Hone 4132130 221484471 2008-06-24T18:29:39Z 79.33.68.121 /* See also */ {{otheruses4|the machine tool|the hand tool|Sharpening edged tools}} [[Image:Hoontjes 2- en 3-poots.jpg|thumb|Honing tools]] {{Wiktionary}} A '''hone''' is a [[machine tool]] used in the manufacture of precision [[drill bit|bores]] to improve the geometry, surface finish and dimensional control of the finished part. This process is called '''honing'''. Typical applications are the finishing of [[cylinder (engine)|cylinders]] for [[internal combustion engines]], [[air bearing]] spindles and in [[gear manufacturing]]. Types of hone are many and various but all consist of one or more [[abrasive|abrasive stones]] that are held under [[pressure]] against the surface they are working on. The hone is usually turned in the bore while being moved in and out. Special [[cutting fluid]]s are used to give a smooth cutting action and to remove the material that has been abraded. Machines can be portable, simple manual machines, or fully automatic with [[Gauge (engineering)|gauging]] depending on the application. Modern advances in abrasives have made it possible to remove much larger amount of material than was previously possible. This has displaced grinding in many applications where "through machining" is possible. External hones perform the same function on shafts. ==Cross-hatch Finish== A "cross-hatch" pattern is used to retain oil or grease to ensure proper lubrication and ring seal of pistons in cylinders. A smooth glazed cylinder wall can cause piston ring and cylinder scuffing. The "cross-hatch" pattern is used on brake rotors, and flywheels. Other similar processes are [[lapping]] and [[superfinishing]]. ==See also== * [[Reamer]] [[Category:Grinding and lapping]] [[Category:Machine tools]] [[az:Honalama]] [[de:Honen]] [[it:Levigatura]] [[nl:Honen]] [[ru:Хонингование]]