Free 186 More Best Homemade Tools eBook:  
Get 2,000+ tool plans, full site access, and more.

User Tag List

Results 1 to 1 of 1

Thread: Milling machine spindle dual angular contact bearing preload adjustment advice

  1. #1
    Supporting Member metric_taper's Avatar
    Join Date
    Mar 2017
    Location
    Marion, Iowa
    Posts
    585
    Thanks
    227
    Thanked 257 Times in 153 Posts

    metric_taper's Tools

    Milling machine spindle dual angular contact bearing preload adjustment advice

    Answered----the bearings provide the preload via being machined to correct thickness. I hope I get a matched set that produces this outcome.

    _______________________
    Original post

    So my vertical mill is a Wells-Index model 645. I was making the first part (the swing arm) of Rossbotic's Dial indicator holder http://www.homemadetools.net/forum/d...tachment-60995.

    The spindle has had 'noise' issues for a long time. I was running the spindle at 750RPM, and taking 4 passes at a fairly slow feed rate (about 30 minutes run time). The grease in the spindle started smoking. And the quill was too hot to touch. So time for new bearings. I found them NOS.

    The quill/spindle has 2 nuts that hold the angular contact bearings. The outer clamps the the bearings in (outer races), and is threaded into, inside threads of the quill. The inner nut threads onto the spindle, and presses on the inner races, and preloads the bearing set.

    Milling machine spindle dual angular contact bearing preload adjustment advice-2017-06-05-mill-spindle.jpgSection drawing. The nuts are tightened with face pin spanner wrench, the drawing only shows one hole drilled in each nut for this.

    I'm thinking snug the inner nut, then give about 1/8 turn to preload.

    Steve

    186 More Best Homemade Tools eBook
    Last edited by metric_taper; Jun 8, 2017 at 08:16 PM.

Thread Information

Users Browsing this Thread

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

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
  •