Angular contact ball bearing is a relatively common bearing we use in lathe spindle bearings. It teaches you to use simple methods and common tools to test whether the accuracy of lathe spindle bearings meets national standards. The tools used are: lever Sub-table, magnetic table base, 3 pieces of 100mm long standard blocks, 1 piece of marble slab, 1 piece of 100X100X20 parallel fast. Clean and tidy the flat plate, 6 end faces of 3 standard blocks, the bottom edge of the magnetic table base, and the upper and lower sides of the parallel surface block, distribute the standard blocks on the flat plate at 120°, and place the reference surface of the lathe spindle bearing on the top of the standard block. The seat is glued to the parallel surface block, and the head of the lever dial indicator is placed on the end face of the outer ring of the bearing, so that the lever indicator head is pressed down by 0 to 0.4mm, and the reading of the dial indicator is read and recorded. Gently push the parallel block connected to the magnetic meter seat and move it inward to the end face of the bearing inner hole, read and record the reading of the dial indicator, and calculate two sets of reading errors X, that is, the end face with a large reading is lower than the end face with a small reading X. For example, the reading of the dial gauge head on the outer end face is 0.14mm, and the reading on the inner ring end face is 0, which means that the inner ring end face is 0.14mm lower than the outer ring end face. Then turn it around and keep the bearing position unchanged, press the lever dial gauge head down against the end face of the outer ring of the lathe spindle bearing and press the gauge head down by 0 to 0.4mm, read the dial gauge and record it. Then move to the end face of the inner ring to read and record the reading of the dial indicator, and calculate the reading error Y of two groups, that is, the end face with a large reading is higher than the end face with a small reading. Using the above whole process to measure 4 points symmetrically on the circle, the smaller the difference between the measured values, the higher the accuracy of the bearing. If the measured values ​​of the 4 points are far apart, the bearing accuracy is not very high. The production of lathe spindle bearings has always been favored by users with high precision. Our company mainly produces angular contact ball bearings, deep groove ball bearings, roller bearings, needle roller bearings four categories, the size range is up to 450mm outer diameter, the inner hole size is more than 10mm, and the accuracy is P0, P6, P5, P4, and P2. High enterprise standards At the same time, we can combine precision angular contact bearings, lathe spindle bearings, etc. according to the requirements of customers' application scenarios, and customize them professionally.