How to remove this milling machine saddle?

[Sonic EscapeParticipant @sonicescape38234]

I want to clean the X axis ways and lead screw of a FUS250 (Thiel 158 clone)  milling machine. For this I want to remove the saddle. I removed first the worktable

Now I have access to the saddle. I disconnected the lead screw from the saddle at the handwheel end:

Now I was expecting to be able to push the saddle by hand. But it doesn’t move! I don’t understand why. How is this machine working? I thought there should be some kind of nut for the lead screw in the main body. And a gear that slides along the lead screw for power feed (it has an axial groove). Why the saddle doesn’t move after I disconnected it from the lead screw?

This is the only drawing I have for this part of the machine. But I don’t see the nut. And why the left end of the lead screw has some kind of clutch? I’m running out of ideas.

 

 

 

[Pete RimmerParticipant @peterimmer30576]

My FN22 is the same type of design. That part is called the console table. On mine, you remove the traverse handles and the two end plates then the table slides off. The ‘nut’ is in the end of the z slide housing.

If your table was sliding with the handwheel but now is not, then it’s probably just sticktion in the ways. Remove the gib amd just bump the table upwards with a rubber mallet. Squirt some oil in there and it will glide right off. This sticktion is the reason we put oil flaking on the ways. It breaks up the surface and allows space of roil to accumulate.

[Pete Rimmer]

On Pete Rimmer Said:

My FN22 is the same type of design. That part is called the console table. On mine, you remove the traverse handles and the two end plates then the table slides off. The ‘nut’ is in the end of the z slide housing.

If your table was sliding with the handwheel but now is not, then it’s probably just sticktion in the ways. Remove the gib amd just bump the table upwards with a rubber mallet. Squirt some oil in there and it will glide right off. This sticktion is the reason we put oil flaking on the ways. It breaks up the surface and allows space of roil to accumulate.

Yes, it was the gib! I removed completely the two screws at both ends and now I can push the console table by hand. After I’ll clean the ways I’ll use same oil from my lathe. It is a special way oil and it is suppose to help with sticktion.

 

[Sonic Escape]

On Sonic Escape Said:

<p class=”bsp-quote-title”>.. This sticktion is the reason we put oil flaking on the ways. It breaks up the surface and allows space of roil to accumulate.</p>

… It is a special way oil and it is suppose to help with sticktion.

 

Sticktion means to me the initial high resistance to motion that disappears once sliding has started.   Can be caused by metal to metal contact squeezing the oil out when the slide is stopped, by dirt or gummed up oil, or by an excessively heavy oil.   Physical damage possible too, are the gibs scuffed?

May be completely wrong, but I don’t think Way Oil is good for the gibs.   Way Oil is sticky, which is wanted on ways because the oil resists being squeegeed off when the machine moves, but I think gibs would benefit from a less viscous oil.   Anyone know for sure?

Dave

 

 

[mgnbukParticipant @mgnbuk]

May be completely wrong, but I don’t think Way Oil is good for the gibs.

Gibs = part of the slideways, so slideway oil is what they want. The gibs are there to allow the clearance in the slideway to be adjusted – why would one side of a slideway be OK with slideway oil & the opposite side require soemthing different ?

The tackifiers added to slideway oils are there to try to stop the oil running off the surfaces, particularly vertical surfaces.

Nigel B.

[Nicholas FarrParticipant @nicholasfarr14254]

Hi, all you need to know about stiction.

https://www.google.co.uk/search?q=stiction+meaning&sca_esv=9219e036947ce0fe&sxsrf=ADLYWILJEC56iYh7AXN7i0YbpUY_pT_XtA%3A1717074249373&source=hp&ei=SXlYZs_GFIO9hbIPzpWEsAg&iflsig=AL9hbdgAAAAAZliHWT-E5qRTf5Y4tPSL9biuEITcsRdK&oq=sticktion+&gs_lp=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&sclient=gws-wiz

Regards Nick.

P.S. I don’t know how or if we can make links smaller, like we used too on the old forum.

[mgnbukParticipant @mgnbuk]

P.S. I don’t know how or if we can make links smaller, like we used too on the old forum.

When you press the “link” icon & it opens the small box for the link, rather than entering the link press the gear wheel symbol on the right hand side. This expands the link box to include a box where you can enter the word(s) that you want to appear in the message text rather than have the full link displayed as your post above.

Hope the above makes sense !

Nigel B.

 

[Nicholas FarrParticipant @nicholasfarr14254]

Hi Nigel B, thanks, I’ll try that next time.

Regards Nick.

[Grindstone CowboyParticipant @grindstonecowboy]

I usually do links by writing the word I want to appear as a link, highlighting it, then clicking the chain icon. Paste the actual URL into the box that appears and press return.

Just seems simpler that way. Also paste the actual link below my signature so people can see where it goes to.

Rob

[Sonic EscapeParticipant @sonicescape38234]

This is the oil I was referring to. Since it is suppose to have “very good anti-stick slip properties” I thought it should be ideal for this. Also being sticky will prevent it from leaking all over the machine.

But I had a look in the manual and surprise, there is mentioned what oil to use. My oil has viscosity 68mm²/s at 40°C. And the manual recommend 12.8E. But what is E? If it means mm²/s then I’m way off!

 

[mgnbukParticipant @mgnbuk]

But what is E?

Engler viscosity units. Conversion table here.

HTH

Nigel B.

[Sonic EscapeParticipant @sonicescape38234]

12.8°E = 97mm²/s. The closest ISO oil is 100. So my oil was actually to thin!

[Pete RimmerParticipant @peterimmer30576]

I use ISO60 slideway oil on the vertical ways.

S.O.D gibs and ways are the same thing in respect of lubrication. A gib is just a slideway that has movement to adjust for clearance.

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