Browse Topic: Lubricating greases

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Grease, Aircraft, General Purpose, Low Temperature Range, Lithium ThickenedAMS3052B (Current)9/30/2025
Committee AMS-M is establishing an Industry Managed Qualification Program through the remit of the Performance Review Institute which requires this specification to be revised to reference the qualification process and controlling documentation.
AMS M Aerospace Greases Committee
Tribological evaluation of organic frictional composites filled with various nano- solid lubricants2021-28-025910/1/2021
Incorporation of organic fibers originate from plants in polymer composite is not new as they provide eco-friendly lighter composite and it have gained attention over a period of time because of the specific applications. The augmenting demanded by automotive sectors for wear and frictional areas where the conservation of energy is concerned is expected one with the addition of nano – solid lubricants. Our aim is to highlight the possibility of organic basalt fiber reinforced polymer composites along with three possible combination of nano – solid lubricants like graphite/graphene/ molybdenum disulfide was chosen and to fabricate tribo-materials through hot press technique. The outcome of the tribological tests (by varying load and sliding velocity) indicates that the responses of these three organic fiber based polymer composites have been effectively modified by nano-solid lubricants leading to significant enhancement as tribo materials is highlighted in higher level of load and
R, Soundararajan, Javid Firnas, Sait, Naveen raj, Nandakumar, pradeep s, sabapathy
Rotorcraft Lubrication Optimization through Grease Sampling and AnalysisF-0076-2020-1627410/5/2020
Rotorcraft, like most machines, require periodic lubrication tasks to ensure continued safe and reliable operation. Optimal lubrication intervals are desired to maintain system performance while minimizing aircraft downtime and maintenance labor. Boeing and AMRRI conducted a Lubrication Optimization Study (LOS) on the H-47 Chinook helicopter to establish the necessary engineering artifacts to define the grease lubrication intervals for selected Drive, Rotor, and Landing Gear components. Grease samples were collected from these components by H-47 operators from multiple nations and submitted for a laboratory analysis to characterize how wear, properties and contaminants change as time and aircraft hours accumulate. The LOS also revealed opportunities to further evaluate and leverage the data produced in this study, including determining superior performance of specific lubricants within the Mil-Spec designation, testing of greases for compatibility5 when mixed, and enhancing new grease
Singer, Tim, Johnson, Mike, Wurzbach, Richard
Lubricants for Oxygen UseAIR4071A (Current)7/14/2020
This SAE Aerospace Information Report (AIR) describes two classes of lubricants which, when properly applied, can be used in oxygen systems and components.
A-10 Aircraft Oxygen Equipment Committee
Petroleum Base Instrument Bearing Lubricant Viscosity 15AMS3055B (Current)11/4/2019
This specification covers the requirements for a refined paraffinic petroleum-base lubricant.
AMS B Finishes Processes and Fluids Committee
Plastic Bearings Redefine the WheelchairTBMG-345806/1/2019
For wheelchair users, the feeling of uneven ground can seem all too familiar. Determined to make ride discomfort a thing of the past, Israel-based SoftWheel has completely reinvented the wheel for a float-like experience.
Diagnostic Features from Aircraft Propulsion Bearings in Accelerated Aging ExperimentsF-0075-2019-146145/13/2019
Over the course of a long-duration aging of helicopter drivetrain bearings to examine the consumption of grease life, both vibration and acoustic emission sensing was used to monitor the bearing response as the grease life was consumed through this aging. Acoustic emission is evaluated against vibration in terms of signal trends over the course of the experiment. Common signal metrics are calculated to yield condition indicators, and machine learning techniques are applied to the vibration and acoustic emission data. For the 862 hour duration test run equivalent to over 6700 hours on wing, features of these signals trend with increased degree of aging. Autoencoders were used to enrich existing set of traditional condition indicators and principle component analysis was effectively used for feature fusion. This measured trending shows promise for future onboard Health and Usage Monitoring Systems which may adopt new sensing and data analysis modalities to trend the condition of
Dykas, Brian, Nenadic, Nenad, Hood, Adrian, Zhu, Edward
Increase Dental Implant Longevity with Bio-functional TiN and DLC CoatingsTBMG-3306410/1/2018
Artificial dental implants are the most reliable restoration option available for mature tooth loss. Despite their long potential lifespan, poor integration into the jaw and a slow healing process often create implant failure. Ensuring longevity requires adequate protection of the abutment-implant interface, protection achieved with surface functionalization by biocompatible coatings or advanced surface plasma treatments. The research summarized in this article examines the effect of using titanium nitride (TiN) and diamond-like carbon (DLC) thin-film coatings for implants.
