 ship freight-free to the lower 48 states.
