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Patent

Dynamic pressure fluid bearing

TLDR
In this article, a liquid regulating hole connected to the bottom of the cylindrical hole of a bearing from the exterior is used to prevent wear of a radial bearing surface due to the shortage of oil.
Abstract
PURPOSE:To prevent wear of a radial bearing surface due to the shortage of oil by providing a liquid regulating hole connected to the bottom of the cylindrical hole of a bearing from the exterior, inserting a shaft into the bearing and fitting a plug into the liquid regulating hole CONSTITUTION:An oil regulating hole 5 connected to the exterior from the corner of a thrust bearing surface 26 and a radial bearing surface 2a is provided at a bearing 2 for mounting a shaft 1 A plug 6 is inserted in the oil regulating hole 5 The plug 6 releases air between air between the shaft 1 and the bearing 2 from the oil regulating hole 5 and also the oil quantity between the shaft 1 and the bearing 2 is regulated Thus, wear of the radial bearing surface due to the shortage of the oil can be prevented

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Patent

Hard disk drive device, and fluid dynamic bearing spindle motor and assembling method thereof

TL;DR: In this article, a case with an upright shaft and a cylindrical hub coupled to the shaft is presented, where an oil surface adjusting hole and a plug for sealing the hole are provided in the case opposite the seal part.