Attività

If you’re not sure what the term “oil-hardening” means, it implies heating the rod until it’s glowing red and then

dipping it into a pool of warm oil. With this, the steel becomes hard and ready for machining or welding.

Water-Hardening

And finally, we have the water-hardening drill rods, which portray the lowest alloy content but are excellent for

machining. However, they’re deficient in alloy content, which signifies that they’re not structurally suitable for welding

purposes.

To harden a drill rod with water, we first heat the steel until it becomes glowing red, and then we plunge it into a pool

of water to cool off. Once the metal is hard, it can be easily machined but not welded. You can usually use water-hardening

drill rods for the manufacturing of files or hammers.

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