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Fly press screw removal?

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I've bought a small fly press and have stripped it for cleaning except I can't see how you remove the shaft and nuts from the bottom of the screw. On one diagram I've seen it seems the shaft is pinned to the screw but I can't see any fixings on mine at all?! Any ideas how it's fixed? Without removing the shaft and adjusting nuts I can't withdraw the screw from the body for cleaning and lubricating.

What's the best lubricant for the Screw and Ram, Oil or Grease?

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Most have a collar that is cross pinned - pics would help us to help you.

 

I use Mobil Vactra way oil for screw and dovetail as it tends to stay put a bit better than other oils but I suppose there is no harm in using a good quality grease.

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I'll take some pics once it's indoors. I was thinking Moly grease might be good for the screw? The ram area has slots for oil? so I guess the vactra would be good for that. I have vactra way oil as I use it on my Mill and Lathe.

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Thanks very much Andrew. When I first looked at your pictures I thought I still had trouble as mine has a lock nut as well. Once removed though the threaded gland fell apart allowing me to remove the thread!

Can I ask what lube you used on yours when you rebuilt it?

Vic.

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Here are some pictures in case it helps anyone else:

Stripped.

IMGP1804_zps2970853e.jpg

Close up of split collar, nut etc.

IMGP1805_zps1c7dc959.jpg

Three quarter view.

IMGP1806_zps75116cb6.jpg

Thanks again for you help Andrew!

When I removed the Ram the hole in the top was full of clean oil. I expect it's supposed to be in there? Should I re-fill with oil on assembly? Sorry for so many questions but there's no owners manual with it! ;-)

Update: All back together now. I used way oil in the end.

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I'm no expert, but most oils are better than none.  If you keep it oily, probably throw a cover over it to keep dust off.

Just enough oil in the tup hole to lube things i 'spose .

A.

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I think way oil is what would be best. I don't have much access to way oil and it is expensive so I have used bar and chain oil for a chain saw whick has some of the same characteristics. I use it on mu LG power hammer as well.

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I remember being told that grease is the very last thing to use on these machines as dust & debris gets trapped in the grease & it all becomes abrasive. Always use oil was the mantra.

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I remember being told that grease is the very last thing to use on these machines as dust & debris gets trapped in the grease & it all becomes abrasive. Always use oil was the mantra.

Thanks for that tip...

 

I've recently purchased a fly press and have stripped it completely down and have noticed the old grease is a kind of a gritty paste. I'll not go with grease for the rebuild but opt for a good heavy oil that'll keep the threads in good order. 

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When removing split collars always examine them and the shaft for dimples or other identification marks.  the identifiers are there for reassembly to the correct side of the shaft.

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