Free 186 More Best Homemade Tools eBook:  
Get tool plans

User Tag List

Results 1 to 2 of 2

Thread: Mini Lathe 5 inch 6 jaw adjust able chuck Lower your runout

  1. #1
    Supporting Member jjr2001's Avatar
    Join Date
    Jun 2016
    Posts
    915
    Thanks
    1,182
    Thanked 2,070 Times in 554 Posts

    jjr2001's Tools

    Mini Lathe 5 inch 6 jaw adjust able chuck Lower your runout

    I made this mod on my little 3" 3 Jaw chuck before doing this to my 5" 6 Jaw.
    The 3 inch runs with less than .001 TIR. The 5" is just a good after the mod.
    The key is to have a small amount of clearance on the chuck back plate register at the chuck side.
    By carefully drilling a .106 or #36 drill at each jaw and tapping for 6-32 set screws at the very back of the chuck. Just be careful to not put the hole too far back or too forward. It needs to be just right to miss the back of the recess in the chuck and not break out the back of the chuck.

    Once that is done you can start to breathe normally again! I re-assemble the chuck to the back plate on the lathe and snug up the set screws. My chuck uses 3 hex bolts to attach to the back plate so I keep them snug and position the chuck with a hardened dowel pin (1") in the chuck and indicate that until true. Keep tightening/tapping and snugging/loosing until it runs as true as possible and your 3 main bolts are tight.

    I am sure this is not as good as an Adjust-True Buck Chuck. However it gets the job done for me and it did not cost $500.

    Cheers, JR
    Attached Thumbnails Attached Thumbnails Mini Lathe 5 inch 6 jaw adjust able chuck Lower your runout-dscf0019.jpg   Mini Lathe 5 inch 6 jaw adjust able chuck Lower your runout-dscf0020.jpg  

    186 More Best Homemade Tools eBook

  2. The Following 3 Users Say Thank You to jjr2001 For This Useful Post:

    Jon (Aug 31, 2016), Paul Jones (Aug 31, 2016), PJs (Aug 31, 2016)

  3. #2
    Content Editor
    Supporting Member
    DIYer's Avatar
    Join Date
    Aug 2013
    Posts
    3,055
    Thanks
    791
    Thanked 1,880 Times in 1,677 Posts


    Thanks jjr2001! We've added your Chuck Runout Adjustment Method to our Machining category,
    as well as to your builder page: jjr2001's Homemade Tools. Your receipt:




    2,000+ Tool Plans

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •