[TheForge] Plate for my post vise

[martin paietta]

Hi Charles,

I was thinking of the tire with Concrete also. How large of a tire do you
think would be needed to keep it stable for most situations? 

-----Original Message-----
From: theforge-bounces at mailman.qth.net
[mailto:theforge-bounces at mailman.qth.net] On Behalf Of xlch58 at swbell.net
Sent: Tuesday, November 14, 2006 3:42 PM
To: Sponsored by ABANA
Subject: Re: [TheForge] Plate for my post vise

martin paietta wrote:
> Hi Ries,
>
> I know the optimal is to bolt it down to something sold like a table 
> or wall, but I have limited space. I also end up moving it all around 
> to meet my needs.
>
> Cheers
> Martin
>
>   
The problem is that it all depends.   For work hammered down against the 
jaws, i.e. upset, the weight of the base is not really critical, just 
enough to stabalize the vise is all that is needed.   For bending you 
need more weight.  If all you are working is half inch bar hot, bending
won't require much weight.  If you are bending 3/4 inch, then you start
needing more weight.  The roughest is twisting operations. Twisting heavy
sections tends to pull the vise over, so you need more weight in 
the base.   It also tends to make the vise turn with you which makes it 
less useful.  The degree that it resists this will be a product of the
weight and the coefficient of friction between the base and your 
flooring.   Steel does not present a lot of friction in this instance.   
Concrete has a higher degree of friction.   I have considered making 
stands out of an old tire filled with concrete with a 4x4 thick wall tube
stuck into it.  Easy to roll,  good weight, high friction and 
cheap.    Personally, I would save the money on the steel plate, or use 
it for something else.

Charles

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