What Does ISO 460 Mean? | Lubripedia

ISO 460 refers to an ISO viscosity grade (VG) of lubricating oil, as defined by the International Organisation for Standardisation (ISO) under standard ISO 3448.
It represents an oil with a kinematic viscosity of approximately 460 mm²/s (centistokes) at 40 °C. Oils of this grade are thick and designed for use in heavy-duty gearboxes, bearings, and other applications that operate under high loads and relatively low speeds.

What Is ISO 460?

ISO 460 is part of the ISO VG (Viscosity Grade) system — a globally recognised classification that categorises lubricating oils according to their viscosity at 40 °C.
Each grade number (e.g., ISO VG 32, 68, 100, 220, 460, etc.) corresponds to a specific viscosity range.

ISO VG 460 oils have a viscosity range between 414 and 506 mm²/s at 40 °C.

These oils are considered high-viscosity and provide strong oil films for protection against wear and surface damage.

Why Is ISO 460 Important?

The viscosity of an oil directly affects:

• Lubrication performance – thicker oils provide stronger film strength.
• Energy efficiency – higher viscosity can increase resistance and heat generation.
• Component longevity – correct viscosity prevents metal-to-metal contact and reduces wear.

Selecting the right ISO VG ensures machinery operates efficiently, reliably, and with minimal wear.

Typical Applications of ISO VG 460 Oils:

• Industrial gearboxes and reduction drives
• Slow-speed plain and rolling element bearings
• Heavy-duty chain drives
• Enclosed gears in mining, steel, and cement industries