ISO Viscosity Grades (Quick Reference)
Reference table for common ISO viscosity grades and nominal kinematic viscosity ranges at 40°C.
This page provides a neutral ISO VG reference table. ISO VG grade is defined by kinematic viscosity at 40°C. Selection depends on equipment specification and operating conditions.
Classification Table
| ISO VG | Nominal Viscosity @40°C (cSt) | Typical Use (non-prescriptive) |
|---|---|---|
| ISO VG 32 | 28.8–35.2 | Hydraulic systems (application-dependent) |
| ISO VG 46 | 41.4–50.6 | Hydraulic systems (application-dependent) |
| ISO VG 68 | 61.2–74.8 | Gearboxes and hydraulics (application-dependent) |
| ISO VG 100 | 90.0–110 | Industrial gear and circulating systems (application-dependent) |
Notes & Limitations
- - Values are nominal grade ranges; confirm current standard publication for definitive ranges.
Sources
- ISO viscosity classification (published ranges)
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