Re: Drill chuck runout

"Snag"  wrote in message news:vtkdn6$2jbtb$1@dont-email.me...
Mounting a drill chuck in the lathe came up , so I put one of mine in
the lathe . My spindle is 3MT and the chuck tang is 2MT so an adapter
sleeve was used . This is just "a chuck" , nothing special . Runout at
the chuck was .003 TIR , at 12 inches from the chuck it was .012" . The
rod stock I used was a piece of 1/2" O1 drill rod . The rod is over 24"
long , but I did not consider sag to be a factor in the measurement I
was doing .
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Snag
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For me the advantage of a drill chuck is being relatively hand-safe on mostly finished work that no longer fits a collet. Hand operations like filing sharp corners round aren't precise and the file or sandpaper can follow any runout. It's a good use for my AA lathe which is nearly useless for turning steel and small enough to disassemble to clean off abrasive dust.