My gap has a crack!

  1. fizzy Forum Supporter

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    Fortunately not all the way through.
    Hope it doesn't get worse.
    Before and after citric acid. Only just fitted the mop bucket. Flipping heavy!

    20191217_232028.jpg 20191222_190323.jpg
     
  2. spencer 427

    spencer 427 Member

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    What's it like underneath
     
  3. spencer 427

    spencer 427 Member

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    You sure it's a crack and not a casting defect
     
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  4. Screwdriver

    Screwdriver Member

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    Doesn't look like a crack. I think that's a casting flaw. Just a seam from the mold...
     
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  5. Screwdriver

    Screwdriver Member

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    Haha. You beat me by a "moment". :D
     
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  6. fizzy Forum Supporter

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    I suspect it is a casting mark. Would have been hidden by paint of course.
     
  7. brightspark

    brightspark Member

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    wouldn't worry about it 2 much its not in a position to affect the machines performance if it did split it would be easy to drill through the side tap it and a couple of bolts through
     
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  8. fizzy Forum Supporter

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    Picture of underside. Mark runs opposite way!
    How do I polish the ways to get them shiny? 20191224_190320.jpg
     
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  9. brightspark

    brightspark Member

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    I just rub mine up with scotch pad and duck oil then clean off with celly thinners then oil them . just been getting surface rust of my lathe this aftie :(
     
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  10. fizzy Forum Supporter

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    At the moment it has the dull grey cast iron look and yet the ways on the main bed are lovely and shiny.
     
  11. spencer 427

    spencer 427 Member

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    Thsts the method I use to.
     
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  12. Brad93

    Brad93 M J B Engineering

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    Start with wire wool it’s kinder.

    If the rust is real bad then use the scotchbrite
     
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  13. Screwdriver

    Screwdriver Member

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    I wouldn't touch it off the machine. Polish it in place by all means but those things should be matched within tenths if not hundredths of a thou. If there is the slightest step at all, it will show up on the workpiece.
     
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  14. fizzy Forum Supporter

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    I have used wire wool. It won't polish though. Proper cast iron surface. Rub your finger on it you get a black greasy mark. Even after a hot caustic bath.
     
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  15. Screwdriver

    Screwdriver Member

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    Are the ways not hardened? I would be wary of doing anything to it at all separate from the main bed.

    <edit> zoiks! hot caustic. Hope it hasn't twisted or distorted.
     
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  16. fizzy Forum Supporter

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    Hand hot!
    Main ways are induction hardened but not sure about the gap
     
  17. indy4x

    indy4x Forum Supporter

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    Having removed the gap piece on my Harrison I can confirm it was an interesting exercise getting it to line up once back on the lathe
     
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  18. spencer 427

    spencer 427 Member

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    You could polish that for an hour it wouldn't do **** all to its alignment.
     
  19. brightspark

    brightspark Member

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    remember at college the technician wasn't to happy about having to remove the gap bed and put it back in
     
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  20. spencer 427

    spencer 427 Member

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    I appreciate they an be bit of a pain to remove but only if ya lathe isn't level. If they are such a delicate part to mess with then manufacturers wouldn't of put em there in the first place
     
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