Grease: Wide Temperature Range Lithium or Lithium Complex Thickened for Aircraft Wheel BearingsAMS3058A (Current)8/9/2018
This specification covers grease for use on aircraft wheel bearings. It also defines the quality control requirements to assure batch conformance and materials traceability, and the procedures to manage and communicate changes in the grease formulation and brand. This specification invokes the Performance Review Institute (PRI) product qualification process. Requests for submittal information may be made to the PRI at the address in 2.2, referencing this specification. Products qualified to this specification are listed on a Qualified Products List (QPL) managed by the PRI. Additional tests and evaluations may be required by individual equipment builders before a grease is approved for use in their equipment. Approval and/or certification for use of a specific grease in aero and aero-derived marine and industrial applications is the responsibility of the individual equipment builder and/or governmental authorities and is not implied by compliance with or qualification to this
AMS M Aerospace Greases Committee
Dynamic Particle Generation/Shedding in Lubricating Greases Used in Aerospace Applications01-11-02-00058/3/2018
The purpose of this study is to examine the phenomenon of Dynamic Particle Generation in lubricating greases that are used in a variety of critical Aerospace mechanisms. Particle Generation occurs in bearings, ball screws, and other mechanical devices where dynamic conditions are present. This should not be confused with outgassing as particle generation is unrelated to the pressure effects on a system. This is a critical factor in many systems as particle generation can contaminate systems or processes causing them to fail. These failures can lead to excessive costs, production failure, and equipment damage. In this study, several greases made from Multiplyalkylated Cyclopentane and Perfluoropolyether base fluids were tested to evaluate their particle generation properties. This particle generation phenomenon was studied using a custom test rig utilizing a high precision cleanroom ball-screw to simulate true application conditions. The ball-screw was tested at speeds from 200, 1,200
Galary, Jason T.
Grease, Aircraft, General Purpose, Low Temperature Range, Lithium ThickenedAMS3052A (Historical)5/16/2018
This specification covers grease for use within an aircraft. It also defines the quality control requirements to assure batch conformance and materials traceability, and the procedures to manage and communicate changes in the grease formulation and brand. This specification invokes the Performance Review Institute (PRI) product qualification process. Requests for submittal information may be made to the PRI at the address in 2.2, referencing this specification. Products qualified to this specification are listed on a Qualified Products List (QPL) managed by the PRI. Additional tests and evaluations may be required by individual equipment builders before a grease is approved for use in their equipment. Approval and/or certification for use of a specific grease in aero and aero-derived marine and industrial applications is the responsibility of the individual equipment builder and/or governmental authorities and is not implied by compliance with or qualification to this specification.
AMS M Aerospace Greases Committee
Specification for Aero and Aero-Derived Gas Turbine Engine LubricantsAS5780D (Current)3/4/2018
This specification defines basic physical, chemical, and performance limits for 5 cSt grades of gas turbine engine lubricating oils used in aero and aero-derived marine and industrial applications, along with standard test methods and requirements for laboratories performing them. It also defines the quality control requirements to assure batch conformance and materials traceability, and the procedures to manage and communicate changes in oil formulation and brand. This specification invokes the Performance Review Institute (PRI) product qualification process. Requests for submittal information may be made to the PRI at the address in Appendix D Section D.2, referencing this specification. Products qualified to this specification are listed on a Qualified Products List (QPL) managed by the PRI. Additional tests and evaluations may be required by individual equipment builders before an oil is approved for use in their equipment. Approval and/or certification for use of a specific gas
E-34 Propulsion Lubricants Committee
Lubricant, Instrument Bearing, Petroleum Base Viscosity 35AMS3056C (Current)11/28/2017
This specification covers the requirements for a refined paraffinic petroleum-base lubricant.
