How to reduce the runout of the inner taper in the spindle to 1 micron скачать в хорошем качестве

How to reduce the runout of the inner taper in the spindle to 1 micron

t is shown to reduce the runout of the cone in the spindle of the Schaublin SV-90 lathe. This machine has two seating surfaces inside the spindle: a cylindrical hole with a diameter of 20 mm with a tolerance of plus 5 microns and a 30 ° taper at the edge of the spindle. I invite you to watch other videos on my channel in playlists Lathe MN-80. Modernization":    • Токарный станок МН-80. Модернизация   “Machine tools. Repair and improvements. Modernization":    • Станки. Ремонт и доработки. Модернизация   "Unusual work on machine tools":    • Необычные работы на станках   I invite you to my channel: https://www.youtube.com/my_videos?ar=... Address of this video:    • Как УМЕНЬШИТЬ БИЕНИЕ внутреннего КОНУ...   I measured the beating of a cylindrical hole with an indicator, the beating turned out to be 1 micron, which is very good. But if the runout was large, I most likely would not eliminate it, since this would increase the inner diameter and the centering of the collet shanks would deteriorate. Measured the runout of the cone in the spindle. Got a beat of 10 microns. On the MN-80 lathe, I have already reduced the beating of the cone in the spindle from 1 hundred parts to 1 micron. Just sanded off the taper on one side on a non-rotating taper:    • Токарный станок МН-80. Как  УМЕНЬШИТЬ...   I decided to do it on the Schaublin machine in the same way. Shown how I do it. Marked with a marker the place on the spindle with the greatest runout. I take a 600 grit sandpaper and wrap it around a round wooden frame. I begin to grind the surface of the cone in the place where the runout is greatest. I constantly check the beating of the indicator. Got a beat of 2-3 microns. I decided to do even less. I measure the beating in three belts: on a small diameter, on an average and on a large one, that is, along the entire length of the cone. To speed up, I replaced the sandpaper 600 with 320. And now I wrap the skin around the wooden handle of the brush and remove the metal not along the entire length of the cone, but in place. Achieved that now the beating of the cone is equal to 1 micron - half of the division value on the indicator with a division value of 2 microns. This is how I reduced the taper runout in the spindle of the Schaublin SV-90 lathe to 1 micron.