RDBN is a new, stronger Ball Nose insert that will stand up to more demanding applications – heavier cuts, long tool overhangs and tougher materials.

Demo Applications

Heavy 3D Rough - 1018 Steel

.030-.500" DOC (full ball) / 90 IPM / .075" stepover

Hard Milling Semi-Finish - Hardened H13 (50 RC)

5000 RPM / 200 IPM / .035" DOC & WOC / .035" stepover

Corner Rounding - 1018 Low-Carbon Steel

7000 RPM / 300 IPM / .035" stepdown

RDBN inserts fit all of our current standard Ball Nose cutter bodies – solid steel (BNEM), carbide core (CC-BNEM) and solid carbide (SC-BNEM). They feature:

  • A tougher carbide substrate for added chipping resistance
  • Stronger ground cutting edges for extra strength and durability
  • Helical geometry for reduced cutting forces

These inserts are available in two new coatings: TS for general-purpose machining in steels, irons, and stainless steels; and HM for hardened steels and high-temperature materials.

Let's Discuss Your Application!


Dapra cutting tools are made in the USA. Try Ball Nose finishing mills with RDBN inserts risk-free through our Guaranteed Test Order program and receive a free Mini Maglite or camo hat. Click here for details.