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Machining Processes - Cylindrical Grinding
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Cylindrical grinding is a process used to finish grind the outside or inside diameter of a cylindrical part. Cylindrical grinding produces a high quality finish and excellent accuracy and is usually a standard requirement for high accuracy parts.
Cylindrical grinding can be carried out by traversing the length of the surface, or plunge cutting can be used for narrower features. For centre grinding the work piece is either held between 2 centres and driven by a drive dog, or one end is driven by a chuck and the other end is located by the centre. For internal grinding the work piece is commonly held in a chuck only. The alternative is centreless grinding which is discussed in another process description.
One of the advantages of cylindrical grinding is that work pieces can be hardened or have hard coating applied before final finishing by grinding. As the hardening processes often distort the metal, centre grinding makes it possible to ‘true up’ and accurately finish hardened shafts. Another advantage of cylindrical grinding is that the fine finish reduces surface stress raisers and therefore reduces fatigue cracking.
Applications for cylindrical grinding include finishing bearing diameters and seal surfaces. Finish grinding hardchromed hydraulic cylinder shafts and hardfaced retainer pins. Sizing of hardened axles and transmission shafts.
CNC cylindrical grinders can also be used for volume production and to cylindrically grind complex curved surfaces.
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