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Effect of three design parameters on the operating characteristics of 75-millimeter-bore cylindrical roller bearings at high speeds

Description: Report presenting three experimental investigation conducted with 75-millimeter-bore cylindrical roller bearings to determine the effects of roller axial clearance ratio, cage diametral clearance ratio, and cage land width-diameter ratio on bearing operating temperatures, wear, cage slip, and high-speed operating characteristics.
Date: October 1956
Creator: Anderson, William J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Investigation of 75-millimeter-bore cylindrical roller bearings at high speeds: 1: Initial studies

Description: Report presenting an experimental investigation of 75-millimeter-bore roller bearings of three different cage types were conducted over a range of DN values and static radial loads with circulatory oil feed. Three incipient failures were noted out of seven bearings investigated. Results regarding rig bearing temperatures, bearing failures, effect of running time, circumferential temperature distribution, effect of DN value on operating temperature, effect of load on operating temperature, effec… more
Date: July 1950
Creator: Macks, E. Fred & Nemeth, Zolton N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Experimental Investigation of Eccentricity Ratio, Friction, and Oil Flow of Short Journal Bearings

Description: An experimental investigation was conducted to obtain performance data on bearings of length-diameter ratios of 1, 1/2, and 1/4 for comparison with theoretical curves. A 1.375-inch-diameter bearing was tested at speeds up to 6000 rpm and with unit loads from 0 to 900 pounds per square inch. Experimental data for eccentricity ratio and friction followed single lines when plotted against a theoretically derived capacity number, which is equal to Sommerfeld number times the square of the length-di… more
Date: November 1952
Creator: DuBois, G. B. & Ocvirk, F. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Preliminary investigation of molybdenum disulfide-air-mist lubrication for roller bearings operating to DN values of 1 x 10(exp 6) and ball bearings operating to temperatures of 1000 degrees F

Description: The effectiveness of molybdenum disulfide MoS2 as a bearing lubricant was determined at high temperature and at high speeds. A 1-inch-bore ball bearing operated at temperatures to 1000 F, a speed of 1725 rpm, and a thrust load of 20 pounds when lubricated only with MoS2-air mist. A 75-millimeter-bore cageless roller bearing, provided with a MoS2-syrup coating before operation, operated at DN values to 1 x 10(exp 6) with a load of 368 pounds.
Date: October 15, 1951
Creator: Macks, E. F.; Nemeth, Z. N. & Anderson, W. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Preliminary comparison of 17- and 75-millimeter-bore cageless cylindrical roller bearings with conventional cylindrical roller bearings at high speeds

Description: Preliminary results at high speeds indicate lower bearing temperatures, less internal bearing wear, and greater reliability of the conventional, cage-type cylindrical roller bearings than of either full-complement or special cageless roller bearings of the types investigated, although the latter bearing types have been operated successfully to DN values of 1.0 X 10 superscript 6.
Date: March 5, 1953
Creator: Macks, E. Fred; Anderson, W. J. & Nemeth, Zolton N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Resistance of Various Bearing Materials to Chemical Attack by Nitric Acid and Uranyl Nitrate Hexahydrate

Description: The purpose of this study has been to evaluate the chemical resistance of various bearing materials to solutions of nitric acid and uranyl nitrate hexahydrate with views toward selecting the best material to be used as bearings in Purex submerged rotating equipment.
Date: March 11, 1954
Creator: Groves, Norman D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Experiments With Needle Bearings

Description: Experiments and results are presented in testing needle bearings, especially in comparison with roller bearings. Reduction in coefficient of friction is discussed as well as experimental methods and recording devices.
Date: May 1933
Creator: Ferretti, Pericle
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Pneumo MSG-325 Lathe

Description: The LASL Shop Department has recently installed a Pneumo MSG-325 two-axis contouring lathe. This one-microinch resolution lathe, which utilizes both air-bearing spindle and air bearing slide ways, was purchased primarily for miniature work, but can also single point diamond turn metal optics.
Date: January 1, 1980
Creator: Rhorer, Richard L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Ambient-Temperature Passive Magnetic Bearings for Flywheel Energy Storage Systems

