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OTHER MARKING SYSTEMS

Because superabrasive usage is proportionally larger in Europe and Japan, wheels with markings other than Standard U.S. designations may be found. One example is the FEPA (Federation of European Producers of Abrasive Products) Standards. These standards apply to a variety of

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ADAPTIVE MACHINE CONTROLLERS

Adaptive machine controls that respond to the actual machining conditions while the grinding is in progress have been developed for production grinding machines. In general, the grinding force is sensed and a constant force is maintained by the controller,or machine deflections are fed back to a computer/controller for processing and making changes in grinding parameters. Acoustic emission …

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METHODS OF MEASURING TAPERS

The most convenient and simple way of checking tapers is to use the taper plug gage (Figure I-367) for internal tapers and the taper ring gage (Figure I-368) for external tapers. Some taper gages have go and no-go limit marks on them (Figure I-369). To check an internal taper, first …

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USE OF TAPERS

Tapers are used on machines because of their capacity to align and hold machine parts and to realign them when they are repeatedly assembled and disassembled. This repeatability assures that tools such as centers in lathes, taper shank drills in drill presses, and arbors in milling machines will run in perfect alignment when placed in …

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FACING

The material to be machined usually has been cut off in a power saw, so the piece is not square on the end or cut to the specified length. Facing from the center out (Figure I-158) produces a better finish, but it is difficult to cut on a solid face in the center. Facing …

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TURNING MACHINE SAFETY

SAFETY FIRST The lathe can be a safe machine only if the machinist is aware of the hazards involved in its operation. In the machine shop, as anywhere, you must always keep your mind on your work, to avoid accidents. Develop safe work habits in the use of setups, chip …

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