CBN

High hardness and thermal resistance for machining hardened steel and hard cast

iron. High-speed finishing of gray cast iron with long tool life is also possible.

In 1977, Sumitomo Electric Hardmetal successfully developed a revolutionary CBN sintered tool called SUMIBORON. The

main component in SUMIBORON is cubic boron nitride with a special ceramic binder sintered under super high pressure and

temperature. Compared to other conventional tool materials, CBN has higher hardness and excellent thermal resistance. With these distinct characteristics, SUMIBORON can perform machining of hardened steel, hard cast iron and exotic alloys which was previously only done by grinding. Excellent efficiency and longer tool life can also be achieved from high-speed A finishing of cast iron.

Features

Structure FeaturesStructureCBN Content Hardness (GPa)GradeWork Materials/ApplicationsFeatures
Cast Iron, Titanium・Containing no binder, the nano-to sub-micron CBN
Purely CBNparticles have a directly bonded structure
High54Alloy, Pure Titanium,

particles, firmly NCB100 ・The high hardness and thermal conductivity make it

Co-Cr Alloy, Cemented highly efficient with a long tool life when machining bonded Carbide, Cermet exotic alloys such as titanium alloys and Co-Cr alloys Cemented Carbide,

Chilled Cast Iron, Ni-Hard ・High CBN content. Structure consists of

Mainly CBNBN700strongly fused CBN grains
Cast, Iron, Sintered
grains fusedBN7000Ferrous Alloy,・Suited to cutting cast iron, heat-resistant
BN7500
togetherHeat-resistant Alloy, Castalloy, cemented carbide and other

BNS800 Iron, Sintered Ferrous high-hardness materials Alloy BN1000/BN2000/BN350 ・CBN grains are fused together strongly

Mainly CBN Alloy Steel, Case Hardened Steel, BNX10/BNX20/BNX25 with a special ceramic binder grains held Carbon Tool Steel, Bearing Steel, ・Strong CBN binding provides superior BN500/BNC2010/BNC2020

together with aLow27Die Steel, Ductile Cast Ironwear resistance and toughness when
BNC300/BNC100/BNC160
bindercutting hardened steel and cast iron
BNC200/BNC500
Grade Map

Work Material Application High-speed Cutting Finishing to Light Cutting Medium Cutting Rough to Heavy Cutting

ClassificationH01H10H20H30
BNC2010
BNC2020BNC300
Coated

SUMIBORON BNC100 BNC160

BNC200 Hardened Steel BN1000 Uncoated BN2000

SUMIBORON

BNX10 BNX20 BNX25,BN350

Classification01102030
SinteredBN7500
AlloyUncoated
SUMIBORONBN7000
ClassificationK01K10K20K30
CoatedBNC500
SUMIBORON
NCB100
Cast IronUncoatedBN500
SUMIBORONBN7000
BNS800

Classification − S01 S10 S20 S30

NCB100 Uncoated BN7000 Exotic Alloy SUMIBORON BNS800

A32 *Dedicated for Ductile Cast Iron