Browse Topic: Bearings

Items (1,139)
Find
BALL BEARINGS.06000204/23/2025
HESS, HENRY
A UNIVERSAL STEERING GROMMET DESIGN APPROACH TO ENHANCE THE PASSENGER CABIN NVH PERFORMANCE2024-26-020201/16/2024
As a car OEM, we continuously strive to set the bar for competitors with every product. Consumer travel experiences are enhanced by increasing passenger cabin silence. There is only one steering system opening in the firewall panel, which is used for allowing intermediate shaft's fitment on the pinion shaft of the steering gear. The steering grommet is the sole component that covers the firewall cut-out without disrupting steering operations, which has a substantial impact on the NVH performance of the vehicle. It is typically used in cars to eliminate engine noise and dust entering to passenger compartment. The part is assembled inside the vehicle where the steering intermediate shaft passing through BIW firewall panel. We use a bearing, plastic bush, or direct rubber interference design in the steering grommet to accommodate the rotational input the driver provides to turn the automobile. However, occasionally noise may be produced due to uneven bearing or plastic bush loading or a
J, Sadhish, Vijayarangan, Deepak
OPTIMIZATION OF OIL QUANTITY IN MANUAL TRANSMISSION AND REDUCING CHURNING LOSS2024-26-034601/16/2024
Gearbox efficiency losses are contributed by Oil seal rubbing, Synchro friction rubbing, Gear losses, bearing preload friction, windage losses, churning losses etc. Here in this experiment we have focused on quantifying and reducing the churning losses as well as verifying the lubrication requirements satisfactorily in all terrains and conditions. The paper establishes the effective way for evaluating same with over 80 trials conducted for conclusive proof. Gearboxes must work efficiently to get the job done properly and lubrication is vital to this efficiency. Lubricating oil is like the circulation system of a gearbox. If the oil levels fall too low, the gearbox will likely fail. Gearbox failure can lead to expensive repairs that could be prevented. Besides added costs due to replacement or repair, costs associated with a loss of production could be significant. These issues are why it is important to understand the consequences of having low lubricant levels. Similarly, higher oil
Lakshamanan, sundar
NVH improvement of the BEV transmission by altering bearing mounting arrangement.2025-01-010405/05/2023
As per metaphor, “The squeaky wheel gets the grease” the transmission of battery electric vehicle (BEVs) gets topmost attention in terms of NVH improvement. While the engine is getting replaced with an almost silent electric motor, the transmission noise appears persistent and demands more silent transmission. This has raised demand for improvement in design as well as manufacturing quality. Various innovations are being done to drive an improvement in the NVH. Following paper will discuss the improvement in NVH achieved through a design innovation in the way bearings are installed and demonstrated a significant amount of improvement. We have used SMT MASTA used as a simulation tool to predict the expected results and a Transmission Dyno test bench in an anechoic chamber to test the NVH performance on physical sample. The innovation was done on a small single speed two stage reduction gearbox coupled with a 100 NM, 14000 RPM battery electric motor. Though the bearings have
Pingale, Abhijeet, Soni, Jaldeep
testing mobilityRxiv application by test1auto testSAE-PP-0673809/02/2022
testing mobilityRxiv application by test1
Mutagaana, Festo
Performance Analysis of Hydrodynamic Journal Bearing Under different Operating Conditions 2022-01-038403/29/2022
Study of vibration, temperature and pressure generation during the running of the engineering application has an important role in designing them, especially working at high speed and high load conditions. A significant portion of research and development today is concentrated on saving energy by reducing friction. In the present discussed the measurement and analysis of the vibration, temperature and pressure generation during the running of the journal bearing. The experiments were performed during the hydrodynamic lubrication regime using SAE 15W-30 lubricating oil. A journal bearing having journal diameter as 22 mm, length/diameter ratio 1 and 0.027 mm radial clearance has been designed and used to test the output responses. Analysis of starting friction and average friction torque during the running of journal bearing was done at 1400, 1600, 1800, and 2000 revolution per minute (rpm) speed of the journal at load value 750 N. The variation of vibration, temperature and with
