Download or read book Factors Affecting Simulated Service Tests of Greases written by Sidney M. Collegeman and published by . This book was released on 1949 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: There have been many attempts to establish a reliable means for predicting the service life of a grease. Greases have been selected on the basis of composition, physical characteristics, and operation in actual equipment. More recently, simulated-service tests have been used and have been accepted as a dependable means of evaluating greases. These tests are in most cases less time consuming than those in actual standard equipment. However, there is still a need for a means of accelerating testing to obtain results in a shorter time without reducing their reliability. This paper deals with our attempts to accomplish this objective. The initial work on the evaluation of greases by performance tests led to the development of the Navy Grease Machine. This work was described by Adams and Patten in 1941. This machine was abandoned when reports from the field indicated that the premises on which its evaluation of greases was based were invalid. It then was necessary to devise a test which would more nearly simulate service conditions. Simulated-service testing of greases under conditions of high temperature and high speed was started with an apparatus designed to rotate a No. 204, grease-lubricated ball-bearing at 10,000 rpm. while maintaining any desired temperature. A Specification for High Temperature Water Resistant Grease was subsequently written around this apparatus using as the criterion of acceptability a minimum of 300 hr. satisfactory bearing operation at a temperature of 300 F. This work was summarized last year by Adams and Collegeman. The information and experience gained with this apparatus were used to design and construct an improved tester which permits better control of more variables. This apparatus has been given the name of Universal Grease Tester, a single unit of which is illustrated in Fig. 1. This apparatus recognizes and provides control of four variables: temperature, speed, bearing size, and bearing load, both radial and axial. Permissible temperatures with this installation range up to 500 F., speeds up to 20,000 rpm., bearing sizes up to 60-mm. bore, and bearing loads up to 50 lb. The radial-load range can be extended readily by modification of accessories without changing the basic design of the unit. In order to obtain in a reasonable time sufficient replicate runs for appraisal of both the magnitude and the variability of the results, thirty units of this tester have been installed. Two views of the assembly are shown in Figs. 2 and 3.

Download or read book Technical Data Digest written by and published by . This book was released on 1949 with total page 926 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Confidential Documents written by United States. Army Air Forces and published by . This book was released on 1949-07 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Symposium on Functional Tests for Ball Bearing Greases written by American Society for Testing Materials and published by . This book was released on 1949 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ASTM Standards on Petroleum Products and Lubricants with Related Information written by and published by . This book was released on 1959 with total page 1266 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ASTM Bulletin written by American Society for Testing Materials and published by . This book was released on 1949 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ASTM Standards on Petroleum Products and Lubricants written by ASTM Committee D-2 on Petroleum Products and Lubricants and published by . This book was released on 1961 with total page 1320 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings written by American Society for Testing and Materials and published by . This book was released on 1952 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. 61-66 include technical papers.

Download or read book Proceedings American Society for Testing Materials written by American Society for Testing Materials and published by . This book was released on 1952 with total page 1338 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. 61-66 include technical papers.

Download or read book Bulletin written by American Society for Testing Materials and published by . This book was released on 1957 with total page 1740 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fuel Abstracts written by and published by . This book was released on 1949-12 with total page 974 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Maintainability Guide for Design written by McGraw-Hill Book Company. Information and Training Services Division and published by . This book was released on 1970 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mechanical Failure Definition of the Problem written by Mechanical Failures Prevention Group and published by . This book was released on 1976 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Engineering Design Handbook written by and published by . This book was released on 1972 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Significance of Tests for Petroleum Products written by Salvatore J. Rand and published by ASTM International. This book was released on with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Journal of the Institution of Petroleum Technologist written by Institute of Petroleum (Great Britain) and published by . This book was released on 1945 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fuels and Lubricants Handbook written by and published by ASTM International. This book was released on with total page 1088 pages. Available in PDF, EPUB and Kindle. Book excerpt: