Products and Technology

Self-lubricating BEARPHITE

Self-lubricating sintered bearings are usable bearings in dry environments that dislike oil was developed by optimizing material composition.


  • As using 5-times graphite of bronze based material, developed material achieves excellent sliding properties in dry environment.
  • Optimized material composition secures formability in manufacturing process
  • Non impregnated oil, and with conductivity

material Chemical composition wt%
Cu C other
Developed material 85 5 10
Bronze based materia 89 1 10
Examples of use

Bearings for office equipment

Power supply Chip for photocopiers

Bearings for head lamp

Friction and anti-wear

Test conditions
  • Rotation speed 450 min-1-1
  • Load 15 N
  • Test time 1h
  • Shaft materials SUS420J2

Materials Wear rate
Developed material 0.2 〜 0.3
Bronze based material NON Oil-Impregnated : about 0.45
Oil-Impregnated : about 0.1

1/2 wear rate in dry environment, compared with bronze based materials.