Sharma, Vipin Kumar, Singh, Ramesh
Evaluation of Fretting Phenomenon in Gearbox and Allied Failures2022-01-078503/29/2022
This paper takes a review of fretting phenomenon on splines of the engaging gears and corresponding splines on shaft of automotive transmission and how it leads to failure of other components in the gearbox. Fretting is a special wear process which occurs at the contact area of two mating metal surfaces when subject to minute relative oscillating motion under vibration. In automotive gearbox, which is subjected to torsional vibrations of the powertrain, the splines of engaging gears and corresponding shaft may experience fretting, especially when the subject gear pair is not engaged. The wear debris formed under fretting process when oxidizes becomes very hard and more abrasive than base metal. These oxidized wear particles when comes in mesh contact with nearby components like bearings, gears etc. may damage these parts during operation and eventually lead to failure. In this paper, a case study is presented wherein fretting has been identified as the root cause of failures of some
Mohire, Sujit, Bhandari, Kiran Kamlakar, Tendulkar, Vishveshvar, Chatterjee, Soumik
Lightweight differential case material and bearing optimization in electric car transmission2022-01-078703/29/2022
This paper presents about idea developed in electric car transmission for transverse application and a torque capacity of 200 Nm to 360 Nm. How current differential case support bearing type is changed with added advantage is discussed. Further, in this paper, effect of change in bearing type is discussed. Detailed study on the effect of change in bearing type is done and also bearing stress and life calculations are computed. Further how current differential case material is changed with added advantage is discussed. Detailed analysis of differential case is done to arrive at feasible lightweight conclusion. Our proposed research methodology is expected to be useful in reducing mass and without reducing desired product life.
Bhat, Muralidhar Suryanarayan
Whirl Analysis of an Overhung Disk Shaft System Mounted on Non-rigid Bearings2022-01-073203/29/2022
Eigenvalues of a simple rotating flexible disk-shaft system are obtained using different methods. The shaft is supported radially by non-rigid bearings, while the disk is situated at one end of the shaft. Eigenvalues from a finite element and a multi-body dynamic tool are compared against an established analytical formulation. The Campbell diagram based on natural frequencies obtained from the tools differ from the analytical values because of oversimplification in the analytical model. Later, detailed whirl analysis is performed using AVL Excite multi-body tool that includes understanding forward and reverse whirls in absolute and relative coordinate systems and their relationships. Responses to periodic force and base excitations at a constant rotational speed of the shaft are obtained and a modified Campbell diagram based on this is developed. Whirl of the center of the disk is plotted as an orbital or phase plot and its rotational direction noted. Finally, based on the above plots
Chowdhury, Sanjib, Joshi, Yashodhan
Effect of Decoration on Windshield Impact Resistance and Novel Decoration Solution Compatible with Chemical Strengthening2022-01-030403/29/2022
Ball bearing impact tests were performed to evaluate impact resistance of laminates with different decoration configurations. Test results showed that laminates made with enamel decorative frit only on Surface 4, significantly outperformed laminates that had enamel on Surface 2. Furthermore, it was found that hybrid laminates, consisting of a standard annealed outer-ply and a thin, chemically strengthened inner-ply with a specially formulated decorative frit which is compatible with the ion-exchange chemical strengthening process, resulted in impact resistance levels that were three times greater than conventional laminates. Details follow.
Cleary, Thomas, Huten, Timothy, Lehuede, Philippe, Joubaud, Laurent, Friske, Mark
Gland Design, O-Ring and Other SealsAS4716D (Current)11/09/2021
This SAE Aerospace Standard (AS) provides standardized gland (groove) design criteria and dimensions for O-ring seal glands for static and dynamic applications, and other seals.
A-6C2 Seals Committee
Gland Design, O-Ring and Other SealsAS4716D-TEST-REC (Historical)11/09/2021
This SAE Aerospace Standard (AS) provides standardized gland (groove) design criteria and dimensions for O-ring seal glands for static and dynamic applications, and other seals.
