Free 173 Best Homemade Tools eBook:  
Remove advertisements
Results 1 to 2 of 2

Thread: Expanding Arbors

  1. #1
    Toolmaker51's Avatar
    Join Date
    Feb 2016
    Location
    Midwest USA
    Posts
    1,138
    Thanks
    2,408
    Thanked 1,141 Times in 650 Posts

    Toolmaker51's Tools

    Expanding Arbors

    Recently had to face several spur gears, removing near all of hub.
    Instead of boring a sleeve to grip OD of gear, chose to create an arbor. Very simple to make, long as ID to grip is consistent in each part. Also somewhat less labor intensive to run a batch of same parts, compared to a sleeve.
    Expanding Arbors-expanding-arbor.jpg
    Select a short piece of stock that will protrude enough for intended item, and allow wrench access to back side.
    Rough turn .02-.05 over finish diameter. Allow clearance at inner corner, so face will register successive parts.
    Clearance drill through for drawbolt.
    Bore a taper about 11° included angle. Not counterbore, should not be a seat for face of capscrew.
    At same angled compound setting, turn off head of capscrew, eliminating shoulder.
    Saw cut through diameter 2-4 times into the solid section that chuck will hold. You'll notice 4 shallow center-drilled spots; they indicate same orientation as master pinion of chuck. I'm picky about relocating as originally made.
    I don't tap the arbor; 1] small taps aren't long enough, 2] used enough, the thread wears out, 3] allen wrench and open end torque up tighter with out having to hold chuck, lock spindle or use foot brake. Fine threads work best, didn't have one suitable.
    Re-chuck, snug up screw and nut minimally and finish OD.
    Arbor is ready for use.
    Sincerely,
    Toolmaker51
    ...we'll learn more by wandering than searching...

  2. The Following 9 Users Say Thank You to Toolmaker51 For This Useful Post:

    bobs409 (05-24-2018), Frank S (05-08-2018), Jon (05-07-2018), NortonDommi (05-08-2018), Papa Bill (09-11-2018), philipUsesWood&Brass (09-12-2018), PJs (05-08-2018), rossbotics (05-09-2018), Seedtick (05-07-2018)

  3. #2
    Content Editor DIYer's Avatar
    Join Date
    Aug 2013
    Posts
    3,087
    Thanks
    339
    Thanked 667 Times in 605 Posts


    Thanks Toolmaker51! We've added your Expanding Arbor to our Machining category,
    as well as to your builder page: Toolmaker51's Homemade Tools. Your receipt:





    Post your reply!
    Join 33,912 of us and get our 173 Must Read Homemade Tools eBook free.



    173 Must Read Homemade Tools

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
  •