Bearing Engineering Suite
Standards & guide →κ, grease life, and relubrication
Bearing lubrication
Viscosity ratio κ = ν/ν₁ and contamination eC drive ISO 281 aISO. Grease life is a screening estimate — confirm with OEM charts for critical duty.
mm
rpm
cSt
°C
Rated ν₁
0.8 cSt
κ
53.33
eC
0.5
Grease L10h (screen)
5,315 h
- Oil bath / circulating oil: use operating viscosity at bearing temperature.
- Grease: effective base-oil viscosity drops with temperature — derate accordingly.
- Oil mist / jet: specialty high-speed practice — treat catalog n_lim carefully.
Feed κ and eC into the life calculator.