AMS B Finishes Processes and Fluids Committee
Lubricants, Industrial Oils, and Related Products Type H (Hydraulic Fluids) - SpecificationMS1004_201710 (Current)10/18/2017
See Table 1.
Fuel and Lubricants TC2 Industrial Lubricants
Self-Lubricating Hard Coatings for Extreme EnvironmentsTBMG-2768010/1/2017
NASA’ s space goals include a permanent presence on the Moon and an expedition to Mars. The success of habitats and vehicles on the Moon and Mars — and ultimately, of the human exploration of and permanent human presence on the Moon and Mars — is critically dependent on the correct and reliable operation of many moving mechanical assemblies. These harsh environments include severe dust, extreme cold and heat, and high vacuum, which make the use of liquid lubrication systems impractical. Potential threats common to both the Moon and Mars are low ambient temperatures, wide daily temperature swings (thermal cycling), solar flux, cosmic radiation, and large quantities of dust. The surface of Mars provides the additional challenges of dust storms, wind, and a carbon dioxide atmosphere. It is essential, therefore, to develop specialized mechanical components, such as bearings and gears, and to develop proper, long-life solid lubrication systems/coatings for each application.
Specification for Aero and Aero-Derived Gas Turbine Engine LubricantsAS5780C (Historical)8/4/2017
This specification defines basic physical, chemical, and performance limits for 5 cSt grades of gas turbine engine lubricating oils used in aero and aero-derived marine and industrial applications, along with standard test methods and requirements for laboratories performing them. It also defines the quality control requirements to assure batch conformance and materials traceability, and the procedures to manage and communicate changes in oil formulation and brand. This specification invokes the Performance Review Institute (PRI) product qualification process. Requests for submittal information may be made to the PRI at the address in Appendix D Section D.2, referencing this specification. Products qualified to this specification are listed on a Qualified Products List (QPL) managed by the PRI. Additional tests and evaluations may be required by individual equipment builders before an oil is approved for use in their equipment. Approval and/or certification for use of a specific gas
E-34 Propulsion Lubricants Committee
Solid Lubricant Assisted Machining -An Environmental Friendly Clean Technology to Improve the Surface Quality2017-28-19647/10/2017
Machining of materials has received significant consideration due to the increasing use of machining processes in various industrial applications. In machining, the heat generated in the cutting zone during machining is critical in deciding the work piece quality. Lubricants are widely used to reduce the heat generation. Their usage poses threat to environment and health hazards. Hence, there is a need to identify eco-friendly and user-friendly alternatives to conventional cutting fluids. Modern tribology has facilitated the use of solid lubricants such as graphite, calcium fluoride, molybdenum disulphide, and boric acid as an alternative to cutting fluids in machining. Solid lubricant assisted machining is an environmental friendly clean technology for improving the surface quality of the machined work piece. The present work investigates the role of solid lubricant assisted machining with graphite lubricants on surface quality while machining EN 8 steel .The performance of solid
Ramamoorthy, Rajaganesh, Venkatesan, T., Rajendran, R.
SKF Contributes to Climate Change Mitigation with Friction Optimized Wheel Bearings2016-01-19599/18/2016
Bearing friction is a direct contribution to vehicle CO2 emissions. The friction is defined as the total resistance to rotation, resulting from the combination of rolling and sliding friction in the contact areas. First, friction reduction was approached from a theoretical standpoint by employing modeling and simulation techniques. Improvements identified in simulation were then used to: create a new set of design rules for the internal geometry of the bearing, introduce a new grease, develop new seals, also with the integration of labyrinth functions and an optimization of the preload range variation. In order to provide a reliable confirmation of the expected achievements, a new friction measurement methodology was also introduced.
