Digging Post Holes

Highlights:

Post hole augers can be used for a variety of applications, such as running a fence, installing a new mailbox, and setting posts for a new deck.
Compared to manual tools, augers provide the easiest and fastest way to dig fence post holes.
Choosing the correct auger size ensures posts fit securely in the ground.
Knowing how to use a post hole auger correctly reduces physical strain and speeds up your projects.

Digging Post Holes with an Auger

If you’ve ever spent time digging post holes, then you know it can be a cumbersome, backbreaking job, especially if multiple holes need to be made. Luckily, an auger simplifies this job, and it’s a tool that you can put to a variety of other uses. In this guide, we’ll go over the different applications you can use a post hole auger for, how to dig post holes with an auger, choosing the correct auger for your project, and tips and tricks to make your project a success.

Using an Auger for Fence Posts, Decks, and Beyond

When you’re looking for the best way to dig post holes, an auger is the perfect tool for the job. While some models are designed to be used with larger power heads that require two people to control them, Power Planter’s post hole digging augers can be used with powered heads that have a 1-inch drill chuck. This means that you can operate the auger by yourself if you don’t have a friend to help you use a larger model.

Many projects become simplified with the use of an auger. Use it when digging for fence posts, a mailbox post hole, putting up a flagpole, or setting posts to install a new deck. Contractors specializing in outdoor amenities, such as fencing, pole barns, and decking, will find these tools particularly useful, since post hole digging is one of the first (and most labor-intensive) steps to these jobs. Investing in an auger provides an easy way to dig post holes, saving you time and back strain.

How to Use a Post Hole Auger

Save yourself hours of hard work by learning how to use a post hole auger. Digging doesn’t have to be backbreaking work, and fortunately, augers are designed to create uniform holes without straining yourself.

Steps for Digging Post Holes with an Auger:

Safety First: Call 811 to locate utility lines and have them marked to ensure you don’t hit anything important.
Make a Plan: Figure out your project layout and mark the areas where you will need to dig your holes.
Prepare Your Tools: You’ll need only an auger and a shovel to dig a pilot hole.
Position the Auger: Place the auger where you want the hole to go. It can be beneficial to remove the sod so the auger immediately starts drilling and does not get tangled or clogged with the sod.
Operate the Auger: Turn on the auger and allow it to drill into the ground. Make sure it drills to your desired depth.
Remove the Auger: Once you’ve reached the desired depth, turn off the auger and lift it out of the hole.

Using an auger to dig post holes simplifies and speeds up the process considerably. Unlike with traditional tools, there’s significantly less physical strain, as augers eliminate the need for bending and lifting. You also won’t have to manually deal with obstacles like rocks or hard soil. This makes it a highly efficient option, particularly for contractors who need to dig multiple holes in a short period of time, as it not only saves physical effort but also time and even labor costs for professionals.

Choose the Right Post Hole Auger Size

Whether you’re digging post holes for a fence, a mailbox, or a new deck, you need to choose the correct auger size for the job. Different post sizes will need different auger bits. Below is a guide on what size auger to use for 4x4 posts, 6x6 posts, and others.

T-Posts:

A 2-inch auger would suffice for these posts, allowing the post to easily fit, while the “T” grabs the sidewalls to have a strong hold

2 3/8-inch Posts:

A 7-inch or 8-inch auger would be appropriate.

4×4 Posts:

A 7-inch or 8-inch auger would be suitable. For wider holes, the auger can be maneuvered accordingly.

6×6 Posts:

A 9-inch auger can be used and moved around while drilling to create a wider hole, ideally 10-12 inches in diameter.

Tips & Tricks for Post Hole Digging with an Auger

Work in Stages: When digging post holes in tough soil, drill a few inches at a time instead of forcing the auger straight down. This keeps your holes straighter and reduces strain on the tool.
Dealing with Roots & Rocks: If you hit tree roots or buried rocks, stop the auger and clear the obstruction with a shovel. Then resume drilling to finish the hole.
Watch the Weather: Soil conditions affect how well posts will set. After heavy rain, holes may collapse or become too soft, while frozen winter ground is far more difficult to dig. Aim to drill when the soil is firm but workable.
Moisten Dry Ground: If the soil is extremely dry and compact, lightly water the area before you dig. This makes drilling smoother and helps the auger cut through more evenly.

Keep the Auger Clean: After each use, remove soil from the blade and shaft. A quick rinse with water and a light coat of oil on the metal will prevent rust and extend tool life.