MITSUBISHI MATERIALS CORPORATION
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CBN(SINTERED CBN)
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
Work Material Structure Cutting Speed (SFM) Feed
(inch/rev)		 Depth of Cut
(inch)		 Coolant
820 1640 2460 3280 4100
Gray Cast Iron Ferritic + Pearilitic MB710-MB730 －.012 －.020 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
V-T Diagram
Application Examples
Tool AF5000R0404D
Insert LDCN190412R (MB730)
Machine Machining Center
Workpiece AISI-35
Cutting Condition Cutting Speed (SFM) 3940
Depth of Cut (inch) .012
Width of Cut (inch) 2.95
Table Feed (inch/min) 197
Feed per Tooth (inch/tooth) .013
Result Excellent surface roughness (Rmax is .106μinch or less), even though in cast (AISI-35) machining.