Lets talk runnout

[johnnyc14]

(11-26-2015, 11:01 AM)PixMan Wrote: Also, what size range are these chucks and are they the "genuine article" made in USA (Jacobs) and Germany (Albrecht) chucks or the cheap knock-offs? Have you mounted the chucks on quality arbors or "import" quality ones?

Lastly, don't overthink this. If the drills being used were high performance solid carbide you need 0.0002" runout. With HSS jobber length drills, anything under .005" or so should be fine.

Those are all good considerations. I struggled to find a drill chuck that satisfied me. I bought this Llambrich with a built in R8 arbor because they promise less than .0006" run out. Even after I stupidly wrecked the first set of jaws and installed a replacement set it still meets their specs. I checked it with a piece of 3/8" drill rod in the chuck.





https://www.youtube.com/watch?v=ddEBrLhY...e=youtu.be