MadModder
Gallery, Projects and General => Neat Stuff => Topic started by: ieezitin on December 26, 2015, 07:29:02 PM
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Not my idea it came from Mr Harrold Hall. I have a project coming up that will extend the reach of my 6'' four jaw chuck I need to hold a 6 sided object and i need it to be controlled pretty tight so i made these nice side forcing clamps.
(http://i721.photobucket.com/albums/ww212/ieezitin/LATHE%20FACE%20PLATE%20WORK%20HOLDING/FACE%20PLATE%20HARROLD%20HALL%206_zpsnnjqqaa5.jpg) (http://s721.photobucket.com/user/ieezitin/media/LATHE%20FACE%20PLATE%20WORK%20HOLDING/FACE%20PLATE%20HARROLD%20HALL%206_zpsnnjqqaa5.jpg.html)
Not hard to make and very useful..
(http://i721.photobucket.com/albums/ww212/ieezitin/LATHE%20FACE%20PLATE%20WORK%20HOLDING/FACE%20PLATE%20HARROLD%20HALL%205_zpsfxwl1e2r.jpg) (http://s721.photobucket.com/user/ieezitin/media/LATHE%20FACE%20PLATE%20WORK%20HOLDING/FACE%20PLATE%20HARROLD%20HALL%205_zpsfxwl1e2r.jpg.html)
as you can see they are pretty versatile....
(http://i721.photobucket.com/albums/ww212/ieezitin/LATHE%20FACE%20PLATE%20WORK%20HOLDING/FACE%20PLATE%20HARROLD%20HALL%204_zpsmwahzmnp.jpg) (http://s721.photobucket.com/user/ieezitin/media/LATHE%20FACE%20PLATE%20WORK%20HOLDING/FACE%20PLATE%20HARROLD%20HALL%204_zpsmwahzmnp.jpg.html)
(http://i721.photobucket.com/albums/ww212/ieezitin/LATHE%20FACE%20PLATE%20WORK%20HOLDING/FACE%20PLATE%20HARROLD%20HALL%203_zpsclyrwlie.jpg) (http://s721.photobucket.com/user/ieezitin/media/LATHE%20FACE%20PLATE%20WORK%20HOLDING/FACE%20PLATE%20HARROLD%20HALL%203_zpsclyrwlie.jpg.html)
(http://i721.photobucket.com/albums/ww212/ieezitin/LATHE%20FACE%20PLATE%20WORK%20HOLDING/FACE%20PLATE%20HARROLD%20HALL%202_zpsa8vallpn.jpg) (http://s721.photobucket.com/user/ieezitin/media/LATHE%20FACE%20PLATE%20WORK%20HOLDING/FACE%20PLATE%20HARROLD%20HALL%202_zpsa8vallpn.jpg.html)
(http://i721.photobucket.com/albums/ww212/ieezitin/LATHE%20FACE%20PLATE%20WORK%20HOLDING/FACE%20PLATE%20HARROLD%20HALL%202_zpsa8vallpn.jpg) (http://s721.photobucket.com/user/ieezitin/media/LATHE%20FACE%20PLATE%20WORK%20HOLDING/FACE%20PLATE%20HARROLD%20HALL%202_zpsa8vallpn.jpg.html)
The slots in the one clamp allow the pressure to be applied perpendicular to the job via the grub screws . The other block clamps are just buttress blocks, Align your work piece with a prick mark, center it with a carbide center, squeeze it in and clamp the piece accordingly.
Anthony.
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Anthony:
That's pretty slick. Howard Hall does come up with some very good ideas.
John.
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Anthony,
Yes, those are pretty neat.
Just one question, Don't you need two 'tighteners' ? One opposing each fixed buttress.
Dave.
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There are two.
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Seadog,
Where is the second one ?
And Anthony wrote...
...The slots in the one clamp allow the pressure to be applied perpendicular to the job via the grub screws . The other block clamps are just buttress blocks,..
I did expect to see two, but can only find one; that's why I queried it.
Dave
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David, the images are a little too large. if you scroll to the right you'll see the second clamp block.
Graham
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Seadog,
Where is the second one ?
And Anthony wrote...
...The slots in the one clamp allow the pressure to be applied perpendicular to the job via the grub screws . The other block clamps are just buttress blocks,..
I did expect to see two, but can only find one; that's why I queried it.
Dave
I had to click on the picture then look at the others in his photo bucket account before I could see the other 1 :Doh: the picture doesn't seem to be here :doh: just on photo bucket :hammer:
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Mexican Jon, Seadog,
That would account for it. I assume it must be the mostly hidden clamp behind the thick vertical web.
But definitely a 'must make' item.
Dave.
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The most awkward item I had to ever had to put in a lathe was a regulation Bowling Ball. It had to have a piece parted off for a lid for an art project.
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If there is still any confusion, Mr Hall's drawings for the clamps freely available on his website will clear it up. http://www.homews.co.uk/LPClSim01.pdf
His website is well worth bookmarking. It is full of very useful and interesting stuff.
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These clamps are truly excellent however I made mine with the tightening screws more towards the top of the blocks than the ones shown so you get a downward thrust as you tighten them. This is in keeping with Mr Hall's original design- as in Model engineering workshop where I saw them.
take care when tightening onto the t slots as you really can exert some force with these.
Happy New year one and all! :beer:
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Dave...
I really should have paid attention while photographing the blocks, there are two force blocks and they are directly opposite one another thats the only way they work. I posted this same thread on another site and everyone commented on how this set up would not hold the angle block and HSS spacer, i only threw them on the face plate for a visual... alas they are correct, these little blocks would not hold this set up and i did not intend them to hold items like these of such height.
I did not make them exactly to Harrold halls print... i just was in the shop and machined on the fly as that is a normal MO for me to do, i must say (howsitwork) comment on the screw height is correct, none the less these blocks will work fine for what i need now and i am going to size the blocks up and make another set for different size work, these are a must in your tool work holding crib.
God Bless..... Anthony.