Precision tapered roller bearing In some machine applications with heavy loads and speed requirements - such as the forging of forgings, the wire machine of oil pipelines, heavy duty lathes and milling machines, the selection of precision tapered roller bearings is an ideal solution. . Since the roller of the tapered roller bearing is designed for line contact, it can provide high rigidity and load to the main shaft. In addition, the tapered roller bearing is a pure rolling bearing design, which can reduce the bearing operation very well. Torque and heat to ensure spindle speed and accuracy. Since tapered roller bearings are capable of adjusting the axial preload (play) during installation, this allows the customer to better optimize bearing clearance throughout the life of the bearing. In addition, in some high-speed applications where the inner ring rim speed is greater than 30 m/s, some specially designed tapered roller bearings can also meet the requirements, such as TSMA bearings or Hydra-Rib hydraulic floating rib bearings (see Figure 3). ). The rib of the TSMA bearing has a plurality of lubricating oil holes in the axial direction, which can be lubricated by circulating oil or oil mist. The centrifugal force can distribute the oil to the contact area between the roller and the rib, so that the bearing can be more fully lubricated and the bearing can be improved. Rotating speed. The Hydra-Rib hydraulic floating rib bearing is designed to optimize the preload of the spindle system. The bearing has a floating rib that contacts the large end of the roller, unlike the common bearing with a fixed inner ring rib; The floating rib is positioned by the “pressure†system, which ensures that the bearing will perform at its best under all conditions and has been successfully used in domestic customers. For the precision selection of tapered roller bearings, ISO P5 bearings are mainly used in conventional lathes and milling machines. For machining centers, grinding machines, etc., precision bearings of ISO P4 or higher are usually selected. In the spindle design, there are two common tapered roller bearing layouts. The first is a tapered roller bearing with a front and rear end and a face-to-face mounting (see Figure 4); this design is compact, rigid and easy to install and adjust. The second is to use two tapered roller bearings to face-to-face as the front end of the main shaft, while the rear end uses a double outer ring and two single inner ring bearings (TDO) as the floating end (see Figure 5); This type of design can withstand the axial thermal expansion of the spindle well, and the rigidity is high, which ensures the accuracy of the machine tool. 4 Person Hot Tub 4 Person Hot Tub,home outdoor spa,outside jacuzzi pool,round hot tub,garden hot tubs Guangzhou Aijingsi Sanitary Products Co.,Ltd , https://www.hottubdesign.com
Figure 3. Spindle design with hydraulic floating rib bearing 
Figure 4. Single row tapered roller bearings mounted in pairs 
Figure 5. Front-end single-row tapered roller bearings mounted in pairs, rear-end TDO Previous page 1 2 3 4 5 Next page