A-6C2 Seals Committee
BEARING, ROLLER, NEEDLE, TRACK ROLLER INTEGRAL STUD, SEALED, TYPE VIII ANTIFRICTION, INCHAS21440C (Current)10/06/2021
ACBG Rolling Element Bearing Committee
Fault diagnosis of ball bearings using machine learning of vibration signals2021-28-017810/01/2021
One of the major reasons for the failure of rotating machines are rolling element bearing defects. Failure of bearings leads to unplanned maintenance shutdowns and unsafe working conditions. For these reasons, it is very important to detect and identify the defects in rolling element bearings in its early stage. Vibration signals are well known for monitoring the conditions of rotating machineries. The performance of conventional intelligent fault diagnosis methods depends on feature extraction of vibration signals, which requires signal processing techniques, good proficiency, and human expertise. Recently, deep learning algorithms have been applied widely in machine health monitoring. Here in this study, a machine learning based model for the detection of bearing defects is analysed. The bearings used for this analysis is 6305 deep groove ball bearing. Defects like ball defect, outer race defect, and inner race defect were considered. A motor driven variable speed test rig rotor
Poulose, Jasmine, prasad SR, Vishnu, Sadique, Anwar
Regulatory Norms and effect on transmission component validation2021-26-046009/22/2021
With the advent of BS VI regulations, automotive manufacturers are required to innovate the powertrains, fuel systems, exhaust and its after treatment systems to meet the regulatory requirements. The exhaust regulations can be met either by reducing the exhaust gases being generated by the engine (attacking the source) or by treating the exhaust gases in after treatment devices. The choice of the opted system varies with the manufacturer. The after-treatment devices such as catalytic converters are generally mounted in the engine compartment to take advantage of high temperature of exhaust gases to yield the reactions. Such an arrangement imposes a lot of thermal load on the peripheral components such as gearshift cables, bearings, oil seals, driveshafts etc. Thermal shields or thermal sleeve are used to address thermal issue and to protect transmission components. System level validation test requirement of transmission need to be re-visited to considering change in environmental
Tongaonkar, Yogesh Manohar, Patel, Hiral, Tendulkar, Vishveshvar, Bhosale, Vikas, halingale, Amol
Development of a Novel Dynamically Loaded Journal Bearing Test Rig2021-01-121809/21/2021
In this work, a dynamically loaded hydrodynamic journal bearing test rig is developed and introduced. The rig is a novel design, using a hydraulic actuator with fast acting spool valves to apply load to a connecting rod. This force is transmitted through the connecting rod to the large end bearing which is mounted on a spinning shaft, simulating a crankshaft journal. The hydraulic actuator allows for fully variable load control and can be used to apply either static load in compression and tension or dynamic loading to simulate engine operation. A variable speed electric motor controls shaft speed and is synchronized to the hydraulic actuator motion to accurately simulate loading from each stroke in a four-stroke cycle. In addition to these dynamically loaded cycles, the journal bearing rig is also capable of controlled static loading. This static loading is used to simulate stop/start engine operation. A high precision torque meter enables direct measurements of journal bearing
Michlberger, Alexander, Bachu, Pruthvi, Bitsis, Daniel Christopher
Using Fourier Analysis and Theoretical Equation to Predict Bearing Raceway Waviness2021-01-103608/31/2021
Large size bearing’s raceway waviness is a most common NVH issue that presenting in manufactured bearing. Unlike small or medium size bearing with its raceway been honed after grinding. Typically, for large size bearing’s raceway are not honed due to its size limitation, unless there are special requirements from customers. Hence, it will inevitably generate great number of waves on the raceway circumference, which lead to a significant source excitation to the system. Although great amount of experiments substantiated that bearing waviness will not affect bearing life. However, annoyance noise is the main reason that customer reject bearings for quality concern. Hence, at the early stage of identifying raceway waviness issue at customer site could prevent from economic loss. Generally, the energy level caused by large size bearing waviness could be distinctive. Testing engineer will capture time domain vibration data by using radial accelerometer cells mounted on the housing for
Chen, George (Huangxing), Dalen, Piet Van, Nijen, Gerrit Van, Wu, Zhengjiang
SAE TOMORROW TODAY: Bear Flag Robotics, Helping Farmers Improve Sustainability1300804/06/2021
Sustainable farming is within reach and Bear Flag Robotics is part of the collage of technology that's making it happen. On the latest episode, we spoke with Igino Cafiero and Aubrey Donnellan, Founders of Bear Flag Robotics, to discuss how the unique business model enables business and farming success. From their days at Carnegie Mellon to the present, the unique perspectives of Cafiero and Donnellan have helped build the Bear Flag Robotics business on diversity of thought, transparency and trust. Discover how they bring these same ideals to business relationships with farmers and how Bear Flag's technology plays a role in safety, productivity and sustainability.