Sguotti, Laura, Olivieri, Davide, Bosco, Domenico
Lubricant, Solid Film Minimal OutgassingAMS3084C (Current)9/12/2016
This specification covers a solid film lubricant in the form of a ready-to-use, sprayable suspension.
AMS B Finishes Processes and Fluids Committee
Freedom from Lubrication Ensures a Clear ViewTBMG-2309110/1/2015
Slit lamp biomicrography is paramount to the practice of ophthalmology, allowing for an inside look at various areas of the eye with a range of magnification levels and light sources. The development of medical devices, such as the ophthalmologic slit lamp, brings about a number of design restrictions. The equipment must be able to perform the necessary tasks with precision to allow for patient diagnosis and proper treatment, and must maintain a high level of cleanliness, low levels of noise during operation, and, due to the typical high cost of medical equipment, have a high service life with as little required maintenance as possible. With these design requirements in mind, the development team from A.R.C. Laser GmbH, Nürnberg, Germany, was tasked with creating a new slit lamp for an already established marketplace.
NASA PS400 High-Temperature Solid Lubricant CoatingTBMG-228549/1/2015
NASA has an ongoing need for high-temperature solid lubricant coatings to reduce friction and wear in turbine engines, rocket engines, and other mechanical systems. Such lubricants must be thermally and chemically stable in air, vacuum, and reducing environments like hydrogen. Traditional lubricants like oil, grease, and PTFE (Polytetrafluoroethylene), and even more exotic solid lubricants like graphite and molybdenum disulphide, lack such capabilities. The key problem is to identify and formulate a material that possesses good mechanical properties, long-term environmental durability, and acceptable friction and wear-reducing characteristics while being practical to apply to bearings, seals, and other mechanical components.
How to Measure, Prevent, and Eliminate Stick-Slip and Noise Generation with Lubricants2015-01-22596/15/2015
Tribological contacts between plastic or polymer materials can exhibit stick-slip behaviour that generates noise. Tribological properties can be influenced by lubricants such as bonded coatings, greases, and fluids. In this paper, well known theories about polymer friction from the literature will be shown to be useful in the development of new lubricants. Theoretical results have been validated with a Ziegler Stick-Slip Test Rig. The test methods presented in this paper are used in the development of lubricants for automotive applications (in the interior of the car including invisible lubricants developed for Class “A” surfaces).
Zuleeg, Jan
Application of Near-field Acoustic Holography to Low Temperature Engine Start-up Noise Issue Resolution2015-01-16664/14/2015
An issue of engine squealing in low temperature range (around −25°C) right after start-up emerged for a significant number of vehicles in a vehicle program. The earlier effort had focused on typical common culprits such as the pulley-belt systems etc. However, much effort, by subjective listening and guestimating hardware replacement, yielded no fruitful results for more than a year. The application of near-field acoustic holography on top of the engine in a climate chamber quickly identified several noise source locations. Further noise source identification effort on top, front and left side of the engine pinpointed the top three noise source locations: the idler pulley and water pump on front, the air compressor on right side, and the air intake throttle on top. Then a series of experiments were subsequently conducted, leading to a conclusion that the idler pulley was the source of the issue. Finally, investigation of the pulley system confirmed that the insufficient lubricating
Li, Lingzhi, Yang, Yimin, Zhao, Fengjun, Zhang, Zhi, Cheng, Hailong, Hou, Hangsheng
BEARING, BALL, ANNULAR, PRIMARILY FOR AIRCRAFT GENERATORS AND MOTOR-GENERATORS, WIDE CARTRIDGE, TYPE IIAS17108B (Current)11/13/2014
ACBG Rolling Element Bearing Committee
BEARING, BALL, ANNULAR, PRIMARILY FOR AIRCRAFT GENERATORS AND MOTOR-GENERATORS, STANDARD LIGHT, TYPE IAS17107B (Current)11/13/2014
