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AISO Lubricants Group: Core Grease Category Classification and Selection Guide for High-Temperature Equipment
Release time:
2026-09-05
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AISO Lubricants Group: Core Grease Category Classification and Selection Guide for High-Temperature Equipment
In the industrial equipment operation and maintenance system, grease is a core consumable that ensures the stable operation of bearings, gears, and transmission components. It directly determines the equipment wear rate, operating noise, maintenance cycle, and service life. High-temperature conditions represent a major scenario of equipment loss. Improper grease selection will easily cause grease carbonization, loss, coking, and failure, leading to equipment stalling, overheating, shutdown and other faults.
With years of R&D and on-site service experience in the industrial lubrication industry, AISO Lubricants Group has systematically sorted out three core mainstream grease categories: general lithium grease, complex lithium grease, and extreme pressure grease. Focusing on exclusive high-temperature equipment scenarios, we provide accurate and implementable grease selection and application solutions, helping enterprises reduce costs, improve efficiency, and ensure long-term stable operation of equipment.
I. Detailed Introduction to Three Mainstream Core Grease Categories
Different types of greases vary significantly in thickening systems, additive formulas, temperature resistance, and load-bearing capacity, with differentiated applicable working conditions. Accurate identification of product characteristics is the foundation of scientific selection.
1. General Lithium Grease – Preferred Basic Industrial General-Purpose Lubricant
Applicable Scenarios: Mainly used for light-load, normal-temperature, and conventional-speed general industrial equipment, including ordinary motor bearings, small conveyor sprockets, light-load reducers, fan bearings, and sliding/rolling friction parts of general mechanical equipment. It also applies to conventional lubrication scenarios of civil machinery and ordinary automobile chassis.
AISO Selection Positioning: A standard product for daily routine equipment maintenance. Suitable for stable normal-temperature working conditions, it balances economy and practicality and serves as the basic lubrication standard configuration for enterprises.
2. Complex Lithium Grease – Special Grease for Long-Term Stable High-Temperature Operation
Adopting a complex lithium soap thickening system, complex lithium grease is an upgraded version of ordinary lithium grease. By optimizing the molecular structure and formula process, it completely breaks through the temperature resistance limit of ordinary lithium grease, with greatly improved high-temperature oxidation resistance and anti-loss performance. Its high-temperature service life is about 50% longer than that of ordinary lithium grease.
Core Performance Characteristics: It features outstanding high-temperature resistance, with a conventional operating temperature range of -40℃ to 180℃ and a maximum dropping point of 210–230℃. It resists softening, loss and carbonization coking under high temperatures effectively. With excellent colloidal stability and oxidation stability, it reduces bearing grease leakage and delivers superior long-term lubrication performance. Its water resistance, rust resistance and aging resistance are comprehensively better than ordinary lithium grease, making it adaptable to continuous high-temperature cyclic operation conditions.
Applicable Scenarios: Primarily applied to high-temperature, continuous-operation, and medium-to-heavy-load long-term lubrication scenarios in steel, chemical, building materials, wind power and other industries. Typical equipment includes high-temperature circulating pump bearings, air compressor connecting rods, wind power yaw systems, kiln transmission bearings, high-temperature drying equipment components, and industrial furnace blower parts that operate under long-term high-temperature conditions.
AISO Selection Positioning: The core lubrication product for high-temperature working conditions. Tailored for continuously high-temperature and non-stop operating equipment, it effectively reduces grease refilling frequency and equipment failure probability under high temperatures.
3. Extreme Pressure Grease – Special Grease for Heavy-Load Anti-Wear and Pressure Resistance
Mostly based on the extreme pressure lithium system, extreme pressure grease is added with exclusive lead-free extreme pressure anti-wear additives. Its core advantages lie in superior pressure-bearing, anti-wear and anti-impact capabilities, specifically solving friction and wear problems under heavy-load, impact-load and high-load conditions.
Core Performance Characteristics: It has an ultra-high load-bearing capacity with a PB value of 650–900N, far exceeding that of ordinary lithium grease. Under high-load, impact-load and vibration conditions, it can quickly form a high-strength pressure-resistant oil film to avoid direct metal contact, wear and pitting. It also features good mechanical stability, resisting softening and failure under heavy loads, as well as excellent water splash resistance and rust resistance for harsh and complex working conditions. Its conventional temperature resistance range is -20℃ to 130℃.
Applicable Scenarios: Focused on heavy-load, high-pressure, impact-load, dusty and humid harsh working conditions. It is suitable for mine crushers, engineering machinery slewing bearings, metallurgical roller bearings, heavy-duty reducers, transmission components of large load-bearing equipment, shield machines, and heavy-load gear friction pairs.
AISO Selection Positioning: A special grease for harsh heavy-load working conditions. It targets and solves problems such as excessive heavy-load wear, abnormal equipment noise and rapid component loss, greatly extending the service life of core components of heavy-duty equipment.