Hineman, Marcie
BEARING, BALL, AIRFRAME, ANTI-FRICTION, EXTRA WIDE, DOUBLE ROW, INTERMEDIATE DUTYAS27647E (Historical)01/12/2021
ACBG Rolling Element Bearing Committee
BEARING, BALL, AIRFRAME, ANTI-FRICTION, EXTRA WIDE, DOUBLE ROW, INTERMEDIATE DUTYAS27647E-TEST-REC (Historical)01/12/2021
ACBG Rolling Element Bearing Committee
Nuts, Self-Locking, Steel High Strength, All Metal 450 °F Use, UN and UNJ Thread FormAS7252A (Current)11/11/2020
This specification covers all metal, self-locking wrenching nuts, plate nuts, shank nuts, and gang channel nuts made of a carbon or low alloy steel.
E-25 General Standards for Aerospace and Propulsion Systems
A Full-System Approach to Maximize Energy Efficiency of a Wheel Bearing2020-01-163110/05/2020
Environmental sustainability is morphing Automotive technical development strategies and driving the evolution of vehicles with a speed and a strength hardly foreseeable a decade ago. The entire vehicle architecture is impacted, and energy efficiency becomes one of the most important parameters to reach goals, which are now not only market demands, but also based on regulatory standards with penalty consequences. Therefore, rolling drag from all bearings in multiple rotating parts of the vehicle needs to be reduced; wheel bearings are among the biggest in size regardless of the powertrain architecture (ICE, Hybrid, BEV) and have a significant impact. The design of wheel bearings is a complex balance between features influencing durability, robustness, vehicle dynamics, and, of course, energy efficiency. Whereas the driving efficiency and durability have always been main drivers for wheel hub designs, the upcoming development of BEVs, which use large battery packs, has introduced
Re, Paolo, Lamboglia, Francesco, Missiaggia, Giorgio
Transitioning from IC Engine to Electric Vehicle: An Optimized Wheel End Solution2020-01-163210/05/2020
This paper discusses the change in vehicle parameters when moving from a conventional internal combustion engine (ICE) to an electric motor. In particular, the paper discusses the impact on the wheel end bearings, which must handle higher GAWRs (gross axle weight ratings) at lower center of gravity heights on electric vehicles. These changes require bearings to handle higher loads. Typically, larger loads increase the bearing size and with it, the mounting interface dimensions for auxiliary components. In this paper, The Timken Company demonstrates an alternative bearing design that can handle higher electric vehicle GAWRs but allows for continuity in the surrounding brake corner components - potentially saving OEMs significant design costs and delays. This solution focuses on the mid- and large-size SUV market where bearing capacity could be a limiting factor for electric vehicle variants - driving significant wheel end brake corner design changes to accommodate the larger bearings
Fernandes, Ryan, Parsons, Elizabeth, Gromosiak, Mike
Providing of Sliding Bearings Reliability of Transmissions Gear Wheels of Transport Cars by Optimization of Assembly Tolerances2020-01-223909/15/2020
In the design of gearboxes and transfer boxes of heavy-duty vehicle`s transmissions, sliding bearings are often used as supports for gear wheels. Analysis of the results of statistical processing of gearbox parts failures and transfer boxes of wheeled tractors with a pulling force of 30 kN indicates the need to improve the reliability of the sliding bearings of the gear wheels. Such plain bearings ensure free rotation of the gear wheels in case of the torque transmission absence, and when locked by a clutch, the radial load of the gear wheel is sensed, while operating in the slipping rolling mode. Such units are poorly understood and in the technical literature sources there are no recommendations for their engineering, which often leads to errors when selecting operation gaps and press fitted in gear wheels. The manufacturers of the transmissions assemblies replaced the plain bearings, which in this case are made of metal-ceramic bushes, for roller bearings. Also, the application of
Savchuk, Volodymyr, Kuhtov, Valeriy, Gritsuk, Igor V., Podrigalo, Mikhail, Vychuzhanin, Vladimir, Parsadanov, Igor, Bulgakov, Nickolay, Belousov, Evgen, Vrublevskyi, Roman, Samarin, Oleksandr, Kurnosenko, Daria, Verbovskiy, Valeriy
Balancing Machines - Verification Test RequirementsAS8617-TEST-REC (Historical)08/25/2020
This document specifies instructions to verify proper calibration of all balancing machines used for processing gas turbine rotors. Detailed test procedures and test log samples are provided to evaluate the condition of the machine under test. These performance and test requirements may be used for new installations, periodic surveillance, or following repairs that may have affected machine performance. Calibration of the balancing machine is an activity done prior to verification testing and is outside the scope of this document. Troubleshooting of difficulties during the verification tests is also outside the scope of this document; this document is purely an instructive procedure.
