Used Auger For Sale - Craigslist (2024)

FAQs

What size auger is best for post hole digger? ›

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.

Among its world-class features are a balanced, pivoting engine cradle for ease of use and proper tongue weight distribution when towing, a wide range of augers from 2″ to 18″ in diameter with variety teeth, adapters, and extensions to 66″ deep.

For health reasons alone, augers are a worthwhile investment. However, for people who have a lot of digging to do, an earth auger becomes a time-saving necessity.

Additionally, the diameter of your post hole should be three times the diameter of your post. So, if you're planning on using a four-inch round or 4x4-inch square post, your post hole will need to be 12 inches in diameter.

Therefore, the 4x4 post will likely fit into a hole drilled by a 6" diameter auger. However, this leaves less than 1/2" at the widest part for cement or dirt to be packed in to secure the post. For this reason, an 8"-10" auger would work much better and provide the necessary fill space for cement or tamping.

Choose an auger based on the number, size and depth of the holes you need. Your soil type might also be a factor. If it's rocky you'll need a more powerful auger and a larger bit.

If you're wondering how deep can a post-hole digger dig, the answer depends on the application and the tool. Most augers dig about 3 feet deep, but an extension rod can be used to gain another 12 inches of depth.

Why won't my auger go down into the ground? There are many variables, but the most common is that the ground is hard, and requires extra weight. The optional down pressure kit will help in this condition.

The principal disadvantage of sampling by auger methods is that samples are highly disturbed and soils from different strata can be mixed. Because of the potential for mixing soils from different strata, stratigraphic logging using cuttings from auger borings is extremely difficult.

Some powered earth augers can drill deeper, to depths of 20 feet or more. It is worth noting that specialized industrial augers exist for specific applications. These heavy-duty earth augers can dig holes up to 95 feet deep for large construction, mining or geotechnical engineering needs.

What size auger is best? ›

Auger drill sizes

The size of the drill bit determines the diameter of the hole. 2- to 3-inch bits: Useful for planting bulbs or installing small poles. 6-inch bit: Often used to dig holes for small plants and steel fence posts. 8- to 10-inch bit: Can be used to dig holes for larger plants or 4 x 4 wooden fence posts.

Maximum Depth:

Solid flight augers: depth generally restricted to <150 feet. Bucket augers: restricted to depths of 50 feet or less.

For drilling in rocky soils, always recommend heavy-duty augers to avoid damage. These augers are equipped with a more durable tooth and side cutting blades as well as heavy-duty flighting.

Performance. Manual post-hole diggers consume a significant amount of time and require intensive labor, whereas augers can dig much more quickly and efficiently.

Usually, about 5 or 6 feet will be about the limit. Other than that limitation, it could dig all the way to bedrock. As long as the shaft or it hits a layer too hard to cut. I've gone 12 feet with a hand auger so it's a pretty deep hole with 2 men.

To select the right auger, consider your intended use. A 2- or 3-inch auger is sufficient for planting smaller items like plugs and bulbs. For burying stakes, setting small posts, or planting larger shrubs, opt for a 4-inch or larger auger. Consider the length of the auger for comfort and efficiency.

Why won't my auger go down into the ground? There are many variables, but the most common is that the ground is hard, and requires extra weight. The optional down pressure kit will help in this condition.