II. AISO Core Selection Guidelines for High-Temperature Equipment Grease
Core selection principle for high-temperature equipment grease: Take operating temperature as the core, combined with load magnitude, operating duration and environmental conditions for three-dimensional matching. Avoid arbitrary use of general grease and excessive use of high-temperature grease to achieve optimal lubrication effect and minimum operation and maintenance costs through accurate selection. Based on mainstream high-temperature equipment working conditions in the industry, AISO has summarized standardized grease selection schemes:
1. Temperature ≤ 120℃: Conventional High-Temperature Light-Load Equipment
For ordinary high-temperature fans, normal-temperature conveying equipment, light-duty high-temperature transmission components and other equipment with stable temperature within 120℃, uniform light-load operation and no impact load, AISO general lithium grease is the preferred choice. It fully adapts to the working conditions with stable lubrication and no failure, delivering the best cost performance and avoiding unnecessary cost waste from over-spec high-end grease selection.
2. Temperature 120℃–180℃: Continuously High-Temperature Operating Equipment
Most industrial high-temperature equipment operates within this temperature range, including kiln equipment, drying equipment, high-temperature pump bodies, air compressors, wind power equipment, and continuous chemical operation units. The core demands of such equipment are high-temperature resistance, coking resistance and long-term anti-loss performance. AISO complex lithium grease is the top choice.
This product can withstand long-term high temperatures up to 180℃ with excellent high-temperature oxidation and carbonization resistance, avoiding grease drying, bearing blockage and component adhesion. It features an extended long-term lubrication cycle and adapts to 24-hour continuous equipment operation, serving as the cost-effective priority for medium and high-temperature working conditions.
3. Temperature ≤ 130℃ + Heavy-Load Impact Conditions: High-Temperature Heavy-Load Equipment
For equipment in metallurgy, mining, heavy machinery and other industries with combined high-temperature, heavy-load, impact and vibration conditions (temperature not exceeding 130℃ and extremely high load), AISO extreme pressure lithium grease is preferred. It resists operating high temperatures of equipment and forms a high-strength oil film via extreme pressure additives to solve heavy-load wear, component pitting and equipment abnormal noise problems, adapting to harsh and complex high-temperature heavy-load scenarios.
4. Ultra-High Temperature & Heavy-Load Extreme Working Conditions
For core key equipment operating under ultra-high temperatures above 180℃ with simultaneous heavy-load impact, AISO extreme pressure complex lithium grease is recommended. It integrates the high-temperature resistance advantage of complex lithium grease and the heavy-load anti-wear advantage of extreme pressure grease, thoroughly solving the problems of rapid grease failure and frequent equipment faults under ultra-high temperature and heavy-load conditions, and ensuring the safe and stable operation of core equipment.
III. Key Mistakes to Avoid in High-Temperature Equipment Lubrication (AISO Professional Tips)
1. Strictly avoid mixing different grease categories: Greases of different systems have different formulas and soap base structures. Mixing them may cause chemical reactions, resulting in grease caking, failure and oil circuit blockage, which makes regular grease refilling ineffective for lubrication and protection.
2. Avoid overusing high-temperature grease for low-temperature equipment: Complex lithium grease and extreme pressure grease have higher viscosity and consistency. Using them for normal-temperature light-load equipment will increase equipment operating resistance, leading to higher energy consumption and redundant lubrication waste.
3. Never use ordinary lithium grease for high-temperature equipment: Long-term operation above 120℃ with ordinary lithium grease will rapidly cause grease carbonization, loss and coking, resulting in bearing overheating, stalling and equipment shutdown, and significantly increasing maintenance costs.
4. Implement regular and standardized grease replacement and refilling: Grease aging accelerates under high-temperature conditions. It is necessary to regularly clean old grease and replace with new grease in accordance with AISO working condition adaptation standards to avoid residual aged grease affecting lubrication performance.
IV. Core Advantages of AISO Greases
As a professional lubrication solution service provider, AISO Lubricants Group has built a full-range grease matrix for diverse working conditions: general lithium grease adapts to universal normal-temperature scenarios with high cost performance; complex lithium grease specializes in long-term high-temperature working conditions with stable and durable performance; extreme pressure grease focuses on harsh heavy-load scenarios with superior anti-wear protection.
All products adopt high-quality base oil and imported additives, strictly complying with industrial standards. They deliver excellent temperature resistance, anti-wear, oxidation resistance and rust resistance, fully meeting the lubrication needs of equipment in machinery, metallurgy, mining, chemical, building materials, wind power and other industries. Beyond high-quality lubrication products, AISO provides one-on-one working condition selection and operation & maintenance guidance services, helping enterprises optimize lubrication management systems and reduce equipment failure rates and operation & maintenance costs.
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