New kind of metal vise.

[Frank S]

Vise Frank S refers to is likely a "Cardinal Speed-Vise" With half nut about 3 or 4 diameters long, heat treated, and screwed to base casting.
I doubt one would strip under load like Tuomas's vise. And if it did, make a couple spares beforehand.

Yes that is exactly the vice I had, here is some pictures of one just like mine

[Toolmaker51]

Yep, that's the guy. I recall the nut longer, but maybe there was a selection. These were spawned by the aircraft industry to enhance production, Gardena CA. Parts are still available, but didn't find who holds the rights.

[Tuomas]

Yes that is exactly the vice I had, here is some pictures of one just like mine

I didn't meant to be rude in my previous answer.
Its hard to find right words sometimes when things are said different way in my culture.

Like this vise that you posted.
Its the trheaded rod that moves, and if you don't lift it with your hand, it leans to half nut.
That would have been unwanted feature when used with a jack.

I designed mine, so that threads move inside outer "slide" and stays secured from wearing out / leaning against any surface when vise is converted to be used with a hydraulic jack. That kind of vise is great in drill press etc, but maybe not optimal design when making a vise with bigger/higher jaws?

[Toolmaker51]

Not to worry; certain neither of us take issue.
The instantaneous feature of web responses means we can armchair engineer nearly as quickly. The cultural aspect, in either direction, is flexible.
Speaking of translations, I'm still trying to perfect your incredible dexterity with cutoff wheels that I struggle duplicating with a big bandsaw.

[Frank S]

I didn't meant to be rude in my previous answer.
Its hard to find right words sometimes when things are said different way in my culture.

Like this vise that you posted.
Its the trheaded rod that moves, and if you don't lift it with your hand, it leans to half nut.
That would have been unwanted feature when used with a jack.

I designed mine, so that threads move inside outer "slide" and stays secured from wearing out / leaning against any surface when vise is converted to be used with a hydraulic jack. That kind of vise is great in drill press etc, but maybe not optimal design when making a vise with bigger/higher jaws?

Yes I understand how your design worked for the quick vice feature by clamping both sides of the slide.
What I was thinking of would have been an opening and closing half nut design where the 2 halves move in to close and out to open then the lead screw would function just as yours does. However there might be a downside to a system like the one I mentioned, that being slots may have been needed in both sides of the slide thereby weakening the vice or causing the design to need altering to reduce any weakening.

[Tuomas]

Yes I understand how your design worked for the quick vice feature by clamping both sides of the slide.
What I was thinking of would have been an opening and closing half nut design where the 2 halves move in to close and out to open then the lead screw would function just as yours does. However there might be a downside to a system like the one I mentioned, that being slots may have been needed in both sides of the slide thereby weakening the vice or causing the design to need altering to reduce any weakening.

I tried to design something like that at first.
But i ended too complex designs every time.

Also i planned: ( this can be done later too )
To drill dimples both sides of the outer slide, with suitable interval ( 1" ?) So that those locking bolts hit to those dimples.
Then place steel balls ( from bearing ) inside the threaded hole.
Then when you tighten locking screws, those push steel balls to the dimples on the slide. This would give strong hold, without need much tightening force.

I will make this improvement when i found suitable sized bearing.

( I hope you understand what i try to explain )

[Frank S]

I tried to design something like that at first.
But i ended too complex designs every time.

Also i planned: ( this can be done later too )
To drill dimples both sides of the outer slide, with suitable interval ( 1" ?) So that those locking bolts hit to those dimples.
Then place steel balls ( from bearing ) inside the threaded hole.
Then when you tighten locking screws, those push steel balls to the dimples on the slide. This would give strong hold, without need much tightening force.

I will make this improvement when i found suitable sized bearing.

( I hope you understand what i try to explain )

I understand you thinking of using ball bearings and dimpling for detents and the holding stops.
This will work. There will be a slight degree of difficulty in doing this the balls will need to be near the same size as the locking bolts you will want to drill into the ends of the locking bolts and place a spring in them to push lightly against the balls you do not want the dimples too deep or the balls will seize in the dimples each time they pass by but deep enough that the linear force of the screw does not force deformation of the slide. The springs will need have a very light compression strength just enough to cause the balls to be thrust against the slide.
And I full well see the complexity of trying to incorporate a double half nut design as well.
Currently you have a great compromise build as it is and Like you said in would be next to impossible for a single vice to serve all aspects of multiple industries

[Tuomas]

E X C E L L E N T ! !
I like it.
I gotta build one (but BIGGER!)
: - )

Thanks!
That's great to hear.

[tekcraft]

This is a very clever design. Well Done !

[Tuomas]

This is a very clever design. Well Done !

Thank you very much!
Feedback is allways a good thing, nice feedback.. even better.