MadModder
Gallery, Projects and General => Gallery => Topic started by: wheeltapper on May 10, 2011, 02:41:12 PM
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Hi
For some time now I've been getting fed up with the topslide on my lathe.
it gets in the way, it puts too much flex in the tool ( tool cutting on the return pass) and I only need it for cutting a taper.
so I took it off.
heres what I have now.
(http://i293.photobucket.com/albums/mm72/wheeltapper_2008/model%20engineering%20stuff/topslidefreetoolpost.jpg)
I also made a seperate block to go in place of the QC holder to hold standard half inch round shank boring bars.
(http://i293.photobucket.com/albums/mm72/wheeltapper_2008/model%20engineering%20stuff/topslidefreeboringbarholder.jpg)
the whole thing is much stiffer now.
Roy.
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That looks really effective Roy :thumbup: :thumbup: That is a mod that I could do with on my lathe, it might remove some of the elastic properties that my little lathe suffers from.
Tim
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Nice one Roy :bow:
I have a C4 as well and the top slide is a bit poo I have the gibs locked up almost solid.
I like your solid mounting Idea I may have to copy it :thumbup:
PS what is that in you tail stock :scratch:
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Wheeltapper - the chap who I visit quite often has an Asian made lathe and he has done exactly the same! It seems the topslides are made of rubber. Nice job, thanks for showing.
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Yep!
Me too..... http://madmodder.net/index.php?topic=2464.0
It doesn't half make a difference! :thumbup:
Like your rear toolpost too! :clap:
David D
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Hi Roy
That's a very nice looking job. I did this to my Real Bull 7x14 some time ago and the improvement was spectacular. But I made mine out of a block which could be fitted 4 ways allowing different toolholder offsets and overhangs for awkward jobs. Mine attaches with 4 cap head bolts.
(http://i917.photobucket.com/albums/ad19/picclock/P1000343.jpg)
IMHO, its probably one of the most worthwhile mods for smaller lathes, as it allows easy parting and much better finishes just because of the improvement in rigidity. For fine feed a handle on the right hand end of the leadscrew does the trick on mine.
Now if only I could figure out how to turn tapers without having to reset that precision tailstock alignment .. . :scratch:
Best Regards
picclock
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worth while mod :clap:
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Nice one Roy :bow:
I have a C4 as well and the top slide is a bit poo I have the gibs locked up almost solid.
I like your solid mounting Idea I may have to copy it :thumbup:
PS what is that in you tail stock :scratch:
Hi
Its a cork, It keeps the crap out. :lol:
Roy
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Nice one Roy :bow:
I have a C4 as well and the top slide is a bit poo I have the gibs locked up almost solid.
I like your solid mounting Idea I may have to copy it :thumbup:
PS what is that in you tail stock :scratch:
Hi
Its a cork, It keeps the crap out. :lol:
Roy
likewise! its easier to push a cork in, than clear all the crap out!
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Hi
Just as a tailpiece to this I tried a little test.
I set up a dti on the cross slide with the probe resting 2mm from the tip of a r h tool.
taking a 2 mm cut with the toolpost mod I got a tool deflection of .0004"
with the topslide refitted I got over 7 times that deflection.
I think it was worth doing.
there is, however, a downside (isn't there always) I now have no fine feed along the lathe, I have not got a handwheel on the leadscrew and even if I had one it would be a pain because there is no quick way to disconnect the leadscrew apart from removing a change wheel.
Ho hum, you win some, you lose some.
Roy