EG-1A Balancing Committee
Balancing Machines - Verification Test RequirementsAS8617 (Current)08/25/2020
This document specifies instructions to verify proper calibration of all balancing machines used for processing gas turbine rotors. Detailed test procedures and test log samples are provided to evaluate the condition of the machine under test. These performance and test requirements may be used for new installations, periodic surveillance, or following repairs that may have affected machine performance. Calibration of the balancing machine is an activity done prior to verification testing and is outside the scope of this document. Troubleshooting of difficulties during the verification tests is also outside the scope of this document; this document is purely an instructive procedure.
EG-1A Balancing Committee
BEARING, BALL, AIRFRAME, ANTI-FRICTION, SELF-ALIGNING, DOUBLE ROW, HEAVY DUTYAS27643D (Current)06/02/2020
ACBG Rolling Element Bearing Committee
BEARING, BALL, AIRFRAME, ANTI-FRICTION, SELF-ALIGNING, DOUBLE ROW, HEAVY DUTYAS27643D-TEST-REC (Historical)06/02/2020
ACBG Rolling Element Bearing Committee
Plain Bearing No-Load Rotational Breakaway Torque MeasurementARP5448/5B (Current)05/26/2020
This test method provides a procedure for measuring no-load rotational breakaway torque of self-lubricating spherical bearings.
ACBG Plain Bearing Committee
Purge Pump Rotor Dynamics subjected to Ball Bearing Inner and Outer Race Wear Defects2020-01-040304/14/2020
The purge pump is used to pull evaporative gases from canister and send to engine for combustion in Turbocharger engines. The purge pump with impeller at one end and electric motor at the other end is supported by the ball bearing assembly. A bearing kinematic model to predict forcing function due to defect in ball bearing arrangement coupled with bearing dynamic model of rotor because of rotating component is proposed in this paper to get accumulated effect on transmitted force to the purge pump casing. Rotor dynamic of purge pump rotor components only produces certain order forcing responses which can be simulated into the multibody software environment knowing the ball bearing geometry parameters hence providing stiffness parameter for rotor system. Wear defects in the ball bearings, such as defects in the inner and outer races, cage, and balls generate different noise types that have asynchronous high-frequency orders and as well as sidebands frequencies due to frequency
Du, Isaac, Shrivastava, Sandeep, Sinha, Ankur
New Seven Speed DCT transaxle and effect of angular positioning of shaft in layout.2020-01-042904/14/2020
This paper presents about new concept developed on 7 speed DCT transaxle for transverse application and a torque capacity of 200 Nm to 360 Nm. How current 6 speed DCT can modified to 7 speed with packaging benefit is discussed. In this paper, discussions are focused about torque carrying parts of transaxle only. Here only single countershaft is used giving lot of packaging advantage and at first glance layout looks like four speed layout, but it is compact layout. Further in this paper effect of angular position of shaft in layout is discussed.. Position of shafts in transaxle layout effects the stress, bending moment and displacement induced in shaft. Detailed study on effect of change in angle with respect to Bending moment, Stress in shaft, Cylindrical roller bearing (CRB) and Deep Groove Ball Bearing (DGBB) Bearing reaction force analysis, life calculations are computed.
