{"id":1347,"date":"2026-09-04T18:00:46","date_gmt":"2026-09-04T10:00:46","guid":{"rendered":"https:\/\/www.anoilnoil.com\/?p=1347"},"modified":"2026-09-04T18:00:46","modified_gmt":"2026-09-04T10:00:46","slug":"was-ist-der-zweck-von-schmierstoffen-in-maschinen","status":"publish","type":"post","link":"https:\/\/www.anoilnoil.com\/de\/what-is-the-purpose-of-lubricants-in-machinery\/","title":{"rendered":"Was ist der Zweck von Schmierstoffen in Maschinen?"},"content":{"rendered":"

The primary purpose of a machinery lubricant<\/a><\/span> is to control friction and wear by creating a protective film between moving surfaces, while also helping remove heat, control contamination, prevent corrosion, and, in some systems, transmit power. This broad role is well established in tribology literature: ASTM describes friction and wear reduction as the principal function of lubricating oils and greases, while ASM Handbook, Volume 18: Friction, Lubrication, and Wear Technology defines lubricant function around controlling friction and wear in machine elements such as gears and bearings.<\/p>\n

Why Do Machines Need Lubricants?<\/h2>\n

Almost every machine contains components that move relative to one another. Bearings rotate against races, gears slide and roll against their mating teeth, shafts turn inside bearings, hydraulic components move under pressure, and chains articulate around pins and bushings. Even surfaces that appear smooth under normal inspection contain microscopic irregularities, often called asperities. When these surfaces interact directly, mechanical resistance and surface damage can increase rapidly.<\/p>\n

A machinery lubricant is introduced into these contact zones to control that interaction. Instead of allowing two solid surfaces to repeatedly collide and slide directly against each other, the lubricant creates a film or protective layer that changes the nature of the contact. Depending on the load, speed, temperature, viscosity, surface condition, and lubricant formulation, the system may operate under hydrodynamic, elastohydrodynamic, mixed, or boundary lubrication conditions. ASTM literature specifically notes that inadequate lubrication can appear as increased temperature, higher friction, and accelerated wear, while the appropriate lubrication regime depends strongly on operating conditions.<\/p>\n

This is why lubrication should not be regarded simply as \u201cputting oil on a machine.\u201d In an industrial environment, lubrication is part of the machine’s reliability strategy. The correct lubricant, at the correct quantity and cleanliness level, can influence energy consumption, component life, maintenance intervals, operating temperature, and the probability of unexpected failure.<\/p>\n

\"Lithiumfett\"
Lithiumfett<\/figcaption><\/figure>\n

What Is the Main Purpose of a Machinery Lubricant?<\/h2>\n

The simplest answer is to reduce harmful friction and wear, but that definition is incomplete for modern machinery. Industrial lubricants are multifunctional materials engineered to perform several jobs simultaneously, and the importance of each function changes according to the machine.<\/p>\n

ASTM’s technical literature describes friction and wear reduction as the major function of lubricating oils, while also identifying cooling, contaminant dispersion, corrosion protection, and the delivery of performance additives as important secondary roles. Noria’s machinery-lubrication training similarly identifies friction control, wear control, corrosion control, temperature control, contamination control, and power transmission among the major lubricant functions.<\/p>\n

The practical functions can therefore be organized into six major categories:<\/p>\n

Control friction<\/p>\n

Reduce mechanical and surface wear<\/p>\n

Remove or control heat<\/p>\n

Protect against rust and corrosion<\/p>\n

Control or transport contaminants<\/p>\n

Transmit power or perform specialized machine functions<\/p>\n

Some applications add further functions, including sealing, shock damping, noise reduction, and assisting in the removal or suspension of combustion products.<\/p>\n

How Does Lubricant Reduce Friction?<\/h2>\n

Friction occurs when surfaces resist relative motion. In an unlubricated metal-to-metal contact, microscopic asperities can interact directly, producing adhesion, deformation, plowing, and other forms of resistance. A suitable lubricant reduces this direct interaction by introducing a low-shear layer between the surfaces.<\/p>\n

In a fully developed fluid film, the moving surfaces can be largely separated by lubricant rather than continuously touching one another. The resistance then comes primarily from shearing the lubricant film instead of repeatedly breaking and deforming solid surface asperities. This is one reason lubricant viscosity is so important: it must be high enough to maintain an adequate film under the actual load and speed, but not so high that unnecessary viscous resistance consumes excessive energy.<\/p>\n