ACBG Rolling Element Bearing Committee
Tribological Characteristics of Yttria Stabilized Zirconia Nanolubricants2014-01-279010/13/2014
Nanolubricants are suspensions of nanoparticles in base fluids, a new challenge for thermal sciences provided by nanotechnology. The objective of this work is to analyze the thermal and tribological properties of yttria stabilized zirconia (YSZ) nanolubricants. Nanosized YSZ particles were prepared by milling YSZ (10μm) in a planetary ball mill equipped with vials using tungsten carbide balls. After 40 hrs, milled YSZ nanoparticles of sizes ranging from 70-90nm were obtained. The nanoparticles were characterized by Energy Dispersive X-ray analysis (EDXA), Scanning Electron microscope (SEM), Transmission Electron Microscope, Thermo Gravimetric-Differential Scanning Calorimeter and non contact 3D surface profilometer and the images of the same were obtained. The heat transfer properties of automotive engine lubricants were determined by utilization of measured thermal conductivity, viscosity index, density, flash point, fire point and pour point, which revealed that lubricants with
Ganapathy Pandian, Sakthinathan
The Effect of Grease on Brake Squeal2014-01-25129/28/2014
SAE J2521 noise tests are conducted to examine the impact of shim and grease on brake squeal generation. The impact of adhesive (bonded) shim, clip-on shim and grease for noise generation are examined. Low frequency squeal is eliminated by the application of grease on both adhesive (bonded) shims and clip-on shims. The role of shim and grease for reducing brake squeal is discussed. Adhesive (bonded) shims were found to be effective for high frequency squeal (pad bending mode) by increasing damping. Grease is effective for low frequency squeal (pad rigid mode). The mechanism to eliminate low frequency squeal by the application of grease is investigated. Friction between the shim and caliper piston/finger is reduced. Pads contact directly to the anchor bracket. As a result the contact stiffness is increased. The mechanism is confirmed by experiments.
Shimizu, Hidetoshi, Oura, Yasunori, Suzuki, Tatsuya, Sano, Yoshinori
Some Considerations on the Role of Third Bodies during Automotive Braking2014-01-24909/28/2014
Third bodies, also termed friction layers, tribofilms or secondary contact patches, are layers of more or less compacted wear debris between pads and rotor of a disc brake. Our approach of assessing the sliding behavior and friction properties induced by third bodies has been: i) structural characterization after AK-master test procedure, ii) sliding simulation of model structures similar to the observed ones but with simpler and well defined compositions, and iii) verification of simulation results by pin-on-disc tests with artificial third bodies showing the same microstructures and compositions as the model structures. The idea was to simulate structure formation during real braking conditions by high energy ball milling of appropriate powder blends. The final outcome of numerous parameter studies was that a third body containing 15 vol% soft ingredients and 0-20 vol % hard ingredients, both distributed homogeneously in a nanocrystalline iron oxide matrix, should be most desirable
Oesterle, Werner, Dmitriev, Andrey I.
Nanolubricant Oil Additives for Performance Improvement of the Intermediate Gearbox in the AH-64D HelicopterF-0070-2014-96295/20/2014
This paper presents a new nanolubricant for the intermediate gearbox of the Apache aircraft. Historically, the intermediate gearbox has been prone for grease leaking and this natural-occurring fault has negatively impacted the airworthiness of the aircraft. In this study, the incorporation of graphite nanoparticles in mobile aviation gear oil is presented as a nanofluid with excellent thermo-physical properties. Condition-based maintenance practices are demonstrated where four nanoparticle additive oil samples with different concentrations are tested in a full-scale tail rotor drive-train test stand, in addition to, a baseline sample for comparison purposes. Different condition monitoring results suggest the capacity of the nanofluids to have significant gearbox performance benefits when compared to the base oil.
