The Only Guide To A Drill Rod You’ll Ever Need
A drill rod is a common term in the machinery and manufacturing industries. You can use drill rods to manufacture various tools such as cutters, hot-work tools, machine parts, punches, files, and more. But, do we know how to choose the right drill rod for our needs?
Drill rods differentiate in regards to toughness, durability, temperature resistance, and applications. With so many different material grades and types to choose from, how do we ensure we choose the correct drill rod?
That’s where we come in – this is the only guide you’ll ever need to drill rods, their uses, and applications. This guide is suitable for complete beginners as well as professionals in the industry.
Let’s see some of the most frequently asked questions on the subject of drill rods!
What Is a Drill Rod?
Simply put, a drill rod is a lengthier steel piece of easy-to-mold tool steel that you can use for machining to produce different tools and parts.
Typically, drill rods are round. However, there are some square ones, such as the square kellys you’ll see below. Drill rods are generally soft enough to be machined into their final form.
Drill rods need to have a clean and smooth surface. To manufacture them in this way, we usually use precision grinding.
What Is a Drill Rod Used For?
Drill rods have many different applications. Producers usually use drill rods for manufacturing drilling bits, shafts, dowel pins, reamers, punches, taps, hammers, files, cutting tools, hot-work tools, etc.
Types of Drill Rods According to the Manufacturing Process
According to the manufacturing process they go through, there are three different types of drill rods: air-hardening, water-hardening, and oil-hardening. Each of these drill rods has various uses and applications. Let’s explain something about each of these different types of manufacturing processes and drill rods & casing.
Types of Drill Rods According to Different Threads
We can classify drill rods into three different types according to different threads: ordinary drilling rigs, square kelly rods, and heavy-weight drill pipes.
The Ordinary Drill Rod
We can easily recognize the ordinary drill rod since it’s the central or basic part of the drill stem. At the top, the ordinary drill rod connects to the square kelly (explained below), and at the bottom, it’s attached to the drill collar.
In borehole digging, the function of the ordinary drill rod is to deepen the hole, transmit torque, and move the drill up and down.
Drill Bit Material Types & Coating - Types of Drill Bits
1. Carbon Steel Drill Bit
– Low carbon steel: this is the cheapest option for making a drill bit, due to their poor tempers, low carbon steel drill bits are usually used for drilling softwood and some plastics, and require to be sharpened often to extend the lifespan.
Reaming shells are used to maintain the diameter of the bore hole and to make sure other drilling equipment does not get stuck down the hole. The outside surface of the reaming shell has natural and synthetic diamonds embedded in a resistant matrix.