The relationship is not simply \u201chigher viscosity equals better lubrication.\u201d A lubricant that is excessively viscous can increase drag, generate additional heat, and reduce efficiency, particularly during startup or high-speed operation. Conversely, an oil that is too thin may fail to maintain adequate film thickness under load. Proper lubricant selection therefore requires consideration of load, speed, temperature, clearance, surface condition, and machine design, rather than choosing the thickest available oil.<\/p>\n

How Does Lubrication Prevent Machinery Wear?<\/h2>\n

Wear is one of the most expensive consequences of poor lubrication because it gradually changes the geometry and surface condition of machine components. Gears can develop scuffing or micropitting, bearings can experience fatigue and surface damage, and sliding components can lose material through adhesive or abrasive mechanisms.<\/p>\n

A properly selected machinery lubricant reduces wear by limiting direct surface contact and, where necessary, forming protective chemical films on the contacting surfaces. Anti-wear and extreme-pressure additives can become particularly important when the operating conditions prevent a sufficiently thick fluid film from completely separating the surfaces.<\/p>\n

This explains why lubricant selection should be based on the machine’s actual operating regime rather than simply on the base oil. ASTM notes that lubricating oils can carry specialized chemicals such as corrosion inhibitors, antiwear agents, load-carrying friction modifiers, and foam suppressors.<\/p>\n

For heavily loaded gears, for example, the lubricant must maintain adequate protection when pressure and temperature rise at the tooth contact. For high-speed bearings, the priority may shift toward controlling frictional losses, temperature, and viscosity-related drag. The same lubricant specification cannot automatically serve both applications simply because both machines contain metal surfaces.<\/p>\n

How Do Lubricants Control Machinery Temperature?<\/h2>\n

Every machine generates some heat during operation. Friction is one source, but heat can also enter through compression, electrical losses, ambient conditions, and process-related loads. If this heat cannot be controlled, lubricant viscosity can change, oxidation can accelerate, seals can deteriorate, and component clearances can move outside their intended range.<\/p>\n

Lubricating oil can act as a heat-transfer medium. In circulating lubrication systems, oil moves through bearings, gears, compressors, hydraulic components, or other hot areas and then carries heat toward a reservoir, heat exchanger, or cooling system. ASTM specifically identifies cooling as an important lubricant function, while industrial lubrication guidance emphasizes temperature control as one of the fundamental roles of lubricants.<\/p>\n

The cooling function becomes particularly important in high-speed machinery. A lubricant that provides good wear protection but creates excessive viscous drag may itself contribute to heat generation. Engineers therefore need to balance film strength, viscosity, flow characteristics, thermal stability, and cooling capacity.<\/p>\n

This is also why oil condition should be monitored rather than judged only by appearance. Excessive temperature can accelerate oxidation and eventually create deposits, varnish, sludge, or other degradation products that interfere with machine operation. Industrial lubricant guidance identifies heat, oxidation, contamination, and lubricant degradation as closely connected reliability issues.<\/p>\n

\"Extremdruck-Lithiumfett\"
Extremdruck-Lithiumfett<\/figcaption><\/figure>\n

How Does a Machinery Lubricant Prevent Corrosion?<\/h2>\n

Water, oxygen, acids, process chemicals, and other contaminants can attack metal surfaces when protective barriers are inadequate. Corrosion may begin even when the machine is not operating, particularly during storage, shutdown, or humid service conditions.<\/p>\n

Lubricants can protect surfaces by forming a physical or chemical barrier between the metal and corrosive substances. Formulations may also contain corrosion and rust inhibitors that provide additional surface protection. ASTM identifies corrosion inhibitors among the functional additives that can be carried by lubricating oils.<\/p>\n

This function is especially important for machinery exposed to moisture, washdown environments, outdoor conditions, marine atmospheres, or process chemicals. The lubricant must not only protect against friction-related damage but also remain chemically stable in the environment where the equipment operates.<\/p>\n

Water contamination deserves special attention because it can simultaneously damage the lubricant and the machine. It may promote corrosion, interfere with additive performance, reduce lubricant film strength, and contribute to other contamination problems. Noria’s machinery-lubrication training specifically highlights water contamination, oxidation, aeration, and contaminant control as central elements of lubricant management.<\/p>\n

How Do Lubricants Control Contamination?<\/h2>\n

A good lubricant does not make contamination disappear, but it can help manage contaminants so they cause less damage. In circulating oil systems, the lubricant can carry wear particles and other contaminants toward filters, separators, or other removal devices. ASTM describes contaminant removal as one of the important secondary functions of lubrication.<\/p>\n

