-Allow to drill occasional longer hole by adding a second rod on the feed without having to bring people on the front danger area of the machine.

-Improve versatility and safety.


Occasionally, it might be necessary to drill holes longer than the standard rod length used, i.e. drilling investigation holes, holes for grouting etc.

For this purpose, Sandvik has developed the TRS two rods system that allow to had safely a second rod on the feed.
The TRS can be retrofitted to TF feeds on tunneling drills.

The TRS consists of two grippers with cylinders to hold one rod at a time in jaws, a rod retainer to hold the rod during coupling / uncoupling (TRR1 or SCR) , an opening travelling centralizer to allow adding / removing rods from the center line, and a limit plate to help positioning the rods in the grippers.

The drilling starts with one rod in the feed, and another in the grippers. When the first rod is drilled, the second rod is placed in the feed by the grippers.

Additional rods can be loaded manually in the gripper. A safety wire is installed near the TRS to allow immediate emergency stop in case of issue.

The TRS Upgrade Solution Retrofit kit is delivered fully adapted to customer’s rods specifications, with all needed parts including controls and hoses harness.

Application area

Application modification

Tunneling drills

Sandvik DT1131, Sandvik DT1131i, Sandvik DT1231, Sandvik DT1231i, Sandvik DT1331i, Sandvik DT621, Sandvik DT720, Sandvik DT721, Sandvik DT912D, Sandvik DT921i, Sandvik DT922i