fiberglass trough cover

A rock drill extension rod, as the name implies, is an additional shaft attached to a primary drill rod, designed to extend the drilling depth and range. It is primarily used with percussion or rotary rock drills, which are employed for drilling through hard and abrasive rock formations. These rods are made from high-strength materials like alloy steel, ensuring durability and resistance against the harsh conditions encountered in drilling applications.

...

The choice of drill rod steel is crucial due to the harsh conditions it encounters. It needs to be strong enough to resist bending and breaking under immense pressure, while also being resilient against wear and tear caused by friction and abrasive materials. Typically, drill rod steel is composed of high-carbon alloy steels, often containing elements like manganese, chromium, and nickel to enhance strength, toughness, and resistance to corrosion.

...