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17th May 2020, 04:56 PM #1Member
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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
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17th May 2020, 06:43 PM #2
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.
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17th May 2020, 07:07 PM #3Most Valued Member
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- Mar 2011
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- Southern Flinders Ranges
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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.
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17th May 2020, 09:28 PM #4Member
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Thanks for that. Upon closer inspection, it does appear to be two pieces.
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17th May 2020, 11:18 PM #5Senior Member
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- Feb 2009
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- jilliby nsw
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Check for excessive end float in gears or shafts, might give you a clue where to look
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18th May 2020, 04:21 AM #6Member
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Thanks, I'll have another look
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18th May 2020, 10:39 AM #7Member
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- Feb 2020
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- Albury
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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.
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18th May 2020, 06:15 PM #8
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.
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18th May 2020, 06:19 PM #9Most Valued Member
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- Mar 2011
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- Southern Flinders Ranges
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- 1,554
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.
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18th May 2020, 06:27 PM #10
Hi Guys,
No if you look carefully you can see the rub marks where something has been running against it !Best Regards:
Baron J.
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18th May 2020, 07:52 PM #11Member
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- Apr 2020
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- Ettalong Beach NSW
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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.
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19th May 2020, 12:22 PM #12Member
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- Apr 2020
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- Ettalong Beach NSW
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- 62
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- 72
Looks broken.washer1.jpgwasher2.jpg
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19th May 2020, 01:55 PM #13Member
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- Albury
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19th May 2020, 02:02 PM #14Member
- Join Date
- Apr 2020
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- Ettalong Beach NSW
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- 62
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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?
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19th May 2020, 02:42 PM #15Most Valued Member
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- Nov 2017
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- Geelong, Australia
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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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