MITSUBISHI MATERIALS CORPORATION
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 CBN(SINTERED CBN)
Micro-Structure of MB730
Micro-Structure of MB730
  • MB710 and MB730 for cast iron cutting.
  • MB730 is suitable for High-speed Milling of cast iron.
SELECTION STANDARD / RECOMMENDED CUTTING CONDITIONS
Workpiece Structure Cutting Speed (m/min) Feed
(mm/rev)
Depth of Cut
(mm)
Coolant
Gray Cast Iron Ferritic + Pearilitic -0.3 -0.5 Dry
Pearilitic

FEATURES AND BASE
Grade Application Features Main Component
MB710 For General Cutting General purpose grade with well balanced wear and fracture resistance. CBN
TiC
Al2O3
MB730 For High Speed Cutting Has the largest CBN content and therefore displays good thermal conductivity.
It is suitable for the high temperatures that are generated in high speed cutting.
CBN (High Content)
Co Base Alloy

CUTTING PERFORMANCE
Application Examples
Tool AF5000R0404D
Insert LDCN190412R (MB730)
Machine Machining Centre
Workpiece
Cutting Condition Cutting Speed (m/min) 1200
Depth of Cut (mm) 0.3
Width of Cut (mm) 75
Width of Cut (mm) 5000
Feed per Tooth (mm/tooth) 0.33
Result Excellent surface roughness (Rmax is 2.7µm or less), even though in cast (DIN GG25) machining.