Browse Topic: Lubricating greases

Items (819)

Performance Specification Anti-Seize Thread Compound, High Temperature

11/21/2024

This foundation specification (AMS3050) and its associated category specifications (AMS3050/1 through AMS3050/9) cover anti-seize compounds for use on threads of nuts, studs, bolts, and other mating surfaces, including those of superheated steam installations, at temperatures up to 1050 °F (566 °C). Compounds containing PTFE are limited to 600 °F (315 °C) maximum. Materials for nuts, studs, bolts, and other mating surfaces include, but are not limited to: steel, nickel alloys, stainless steel, and silver-coated materials. 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 2.3.3, 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

AMS M Aerospace Greases Committee

Supporting the Transportation Industry: Creating the GC-LB and High-Performance Multiuse (HPM) Grease Certification Programs

2023-01-1652

10/31/2023

This paper outlines the history and background of the NLGI (formerly known as the National Lubricating Grease Institute) lubricating grease specifications, GC-LB classification of Automotive Service Greases as well as details on the development of new requirements for their High-Performance Multiuse (HPM) grease certification program. The performance of commercial lubricating grease formulations through NLGI's Certification Mark using the GC-LB Classification system and the recently introduced HPM grease certification program will be discussed. These certification programs have provided an internationally recognized specification for lubricating grease and automotive manufacturers, users and consumers since 1989. Although originally conceived as a specification for greases for the re-lubrication of automotive chassis and wheel bearings, GC-LB is today recognized as a mark of quality for a variety of different applications. The main driving force to upgrade GC-LB was that six of the 12

Kaperick, Joseph, Fish, Dr Gareth, Coe, Chuck, Cosgrove, Bradley, Turner, David, Mackwood, Wayne, Mistry, Kuldeep, Chichester, Chad, Dudley, Gary, Morris, Dwaine, Brandon, Keyth, Kunselman, Michael

Low Temperature Performance of Novel Electric Vehicle Motor Lubricating Greases

2023-01-1653

10/31/2023

In this study the main focus is on the low temperature behavior and mobility of lubricating greases; a characteristic that has always been challenging for grease formulators. A series of lab-scale polyurea grease samples are prepared, with three different types of low viscosity synthetic base oils (ISO VG 32), and are examined in terms of their low temperature behavior as potential lubricants for electric motor bearings of electric vehicles (EVs) and hybrid electric vehicles (HEVs). The cold flow properties are analyzed by utilizing a Low Temperature Flow Tester following the DIN 51805-2 (Determination of flow pressure of lubricating greases according to Kesternich method) standard. The test matrix includes the cold flow pressure assessment at various temperatures ranging from -0oC to -40oC, whereas those measurements are also repeated after various relaxation periods - at selected temperatures - from 4h up to 8h before the actual determination. By employing this modified technique

Dodos, George S., Shah, Rajesh

Analysis and Control of Gear Rattle Noise for E-Axle

2023-01-7019

10/30/2023

As the main power form of new energy vehicles, e-axle systems are has been widely used in passenger vehicles and commercial vehicles. A passenger car equipped with an e-axle, in constant speed and low torque conditions, there is a noticeable rattle noise, through experimental investigation and comparative analysis, it is confirmed that the connection spline of motor and reducer is the main influencing factor. Then, Through the qualitative analysis of simulation, it is found that both spline clearance and misalignment have an amplification effect on the motor speed, thereby stimulating the gear pair of the reducer to produce rattle. The amplification effect of spline clearance is stronger than that of spline misalignment. Therefore, improving the stiffness and application amount of lubricating grease while controlling the spline sample to meet the design requirements can effectively solve the problem of rattle, improve the accuracy of spline alignment, and significantly reduce the

Wang, Dong, Zhang, Wei, Yang, Zhengrui

Friction Prediction Method for Engine Bearings using EHD Analysis Considering Modified Friction Coefficient and Running-in depending on Lubrication Conditions

