Which gearbox oil

In less severe applications, antiwear additives may also be used to provide wear protection under boundary lubrication conditions. Machine conditions that generally require antiscuff gear lubricants include heavy loads, slow speeds and shock loading. In addition to sulfur phosphorous and zinc dialkyl dithiophosphate ZDDP antiwear additives, several common solid materials are considered antiscuff additives including molybdenum-disulfide moly , graphite and borates.

One benefit of these additives is they do not depend on temperature to become active, unlike sulfur phosphorous compounds which do not become active until a high surface temperature is achieved.

Another potentially negative aspect of sulfur phosphorous EP additives is they can be corrosive to machine surfaces, especially at high temperatures. This type of additive may also be corrosive to yellow metals and should not be used in applications with components made of these materials, such as worm gears.

The compounded gear lubricant is the third type of common lubricant. In general, a compounded lubricant is mixed with a synthetic fatty acid sometimes referred to as fat to increase its lubricity and film strength.

The most common application for these gear lubricants is worm gear applications. Because of sliding contact and the negative effects of EP agents, compounded lubricants are generally the best choice for these applications.

Compounded oils are also referred to as cylinder oils because these lubricants were originally formulated for steam cylinder applications. High-quality mineral base oils perform well in most applications. In fact, mineral base oils typically have higher pressure-viscosity coefficients than common synthetics, allowing for greater film thickness at given operating viscosities. There are, however, situations where synthetic base oils are preferable. Many synthetic base stocks have greater inherent resistance to oxidation and thermal degradation making them preferable for applications with high operating temperatures and, in some cases, allowing for extended service intervals.

Additionally, synthetics perform better in machines subjected to low ambient temperatures due to their high viscosity index and low pour points. The high viscosity index also makes synthetic products suitable for a wider range of ambient temperatures, eliminating the need for seasonal oil changes. Some synthetics may also offer greater lubricity which reduces friction in sliding contacts.

Selecting lubricants for industrial gearing is similar in most applications. There is no specific property or value to create a good specification. To identify the best choice for a given application, the right viscosity, base oil and type of lubricant must be selected and the appropriate performance properties evaluated.

For more information on this topic, please see the references listed below. Robert Errichello. March We encourage you to read our updated Privacy Policy Hide. Toggle navigation Toggle search. Rajkot, Gujarat. Shinai, Kutch, Dist. Kachchh, Gujarat. Kolkata Marshall House, Shop No. Kolkata, West Bengal. Jaipur, Rajasthan. Sector 80, Noida, Dist. Gautam Budh Nagar, Uttar Pradesh. Punagam, Surat Plot No. Nana Varachha, Surat Plot No.

Howrah, West Bengal. Ambattur, Chennai No. Chennai, Tamil Nadu. New Delhi KH. Bengaluru, Karnataka. Sion, Mumbai No. Purav Marg, Sion, Mumbai - , Dist. Ahmedabad, Gujarat. Puzhal, Chennai No. Have a requirement? Get Best Price. Gear Oil products available Video. View by: Product Supplier. Location Near Me. Skip to main content. Search form. Toggle navigation. Cylinder oil.