Bhat, Muralidhar
Seeing Around Corners to Detect Object ShapesTBMG-3637304/01/2020
A technique was developed that enables reconstruction of images in great detail. Researchers computed millimeter- and micrometer-scale shapes of curved objects, providing an important component to a larger suite of non-line-of-sight (NLOS) imaging techniques.
BEARING, BALL, AIRFRAME, ANTI-FRICTION, HEAVY DUTYAS27640E (Current)03/04/2020
ACBG Rolling Element Bearing Committee
Wheel End Assembly and Axle Spindle Interface Dimensions - Truck and BusJ2475_202002 (Current)02/13/2020
This recommended practice contains dimensions and tolerances for spindles in the interface area. Interfacing components include axle spindle, spindle threads, bearing cones, bearing spacer, seal, and wheel hub. This recommended practice is intended for axles commonly used on Class 7 and 8 commercial vehicles. Included are SAE axle configurations FF, FL, I80, L, N, P, R, U, and W.
Truck and Bus Wheel Committee
BOLT, MACHINE - DOUBLE HEX EXTENDED WASHER HEAD, PD SHANK, UNS N07718 - 185 KSIAS3580A (Current)12/10/2019
E-25 General Standards for Aerospace and Propulsion Systems
Shot Peening Media, Ultrasonically ActivatedAMS2585A (Current)11/04/2019
The complete requirements for procuring the product shall consist of this document and the latest Issue of the basic specification, AMS2431.
AMS B Finishes Processes and Fluids Committee
BEARING, ROLLER, NEEDLE, TRACK ROLLER, CROWN RADIUSED OD INTEGRAL STUD, TYPE VII ANTIFRICTION, INCHAS21447C (Current)10/22/2019
ACBG Rolling Element Bearing Committee
Setting Preload in Heavy-Duty Wheel BearingsJ2535_201910 (Current)10/07/2019
This SAE Recommended Practice applies to the four primary, large volume applications in the class 7-8 heavy-duty market place, as specified in SAE J1842: a “N” trailer axle b “R” powered rear axle c “FF / FG” nonpowered front axle d “P” trailer axle This document applies to on-highway applications. It is not applicable to those applications that exceed the GAWR ratings or the load line restrictions listed in columns “A,” “B,” and “C” of Table 1. Load lines are measured from the inboard bearing cup backface as shown in 3.4. This document establishes preload force values only. The methodology to obtain these force values must be determined by the fastener supplier and/or axle assembler. This document reviews the bearing system. It is NOT intended to prescribe (new or existing) axle and/or hub manufacturers’ ratings and/or specifications.
Truck and Bus Wheel Committee
BEARING, FIBER REINFORCED PLASTIC, SLEEVE, FLANGED, SELF-LUBRICATING, +250 °FAS85560/2C (Current)09/16/2019
ACBG Plain Bearing Committee
Development of a Low Friction High Performance Wheel Bearing Seal2019-01-213509/15/2019
The ever tightening of fuel economy and greenhouse gas emissions standards globally continues to challenge bearing companies toward lower torque, lower mass products. This paper focuses on improving fuel efficiency by considering the torque of automotive wheel bearing seals. This study establishes the level of drag torque reduction achieved through the structural design of the bearing seals. Wheel bearing seals are a critical component that must pass stringent torque, water exclusion, and other critical OEM and supplier performance specifications. They are designed as non-serviceable and must maintain full performance through the life of the vehicle. As a result of the application of specialized structural design, the drag torque, per the study, is reduced by more than 50% compared to existing bearing specifications. Electric vehicle companies are also seeking low friction wheel bearing solutions to further reduce CO2 (indirect or wheel-to-wheel) emissions. This research findings can
Kim, Yongwon, Cha, Chae Yeong, Jin, Seonggyu, Mahr, Reinhold, Lee, Seungpyo
Bearing Life Optimization for Automotive Wheel Bearings2019-01-213709/15/2019
Automotive wheel bearings have primary functions of translating the rotating motion of the wheels into linear vehicle motion while bearing the vehicle weight. Bearing life is affected by many parameters such as bearing geometry, vehicle and bearing technical specifications, driving conditions, lubrication conditions, material properties, and so on. In this paper, the optimization of bearing life was performed. Optimization formulation with no constraints was established to solve this problem. The large scale generalized reduced gradient, LSGRG, algorithm was applied to calculate the basic rating life and modified rating life proposed by ISO 281:1990 and ISO 281:2007, respectively. The optimization history for design variables and cost function were investigated. The results showed that the optimized basic rating life and modified rating life increased about 15% and 31% comparing with those of initial life, respectively.
