Gear oils

Optimal Oil offers a wide range of gear oils in grades 32, 46, 68, 100, 150, and 220 with delivery across Ukraine.
Available packaging from 1 to 200 liters, wholesale prices for regular customers, fast shipping via Nova Poshta and transport companies.
We will help you choose the right oil for your equipment and provide quality certificates.

A gearbox (reducer) is a key component of many mechanical machines, and its stable operation determines not only productivity but also the service life of the equipment. One of the most important factors affecting gearbox condition is the proper selection of oil. Using unsuitable oil (such as engine oil or transmission oil for gearboxes) can lead to accelerated wear of parts and costly repairs.

How a Gearbox Works

The principle of a gearbox is similar to other mechanisms with shafts, gears, and bearings. For stable operation of the gear teeth engagement points and worm drives, high-quality and intensive lubrication is required. However, using standard lubricants is unacceptable here. The reason is that a gearbox constantly operates under significant loads related to torque transmission and changes in rotation speed.

Gearbox mechanisms operate under constant pressure and are subject to changes in force direction. This creates additional loads and causes separation of working surfaces. Over time, this can result in increased pressure at contact points, leading to accelerated wear of components. To avoid breakdowns and equipment downtime, only specialized gearbox oils recommended by the manufacturer should be used.

Characteristics and Types of Gearbox Oils

Gearbox oil is a specialized lubricant designed to work under high loads and constant pressure typical for gearboxes. Its composition provides protection for gears, bearings, and other moving parts against wear, corrosion, and overheating.

When selecting gearbox oil, it is important to consider:

• Viscosity grade (ISO VG) — determines the thickness of the oil film and its ability to adhere to working surfaces at different temperatures.

• Operating temperature range — oil must remain stable at both low and high temperatures.

• Gearbox design type — different formulations are used for reversing, multi-stage, and high-speed gearboxes.

• Additive content — anti-wear, anti-corrosion, antioxidant, and extreme-pressure additives.

Viscosity grades and applications:

• ISO VG 32–68 — for high-speed and light industrial gearboxes.

• ISO VG 100–150 — for equipment with medium and high loads.

• ISO VG 220 and above — for heavy-duty gearboxes operating under extreme loads and temperatures.

Using inappropriate oil, such as engine oil or standard transmission oil, can lead to accelerated wear of parts and reduced gearbox lifespan.

Types and Guidelines for Selecting Gearbox Oils

Gearbox oils are divided into three main categories: solid, liquid, and semi-fluid (grease-based). When selecting, it is important to consider:

• viscosity;

• temperature performance;

• lubrication capability;

• pour point (lowest temperature at which oil remains fluid);

• climate conditions and gearbox design features.

Selection examples:

• For reversing gearboxes with frequent rotation direction changes — oils with high viscosity.

• For multi-stage models — oils with medium viscosity.

• For high-speed gearboxes — formulations that create an “oil mist” effect for improved lubrication.

When to Change Gearbox Oil

Oil change intervals depend on operating conditions and machine runtime. The heavier the load, the more frequent the maintenance required. On average, it is recommended to change the oil every 6–12 months or according to the manufacturer’s instructions. Delayed oil changes or using the wrong type of oil can cause breakdowns and accelerated wear.

Optimal Oil Gearbox Oils — Product Range

We offer the following oil grades with different viscosities and applications:

• ISO VG 32 — for equipment operating at low temperatures.

• ISO VG 46 — universal industrial oil.

• ISO VG 68 — for standard industrial gearboxes.

• ISO VG 100 — for heavy-duty machinery.

• ISO VG 150 — for equipment operating at elevated temperatures.

• ISO VG 220 — for heavy gearboxes and extreme operating conditions.

How to Order Optimal Gearbox Oil

Contact us at: +38 (050) 407-55-51 or submit a request via our website.
Nationwide delivery across Ukraine, fast dispatch, and a flexible discount system for wholesale buyers.