At the same time, contamination control is a two-way problem. The lubricant itself needs protection from dirt, water, air, process chemicals, and wear debris, while the lubricant must help prevent those contaminants from damaging machine surfaces.<\/p>\n

For this reason, industrial lubrication programs typically address more than oil selection. Storage, handling, filtration, sealing, breather systems, transfer equipment, sampling, and oil analysis all contribute to lubricant cleanliness. Noria’s machinery-lubrication materials emphasize contaminant exclusion and removal, lubricant storage, filtration, water control, and condition monitoring as major components of effective lubrication management.<\/p>\n

Can Lubricants Transmit Power?<\/h2>\n

Yes. In some machinery, lubricant is not merely protecting moving parts; it is part of the power-transmission mechanism.<\/p>\n

Hydraulic systems are the clearest example. Hydraulic oil transmits pressure from a pump to actuators while simultaneously lubricating components, controlling wear, removing heat, and protecting internal surfaces. Automatic transmissions, fluid couplings, and certain clutch systems also use specialized fluids that combine lubrication with controlled power transmission.<\/p>\n

ASTM literature notes that lubricants can enable machines to operate at higher speeds, loads, temperatures, and power-to-weight ratios than would otherwise be practical. This is a useful reminder that lubrication is not simply a maintenance afterthought; it can be part of the machine’s functional design.<\/p>\n

Oil, Grease, or Solid Lubricant: Does the Form Matter?<\/h2>\n

The physical form of a lubricant affects where it can be used and how it behaves inside the machine. Industrial lubricants are commonly encountered as oils and greases, while specialized applications may use solid lubricants or other formulations.<\/p>\n

Oil is particularly useful when continuous circulation, cooling, high-speed operation, or contaminant filtration is required. Because oil can flow through the system, it can transport heat and contaminants away from critical components.<\/p>\n

Grease is better suited to applications where lubricant retention is important or where continuous oil circulation is impractical. ASTM describes grease as a lubricating fluid thickened so that it can remain more readily in the required area.<\/p>\n

The choice therefore depends on machine design rather than personal preference. Bearing speed, load, sealing arrangement, temperature, relubrication requirements, accessibility, and contamination exposure should all be considered before deciding between oil and grease.<\/p>\n\n\n\n\n\n\n\n\n
Lubricant type<\/b><\/strong><\/td>\nTypical machinery applications<\/b><\/strong><\/td>\nMain functional strengths<\/b><\/strong><\/td>\nImportant considerations<\/b><\/strong><\/td>\n<\/tr>\n
Industrial lubricating oil<\/td>\nGearboxes, compressors, turbines, hydraulic systems, circulating systems<\/td>\nFriction control, cooling, contaminant transport<\/td>\nCorrect viscosity, filtration, oxidation stability<\/td>\n<\/tr>\n
Lubricating grease<\/td>\nBearings, chassis, low-to-moderate speed components, sealed mechanisms<\/td>\nRetention, wear protection, corrosion protection<\/td>\nGrease consistency, compatibility, quantity<\/td>\n<\/tr>\n
Synthetic oil<\/td>\nHigh\/low-temperature or demanding industrial equipment<\/td>\nTemperature stability, long service potential<\/td>\nCost, seal\/material compatibility<\/td>\n<\/tr>\n
Solid lubricant<\/td>\nSpecialized high-temperature, vacuum, or low-lubricant environments<\/td>\nLow volatility, special operating capability<\/td>\nLimited use compared with oils and greases<\/td>\n<\/tr>\n
Specialty fluid<\/td>\nHydraulic, compressor, food-processing or process-specific equipment<\/td>\nApplication-specific performance<\/td>\nMust meet equipment and industry specifications<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

What Happens When Machinery Is Poorly Lubricated?<\/h2>\n

Poor lubrication does not always mean that a machine has no lubricant. In practice, the lubricant may be the wrong viscosity, contaminated, oxidized, incompatible, overfilled, underfilled, or applied at the wrong interval.<\/p>\n

This distinction is important because adding more lubricant does not necessarily solve a lubrication problem. Over-greasing can increase bearing temperature and resistance, while excessive oil levels can increase churning losses and heat generation. Conversely, insufficient lubricant can allow film collapse and accelerated surface damage.<\/p>\n

