How to Use an Auger | Drill Clean Holes, Clear Clogs

Using an auger correctly depends on the type: powered earth augers bore fence and planting holes, while manual drain augers clear plumbing clogs.

Augers look like giant screws, and they serve two very different jobs depending on which kind you pick up. A powered earth auger drills post holes for fences or decks, while a manual drain snake clears clogs from pipes and toilets. The technique for each is distinct, and getting it right means safer digging and faster plumbing fixes.

How To Use An Earth Auger For Post Holes

An earth auger works best when you let the bit cut instead of forcing it into the ground. Before you start the engine, walk the hole locations and confirm where you need to dig.

Call 811 at least two days ahead so utility lines get marked. Then clear rocks, roots, and debris from the surface. Position the auger upright over your mark, start the engine per the manufacturer’s instructions, and engage the bit gently with the throttle. Apply steady downward pressure while letting the machine’s weight do the work.

Lift the auger periodically to clear packed soil from the hole. If you hit a rock or root, stop, release the throttle, and pull it out by hand rather than forcing the bit through. A stalled bit that keeps spinning can torque violently, so keep your hands and feet clear.

Hole depth often needs to sit below the frost line, and the hole diameter should run about three times the width of the post. Wear safety glasses, hearing protection, gloves, and steel-toe boots.

One-Man vs Two-Man Augers: Handling The Torque

Powered augers come in one-man and two-man models, and the main difference is how you manage kickback.

With a one-man auger, brace your left side against the machine to counter the torque. Start per the manufacturer’s guide, drill in short increments, and lift or reverse periodically to clear spoil. Stop immediately if the bit binds.

A two-man auger spreads the load. One operator stabilizes the machine while the other starts it. Both operators have kill switches, so keep them within reach. Engage the throttle only as needed and shut down right away if anything feels wrong.

For either type, the secrets are the same: let the bit cut, clear the hole often, and never fight the machine when it stalls.

How To Use A Drain Auger Or Toilet Auger

Drain and toilet augers feed a flexible cable into a clog, then crank to break it up or snag it. The technique is gentler than it looks.

Insert the cable into the drain or toilet opening and turn the handle clockwise while pushing gently. When you feel resistance, keep rotating to work through the clog. Withdraw the cable carefully, then flush to confirm the line is clear. Repeat if water still drains slowly.

For a toilet auger, keep the protective boot in the bowl water the entire time to avoid scratching the porcelain. Crank slowly, and if the cable won’t feed, reverse direction briefly before trying again. Never force it — too much pressure makes the cable double back or jam. Flush several times after clearing to make sure the clog is gone for good.

Common mistakes on any auger boil down to forcing the tool. Pushing an earth auger into the ground strains the engine, and cranking a drain auger too hard risks jamming the cable. Lift to clear, reverse when stuck, and let the tool’s design do the cutting.

Safety Rules That Apply To Every Auger

Every auger type shares the same safety foundation: confirm what’s below, protect yourself, and stop when something binds.

Calling 811 before any outdoor digging is the single most important step — it gets underground utilities marked for free. On the ground, wear safety glasses, hearing protection, gloves, and steel-toe boots. If a powered auger hits an obstruction, release the throttle immediately and remove the obstruction before continuing. Never leave a running auger unattended, and keep your hands away from the bit at all times.

Understanding the tool itself helps too. A traditional hand auger has six parts — screw, spurs, cutting edges, twist, shank, and tang — and knowing how the screw pulls the bit into the material explains why steady pressure beats brute force. For a soil auger like the stainless steel 4-inch model, the narrow bit works well for testing soil, while wider bits clear room for posts. For a complete breakdown of the best options for planting trees, see our roundup of top-rated augers for tree planting.

Once the hole is dug or the clog is clear, maintenance is simple: clean the bit or cable, dry it, and store it out of the weather. That keeps the auger ready for the next job.