No abstract

Although this results in three handbooks published within a sixteen year period, this does not imply that a choice can necessarily be made to obtain one to the exclusion of the others. Coverage of specific areas will be different simply due to the different viewpoints and areas of interest and expertise of the authors and the editor. These very differences, in fact, provide the user with a broader view of the specific topic of interest and should provide a better basis for judging what action to take in a specific situation. And, of course, a recently published handbook should provide "the latest information in the field."In this respect, then, it is this reviewer's opinion that this new handbook will add to the value of the tribologist's library, even if this now includes the other handbooks mentioned.By their very nature, handbooks that cover broad fields, as lubrication (or more properly, tribology), are often rather large books. Here, the decision was made to publish this handbook in two volumes. This results in each volume being closer to a "textbook" size, and thus more manageable, but in addition, the division of material between the two permits some users the savings from being able to obtain only the volume of specific interest.Volume I of this hand book is subtitled "Application and Maintenance," and this is covered in the three primary sections under the headings; (a) Applications; (b) Industrial Lubrication Practices; and (c) Maintenance. An Appendix includes symbols for lubrication calculations and SI units with conversion factors.Of the thirty-eight contributers to volume one, only five were also contributors to the 1968 ASLE sponsored handbook. Although the subject matter is, of course, much the same, it is thus presented through somewhat different viewpoints. There is new subject matter, also. Of the thirtythree titled sections in volume one, eleven of these review lubrication aspects were not covered in the earlier handbook.One of these new areas is that of automotive lubrication other than the engine. This includes automatic transmission, Waukesha Bearings Corp., Waukesha, Wise. 53187. gear boxes, rear axles, and the chassis. Although this area of automotive lubrication is well documented by the manufacturers for the service industry, it is helpful to have the general procedures and practices in a handbook of this type for the benefit and knowledge of those not directly involved with these areas. This, of course, is one of the values of a handbook of this type. It provides in one location information on the practices used in a broad range of industries and products, and can be a source for problem solutions in one area through knowledge of what has been done elsewhere.In the Applications" section of this handbook, the lubrication of engines other than automotive is also covered in addition to turbines, compressors, motors, hydraulic equipment, machine tools, and other machinery.In the "Industrial Lubrication Practices" section, new industries reviewed (as compared to the 1968 handbook) are text...

No abstract

Laboratory tests were conducted on six-in-dia tilting pad thrust bearings to compare operating characteristics of several pad facing and backing material combinations and also to study the effects of different oil feed and discharge arrangements. Tests were conducted at various speeds and loadings, including a series of failure tests. Results of these tests are presented.

Tilting pad thrust bearings are commonly used on both the active and inactive (loaded and unloaded) sides of thrust collars of turbomachinery rotors. Fatigue failure of temperature sensor leadwires to the inactive side thrust pads and abnormal wear at contact points of these thrust pads, in several field applications, led to an investigation as to the cause. Since these problems occurred only on “unloaded” thrust bearings, flutter (vibration) of these inactive side thrust pads was suspected. Tests were run in the laboratory on a double thrust bearing under conditions simulating a turbomachine application. Pad flutter was found at two distinct conditions; low oil flows (as suspected), and also at high oil flows. The paper presents the results of these tests with data on the influence of the parameters studied, and the findings with respect to elimination of this flutter.