Eagle Mk3 surface grinder rebuild

  1. Shox Dr

    Shox Dr Chief Engineer to Carlos Fandango

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    How do other machines balance the wheel, Pete
     
  2. awemawson Forum Supporter

    Usually the wheel mounts onto a separate hub, that has weights that can be slid round a circular Tee slot and locked
     
    Pete. likes this.
  3. Shox Dr

    Shox Dr Chief Engineer to Carlos Fandango

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    I know what you mean now
     
  4. Pete.

    Pete. Member

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    That's right, usually the wheel clamps in a hub which sits on a taper or keyed shaft. The Eagle has a 2-piece hub that's a more posh version of the plates on a bench grinder just clamped by the nut on the front.
     
    mtt.tr likes this.
  5. Shox Dr

    Shox Dr Chief Engineer to Carlos Fandango

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    Is that because it would usually be set up with one wheel?
    Where as a tool cutter grinder would require different shaped wheels, different wheels on hubs would saving having to rebalance every time?
     
  6. Pete.

    Pete. Member

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    No, surface grinders have a selection of wheels too, it's just that the Eagle is at the more basic end of the scale.
     
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  7. Laurie Tedcastle Member

    Messages:
    37
    Location:
    NW Northants (UK)
    @pete,

    Unfortunately I'm not familiar with the Eagle and you haven't shown a photo
    of the spindle and wheel and flange(s) separated off the machine.

    Many articles and letters in magazines such as ME and MEW lament the poor
    location of grinding wheels on bench grinders particularly when pressed metal
    flanges are employed. In MEW there are articles about improving this and also
    balancing said wheels.

    I have 2 bench grinders and have made dedicated hubs for mounting the wheels
    with provision for balancing. These wheels are normally fitted with plastic
    bushes, so with these removed there is room for my dedicated hubs. I suspect
    my machining capability is somewhat less than yours, but after balancing I can
    stand a £1 coin on edge on the machine with it running. I need to sort out a
    decent dressing mechanism.

    8" grinding wheel with dedicated hub and balancing "ears". The ears are cut
    from 1mm sheet steel and rotated to provide balance.

    [​IMG]

    The simple balancing jig. The "knife edges" aren't quite - I cheated and cut
    a cheap thin steel rule in half! Three screws for levelling & I use the level
    from my M&W combination square set to set it up.

    [​IMG]

    A wheel in position and reasonably balanced - well it hasn't rolled against the stops.

    blob.jpg blob.jpg

    Perhaps you could do something similar although you might need to find a wheel
    with a larger bore.

    Laurie
     
    • blob.jpg
    • blob.jpg
  8. Pete.

    Pete. Member

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    Location:
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    Hi Laurie,

    I've done similar with my bench grinder - not made balancing hubs like yours but I have made thicker plates with hubs to locate the wheels properly, and they do run a lot smoother than using those horrible pressed plates. I use surface grinder wheels on my bench grinders.

    Thanks for showing your balancing jig. It's kinda similar design to the Jones and Shimpan
     
  9. Pete.

    Pete. Member

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    Well, I'm calling this done. I do have to fit a tall end guard and one day I'll get around to hooking up coolant but for the time being I'm very satisfied with how it's come out. I wheeled it outside for some daylight pics.

    Eagle grinder finished 1.jpg

    Eagle grinder finished 2.jpg

    Funny that Rob Cox and I both finished our rebuilds of the same machine on the same day!
     
  10. Parm

    Parm Let The Games Commence

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    That's a work of art Pete
     
  11. Pete.

    Pete. Member

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    Thanks mate. Bit of a difference eh?

    eagle stripping for transport.jpg
     
    slim_boy_fat, Shox Dr and Parm like this.
  12. Parm

    Parm Let The Games Commence

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    It sure is. It’s just too nice to get dirty in use
     
    RobCox likes this.
  13. Seadog

    Seadog Forum Supporter

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    That is a thing of beauty.
     
  14. Windy Miller Semi-Professional Potterer!

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    North Kent, UK
    That is the absolute Dogs! Spectacular work Pete!
     
  15. scottmk1

    scottmk1 Forum Supporter

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    Great result Pete, you wouldn't think it's the same machine in the before and after pics.
     
  16. jenki Forum Supporter

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    First class work Pete and a big thank you for posting the info.
     
  17. mtt.tr

    mtt.tr Member

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    Essex England
    Looks good, amuses me that 3 of in similar time frame ended up with these
     
  18. Shox Dr

    Shox Dr Chief Engineer to Carlos Fandango

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    Nice rebuild Pete, that sure did look sorry for itself before hand. And better than brand new now
     
  19. Welderpaul

    Welderpaul Moderator Staff Member

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    Location:
    Yorkshire
    Nice job Pete, a credit to your patience and detail. Good that you've done a 'proper' refurb on it and not just sloshed 1/2 gallon of paint over it and sticking it on ebay like so many chancers do.
     
  20. awemawson Forum Supporter

    And so often they leave the equipment on the same pallet that they sprayed it on as a total give away !
     
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