Gouda, Kareem, Bayoumi, Abdel, Tarbutton, Joshua, McVay, Jacob
Dependence of Vibration Characteristics on Grease Service Levels in an AH-64D Intermediate GearboxF-0070-2014-96195/20/2014
The purpose of this experiment is to determine if the intermediate gearbox (IGB) grease service level can be characterized through existing condition-based maintenance (CBM) practices, which include vibration monitoring sensors and analysis algorithms, in the IGB of the AH-64D. A secondary objective is to quantify a common phenomenon in the gearbox–the expulsion of lubrication during different times of operation. If both goals are achieved then common maintenance practices on the aircraft can be changed to reduce workload. Three different gearboxes of similar condition were used for this experiment. Each gearbox was run in a two hour test under different loading conditions five separate times. In each iteration, the gearbox contained a different volume of grease that increased in 25% increments of the standard service level (0%, 25%, 50%, 75%, and 100%). The vibration data analyzed was collected through the modern signal processing unit (MSPU) to find a trend against the different
Patterson, Andrew, Edwards, Travis, Bayoumi, Abdel
Development of an Exhaust Driven Turbine-Generator Integrated Gas Energy Recovery System (TIGERS ® )2014-01-18734/1/2014
This paper describes the design and development steps taken to realise a functioning Turbo-generator Integrated Gas Energy Recovery System (TIGERS®). The main areas covered focus on simulation, machine design, control system development and validation. The mechanical design for this application is particularly challenging for a number of reasons. The turbine is capable of rotating the shaft at speeds greater than its critical rotating limit. Rolling element grease filled bearings are used to allow application flexibility; these have an operating temperature limit of 200°C. The exhaust gas can reach temperatures greater than 900°C in spark ignition applications, whereas the turbine upper functional limit is 850°C. The power electronics are integrally mounted in the machine and have a maximum thermal operating limit of 120°C. Considering that TIGERS is expected to harvest energy from the exhaust gas it is essential that it not only survives in this harsh environment, but it must also
Haughton, Andrew, Dickinson, Andy
Friction and Wear Reduction of Engine Bearings with Solid Lubricant Overlay2014-01-09554/1/2014
In recent years, engines equipped with idle reduction system for fuel saving have been increased in Europe and Japan. Because of the start-stop frequency increase, correspondingly crankshaft and engine bearing contacts also increase. The friction between shaft and bearing is significant to reduce fuel consumption, and besides it, engine bearing wear tends to increase. Therefore, lower friction with small wear engine bearings are expected. In this paper, new developed engine bearing with solid lubricant overlay and its frictional and wear properties are reported (1). As experimental result, a bearing with MoS2 solid lubricant contained polyamide-imide resin coated overlay proved 40% less coefficient of friction, 25% less starting torque and 65% less bearing wear against conventional aluminum alloy bimetal bearing without overlay under close to the start-stop lubrication conditions by testers. Also diesel engine bench test proved less FMEP.
Chitose, Toshiyuki, Kamiya, Shu, Kabeya, Yasunori, Desaki, Toru
Grease, Aircraft, General Purpose, Low Temperature Range, Lithium ThickenedAMS3052 (Historical)3/28/2013
This specification covers grease for use within an aircraft.
AMS M Aerospace Greases Committee
Grease: Wide Temperature Range Lithium or Lithium Complex Thickened for Aircraft Wheel BearingsAMS3058 (Historical)3/28/2013
This specification covers grease for use on aircraft wheel bearings.
AMS M Aerospace Greases Committee
Lubricants, Industrial Oils and Related Products - Type X (Greases) - SpecificationMS1011_201303 (Historical)3/5/2013
The greases have been classified according to the operating conditions under which they are used, because the versatile nature of greases makes it impractical to classify them according to end use. It will therefore be necessary to consult the supplier to be certain that the grease can be used in; for example, rolling bearings or pumped supply systems, and also concerning the compatibility of products (see Remarks in Table 1).
