The down side of rigid preload is that the actual preload can vary as a result of thermal expansion. Additionally, the preload can vary when the spindle is operating at very high speeds as a result of centripetal force acting on the balls.<\/p>\n
<\/p>\n
Typical Spring Pack for Constant Pressure Preload<\/p>\n<\/div>\n
Constant Pressure Preload
\n<\/strong>Constant Pressure Preload is also called Spring Preload. It is generated by a series of springs reacting against the bearings in the axial direction. Thermal expansion is compensated for by the springs. Bearing preload variations are minimized in this configuration. Care must be given to match the individual springs to avoid uneven loading. This type of preload is common on smaller grinding spindles and is rarely used on mill or lathe spindles.<\/p>\nVariable Preload<\/strong>
\nSome machines use hydraulic pressure to control the preload. These machines can vary the bearing preload according to the operating speed. This method adds a significant amount of complexity to the design and is rather rare.<\/p>\n","protected":false},"excerpt":{"rendered":"Axial Preload for Angular Contact Bearings Preload is the load generated from the axial or radial interference within a bearing resulting in elastic deformation between rolling elements and the raceway. In other words, preload is the amount of force exerted against the rolling elements without the application of any external forces. Proper preload […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[24],"tags":[],"_links":{"self":[{"href":"https:\/\/hstspindles.com\/wp-json\/wp\/v2\/posts\/222"}],"collection":[{"href":"https:\/\/hstspindles.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hstspindles.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hstspindles.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hstspindles.com\/wp-json\/wp\/v2\/comments?post=222"}],"version-history":[{"count":2,"href":"https:\/\/hstspindles.com\/wp-json\/wp\/v2\/posts\/222\/revisions"}],"predecessor-version":[{"id":1029,"href":"https:\/\/hstspindles.com\/wp-json\/wp\/v2\/posts\/222\/revisions\/1029"}],"wp:attachment":[{"href":"https:\/\/hstspindles.com\/wp-json\/wp\/v2\/media?parent=222"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hstspindles.com\/wp-json\/wp\/v2\/categories?post=222"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hstspindles.com\/wp-json\/wp\/v2\/tags?post=222"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}