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  1. #1
    Join Date
    Apr 2020
    Location
    Ettalong Beach NSW
    Age
    60
    Posts
    72

    Default I found this in my lathe gearbox today.

    I can't for the life of me work out where it belongs. There doesn't appear to be any slack anywhere. The previous owner was using it ok. It's a Sheraton 10". Any thoughts?20200517_143055.jpg20200517_143119.jpg20200517_143218.jpg

  2. #2
    Join Date
    Sep 2012
    Location
    York, North Yorkshire UK
    Posts
    5,037

    Default

    Hi Vic,

    It looks like a broken thrust washer !

    At a guess it will have come from between a gear and the casting, probably at one end or the other of the spindle or main shaft.

    No too small to be the spindle !
    Best Regards:
    Baron J.

  3. #3
    Join Date
    Mar 2011
    Location
    Adelaide
    Posts
    952

    Default

    Doesn’t look broken to me, pretty common for thrust washers to come in two pieces. Not being familiar with Sheraton lathes I cant really help with where it goes other than suggesting that an exploded parts diagram will probably tell you.

  4. #4
    Join Date
    Apr 2020
    Location
    Ettalong Beach NSW
    Age
    60
    Posts
    72

    Default

    Thanks for that. Upon closer inspection, it does appear to be two pieces.

  5. #5
    Join Date
    Feb 2009
    Location
    jilliby nsw
    Age
    68
    Posts
    108

    Default

    Check for excessive end float in gears or shafts, might give you a clue where to look

  6. #6
    Join Date
    Apr 2020
    Location
    Ettalong Beach NSW
    Age
    60
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    72

    Default

    Thanks, I'll have another look

  7. #7
    Join Date
    Feb 2020
    Location
    Albury
    Age
    55
    Posts
    90

    Default

    Quote Originally Posted by racingtadpole View Post
    Doesn’t look broken to me, pretty common for thrust washers to come in two pieces.
    It somehow doesn't look right ... the two halves are not 180°, which makes no sense as one couldn't put the top half on a shaft since the opening is smaller than the shaft diameter.
    I have no experience with thrust washers that come in two pieces (never seen one), but I would think they come in two 180° halves to slot in either side of a shaft.

    Maybe it is a BROKEN thrust washer?

    A close up inspection/photo of the split are should clarify if it's a broken component.

  8. #8
    Join Date
    Sep 2012
    Location
    York, North Yorkshire UK
    Posts
    5,037

    Default

    Hi Guys,

    Yes definitely broken ! Look at where the anti rotation notch is. Its in the wrong place for a split thrust washer.
    Best Regards:
    Baron J.

  9. #9
    Join Date
    Mar 2011
    Location
    Adelaide
    Posts
    952

    Default

    May very well be broken just seems awfully symmetrical and unmangled to me though. Looks more like it wasn’t installed properly and fell out to me.

  10. #10
    Join Date
    Sep 2012
    Location
    York, North Yorkshire UK
    Posts
    5,037

    Default

    Hi Guys,

    No if you look carefully you can see the rub marks where something has been running against it !
    Best Regards:
    Baron J.

  11. #11
    Join Date
    Apr 2020
    Location
    Ettalong Beach NSW
    Age
    60
    Posts
    72

    Default

    I'll get a macro shot of it this week and report back.
    And I figure it's the head stock and not the gearbox.
    I managed to get a parts diagram and will have a good look at it this week.
    Thanks for your assistance everyone.

  12. #12
    Join Date
    Apr 2020
    Location
    Ettalong Beach NSW
    Age
    60
    Posts
    72

    Default

    Looks broken.washer1.jpgwasher2.jpg

  13. #13
    Join Date
    Feb 2020
    Location
    Albury
    Age
    55
    Posts
    90

    Default

    Quote Originally Posted by Vicval01 View Post
    Looks broken.
    The only remaining questions now are
    - where does it belong
    - why did it break

  14. #14
    Join Date
    Apr 2020
    Location
    Ettalong Beach NSW
    Age
    60
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    Default

    I've been looking at a parts diagram and cannot identify where it belongs. I'll have to return to the headstock this week and have a thorough inspection. Even if I do locate it, any thoughts on how to get a replacement, and what is required to replace it?

  15. #15
    Join Date
    Nov 2017
    Location
    Geelong, Australia
    Age
    55
    Posts
    1,842

    Default

    Quote Originally Posted by Vicval01 View Post
    I've been looking at a parts diagram and cannot identify where it belongs. I'll have to return to the headstock this week and have a thorough inspection. Even if I do locate it, any thoughts on how to get a replacement, and what is required to replace it?
    Unless they are available off the shelf, you're probably going to be making one out of bronze I'd say.
    I'm not familiar with that lathe, but unless its on the layshaft and you can remove a supporting shaft from the middle and slip it in, then you're going to be up for some serious disassembly.

    Its always possible that its just a leftover from a previous adventure in the headstock, and has actually been replaced but the person forgot, didn't notice, or didn't bother to remove it. Eg broken on removal and not noticed, not visible in the remaining dirty oil at the bottom of the headstock and the play was found/fixed by another method.
    I'd be taking the approach of inspecting it all, but IIABDFI.....

    Steve

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