On 7/10/2023 11:36 AM, Snag wrote:
On 7/10/2023 12:12 PM, Bob La Londe wrote:
On 7/10/2023 9:47 AM, Jim Wilkins wrote:
"Bob La Londe" wrote in message news:u8h87e$2igji$1@dont-email.me...
Okay, my little Columbian isn't even in the same league, but I thought
you might enjoy seeing what kind of clamping force can be achieved with
a premium vise.
https://www.youtube.com/watch?v=CubcmE4kt78&t=3097s
I found it interesting that I saw a lot of whining and complaining about >>> the price tag for Jason's vise. That it was way over priced. Its
considerably cheaper than what he compares it to. I probably wouldn't
scrimp and save to buy one, but if I had a heavy fabrication shop I
think it would be a great value to have over the alternatives. I'd
probably have a couple of them in a medium or large shop.
Yes, its an almost hour long video, but I timed stamped the link to
where it shows the by hand clamping force of all three vises being
tested. I find his style entertaining and his voice tolerable. I watch >>> stuff like this while I am having my morning coffee.
He also tested to initial failure and ultimate failure.
https://www.youtube.com/watch?v=CubcmE4kt78&t=3111s
Bob La Londe
--------------------
Thanks. I don't normally test to destruction unless the part is cheap
or someone else is paying. Most of my load cells are second hand, of
unknown abuse history and one broke already.
A vise you can hold in your hand reaches the highest pressures:
https://en.wikipedia.org/wiki/Diamond_anvil_cell
Weeeeeeelll! That's going to be about useless for pressing in a wrist
pin or pressing out a u-joint.
I broke an old vise pressing out u-joints once. That's when I acquired
my first "real" press. A 12 ton Horrible Fright I bought from my dad
because he had acquired a 20 ton.
I think my second hand HF press came originally as a 12 ton , I stuck
a 20 on it . I had to replace a section on the bottom of the top
crosspiece , the bolts were pulling thru . I cut the bent parts out and welded in a piece of 1/2" plate . Nothing else has bent or broken ... yet .
I put a 12 ton air over hydraulic jack on mine, and it was adequate to pull/push it apart on some long forgotten project. It was something
long (I forget what) and the damage is down low where it doesn't have
any impact on 99.9% of all things I use the press for. The original 12
ton jack has been used a handful of times where nothing else was
suitable, and it lives under the press like a troll under a bridge. My
20 ton press lives outside and I hardly ever use it. The air over jack
on the 12 ton is so much more convenient. Eventually I'll put a
hydraulic cylinder and a pump on the 20 ton, but its not a critical
project. It will probably get done on the fly because i need it for
something "right now." I've also rebuilt the ram assembly on the 12 ton
with a piece of solid bar in place of the heavy wall tube it originally
had. I might have bent/kinked it for the same project where I stretched
the uprights apart. I don't recall for sure.
--
Bob La Londe
Proffessional Hack, Hobbyist, Wannabe, Shade Tree, Button Pushing, Not a
real machinist
--
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