The condition of the lubricant can also tell engineers something about the machine itself. Wear particles, changes in viscosity, oxidation products, water, and other contaminants can indicate developing mechanical or environmental problems. Modern condition-based maintenance therefore increasingly treats lubricant analysis as a diagnostic tool rather than merely a means of deciding when to change the oil. Noria’s machinery-lubrication program specifically covers oil analysis, lubricant condition, wear debris, contamination, oxidation, and oil-drain optimization.<\/p>\n

How Does Lubricant Selection Affect Machine Reliability?<\/h2>\n

Choosing a machinery lubricant should begin with the machine manufacturer’s requirements and the actual operating conditions. Important variables include operating temperature, load, rotational speed, pressure, component materials, bearing or gear design, environmental exposure, contamination risk, and the required lubrication method.<\/p>\n

Viscosity is often one of the first properties engineers evaluate, but it is not the only one. Depending on the application, oxidation resistance, viscosity index, anti-wear performance, extreme-pressure behavior, rust protection, demulsibility, foam control, thermal stability, low-temperature behavior, and compatibility with seals and other materials may also be important.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
Selection factor<\/b><\/strong><\/td>\nWhy it matters<\/b><\/strong><\/td>\nTypical consequence of getting it wrong<\/b><\/strong><\/td>\n<\/tr>\n
Viscosity<\/td>\nDetermines film formation and fluid resistance<\/td>\nExcessive wear or excessive heat\/drag<\/td>\n<\/tr>\n
Operating temperature<\/td>\nChanges viscosity and oxidation rate<\/td>\nFilm loss, oxidation, deposits<\/td>\n<\/tr>\n
Load<\/td>\nDetermines required film strength and additive protection<\/td>\nScuffing, fatigue, surface damage<\/td>\n<\/tr>\n
Speed<\/td>\nInfluences film formation and viscous losses<\/td>\nOverheating or inadequate film<\/td>\n<\/tr>\n
Contamination exposure<\/td>\nDetermines filtration and fluid stability needs<\/td>\nAbrasive wear, corrosion, lubricant degradation<\/td>\n<\/tr>\n
Water exposure<\/td>\nInfluences rust, additive stability, and oil condition<\/td>\nCorrosion and accelerated degradation<\/td>\n<\/tr>\n
Material compatibility<\/td>\nPrevents damage to seals and machine materials<\/td>\nLeakage, swelling, cracking<\/td>\n<\/tr>\n
Additive requirements<\/td>\nProvides specialized protection<\/td>\nWear, corrosion, oxidation or foaming<\/td>\n<\/tr>\n
Lubricant compatibility<\/td>\nPrevents adverse interactions between products<\/td>\nDeposits, separation or loss of performance<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

A lubricant should therefore be considered part of the machine’s operating system, not an interchangeable consumable. ASM International describes lubricant function specifically in relation to friction and wear control within machine elements, reinforcing the importance of matching lubricant properties to the tribological system.<\/p>\n

Why Lubricant Quality Alone Is Not Enough?<\/h2>\n

A premium lubricant cannot compensate indefinitely for poor machine design, contamination, incorrect application, misalignment, excessive loading, or neglected maintenance. Lubrication works within a larger tribological system that includes the two contacting surfaces, their geometry, load, speed, temperature, environment, and lubricant.<\/p>\n

This is why two machines using the same oil can have completely different service lives. A lubricant that performs well in a clean, properly aligned gearbox may behave very differently in a contaminated gearbox operating above its intended load and temperature.<\/p>\n

The same principle applies to lubricant change intervals. A calendar-based oil change may be appropriate for some applications, but condition-based approaches can sometimes provide a better picture of actual lubricant health. Industrial lubrication programs increasingly combine lubricant selection, contamination control, oil analysis, storage practices, application methods, and reliability monitoring rather than treating each task independently.<\/p>\n

What Is the Purpose of Lubricants in Different Machines?<\/h2>\n

The basic purpose remains the same, but the dominant function changes according to equipment type. In a high-speed bearing, friction and temperature control may be critical; in a heavily loaded gearbox, film strength, wear protection, and extreme-pressure performance may dominate; in a hydraulic system, power transmission and cleanliness become particularly important.<\/p>\n

For compressors and turbines, oxidation resistance and thermal stability can be major concerns because lubricant degradation may occur under prolonged heat exposure. For food-processing equipment, lubricant selection must additionally consider regulatory and incidental-contact requirements. For outdoor machinery, corrosion and water resistance may become more important.<\/p>\n

This application-specific perspective is more useful than asking whether one lubricant is universally \u201cbetter.\u201d The right machinery lubricant is the one whose physical and chemical properties remain suitable throughout the machine’s actual operating envelope.<\/p>\n

