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

Tue Apr 5 14:25:37 EDT 2011

On Apr 5, 2011, at 5:19 AM, Bruce Freeman wrote:

> I don't think I can go this route.  I'd have to put a tank that large
> out of doors.
That's what i do...plumbing is cheap. The return line has to be a big enough diameter to
minimize line friction.
>  I'll just wait till I find what I want in a compressor.
> 
> I looked at one being sold used a couple weeks ago.  The 4.5 HP
> compressor ran fine but was very loud.  there was a slow air leak in
> some obscure fitting impossible to reach.  The quick-connect was
> plumbed backwards, so when you removed the hose all the air blew out
> of the tank (and there was no shut-off valve).  The tank showed rust
> on the outside and the owner said it might have water inside as he had
> NEVER drained the tank -- the stopcock was frozen.  I passed on that
> one!
Right response. The next compressor i got  ( free) was from a gas station that had never drained their's either
and the nice old compressor was shot. The tank was almost completely full of water!
I rudely rebuilt it and used it for years.
I'm pretty good at rusty fittings by now.
> 
> On Tue, Apr 5, 2011 at 2:07 AM, peter fels <artgawk at thegrid.net> wrote:
>> 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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>>>>> 
>>>>> 
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>>> 
>>> 
>>> 
>>> --
>>> Bruce
>>> NJ
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> 
> 
> 
> -- 
> Bruce
> NJ
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