Epiroc TC drill strings

Boost your bench and production drilling productivity

The Epiroc TC drill string translates into a very real boost in productivity, with straighter holes, longer rod service life, and quicker bit changes that save time for operators. With Epiroc's TC-thread drill string, you can expect higher productivity and a better service life, resulting in lower cost of ownership.

The TC drill string is developed for mines and surface drilling projects where there is a demand for cable bolting and production drilling. Our drilling system comes in 2 dimensions: TC35, TC42B with hole ranges from 54 to 76 mm.

A more rigid drill string means fewer tensile shock waves that lead to the stresses causing thread breakage, extending the service life. Maintenance can be planned, less stock carried for replacements, and productivity optimized by drilling straighter and more accurate holes.

Adapted to the new generation of powerful hydraulic rock drills, the TC drill string transmits that power into the rock efficiently and reliably. With a faster rate of advance, it lowers the cost per drill meter, boosting productivity and increasing safety and operator efficiency.

For miners who want to push it to the limit

Drill more meters every day and between regrinds, while enjoying longer bit service life. It´s simply a drill bit for miners who won´t settle for anything but the fastest, most productive underground drilling imaginable. 

Increased service life - The premium Epiroc grade of carbide is harder and tougher than  ever before.

Improved rate of penetration - The bit design gives an optimized balance of bit diameter wear and penetration rate.

Straighter holes - By keeping a tighter match in between head and skirt diameter enables the bit to drill straighter holes due to less angular deflection.

Power in tophammer surface drilling

The bits are built to take on any rock, from hard to soft, and from abrasive to non-abrasive. These bits last much longer. They give the drillers more meters before the first regrind, and many more meters between the regrinds. With the bits, drillers are guaranteed to get more performance from each bit. 

Greatly improved service life

We’ve redesigned the bit shape, upgraded to tougher steel, and introduced patented button technology—resulting in a significantly longer service life.

Easy bit selection

Our streamlined bit range now covers all rock types with ~30% fewer options, making selection simpler and more versatile for any surface drilling job.

Longer grinding intervals

New button geometries and a special surface treatment mean fewer regrinds—delivering up to 15% more drilling per grind in most rock types.