The lubrication of large gears represents a special challenge for lubricant formulators. The transmission of power by open gears is common to equipment used in mining, mineral processing and milling applications. This type of equipment is often placed into service in extreme temperature climates or subject to contamination from continuous operation in wet or dirty environments. Equipment manufacturers will often provide specifications for service lubricants; however each OEM has their own idea of what qualities are most important. In many instances, these ideas are based upon theoretical concepts, while others are based on the physical and performance characteristics of field proven products. As a result, there are numerous specifications that are often times in conflict with each other. This paper will provide formulation examples designed to meet the operational requirements for open gear lubricants as dictated by published specifications. In addition, candidate formulations will be compared to commercial products in several performance bench tests.
展开▼
