Why choose a 2-speed Auger drive over a single speed one?

posted by Sunil Newatia on May 7th, 2021
Power of an Auger drive is a combination of speed and torque. You need a lower torque and higher speed when drilling in soft soil and a high torque and low speed when digging in a hard soil. Auger drives generally come with a single speed / torque configuration, which can however be changed controlling the oil flow to the drive. This is easier said than done and may take a while and a flow meter to carry out the adjustment. 
Working with multiple sized auger bits or often in different ground conditions can increase the expense and waste of time waste for changing the flow on the machine or changing the drive, for the different applications. 
Speed and torque are always a trade-off; when you increase your speed you lose power and when you increase your power, you lose speed. Similar to a manual car, fourth gear allows speed but struggles with the power required to get the vehicle climb up the hill. 
Standard, single speed drives are typically manufactured as a cost effective solution to provide a speed and torque to suit most applications but will give you either the speed or the power! 
Digga is first and only manufacturer to introduce 2 speed drilling drives that have grown in popularity over the last few. “We understand that for our customers time is money and so, our range of 2 speed drive units have been designed to help customers work more efficiently - providing one drive to operate in all conditions”. The two speed drive is ideal for anyone who drills in a variety of different ground conditions and with a range of different diameter auger bits. As the name suggests, two speed drives have two speeds in one unit:
·                Low-speed high-torque setting and,
·                High-speed low-torque setting
The Digga 2 speed drive units give operators the option to switch between power and speed. Rather than needing 2 drives (1 for smaller diameter auger bits and softer grounds and 1 for larger diameter auger bits and harder grounds), the Digga 2 speed drive unit gives operators both functionalities in one drive. 
Features and benefits of the Digga 2 speed drive range
There are a number of key features and benefits of a 2 speed drive over the standard single speed, such as: 
·                Save time and money by eliminating the need for multiple drive units
·                2 speed drillling drives are made with Eaton motors and Digga made gearboxes. The electrical plugs are high quality waterproof "Deutsch" connectors offer superior corrosion protection and waterproof properties.
·                2 speed drives allow for quicker drilling with a small auger bit and in soft grounds, and more torque for drilling with a large auger bit or in hard ground.
·                Switch to high speed for faster spinoff of spoil on a high torque drive
·                The low speed / high torque setting is ideal for drilling in fracturable rock; higher RPMs in rock cause the teeth to “skate” over the rock making it glaze over and become harder.
·                The host machine can run at a lower engine RPM on certain drilling jobs therefore burning less fuel
·                With the same gearbox as a single speed drilling drive, it is the same cost to service as a single speed drive unit.
·                By drilling quicker, the job is finished faster so you can move onto the next job

It’s important to remember that single speed drive units have suited the market for over 30 years and unless you are working with multiple-sized auger bits, in different ground conditions regularly a single speed drive unit still remains a very adequate choice. 

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