Fuel and Lubricants TC2 Industrial Lubricants
Specification for Aero and Aero-Derived Gas Turbine Engine LubricantsAS5780B (Historical)2/24/2013
This specification defines basic physical, chemical, and performance limits for 5 cSt grades of gas turbine engine lubricating oils used in aero and aero-derived marine and industrial applications, along with standard test methods and requirements for laboratories performing them. It also defines the quality control requirements to assure batch conformance and materials traceability, and the procedures to manage and communicate changes in oil formulation and brand. This specification invokes the Performance Review Institute (PRI) product qualification process. Requests for submittal information may be made to the PRI at the address in Appendix C, referencing this specification. Products qualified to this specification are listed on a Qualified Products List (QPL) managed by the PRI. Additional tests and evaluations may be required by individual equipment builders before an oil is approved for use in their equipment. Approval and/or certification for use of a specific gas turbine oil in
E-34 Propulsion Lubricants Committee
Grease, Plug Valve, Gasoline and Oil Resistant, NATO Code Number G-363, MetricAMSG6032A (Current)8/10/2012
This specification covers the requirements for two types of gasoline and oil resistant grease for lubrication of tapered plug valves, gaskets, and for other applications in fuel and oil systems. The type I grease is identified by NATO symbol G-363 (see 6.4).
AMS M Aerospace Greases Committee
Long-Life, Lightweight, Multi-Roller Traction Drives for Planetary Vehicle Surface ExplorationTBMG-135675/1/2012
NASA’s initiative for Lunar and Martian exploration will require long lived, robust drive systems for manned vehicles that must operate in hostile environments. The operation of these mechanical drives will pose a problem because of the existing extreme operating conditions. Some of these extreme conditions include operating at a very high or very cold temperature, operating over a wide range of temperatures, operating in very dusty environments, operating in a very high radiation environment, and operating in possibly corrosive environments.
A Study on Behavior of Dust Cover Under Low Temperature Environment2012-01-09734/16/2012
Several number of ball joints are used in the suspension system. For these ball joints, rubber dust covers are used in order to maintain sufficient lubrication and protect the ball joint from contaminants such as water and dusts. In recent years, the number of breakage or grease leakage of the dust cover used under ultralow temperature is increasing with the growth of automobile selling in developing countries. In this research, we have studied the mechanism of dust cover breakage under ultralow temperature by focusing on the low temperature behavior of a rubber material.
Hosen, Tatsuro, Yamabe, Tadahisa, Ito, Shin, Matsumoto, Naoki, Uchida, Kenichi, Ono, Shigeyuki
Low Friction Seal for Muddy Water with Textured Surface2012-01-08094/16/2012
This paper describes that the effect of surface texture of sealing lip on lubrication and sealing performance examined experimentally on practical aspect. Hub seals of PAC type were used in this study. A test apparatus and operating procedure were shown. The seal which had texture on the lip had lower frictional torque than plain one. The effect of friction reduction with the textured surface preserved up to 15 cycles, which was equivalent to a travel distance of 30,000 km. The textured surface 10 μmRz with grease on the lip kept sealing performance up to -0.10 MPa in static and dynamic conditions. The endurance time of sealing of the textured surface was almost the same as that of the plain surface in seal endurance test with muddy water.
Kato, Takuya, Yamane, Shohei, Kanzaki, Go, Munekata, Shinobu, Watanabe, Mitsuo, Mizuta, Hirotaka
Cartridges, Grease, 14 Ounce (for Cartridge-Type Grease Gun)AMSC22587A (Current)2/3/2012
This specification covers 14 ounce capacity grease cartridges. They are designed for use with cartridge-type grease guns conforming to MIL-G-3859.
AMS M Aerospace Greases Committee
Lubricant, Instrument Bearing, Petroleum Base Viscosity 35AMS3056B (Historical)10/3/2011
This specification covers the requirements for a refined paraffinic petroleum-base lubricant.