2023-32-0162

09/29/2023

Friction reduction is one of the effective means to improve the thermal efficiency of internal combustion engine (ICE). In development of journal bearings, Model Based Development (MBD) is incorporated to study design considered the influence of the surrounding structure. However, the prediction accuracy of friction in journal bearings for engines under mixed lubrication is not sufficient. Therefore, the modified friction coefficient was introduced into the friction prediction model and running-in progression was considered. To introduce the modified friction coefficient, the parameters for aluminum alloy bearing and solid lubricant overlay bearing were identified based on the results of rig tests. As a validation, the results were compared with the engine friction tests in firing condition, and the results were in good agreement

Kurabe, Yohei, Suzuki, Yuna, Kajiki, Yuichiro

Greases for powertrains: thickener effect, electric conductivity, and life cycle assessment

2023-32-0146

09/29/2023

The paper shows how grease thickener polarity affects performance of the typical powertrain components: gears and rolling element bearings. Greases based on a non-polar polypropylene thickener reduce friction losses (more than 20%) in high-speed deep groove ball bearings and provide a longer service life (more than 2 times) in highly loaded bevel gears, compared to the greases based on polar lithium thickeners. The electrification and sustainability trends have led to additional requirements to be addresses during grease design process: tunable electric conductivity and reduced environment footprint. The grease design challenges caused by the novel requirements and potential solutions are discussed

Glavatskih, Sergei, Leckner, Johan

Experimental Analysis and Modelling of Solid Lubricant Coating on Mild Steel Using EDC

2022-28-0553

12/23/2022

This study reports a simulation model to predict the coating thickness during the Electric Discharge Coating (EDC) process and validates it with experimental analysis. Solid lubricant coating was developed on the mild steel substrate using WS2, and Cu (50:50) based green compact electrodes. The simulation model developed by using COMSOL Multiphysics (5.5) software and the accumulated growth height from the heavy species transport calculated as coating thickness. Experiments with the same input parameters and coating thickness were measured, compared with simulation result and the results show with error fraction of 3% to 12%. Therefore, the present developed simulation model can be employed to predict the thickness of solid lubricant coating by EDC process with minimum error

V, Kumaran, B, Muralidharan

A Study on the Performance of Lubricating Greases for Electric and Hybrid Vehicle Applications

2022-01-1105

08/30/2022

The automotive sector has always been closely connected with the lubricants industry, with the latter continuously developing new technologies, specs and products in order to address the evolution in this segment. Electrification represents a significant change in the major powertrains and, thus, it will inevitably affect the selection, development and market share of several types of lubricants, such as lubricating greases. The evolution of the EV/HV segment will increase the demand and the importance of lubricating greases for electric motors. New challenges for grease formulation may arise from the neighboring electric currents and electromagnetic fields and higher energy efficiency requirements. In this paper, the perspectives and the projected evolution of automotive e-mobility is reported and the subsequent influence on the main grease performance requirements are analyzed. Moreover, the alteration in the applications are examined. A series of lubricating grease formulations are

Dodos, George S.

Declarable Substances Recommended Practice

ARP9536A (Current)

08/05/2022

This standard applies to the aerospace and defense industries and their supply chain

E-1 Environmental Committee

Techniques for Suspect/Counterfeit EEE Parts Detection by Thermogravimetric Analysis (TGA) Test Methods

AS6171/10 (Current)06/28/2022

This test method provides the capabilities, limitations, and suggested possible applications of TGA as it pertains to the detection of counterfeit electronic components. Additionally, this document outlines requirements associated with the application of TGA including: equipment requirements, test sample requirements, methodology, control and calibration, data analysis, reporting, and qualification and certification. If AS6171/10 is invoked in the contract, the base document, AS6171 General Requirements shall also apply

G-19A Test Laboratory Standards Development Committee

BEARING, ROLLER, ANTIFRICTION, ROD END, EXTERNAL THREAD, SELF-ALIGNING, AIR FRAME, -67 °F TO 350 °F TYPE 1, HEAVY DUTY, SEALED