Description: Based on prior work at the Lawrence Livermore National Laboratory ambient-temperature passive magnetic bearings are being adapted for use in high-power flywheel energy storage systems developed at the Trinity Flywheel Power company. En route to this goal specialized test stands have been built and computer codes have been written to aid in the development of the component parts of these bearing systems. The Livermore passive magnetic bearing system involves three types of elements, as follows: … more
Date: May 26, 2000
Creator: Bender, D. & Post, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Performance of 110-millimeter-bore M-1 tool steel ball bearings at high speeds, loads, and temperatures

Description: Report presenting eleven 110-millimeter-bore ball thrust bearings made of M-1 tool steel were operated over a range of DN values at mean outer-race temperatures to 678 degrees Fahrenheit. Testing occurred at a variety of thrust loads, radial loads, oil flows, and oil inlet temperatures. Results regarding the difference between tests without heat addition and tests with heat addition, fatigue failures, performance of cage materials, and oil-interruption tests are provided.
Date: January 1957
Creator: Anderson, William J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Discrepancies Between Theoretical and Observed Behavior of Cyclically Loaded Bearings

Description: Note presenting an analysis of discrepancies between theory and the experimental behavior of a cyclically loaded shaft rotating in a sleeve bearing. For constant loads rotating at one-half the frequency of shaft rotation, eccentricity ratios were found to be unity when kerosene was used to lubricate the test bearing.
Date: November 1951
Creator: Dayton, R. W.; Simons, E. M. & Fend, F. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Experimental Investigation of Eccentricity Ratio, Friction, and Oil Flow of Long and Short Journal Bearings With Load-Number Charts

Description: Note presenting a study of the performances of plain bearings under steady central loading, which are compared and summarized by single-line curves covering the range of length-diameter ratios both above and below 1. Results regarding load number, eccentricity ratio, bearing friction ratio, couple friction ratio, and oil flow factor are provided.
Date: September 1955
Creator: DuBois, G. B.; Ocvirk, F. W. & Wehe, R. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Lubrication and cooling studies of cylindrical-roller bearings at high speeds

Description: The results of an experimental investigation of the effect of oil inlet distribution and oil inlet temperature on the inner and outer-race temperatures of 75-millimeter-bore (size 215) cylindrical-roller inner-race-riding cage-type bearings are reported. A radial-load test rig was used over a range of dn values (product of the bearing bore in mm and the shaft speed in r.p.m) from 0.3 x 10(5) to 1.2 x 10(6) and static radial loads from 7 to 1113 pounds.
Date: April 4, 1951
Creator: Macks, E. Fred & Nemeth, Zolton N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Tests of Lead-Bronze Bearings in the DVL Bearing-Testing Machine

Description: "The lead-bronze bearings tested in the DVL machine have proven themselves very sensitive to load changes as in comparison with bearings of light metal. In order to prevent surface injuries and consequently running interruptions, the increase of the load has to be made in small steps with sufficient run-in time between steps. The absence of lead in the running surface, impurities in the alloy (especially iron) and surface irregularities (pores) decreases the load-carrying capacity of the bearin… more
Date: June 1940
Creator: Fischer, G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Evaluation of a Low Friction - High Efficiency Roller Bearing Engine

Description: This Low Friction (High Efficiency Roller Bearing) Engine (LFE) report presents the work done by The Timken Company to conduct a technology demonstration of the benefits of replacing hydrodynamic bearings with roller bearings in the crankshaft and camshaft assemblies of an internal combustion engine for the purpose of collecting data sufficient to prove merit. The engines in the present study have been more extensively converted to roller bearings than any previous studies (40 needle roller bea… more
Date: June 30, 2009
Creator: Kolarik, Robert V., II; Shattuck, Charles W. & Copper, Anthony P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Experimental Investigation of Oil Film Pressure Distribution for Misaligned Plain Bearings

Description: Note presenting a demonstration of the effect of axial and twisting misaligning couples on the oil film pressure distribution of a loaded bearing as shown by photographs of a number of three-dimensional plaster models representing averaged oil film pressure distribution under representative conditions. Five models with five different conditions were tested. Results regarding the oil film pressure distribution, bearing temperature distribution, and friction are provided.
Date: October 1951
Creator: DuBois, G. B.; Mabie, H. H. & Ocvirk, F. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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