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Preloading is used to increase the feed accuracy and rigidity of ball screws. Why is this necessary? In many applications utilizing ball screw actuation, position accuracy is of utmost importance. With many ball screw driven actuators, position accuracy can be achieved ...

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Ball screws are one of the many components seen throughout factory automation applications. Using the same concept seen with a bolt and nut, this assembly uses the rotary motion of the screw to actuate the nut in a linear direction. ...

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The aluminum extrusion (also known by ‘aluminum frames’) forming process is a bulk plastic deformation process. First, a billet of aluminum is preheated to a specified temperature that is still comfortably below the material melting point in order to facilitate ...

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The relatively new and sometimes confusing world of Geometric Dimensioning and Tolerancing (GD&T) opens up a whole new world of ways for engineers to control the geometry of everything from every day parts to complicated geometric surfaces. GD&T allows the ...

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Introduction Another important consideration to take into account when trying to locate work pieces is the role external forces will play in the process. Depending on the machining process that the work piece will be subjected to, there may be ...

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Introduction One of the problems faced when locating on jigs and fixtures is the presence of burrs and foreign material on the locating surfaces. These instances occur because manufacturing processes are imperfect and produce chips and rough/raised surfaces.  Burrs are ...

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Introduction Continual advancements in the fields of mechanization and automation have led to large strides forward for the manufacturing industry. Various products ranging in size from cars to small circuit components are today made through automated procedures in manufacturing facilities. ...

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Engineering Fits It seems like even the most basic engineering design decisions can be exceedingly difficult and complex. Almost every mechanical system involves some sort of hole/shaft joint, and an innumerable amount of diverse fits may be specified depending on ...

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Rotary bearings are machine elements that support rotating shafts accurately while providing low friction conditions. In order to maintain a stable bearing performance over a prolonged duration, appropriate bearing fit design considerations are required to avoid any negative effects ([Chart 1]) ...

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