Lee, Seungpyo
Air Caster TechnologyTBMG-3510609/01/2019
If there is a prime example of the need for friction-free, precise and delicate equipment movement in the aerospace and defense industries, satellite positioning during the testing cycle should be at the top of the list. Whether in a clean room or another environment, there is no margin for error when it's time to move the “bird” even a short distance. Anything short of a smooth relocation means unacceptable property loss and project delays if this most intricate piece of aerospace equipment is damaged. Disassembly is hardly an option.
BEARING, ROLLER, ROD END, EXTERNAL THREAD, SELF-ALIGNING, ANTI-FRICTION, AIRFRAME, HEAVY DUTY, TYPE I, -67° TO 350 °F, SEALEDAS21223B (Current)08/12/2019
ACBG Rolling Element Bearing Committee
BEARING, ROLLER, ROD END, INTERNAL THREAD, SELF-ALIGNING, ANTI-FRICTION, AIRFRAME, HEAVY DUTY, TYPE II, -67 TO 350 °F, SEALEDAS21220C (Current)08/12/2019
ACBG Rolling Element Bearing Committee
BEARING, FIBER REINFORCED PLASTIC, SLEEVE, PLAIN, SELF-LUBRICATING, +250 °FAS85560/1C (Current)08/06/2019
ACBG Plain Bearing Committee
Nickel Titanium Alloy Ball BearingsTBMG-3490908/01/2019
Innovators at NASA's Glenn Research Center have developed a new method for making small-diameter, high-grade ball bearings that are less than 0.25” in diameter thanks to the development of a new alloy made of 57.6% Nickel (Ni), 39.2% Titanium (Ti), and 3.2% Hafnium (Hf). The use of non-corrosive NiTi alloy instead of steel is an inexpensive way to increase the load capability and reduce the weight of a ball bearing.
SKF employs digital tools to enhance bearing design, performance19TOFHP08_1108/01/2019
It began with spherical roller bearings more than 100 years ago and now SKF finds itself amid a digital transformation. Over the years the bearing company has expanded beyond life modeling and bearings into condition modeling, John Schmidt, president, SKF USA Inc. and president industrial sales Americas, told media attending a recent Technical Press Day in Philadelphia, near the company's U.S. headquarters. Now data analytics and connected devices are helping to drive SKF's digitalization efforts. According to Michael D'Argenio, VP digital transformation & customer experience for SKF Americas, successful transformation is about more than upgrading technology. “It's about upgrading strategic thinking,” he said. A centralized digital platform, a unified data strategy, an ecosystem of connected products and apps, and a results-focused business model are all part of the company's strategic approach.
Shuttleworth, Jennifer
Shaft Nut and Keywasher Installation Dimensions forAS1495B (Current)07/29/2019
The purpose of this Standard is to provide installation dimensions for shaft nuts and their companion keywasher. The Standard type typically shown on MS9951 and MS9952, but is also suitable for parts which are dimensionally equivalent.
E-25 General Standards for Aerospace and Propulsion Systems
BEARING, ROLLER, SELF-ALIGNING. SINGLE ROW, ANTI-FRICTION, SEALED, -65 TO 350 °F, TYPE IAS21431D07/19/2019
ACBG Rolling Element Bearing Committee
Nut - Self-Locking Clinch, Serrated Shank, Hole Preparation, Installation and Removal ProceduresAS4389A (Current)07/01/2019
This SAE Aerospace Standard (AS) provides minimum design, hole preparation, installation and removal requirements for AS3272, AS3273, MA3274, and MA3275 serrated shank self-locking clinch nuts. This standard is applicable when specified on engineering drawings or in procurement documents.
E-25 General Standards for Aerospace and Propulsion Systems
Items per page:
1 – 50 of 1139