[TheForge] A little OT -- a mini-scale saber saw?

Tue Apr 5 14:20:20 EDT 2011

That's interesting...thanks Andy
Given that a low income approach like this would be using junk tanks....
It's quite possible that corrosion would have weakened the tank considerably though.
( Inspect Before Use!)
I once visited a shop where the guy had a small compressor hooked to a whole row of 55 Gal oil barrels
as an air receiver.
When i was incredulous he assured me that they were HD barrels.
I boogied right outa there!

On Apr 5, 2011, at 5:18 AM, osan at netlabs.net wrote:

> Bomb?  Hardly, unless it was made prior to WW II.  Enormous effort was put into the development of failsafe pressure vessel design during the war precisely because the ones they had were failing catastrophically when struck with shrapnel.  I know this because I was forced to sit through several hours of army engineering documentary on that very subject back in engineering school.  It was actually quite fascinating.
> 
> Standard pressure vessel design is such that they should always fail in relatively safe fashion.  Of course, with so much junk coming out of China these days, perhaps nothing should quite surprise us. :(
>        -A. Vida
> 
> -----Original Message-----
> From: peter fels <artgawk at thegrid.net>
> Sender: theforge-bounces at mailman.qth.net
> Date: Mon, 4 Apr 2011 23:07:07 
> To: Blacksmithing List Sponsored by ABANA<theforge at mailman.qth.net>
> Reply-To: Blacksmithing List Sponsored by ABANA <theforge at mailman.qth.net>
> Subject: Re: [TheForge] A little OT -- a mini-scale saber saw?
> 
> How much air do you need?
> More storage means more air for longer.
> Be very conservative with air pressure tanks!
> They can go off like a bomb!..Lotta kinetic energy!
> Putting them somewhere way over there, has a lot of virtue.
> 
> My first compressor was from an old refrigeration unit,
> The tubing went to 2, 250 gallon, ( carefully washed out) former propane tanks.
> I used several hot water heater over- pressure valves in each one and tapped a hole in the bottoms
> for radiator drain valves .
> Ordinary sched 40 house plumbing will generally deal with 100 PSI. if you are careful.
> 
> It was enough air to do a little sandblasting...or run an air tool for a while.
> Needless to say, that rig took a long time to recover. 
> Safe from air tool boredom.
> Cost around $5 for fittings i couldn't scrounge.
> 
> On Apr 4, 2011, at 8:49 PM, Bruce Freeman wrote:
> 
>> How big a tank do you mean?
>> 
>> On Mon, Apr 4, 2011 at 6:59 PM, peter fels <artgawk at thegrid.net> wrote:
>>> An inexpensive little compressor ( even one from a bigger freezer) and a big pressure rated storage tank,
>>> will cover a whole lot of applications.
>>> 
>>> On Apr 4, 2011, at 3:12 PM, dann at wctatel.net wrote:
>>> 
>>>> 
>>>> Bruce,
>>>> 
>>>> On one of my EAA / experimental aircraft builders groups, they talked
>>>> about an inexpensive little air- saw that "worked great".
>>>> Here is a link from harbor freight.
>>>> http://www.harborfreight.com/high-speed-metal-saw-91753.html
>>>> 
>>>> Dann
>>>> 
>>>> 
>>>>> Bruce...it's easy to cut down jig or saber saw blades with an abrasive
>>>>> disc.
>>>>> 
>>>>> On Apr 4, 2011, at 5:18 AM, Bruce Freeman wrote:
>>>>> 
>>>>>> I have a saber saw with 6"- 8" blades.
>>>>>> 
>>>>>> I have a "jig saw" with 3" - 4" blades.
>>>>>> 
>>>>>> What I need now is a hand-held reciprocal saw that takes blades maybe
>>>>>> 1" long.  This tool should ideally be comparable in size to a Dremel
>>>>>> tool, and have replacement blades available of different types.  I
>>>>>> need it for cutting small holes in plastic, wood, and thin metals.
>>>>>> 
>>>>>> Anyone know of such a tool?
>>>>>> 
>>>>>> I've been tempted by those oscillating tools, but they don't quite
>>>>>> fill this bill.  I've been using a Dremel tool with rotary saw blades,
>>>>>> but that isn't suitable for all of the tasks I'm doing.
>>>>>> 
>>>>>> --
>>>>>> Bruce
>>>>>> NJ
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>> 
>> 
>> 
>> -- 
>> Bruce
>> NJ
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