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Industrial Lubrication and Tribology

Publisher:
MCB UP Ltd
Emerald Publishing
ISSN:
0036-8792
Scimago Journal Rank:
33
journal article
LitStream Collection
Hydrodynamics of a slider cylinder on a parallel track: mobility method of solution

V.H. Mucino; K. Sun; J.E. Smith

2000 Industrial Lubrication and Tribology

doi: 10.1108/00368790010308384

The system studied here consists of a non-rotating cylinder sliding inside a fully lubricated parallel track with a prescribed longitudinal velocity, carrying a transverse load (normal to the track). Reynolds equations are used for the particular case of a non-rotating sliding cylinder in a fully lubricated track. Two short-bearing mobility charts are developed for a normalized clearance track (equivalent to those developed by Booker for journal-bearings). Pressure distributions around the cylinder and motion paths within the clearance track are produced for prescribed transverse loading and longitudinal speed requirements for hydrodynamic analysis purposes. Numerical application examples are presented for general and specific cases at the end.
journal article
LitStream Collection
Testing device compatibility and possible measurement errors in dry sliding

Mircea Terheci

2000 Industrial Lubrication and Tribology

doi: 10.1108/00368790010308393

Attempts to reveal some of the factors that might cause measurement and evaluation errors in dry sliding. Discusses matters such us “what” and “how” is simulated and “why” and “what” is really measured and suggests ways to tackle these matters. Presents means of avoiding measurement errors as well as suitable testing procedures. Suggests a strategy of experimental work that encompasses the needs of both pure research and engineering design. It was found that the pin‐on‐disc test largely satisfies the conditions for a good simulation of certain engineering applications while providing a wealth of data for both scientific insight and engineering design.
journal article
LitStream Collection
Comparative study of wear mechanism of duplex treated M7 HSS drill bits

B.S. Yilbas; M. Rashid; M. Nizam

2000 Industrial Lubrication and Tribology

doi: 10.1108/00368790010308401

The surface coating of drill bits improves the tool life considerably and enhances the end product quality. The improved coating is desirable for long service operations. One of the methods to achieve this is to develop an interface layer between the coat and the tool base such that the transition of shear properties occurs across the interface layer. The application of duplex treatment (plasma pre-nitriding before PVD TiN coating) to the tool surface becomes fruitful in this regard. In the present study, the wear properties of the duplex treated and untreated M7 HSS twist drill bits are examined. The wear tests are conducted on a dry base, and the feed rate and rotational speed are kept constant during the drilling tests. SEM and EDS are conducted to analyze the wear properties and metallurgical changes on the tool surface after the tests. It is found that the build up edge forms on the untreated tool surface, which in turn results in adhesion and abrasive wear. In the case of duplex treated drill bit, thinning of TiN coat is observed, but the coat is neither partially nor totally pealed off from the tool surface in the wear land.
journal article
LitStream Collection
Grease lubrication of roller bearings in railway waggons. Part 1: field tests and systematic evaluation to determine the optimal greases

Jan Lundberg

2000 Industrial Lubrication and Tribology

doi: 10.1108/00368790010308410

Describes a comprehensive field test to determine the best grease for spherical roller bearings in railway waggon wheels and increase the knowledge of grease lubrication. Nine different fully-formulated commercial greases were examined in the wheel bearings of five ore waggons, used for transporting ore commercially by railroad from the Kiruna Mine in northern Sweden to Narvik in northern Norway for shipping to foreign markets. After the end of the test period, the wear and electrical damage, as well as the rust on the bearings, were also studied. In order to find out the optimum grease for this application, draws up a specification of requirements and uses a systematic approach to development of an evaluation method that could be applied to greases in actual service.
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