AS21429C (Current)

12/13/2021

ACBG Rolling Element Bearing Committee

Lubrication Fittings

J534_202110 (Current)

10/06/2021

This SAE Standard covers complete general and dimensional specifications for the various types of lubrication fittings and related threaded components intended for general application in the automotive and allied fields

Hydraulic Tube Fittings Committee

‘Retuning’ lubricants FOR EV DUTY

21AUTP10_0410/01/2021

Lubrizol's top grease expert talks about how the electric vehicle trend is driving innovations and creating opportunities. “My focus is lubricating grease; I've been doing it for 32 years,” explained Dr. Gareth Fish with a high degree of pride. Lubrizol's top expert on the subject. Globally recognized in the lubricants field, Dr. Fish has authored more than 70 technical papers on grease and tribology and has four U.S. patents. He finds the industry's shift to electrified vehicles and its impact on automotive greases “an extremely interesting and challenging time.” Broad challenges include strategic supply - the lubricants industry competes with the battery industry for lithium - and sustainability by reducing grease's environmental footprint, Dr. Fish noted. Removing the internal combustion engine and its ancillary systems from vehicles is an obvious trend with major impact; Lubrizol provides the industry with significant technology development and R&D support. “Today we have 50-60

Brooke, Lindsay

Elastomer Compatibility Considerations Relative to Elastomer Selection

AIR786C (Current)

10/01/2021

This SAE Aerospace Information Report (AIR) contains data relative to the chemical nature of aerospace fluids and relates each to its empirical effect upon elastomeric components. Since the compatibilities of elastomers are determined by the compounding as well as the nature of the base polymer, the elastomers considered are limited to finished compounds for which material or performance specifications can be referenced

A-6C2 Seals Committee

Tribological Evaluation of Organic Frictional Composites Filled with Various Nano-Solid Lubricants

2021-28-025910/01/2021

Incorporating of organic fibers originated from plants in polymer composite have gained significant attention over a period of time as they provide eco-friendly lighter composites. The increasing demand by automotive sectors for wear and frictional areas where the conservation of energy is concerned is expected with addition of nano -solid lubricants. Our aim is to fabricate organic frictional composites of basalt fiber reinforced polymer composites along with three possible combination of nano - solid lubricants like (1) graphite (2) graphene (3) molybdenum disulfide through hot press technique. The outcome of the tribological tests (by varying load and sliding velocity) indicates that these three-organic fiber-based polymer composites have been effectively modified by nano-solid lubricants leading to significant enhancement. In which molybdenum disulfide- based brake pad material is an attractive material to replace the practical problems in automotive sector was the key finding

R, Soundararajan, Javid Firnas, Sait, Naveen raj, Nandakumar, pradeep s, sabapathy

A Unique Methodology to Evaluate the Metallic Noise Concern of a Dual-Mass Flywheel in Real-World Usage Conditions

2021-28-0249

10/01/2021

Dual mass flywheel (DMF) is an excellent solution to improve the noise, vibration, and harshness (NVH) characteristic of any vehicle by isolating the driveline from the engine torsional vibrations. For the same reason, DMF’s are widely used in high power-density diesel and gasoline engines. However, the real-world usage conditions pose a lot of challenges to the robustness of the DMF. In the present work, by capturing the Real-World Usage Profile (RWUP) conditions, a new methodology is developed to evaluate the robustness of a DMF fitted in a Sports utility vehicle (SUV). Ventilation holes are provided on clutch housing to improve convective heat transfer. Improvement in convective heat transfer will increase the life and will reduce clutch burning concerns. Cities like Mumbai, Chennai, Bangalore, roads will have clogged waters during rainy season. When the vehicle was driven in such roads, water enters inside the clutch housing through ventilation holes. Prolonged usage of vehicle in

S, Kesavprasad, M, Sudhan, Vijayarangan, Deepak, Rai, Vikas

Lubricants, Industrial Oils, and Related Products, Type M (Metal Removal Fluids) - Specification

