Keep-Nut CNC Drill Bit, 11.8mm, 1/2 GAS for Natural Stone and Quartz



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The Kep-Nut 11.8mm CNC Bit is a Diamond Drill Bit, 1/2 GAS for drilling KEEP-NUT™ press-in self-anchoring insert holes. This 11.8mm CNC bit is ideal for Keep-Nut anchor hole drilling on natural stones and engineered quartz. 

CNC Bit recommendations Natural Stone and Quartz:

  • Diameter: 11.8 mm +/- .2mm
  • RPM: 4500-5000 suggested RPM’s
  • Feed-rate: Between 1.25″ -1.5″ /min (approx – 32-38mm/min )
  • Cooling: Both Spindle and Halo cooling advised
  • Depth: Depth should match the height of the insert so that Keep-nuts are flush with the surface when

    • E.G. H6=6.5mm, H8.5 = 8.5mm, H15 = 15mm depth



Additional information

Weight 0.25 lbs
Dimensions 1.00 × 2.75 × 1.00 in

Thread Size

Keep Nut Allen Post

Must Ship Freight


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