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Author: BottleBobBottleBob Date: Apr 8, 2008 18:21
To All:
Just to alert everyone to a freak problem we had with a Kurt type vise.
The problem happened with an MSC Kurt look-alike vise. A coworker was
putting some flats on both sides of some .125 pins. But...
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Author: jon_banquerjon_banquer Date: Apr 8, 2008 18:30
On Apr 8, 6:21 pm, BottleBob earthlink.net> wrote:> To All:
>
> Just to alert everyone to a freak problem we had with a Kurt type vise.
> The problem happened with an MSC Kurt look-alike vise. A coworker was
> putting some flats on both sides of some .125 pins. But then some of
> the pins' flats were off center even after being indicated in. So we
> put an indicator on the back jaw (a custom made one) and saw that when
> the vise was tightened the indicator moved some .005. Then we put the
> indicator on the back of the immovable jaw support (at least
> theoretically immovable). And IT MOVED .005 when the vise was
> tightened. The vise was taken off the machine and the solid support
> was taken off the base and all surfaces and the key and keyway were
> cleaned...
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Author: BottleBobBottleBob Date: Apr 8, 2008 18:46
jon_banquer wrote:
> On Apr 8, 6:21 pm, BottleBob earthlink.net> wrote:>> To All:
>>
>> Just to alert everyone to a freak problem we had with a Kurt type vise.
>> The problem happened with an MSC Kurt look-alike vise. A coworker was
>> putting some flats on both sides of some .125 pins. But then some of
>> the pins' flats were off center even after being indicated in. So we
>> put an indicator on the back jaw (a custom made one) and saw that when
>> the vise was tightened the indicator moved some .005. Then we put the
>> indicator on the back of the immovable jaw support (at least
>> theoretically immovable). And IT MOVED .005 when the vise was
>> tightened. The vise was taken off the machine and the solid support
>> was taken off the base and all surfaces and...
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Author: Gary H. LucasGary H. Lucas Date: Apr 8, 2008 19:00
"BottleBob" earthlink.net> wrote in message
news:VqadnYRjIOGch2HanZ2dnUVZ_sOrnZ2d@earthlink.com...> To All:
>
> Just to alert everyone to a freak problem we had with a Kurt type vise.
> The problem happened with an MSC Kurt look-alike vise. A coworker was
> putting some flats on both sides of some .125 pins. But then some of the
> pins' flats were off center even after being indicated in. So we put an
> indicator on the back jaw (a custom made one) and saw that when the vise
> was tightened the indicator moved some .005. Then we put the indicator on
> the back of the immovable jaw support (at least theoretically immovable).
> And IT MOVED .005 when the vise was tightened. The vise was taken off the
> machine and the solid support was taken off the base and all surfaces and
> the key and keyway were cleaned, deburred and reassembled. It STILL moved
> when tightened.
> Now I'm not saying this couldn't happen to a real Kurt, but it DID happen
> to non-Kurt vise.
>
> --
> BottleBob ...
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Author: robinstoddartrobinstoddart Date: Apr 8, 2008 20:02
On Apr 8, 9:21Â pm, BottleBob earthlink.net> wrote:
 And IT MOVED .005 when the vise was> tightened.  The vise was taken off the machine and the solid support
> was taken off the base and all surfaces and the key and keyway were
> cleaned, deburred and reassembled. Â It STILL moved when tightened.
The fixed jaw moved when the vice was tightened...
So, what was the problem? I'd be surprised if these solid pieces were
getting crushed out of form. Did you use some type of bearing blue to
check for contact between the jaw and the cast base when the jaw was
not screwed tight to the base? Perhaps feeler stock? Perhaps the base
is cracked and the fixed jaw is able to flex away from the movable
jaw?
You're not still using the vice without knowing what's wrong are you?
Regards,
Robin
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Author: BottleBobBottleBob Date: Apr 9, 2008 03:44
> On Apr 8, 9:21 pm, BottleBob earthlink.net> wrote:
> And IT MOVED .005 when the vise was>> tightened. The vise was taken off the machine and the solid support
>> was taken off the base and all surfaces and the key and keyway were
>> cleaned, deburred and reassembled. It STILL moved when tightened.
>
> The fixed jaw moved when the vice was tightened...
Robin:
Yes, that was the issue.
> So, what was the problem? I'd be surprised if these solid pieces were
> getting crushed out of form. Did you use some type of bearing blue to
> check for contact between the jaw and the cast base when the jaw was
> not screwed tight to the base? Perhaps feeler stock? Perhaps the base
> is cracked and the fixed jaw is able to flex away from the movable
> jaw?
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Author: BottleBobBottleBob Date: Apr 9, 2008 03:59
Why wrote:
>> The fixed jaw moved when the vice was tightened...
> Just weld the fixed jaw to the base & skim the back square .
Dave:
Now THERE'S an idea. BUT, you'd not only have to skim the base, you'd
have to make sure the faces of the welded, and possibly distorted, jaw
were perpendicular to the base. And if much was taken off the base the
jaw faces of the movable block would have to be checked and squared up
as well. Also the the surfaces the movable block slides on would have
to be ground parallel to the base. Jeeze, now we're looking at just
about making a new vise! LOL
THEN to top it off, after regrinding, the base to movable jaw sliding
surface dimension will probably be less than standard. Which might
interfere with "some" jobs that require that dimension be close when
using multiple vises.
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Author: JerryJerry Date: Apr 9, 2008 04:08
We had the same problems with Kurt type vises years ago.
Today you can walk around the shop and see them sitting on benches gathering
dust. Everyone is using Kurts.
I prefer to use the square sides ones with solid jaw one piece with the
base.
Some of the bigger Kurts (8.875" opening) have a problem of not staying flat
on the bottom after few years but all and all they are a lot more dependable
then anything else we used.
Jerry
"BottleBob" earthlink.net> wrote in message
news:VqadnYRjIOGch2HanZ2dnUVZ_sOrnZ2d@earthlink.com...> To All:
>
> Just to alert everyone to a freak problem we had with a Kurt type vise.
> The...
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Author: JonJon Date: Apr 9, 2008 10:56
"BottleBob" earthlink.net> wrote in message
news:FMCdnarVH4Z3gmHanZ2dnUVZ_gidnZ2d@earthlink.com...> jon_banquer wrote:
>> On Apr 8, 6:21 pm, BottleBob earthlink.net> wrote:>>> To All:
>>>
>>> Just to alert everyone to a freak problem we had with a Kurt
>>> type vise.
>>> The problem happened with an MSC Kurt look-alike vise. A
>>> coworker was
>>> putting some flats on both sides of some .125 pins. But then some of
>>> the pins' flats were off center even after being indicated in. So we
>>> put an indicator on the back jaw (a custom made one) and saw that when
>>> the vise was tightened the indicator moved some .005. Then we put the
>>> indicator on the back of the immovable jaw support (at least
>>> theoretically immovable). And IT MOVED .005 when the vise was
>>> tightened. The vise was taken off the machine and the solid support
>>> was taken off the base and all surfaces and the key and keyway were
>>> cleaned, deburred and reassembled. It STILL moved when tightened.
>>> Now I'm not saying this couldn't happen to a real Kurt, but it ...
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Author: jon_banquerjon_banquer Date: Apr 9, 2008 19:32
> For the tiny difference in price vs the quality difference, I can't imagine
> not using a Kurt.
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