MS1008_202106 (Current)

06/22/2021

See Tables 1A and 1B

Fuel and Lubricants TC2 Industrial Lubricants

Studies on Correlation of Grease Life between Shielded and Unshielded Conditions in Rolling Element Bearings

2021-28-0004

03/08/2021

It has been reported that 90% of greases are used for the lubrication of rolling element bearings. Greases are important systemic components which greatly influence the life of the bearings besides the dynamic test conditions encountered throughout its operation such as load, speed, temperature and bearing design. The greases may be used in bearings running in open condition or using shields to prevent it being leaked or thrown off during operation. The dynamic life of grease is determined by tests run on multiple sets at elevated temperatures till failure is encountered. These tests measure the grease life as well as the bearing life. Simulated tests in conditions close to real life applications are possible using this method. The FE9 test rig is one of the commonly used test rigs for finding the dynamic grease life. In this paper, grease candidates with differing composition were evaluated at different elevated temperatures in the open and shielded conditions to attempt to find out

Meshram, Rahul, Mayeen, Hafiz, Pokhriyal, Naveen Kumar, Mahapatra, Rajendra, Harinarain, Ajay, Bansal, Veena, Saxena, Deepak

BEARING, ROLLER, SELF-ALIGNING, DOUBLE ROW, AIRFRAME, ANTI-FRICTION, SEALED, TYPE III

AS28914C (Current)

11/10/2020

ACBG Rolling Element Bearing Committee

BEARING, ROLLER, SELF-ALIGNING, DOUBLE ROW, AIRFRAME, ANTI-FRICTION, SEALED, TYPE II

AS28913C (Current)

11/10/2020

ACBG Rolling Element Bearing Committee

Effective Grease Academy Training for Optimized Wheel Bearing Lubrication

1277711/03/2020

Grease is a three component matrix consisting of a thickener, base oil and additives. It is really critical to understand grease know how and technology for providing optimized lubrication solutions for many applications. This is no exception especially when the auto industry and the OEMs are striving towards development and making of energy efficient workable components such as wheel bearings and associated units. This academy will address key notes worthy of review and consideration in terms of grease terminology and associated parameters as a source of knowledge that can be used with engineers for a holistic and sustained solution for wheel bearing lubrication

Anuj, Mistry

Tribological Properties Evaluation of Newly Developed Friction Material for Automotive Disc Brake Pad

2020-28-0511

09/25/2020

The present work aims at investigating the tribological behavior of a newly developed friction materials and its performance is compared with the commercial brake pad under dry sliding conditions. The friction materials were made in the form of cylindrical pin from three different solid lubricants - graphite, molybdenum disulfide (MoS2) and graphene - keeping the other ingredients fixed. The prepared seven samples (BP01- Graphite, BP02- MoS2, BP03- Graphite &MoS2, BP04- Graphene, BP05- Graphene & Graphite, BP06 - Graphene & MoS2, BP07 - Graphene, Graphite & MoS2) were tested in pin and disc machine and compared to investigate the coefficient of friction, wear resistance followed by hardness test and thermal degradation analysis. The results showed that the wear loss and coefficient of friction of the developed friction materials were strongly influenced by the type and percentage of solid lubricants. The performance of the newly developed friction materials is better than the

Natarajan, Ravikumar, Rajendran, R, ARASAN PhD, T R TAMIL, PANDURANGAN, RANJITH

Lubricants for Oxygen Use

AIR4071A (Current)

07/14/2020

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

Automotive Lubricating Greases

J310_202005 (Current)

05/12/2020

This SAE Recommended Practice was developed by SAE, and the section “Standard Classification and Specification for Service Greases” cooperatively with ASTM and NLGI. It is intended to assist those concerned with the design of automotive components, and with the selection and marketing of greases for the lubrication of certain of those components on passenger cars, trucks, and buses. The information contained herein will be helpful in understanding the terms related to properties, designations, and service applications of automotive greases

Fuels and Lubricants TC 3 Driveline and Chassis Lubrication