Chucks Review & Restoration by Machinery Magazine

By Machinery Magazine

Many Machinist initiatives, would receive advantages from examining this booklet.

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Preventive action can be quite varied, ranging from the modification of an operating procedure to the replacement of the failed machine. The huge number of possibilities makes it impossible to do more than just mention some examples: 1. Component standardization has enormous advantages—reduction of inventory, standardization of maintenance and operation procedures, and reduction of mean time to repair. Many components can be standardized easily, like mechanical seals, couplings, antifriction bearings, small turbine governors, and lubrication oil.

This can be easily understood when we compare a careless driver with a conscientious one, normally the latter will have fewer problems with a car. The same applies to process plant operators, who should be trained and motivated on how to get the most out of the equipment. Failure Prevention Efforts 29 Some examples of actions taken by a reliability focused plant, in addition to providing operator training and other working conditions, are 1. Instructing the operators about the design limits of the equipment and the consequences of off-design operation.

Mechanical testing may be used to check material properties. The comparison of the originally specified mechanical properties 20 Introduction to Failure Analysis with those found in the failed part may uncover a material problem, such as the use of incorrect material or a deficiency of the heat treatment of the part. 4. Chemical analysis of the component material or residues found on the damaged parts may provide other clues to indicate the source of the problem. 5. Mechanism failures always should be reenacted as much as possible, to make sure that the proposed sequence of events is feasible.

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