Lubrication and Reliability Handbook 2010 Part 12 ppt

... when coarse material tears off sizeable particles from wearing surfaces. This normally involves high imposed stresses and is most often encoun- tered when handling large lumps. High-stress abrasion This ... vari- able speed control and cooling facilities, are built by specialists in the manufacture or repair of bearings. (ii) Speed and temperature control Rotational speed and pouring...

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... in machine operation and maintenance of all kinds of machinery and plant. This Page Intentionally Left Blank

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... reservoir for re-use. There are two groups of systems: group 1, lubrication with negligible heat removal; and group 2, lubrication and cooling. GROUP 1 SYSTEMS Virtually any form of mechanically ... (measured in Lubrication Units) can be totalled for each section of the pipework, and this determines the size of pipe required for that section. The actual relationship is given in Ta...

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... Selection of heaters and coolers A23.1 Lubricating oil heaters and coolers are available in many different forms. The most common type uses steam or water for heating or cooling the oil, and consists ... Selection of filters and centrifuges A22.1 Figure 22.1 Typical circuit showing positions of various filters Table 22.1 Location and purpose of filter in circuit Table 22.2 Range of...

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... crown and ring land damage Characteristics The crown may show cracking and the crown land and lands between the rings may show major distortion, often with the ring ends digging in to the lands. Causes Major ... due to excessive clearance between housing and shaft Figure 15.11 Packed gland showing abnormal leakage outside the gland follower Figure 15 .12 Packed gland showing uneven c...

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... wear. Causes Overheating and unsuitable friction material. Band crushing* Characteristics Loss of friction material at the ends of a band in a band clutch. Usually results in grooving and excessive wear ... member. Causes Crushing and excessive wear of the friction material owing to the high loads developed at the ends of a band of a positive servo band clutch. Burst failure Characteris...

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... B12.1 fatigue, B12.1 fracture, B12.3 fretting, B12.2 grease failure, B12.4 magnetic damage, B12.3 misalignment, B12.2 overheating, B12.4 roller breakage, B12.3 uneven wear, B12.3 washboard marking, B12.4 Rolling ... bearing lubrication, A8.2 Roller chain lubrication, A9.2, A17.2 Rolling bearing failures: abrasive wear, B12.4 bruising, B12.1 corrosion, B12.1 damaged rollers, B12.3 false brin...

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... viscosity and other characteristics of the fluid have been omitted from this table, these play a very large and often complicated part in grease perform- ance. Certain bearing manufacturers demand ... and the type of thickener used in their manufacture. The section of this handbook on greases summarises the properties of the various types. Additive oils are not required for plain be...

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... local conditions and environment) A8 Rolling bearing lubrication A8.3 Calculation of relubrication interval The relubrication period for ball and roller bearings may be estimated using Figures 8.1 and 8.2. ... sorting, handling and application of lubricants. In arriving at this rationalised list of grades, speeds, tolerances, wear of moving parts and seals create conditions where...

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... the design pressure and temperature. Figure 25.1 A basic lubrication system complete with warning and protection devices Table 25.1 The function of each major system component and the device required ... may be excessive Table 28.6 Particle sizes of common materials as a guide to the specification of seals and air filters A27Running-in procedures A27.3 In research and development...

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