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Thread: jet 1642 bearings

  1. #1
    Join Date
    Mar 2011
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    Gulf Coast MS
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    8

    jet 1642 bearings

    I just changed he bearings on my 1642. I did it because you could grab the end of the shaft and physically move it to make a clunk. I changed the bearings to the Japanese sealed bearings. All went well. Unless I tighten the jam nut very tight I still get the clunk. Does this mean I need a new wave washer. Also the front bearing seems to get hot. When I put in a drive center it is very warm to the touch when I take it out. I would appreciate any help from anyone who has changed the bearings in a Jet 1642.
    Thanks

    PS: Took it apart again this morning. I seem to be running out of threads with the jam nut. hmmm.
    Too bad I don't have a service station near here.

  2. #2
    Join Date
    Feb 2008
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    S E Washington State
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    3,777
    I can't answer but this may help, I don't know.

    http://www.sawmillcreek.org/showthre...t-1642-Bearing
    "We the People ......"

  3. #3
    Join Date
    Feb 2007
    Location
    North West Indiana
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    6,097
    Quote Originally Posted by Larry Matchett View Post
    I just changed he bearings on my 1642. I did it because you could grab the end of the shaft and physically move it to make a clunk. I changed the bearings to the Japanese sealed bearings. All went well. Unless I tighten the jam nut very tight I still get the clunk. Does this mean I need a new wave washer. Also the front bearing seems to get hot. When I put in a drive center it is very warm to the touch when I take it out. I would appreciate any help from anyone who has changed the bearings in a Jet 1642.
    Thanks

    PS: Took it apart again this morning. I seem to be running out of threads with the jam nut. hmmm.
    Too bad I don't have a service station near here.
    All nomenclature is coming from this source: http://www.ereplacementparts.com/jet...54_155051.html

    I will assume you are talking about the tailstock. The clunk you refer to could be happening because your handwheel is not moved far enough forward on your lead screw which screws into your quill. So, loosen the tailstock quill handle, slide the quill (which slides the lead screw) back as far as you can (maybe even make the clunk sound). Then tighten your tailstock quill handle and check the distance between your handwheel and tailstock. If there is a gap, loosen the allen screws on your handwheel and slide it forward on the lead screw. This will take up the slop and should reduce the clunk sound.

    The heat you mention I assume is now at the headstock. You are turning between centers using a spur drive? If so, is it fitting correctly or not slipping on the inside creating heat from friction? Are you grossly overtightening your tailstock causing your bearing to push against the headstock and creating friction?
    Jon

    God and family, the rest is icing on the cake. I'm so far behind, I think I'm in first place!

    Host of the 2015 FAMILY WOODWORKING GATHERING

  4. #4
    Join Date
    Oct 2006
    Location
    ABQ NM
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    30,002
    Quote Originally Posted by Jonathan Shively View Post
    ...I will assume you are talking about the tailstock...
    Jon, I'm pretty sure Larry's talking about changing main bearings in the headstock. That's where the jam nut and wave washer are.
    When the going gets weird, the weird turn pro. - Hunter S. Thompson
    When the weird get going, they start their own forum. - Vaughn McMillan

    workingwoods.com

  5. #5
    Join Date
    Feb 2007
    Location
    North West Indiana
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    Quote Originally Posted by Vaughn McMillan View Post
    Jon, I'm pretty sure Larry's talking about changing main bearings in the headstock. That's where the jam nut and wave washer are.
    Sorry, Vaughn is 100% correct, on the schematic I provided as a link, second page B-9 is the wave washer. Well, just disregard all of my advice, shows you get what you pay for!!
    Jon

    God and family, the rest is icing on the cake. I'm so far behind, I think I'm in first place!

    Host of the 2015 FAMILY WOODWORKING GATHERING

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