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The meaning of the suffix letters of the NACHI ball screw support bearing
Features of TAB series ● This bearing adopts polyamide cage, and the number of steel balls is more than that of ordinary angular contact ball bearings. Therefore, the bearing rigidity is higher than that of ordinary bearings. ● This kind of bearing has been pre-set with preload, so it is easy to install, no need to measure the installation torque. ● This kind of bearing has a contact angle of 60℃ and can bear radial and axial loads at the same time. The structure of the shaft and bearing housing can be simplified. ● Bearings with seals are available in two types: contact seals and non-contact seals, and the appropriate one can be selected according to the application. The contact angle is 60 as the standard. The cage is a ball-guided, polyamide resin cage as standard. Accuracy is based on JIS class 4, please refer to page 10 for details. Structure of NACHI Ball Screw Support Bearing Models. Example model: 30TAB06DB -2LR /GM P4 30u003dInner diameter dimension (mm) TABu003dBearing type code 06u003dOuter diameter dimension code The value of dividing the outer diameter dimension by 10 DBu003dAssembly code U : Free assembly (single row) DU : Free assembly (double row assembly) DB: Back to back assembly DF: Face to face assembly P4 : Equivalent to JIS Class 4 (standard) GLu003dPreload class code/GM : Medium preload (standard) The preload is based on the medium preload. Please refer to page 20. Load displacement diagram ball screw support bearing This kind of bearing is used to support the ball screw, and the ball screw is the transmission mechanism of high-precision, high-speed machine tools, precision measuring equipment, and robots. This is a high-precision, high-performance bearing.
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