Grease fitting
![Grease fitting on a bearing](/Images/godic/202501/16/Schmiernippel013534.jpg")
![A grease nipple on the driver's door of a 1956 VW Beetle](/Images/godic/202501/16/Wiki-Projekt_Private_Fahrzeugsammlung_Braunschweig_NIK_18653534.JPG")
![Alemite Lubricator Company advertisement in the Saturday Evening Post, 1921. At the time of this advertisement, the fittings were of the flat-top type, but Zerk fittings would soon appear.](/Images/godic/202501/16/Alemite_advert_in_Saturday_Evening_Post_19213536.png")
![A typical engine oilerThis is one made by Lunkenheimer](/Images/godic/202501/16/Engine_oiler3536.jpg")
A grease fitting, grease nipple, Zerk fitting, or Alemite fitting is a metal fitting used in mechanical systems to feed lubricants, usually lubricating grease, into a bearing under moderate to high pressure using a grease gun.
Grease fitting
英语百科
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