AMS B Finishes Processes and Fluids Committee
Motors Keep Telescope Operating in Record-Low Antarctic TemperaturesTBMG-96224/1/2011
At Concordia Station in Antarctica, there is a telescope mount that has been operating for a few years. Recently, there was a new record temperature at the Dome C site: -84.6 °C, or -199 °F. Not many things operate well in such conditions, but the telescope mount — which has to move continuously — used for scientific studies by the Laboratoire Universitaire d’Astrophysique de Nice (LUAN) is one of them.
Momentum, the Magazine for Student Members of SAE International 2010-10-0110MOMD093010/1/2010
Engineering a turnaround After months of financial turmoil and a scarcity of jobs, new engineers may finally be finding some relief about life after college. Do you have what it takes? When the stress of a school project becomes too much to handle, passion and determination can take you a long way. Bloodhound on the land speed record trail One thousand miles per hour is the ambitious target for Project Bloodhound SSC (super sonic car). A record run is planned for August 2011 at the Hakskeen Pan, in Northern Cape province, South Africa. Where the rubber meets the road and grease meets the fingernails Participants in SAE International's Collegiate Design Series (CDS) generally lack in one significant area: sleep.
High-Temperature Solid Lubricant CoatingTBMG-83048/1/2010
NASA PS400 is a solid lubricant coating invented for high-temperature tribological applications. This plasma-sprayed coating is a variant of the previously patented PS304 coating, and has been formulated to provide higher density, smoother surface finish, and better dimensional stability.
LUBRICANT, SOLID FILM Minimal OutgassingAMS3084B (Historical)3/5/2010
This specification covers a solid film lubricant in the form of a ready-to-use, sprayable suspension.
AMS B Finishes Processes and Fluids Committee
Application of Innovative PVD Coating to Stamping Dies for Processing Ultra-High Tensile Strength Steel Sheets2009-01-11704/20/2009
A novel nitride based coating system (BELCOAT-SS) was developed for the stamping dies for ultra high-tensile strength steel. It is characterized by an excellent wear resistance and low deposition temperature compare to the conventional diffusion coatings such as VC or TiC. High temperature wear test indicate that the wear rate of the new coating is 2 to 10 lower than conventional diffusion coatings. The result of stamping test using ultra-high tensile steel sheets indicate that life time of the die can be prolonged by the factor of at least 5 to 10 times.
Yamamoto, Kenji, Kujime, Susumu, Yasunaga, Tatsuya, Akari, Koichiro, Hosokawa, Yoshinobu, Takahara, Kazuki, Tonomura, Tsuyoshi, Yoshida, Junji
Lubrication Considerations for Military EquipmentTBMG-TB-00493012/1/2008
Proper lubrication of military equipment enhances performance and minimizes maintenance. Military equipment is subject to increasingly harsh environmental conditions and performance requirements. Simultaneously, engineers and equipment operators are demanding longer service life and less maintenance. The proper approach to lubrication is critical to minimizing equipment failures and meeting rigorous performance specifications. While a multitude of environmental and technical variables may affect lubricant selection and use, the following considerations are important to address whenever a new lubricant is selected:
Atomized BaF2-CaF2 for Better-Flowing Plasma-Spray FeedstockTBMG-26172/1/2008
Atomization of a molten mixture of BaF2 and CaF2 has been found to be superior to crushing of bulk solid BaF2- CaF2 as a means of producing eutectic BaF2-CaF2 powder for use as an ingredient of the powder feedstock of a hightemperature solid lubricant material known as PS304. Developed to reduce friction and wear in turbomachines that incorporate foil air bearings, PS304 is applied to metal substrates by plasma spraying. The constituents of PS304 are:
BEARING, BALL, ANNULAR, PRIMARILY FOR AIRCRAFT GENERATORS AND MOTOR-GENERATORS, WIDE CARTRIDGE, TYPE IIAS17108A (Historical)1/31/2008
ACBG Rolling Element Bearing Committee
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