• Product Lineup
  • Type of Alloys Handled
  • Initiatives in New Material Development
  • Introduction to Kaibara Original Materials

Introduction to Kaibara Original Materials

Although bronze, lead bronze and phosphor bronze are often used as JIS copper alloy frictional parts due to their excellent seizure resistance, there are problems with the strength of these materials. On the other hand, materials such as aluminium bronze and high-strength brass may have excellent strength but poor seizure resistance. Therefore it has been difficult to meet continuously harsh, high-speed and high-pressures conditions in recent years.
Kaibara original materials were developed to solve all these problems.
In particular, alloys made of crystallized metallic compounds such as Mn5Si3 are not only strong but also exhibit the same low frictional coefficient as graphite and molybdenum disulphide and have excellent seizure and wear resistance.
In addition, alloys made of crystallized metallic compounds such as Fe3Si exhibit spherical crystals with improved adhesive wear resistance without a drop in the matrix strength.

Kaibara original material KMS Series
Symbol Type of Alloy Main Component Alloy Characteristics and Applications
KMS6 High-Strength Brass Series Cu-Zn-Al-Mn-Si

Mn5Si3Compound precipitation-type
Good wear resistance
Often used in tempered materials
→ High toughness and fatigue strength

Shoe hydraulic equipment components etc.

KMS7 High-Strength Brass Series Cu-Zn-Al-Mn-Si

Mn5Si3Compound precipitation-type
Good wear resistance
Often used in As Cast

Worm wheel and liner
Spherical bush and cradle bearing
Cylinder block and bush etc.

KMS9 High-Strength Brass Series Cu-Zn-Al-Mn-Si-Ni-(Pb)

Mn5Si3Compound precipitation-type
Good seizure and wear resistance
High hardness and good erosion resistance

Valve plate
Cradle bearing etc.

KMS11 High-Strength Brass Series Cu-Zn-Mn-Si-Ni-Pb

Mn5Si3Compound precipitation-type
Good wear resistance
Often used in tempered materials

Valve plate
Bush
Cylinder block etc.

KMS2001 High-strength brass Series Cu-Zn-Mn-Si-Ni-Pb

Mn5Si3Compound precipitation-type
Good wear resistance
Suitable as a replacement for BC, LBC and PBC

Bush, liner etc.

KMS101 Aluminium bronze Series Cu-Al-Mn-Si

Mn5Si3Compound precipitation-type
Good wear resistance
Used in As Cast

Bush, liner etc.
(high pressure, low speed use)

KMS102 Aluminium bronze Series Cu-Al-Mn-Si

Mn5Si3Compound precipitation-type
Good wear resistance
Large fatigue strength
KMS101 tempered materials

Bush and liner
(ultra-high pressure and low speed use)
Hydraulic shovel bush etc.
(for KC metal use)

SKB7 Aluminium bronze Series Cu-Al-Fe-Si

Fe3Si compound precipitation-type
Good wear resistance

Worm wheels etc.

SKB8 Aluminium bronze Series Cu-Al-Fe-Si

Fe3Si compound precipitation-type
Good seizure and wear resistance
Good erosion resistance

Shoe
Valve plate
Worm wheel etc.