FAQ: Machinery Lubricant<\/h2>\n
    \n
  1. What is the main purpose of a machinery lubricant?<\/li>\n<\/ol>\n

    The main purpose of a machinery lubricant is to reduce friction and wear between moving surfaces. It can also cool components, prevent corrosion, control contaminants, and perform other machine-specific functions.<\/p>\n

      \n
    1. How does a machinery lubricant reduce friction?<\/li>\n<\/ol>\n

      A lubricant forms a film or protective layer between surfaces and reduces direct solid-to-solid contact. This lowers resistance and helps reduce heat generation and surface damage.<\/p>\n

        \n
      1. Does lubricant prevent machine wear?<\/li>\n<\/ol>\n

        Proper lubrication can significantly reduce many forms of mechanical and surface wear. However, lubricant selection, cleanliness, quantity, temperature, load, and application method all affect the result.<\/p>\n

          \n
        1. What are the six main functions of lubricants?<\/li>\n<\/ol>\n

          The commonly recognized functions include friction control, wear control, temperature control, corrosion control, contamination control, and power transmission. Some specialized lubricants also provide sealing, damping, or other functions.<\/p>\n

            \n
          1. What happens if machinery is not lubricated properly?<\/li>\n<\/ol>\n

            Poor lubrication can cause higher friction, increased temperature, accelerated wear, corrosion, deposits, and eventually component failure. Using too much lubricant or the wrong lubricant can also create operating problems.<\/p>\n

              \n
            1. How do I choose the right machinery lubricant?<\/li>\n<\/ol>\n

              Start with the equipment manufacturer’s specification and evaluate viscosity, temperature, load, speed, contamination, materials, and lubrication method. The lubricant should be selected for the complete operating environment rather than on viscosity or price alone.<\/p>\n

              Conclusion: Why Are Lubricants Essential to Machinery?<\/h2>\n

              The purpose of lubricants in machinery extends far beyond simply making moving parts \u201cslippery.\u201d A well-selected machinery lubricant creates the conditions needed to control friction, minimize wear, manage heat, protect surfaces from corrosion, handle contaminants, and in certain systems transmit power. These functions directly influence machine reliability, energy efficiency, maintenance requirements, and service life. ASTM and ASM references both place friction and wear control at the center of lubrication science, while industrial lubrication practice expands that role to temperature, corrosion, contamination, and specialized machine functions.<\/p>\n

              The most important practical lesson is that lubrication quality depends on fit, not simply price or brand. The correct lubricant must match the machine’s load, speed, temperature, materials, clearances, contamination environment, and lubrication regime, and it must be stored, handled, applied, and monitored correctly.<\/p>\n

              For modern industrial equipment, lubrication should therefore be treated as part of a broader reliability strategy. When lubricant selection is combined with contamination control, appropriate application quantities, condition monitoring, and preventive or condition-based maintenance, the lubricant becomes an active component of machinery performance rather than just another maintenance consumable.<\/p>","protected":false},"excerpt":{"rendered":"

              Verstehen Sie den Zweck von Schmiermitteln in Maschinen, einschlie\u00dflich ihrer Funktionen zur Reduzierung von Reibung und Verschlei\u00df, zur W\u00e4rme\u00fcberwachung, zur Verhinderung von Korrosion, zur Steigerung der Effizienz und zur Verl\u00e4ngerung der Lebensdauer der Ger\u00e4te.<\/p>","protected":false},"author":1,"featured_media":1348,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[280,278,279],"class_list":["post-1347","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry-news","tag-china-machinery-lubricant","tag-machinery-lubricant","tag-machinery-lubricant-supplier"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.anoilnoil.com\/de\/wp-json\/wp\/v2\/posts\/1347","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.anoilnoil.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.anoilnoil.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.anoilnoil.com\/de\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.anoilnoil.com\/de\/wp-json\/wp\/v2\/comments?post=1347"}],"version-history":[{"count":0,"href":"https:\/\/www.anoilnoil.com\/de\/wp-json\/wp\/v2\/posts\/1347\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.anoilnoil.com\/de\/wp-json\/wp\/v2\/media\/1348"}],"wp:attachment":[{"href":"https:\/\/www.anoilnoil.com\/de\/wp-json\/wp\/v2\/media?parent=1347"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.anoilnoil.com\/de\/wp-json\/wp\/v2\/categories?post=1347"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.anoilnoil.com\/de\/wp-json\/wp\/v2\/tags?post=1347"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}