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The Water Cooler
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Any machinists on here?
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<blockquote data-quote="JxxxOxxxE" data-source="post: 2065515" data-attributes="member: 388"><p>Basically I acquired a free lathe a couple years ago. I've done some repairs to it and used it off and on for random projects that had no real tolerances. I now have the need for some real accuracy. </p><p></p><p>I replaced the spindle bearings in it as they were pitted very bad which showed when trying to finish a part. </p><p></p><p></p><p>What has happened is that someone sometime before me tried to true the D1-6 spindle and nose taper up with the old worn out bearings...This has made the runout on the chuck quite bad</p><p></p><p></p><p>You can tell in these 2 pics that someone has attempted to bevel the front edge of the nose taper rather crudely. Its completely uneven and I could probably be more consistent with a electric grinder...</p><p></p><p><strong>[Broken External Image]</strong></p><p></p><p></p><p><strong>[Broken External Image]</strong></p><p></p><p></p><p>Here are 2 short videos showing the measurements</p><p></p><p><a href="http://www.youtube.com/watch?v=FwIudpVMCDg" target="_blank">http://www.youtube.com/watch?v=FwIudpVMCDg</a></p><p></p><p><a href="http://www.youtube.com/watch?v=mHHj32RWYbg" target="_blank">http://www.youtube.com/watch?v=mHHj32RWYbg</a></p><p></p><p></p><p>From some reading on some of the national machinist sites, it seems like I need the use of a tool post grinder to grind the spindle face back true, and re grind the taper to the correct dimensions...I'm afraid getting the taper correct may be above my current skill level...</p></blockquote><p></p>
[QUOTE="JxxxOxxxE, post: 2065515, member: 388"] Basically I acquired a free lathe a couple years ago. I've done some repairs to it and used it off and on for random projects that had no real tolerances. I now have the need for some real accuracy. I replaced the spindle bearings in it as they were pitted very bad which showed when trying to finish a part. What has happened is that someone sometime before me tried to true the D1-6 spindle and nose taper up with the old worn out bearings...This has made the runout on the chuck quite bad You can tell in these 2 pics that someone has attempted to bevel the front edge of the nose taper rather crudely. Its completely uneven and I could probably be more consistent with a electric grinder... [b][Broken External Image][/b] [b][Broken External Image][/b] Here are 2 short videos showing the measurements [url]http://www.youtube.com/watch?v=FwIudpVMCDg[/url] [url]http://www.youtube.com/watch?v=mHHj32RWYbg[/url] From some reading on some of the national machinist sites, it seems like I need the use of a tool post grinder to grind the spindle face back true, and re grind the taper to the correct dimensions...I'm afraid getting the taper correct may be above my current skill level... [/QUOTE]
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