The RUBI DRYGRES PREMIUM 28 mm diamond drill bit is designed for drilling holes in hard ceramic tiles, it is also suitable for drilling holes in natural stone (e.g. granite, marble). It is designed for dry drilling with an angle grinder or with a drill using a reduction. Thanks to the vacuum welding in production and the use of high-quality materials with high diamond density, its advantages are high drilling speed and extra long service life. The crown diameter is 28 mm.
The crown has side holes designed for cooling during drilling. This results in lower temperatures and longer crown life. Adequate pressure must be applied to the crown when drilling, as excessive pressure can overheat the crown and destroy it.
Diameter: 28 mm
Drilling depth: 30 mm
Use: angle grinder
Max. speed: 14 000 rpm.
Drilling: dry drilling
Cooling: through holes
Improvements of the DRYGRES PREMIUM series compared to the DRYGRES series:
more than 2 times longer service life
improved cooling with side vents (Ø 20-85 mm)
Crown with interrupted segments (Ø 43-85 mm)
Countries of delivery
Slovakia, Czech Republic, Hungary, Poland, Slovenia, Romania and Austria