In a brick factory in the region of Tula, Russia, the steel shaft of a clay mixer was broken. It was quickly determined that the stuck shaft had to be removed in order to continue with the production of the bricks. For this job, DIAMONDTECH CONSTRUCTION from Moscow was assigned, and the company did not hesitate to take on the demanding task. After 11 hours of work and seven re-grindings, the pure steel shaft was loose and the stuck shaft with a length of 60 cm was removed successfully.



For the completion of the job DIAMONDTECH CONSTRUCTION equipped a core drill bit with a diameter of 132 mm with 14 TYROLIT PREMIUM 840 U-Cut segments. As a drill motor, the Pentruder NTGRA was used. The sharpening of the TYROLIT segments was not necessary, even with the powerful Pentruder drill motor at 750-760 rpm, and therefore they were convincing all along the line.

Product Information

The PREMIUM 840 U-Cut Segments are also used for TYROLIT PREMIUM CD840 Wet Drill Bits


  • Quality tools for the most demanding applications and maximum cost efficiency.
  • Segment geometry for a high stock removal rate
  • Laser-welded segments up to Ø 300 mm for maximum safety


TYROLIT PREMIUM 840 U-Cut Segments


  • For reinforced concrete
  • Universal use
  • Segment height of 11.3 mm for a long lifetime