On 2008-03-21, Jon Elson wrote:
Tom Gardner wrote:
I have a brand-spankin'-new Kurt D675 vise (no oopses yet) and I needed a way to
do angled slots. I found this swivel base on eBay
I got a Chinese Kurk knock-off some years ago, it came with the swivel.
A "Kurk" -- they couldn't even copy the name right? :-)
The first cut I made with it, the vise was vibrating like crazy. So,
I took off the swivel, bolted the vise directly to the table, and
haven't used it since. Unless you will always make light cuts with the
swivel, you will not be very happy with it at all. I'm not talking
about a slight vibration, I could SEE the vise rocking from side to side!
Hmm ... the things which matter he
1) The pin allows the vise to fully bottom on the swivel base.
2) There are no chips resting on and no dings in the swivel base
(which would otherwise hold part of the vise too high.
3) The T-bolts in the swivel base fit well, stick up through the ears
of the main vise body, and have proper sized flanged nuts firmly
tightened onto them to hold the vise body firmly onto the swivel
base.
4) The swivel base is likewise chip free in its interface with the
table, and firmly held down with proper T-studs and flanged nuts.
5) The swivel base should be checked for warpage before bolting
it down. If it is warped, especially in such a way as to hold
the sections between the hold-down ears clear of the table, it
could indeed rock.
6) And -- which I should have put as the first item, the alignment
keys in the bottom of the main vise body should be removed, and
replaced on the bottom of the swivel base -- or just set aside.
If they are left on the main vise body, they may hold the vise
a bit clear of the swivel base and thus allow it to rock.
Maybe the Kurt is stiffer in some way, but I doubt it is a great
improvement on the knock-off, as cast iron is fairly cheap.
Or -- maybe one or more of the points above needed seeing to.
I've had good results with a swivel base on both a 4" Kurt clone
and a 3" Kurt clone -- with rather heavy cuts in a horizontal spindle
milling machine.
Enjoy,
DoN.
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