When digging precise holes for applications such as fencing and decking, a compact utility loader auger is a must-have implement for contractors on the move. CUL augers can dig from 6 to 36 in. wide and down to 5 ft deep, removing spoils for easy installation. Auger power head attachments offered on today's market are designed with a range of speed and torque capabilities. A high-speed auger power head will offer limited torque, while an auger power head with high torque will offer less speed.

High-speed augers are generally used for applications that require smaller auger bits such as fence post digging. The flights (or spirals) that go down the shaft of the auger bit on the smaller augers do not hold dirt as well as the flights on larger auger bits, so speed is needed to clean out the hole as the auger is removed. Auger power heads featuring more torque and less speed will better serve contractors working on projects requiring larger auger bits and big products.

Because the flights on larger augers hold dirt and remove it as they are lifted out of the hole, speed is not required to clean out the hole. However, larger auger bits are designed with more digging teeth to increase their effectiveness in difficult digging conditions. Many augers also come with the option of direct hydraulic drive or planetary gear drive. Planetary drive allows operators to dig in harder soils (like clay and rock) and direct hydraulic dive is often used in most other soil types (and usually costs\ less).

Extra auger features might include the ability to go in forward and reverse. If the auger gets stuck on roots or debris and is not able to go in reverse, the operator will have to disconnect the power head and pry the auger out of the ground. The shaft that the auger bit attaches to can allow the auger to swivel in all directions or to merely pivot backward and forward. Once again, the appropriate pivot ability depends primarily on the application and the auger bit being used. Power heads that allow pivoting in all directions give operators the ability to dig straight holes even if the base unit is on a hill, slope or uneven terrain.

Additionally, contractors should consider the construction of the pivot pins and teeth. The pivot pins attach the power head to the male mount plate and should be sturdy and greaseable. Most augers come with regular hardened-steel teeth and pilots. However, most manufacturers offer a range of options for the teeth and pilots. Contractors planning to use their auger attachment to dig in harsh conditions may consider upgrading to stronger materials such as hardened carbide for their teeth and pilots. Augers can range in price from $1,500 to $4,000.

- By Keith Gribbins, managing editor of Compact Equipment.