(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 10 of 10

Thread: Can't Get Diamond Cup Wheel Off Of Grinder

  1. #1
    DIY Member DavidSeon's Avatar
    Join Date
    Jul 2012
    Location
    MS Gulf Coast
    Posts
    47

    Red face Can't Get Diamond Cup Wheel Off Of Grinder

    I'm hoping this is close enough to a Shower & Tub question -

    I used a diamond cup wheel for the first time to remove adhesive residue on a concrete bathroom floor. It is a 4 1/2" double row spin-on DeWalt DW4774, so it doesn't use the backing flange, lock nut and wrench all my other wheels use. It worked like a charm but now I can't get the darn thing off!

    Is there a trick or a special tool for this? It seems like it's going to take a lot of leverage but I don't know whether to grab it by the holes or the segments or what. I hate to damage or unbalance it, they ain't cheap!

    Thanks for any help.

    Dave
    Old Retired Computer Programmer
    Obsolete and loving it

  2. #2
    Jack of all trades DonL's Avatar
    Join Date
    Mar 2011
    Location
    Houston, TX
    Posts
    3,652

    Default

    Maybe it has a Left-hand thread ?

    You can put it against a piece of wood to hold the blade.
    Theory only works perfect in a vacuum.

    Cyber Security Protection for Windows C:\ > WWW.WinForce.Net

  3. #3
    DIY Member DavidSeon's Avatar
    Join Date
    Jul 2012
    Location
    MS Gulf Coast
    Posts
    47

    Default

    Thanks, but I'm afraid it is right-handed. There are flats on the top of the wheel but there's not enough space between the wheel and the dust extraction shroud to get a wrench on it.
    Old Retired Computer Programmer
    Obsolete and loving it

  4. #4
    Retired Defense Industry Engineer jadnashua's Avatar
    Join Date
    Sep 2004
    Location
    New England
    Posts
    21,412

    Default

    On some, the shroud can be removed making access possible. Some grinders come with a custom wrench that has an offset in it, and it's thin enough to get to the flats. I've no idea where mine is, and if yours had one, you may not know either!

    If you can put a wrench on the cup anywhere, then use a mallet to give it a whack. Just make sure you're unloosening it!
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  5. #5
    DIY Member DavidSeon's Avatar
    Join Date
    Jul 2012
    Location
    MS Gulf Coast
    Posts
    47

    Default

    Preparations for hurricane Isaac have temporarily interrupted my project but I did double-check the exposed spindle threads with the grinder's lock nut, the threads are indeed right-handed. A section of the shroud is removable, but my wrench is the dual-pin type and the pins keep it from getting to the flats. I think you're right, I'm just going to have to whack it with something.

    Thanks for your reply.
    Dave
    Old Retired Computer Programmer
    Obsolete and loving it

  6. #6
    Retired Defense Industry Engineer jadnashua's Avatar
    Join Date
    Sep 2004
    Location
    New England
    Posts
    21,412

    Default

    You need a sharp impact to loosen it - something that is applied faster than the inertia of the motor shaft to get it to start to spin off. That's easier if you have a lever functionally making the cup larger in diameter (i.e., the wrench sticking out).
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  7. #7
    Jack of all trades DonL's Avatar
    Join Date
    Mar 2011
    Location
    Houston, TX
    Posts
    3,652

    Default

    It would be nice if they all had a shaft lock.
    Theory only works perfect in a vacuum.

    Cyber Security Protection for Windows C:\ > WWW.WinForce.Net

  8. #8
    ACO Shower Drain Sales johnfrwhipple's Avatar
    Join Date
    Jul 2009
    Location
    North Vancouver, BC
    Posts
    2,978
    Blog Entries
    5

    Default

    Quote Originally Posted by DavidSeon View Post
    ... I'm just going to have to whack it with something....
    OMG - I love it. Sometimes to only tool needed in the tool box is a really big hammer. Personally I'd whack it with my 2" Spanner.

    Before smashing it is it possible to put the cup wheel in a vice and then press the lock pin and twist the grinder? I have had hole saw bits stick on me that have never come off, and trust me they have been Whacked and Whacked.

    What about a little heat on the cup wheel?

    If it resorts to blows then make sure you hit it in the right spot. It is very hard to get leverage clamping to a round fitting.

    JW


    jfrwhipple@gmail.com - www-no-curb.com - 604 506 6792

    Always get construction advice double checked by your local city hall. Flood Test Every Shower - Every Time.

  9. #9
    DIY Member DavidSeon's Avatar
    Join Date
    Jul 2012
    Location
    MS Gulf Coast
    Posts
    47

    Default

    Whacked it with one of my special tools.

    Name:  Sledgehammer.jpg
Views: 106
Size:  6.6 KB

    Bosch suggested I use one of their wheels that are unthreaded and take the usual flange and lock nut. I suggested they send me a sample to test. He laughed.

    Oh well, probably not the last novice mistake I'll make. Thanks for the replies.
    Old Retired Computer Programmer
    Obsolete and loving it

  10. #10
    DIY Senior Member dlarrivee's Avatar
    Join Date
    Jun 2009
    Location
    Canada
    Posts
    1,172

    Default

    Just put some gloves on and put a little muscle into it. If you're having problems like this, maybe working with tools isn't for you.

Similar Threads

  1. Squeaky Wheel
    By BrianK in forum Joke of the day
    Replies: 14
    Last Post: 06-19-2012, 12:38 PM
  2. Presure Tank diamond/flotec
    By royerm in forum Pumps and Tanks Well Forum & Blog
    Replies: 1
    Last Post: 04-06-2011, 04:39 PM
  3. outdoor sump for fifth wheel trailer.
    By peterpilot in forum Toilet Forum discussions
    Replies: 2
    Last Post: 01-06-2009, 06:00 PM
  4. Delta Diamond Seal Technology
    By baflib in forum Remodel Forum & Blog
    Replies: 2
    Last Post: 08-17-2008, 05:55 PM
  5. york diamond 90 pilot not staying lit
    By fast pasquale in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 3
    Last Post: 02-14-2007, 07:05 PM

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
  •