THE MOST POPULAR MINI EXCAVATOR ATTACHMENTS--Augers

The precision digging abilities of a compact excavator can be easily enhanced with the use of a simple auger attachment. By switching out a bucket for an auger, an excavator goes from a trenching and digging machine to a machine capable of drilling targeted holes for fence posts, piers, poles or trees in a variety of conditions.

One big advantage an excavator has when an auger is attached is reach. This reach can be used to raise the auger over obstacles such as shrubs, fences or holes. An excavator can be used to get an auger where it needs to be without disturbing the ground around it. The ability to reach farther can also help operators tackle tough jobs, such as reaching an area from the side of a road, instead of driving on uneven ground.

Typical auger attachment dig depths can reach about 60 in., with extensions available to dig deeper. Auger attachments can typically use bits from as small as 6 in. to as large as 42 in., depending on model and some models take both round and hex bit shafts. Drive options available include direct, chain and planetary.

One of the first steps in making sure an earth auger attachment will perform as desired is to ensure the attachment is compatible with its power source. This means the mini excavator must have adequate hydraulic flow and pressure ratings in order to provide enough power to the attachment. If the attachment is compatible, then the operator must also be sure to plumb the hydraulics correctly. After the hoses arehooked up, activate the hydraulics to ensure the auger rotates in the proper direction.

If this doesn’t happen, the hoses must be interchanged. In some cases, the augers will still turn in the right direction if hooked up improperly, but the performance will be extremely poor and excessive internal backpressure will be placed upon the auxiliary hydraulic system.

Auger attachments, with mounting frames, can range from about $1,500 to more than $5,000. There are many styles of auger bits available on the market. Small, light-duty bits start at about $200, while larger rock bits can cost close to $2,000.