From: kuhrick (kuhrick@comcast.net)
Date: Thu Oct 16 2003 - 05:06:53 PDT
you should be ok a elc drier is 30 amp most of the time
and a 5horse motor is only 27 or less
that start fine on 30 amp fuses
ken
At 10:47 PM 10/15/2003, Paul A. Thomas wrote:
>Jeez. . My entire house/garage is on a 90 amp service!! ( Originally built
>in the middle of WWII, upgraded from 60 amps some years ago ) I wonder if
>I could even run a pump which needs 220-240 here. Would a 15-20 CFM
>electric motor compressor pull much more amperage than an electric
>dryer? I was considering having the dryer line extended within the
>garage, then running either one or the other at a time.
>
>
>Many thanks, once again.
>
>
> paul
>
>***********************************************************
>
>
>At 10:09 PM 10/15/2003 -0500, you wrote:
>>Hey, I understand. You have to take what everyone else says and figure
>>out what works for you.
>>
>>I don't live in the city, so using a large pressure blaster outside is
>>not a big deal. If I was in the city with a small lot, everything would
>>be different.
>>
>>I blasted for a couple years with my 5 hp compressor alone. It ran a 1/8
>>tip ok. But when you can generate 30+ cfm, it makes a big difference in
>>productivity.
>>
>>I have a 100 amp service to my garage and can run that 10 hp air
>>compressor with a phase converter - no problem. I've never popped the
>>breaker. I've even run the 5 hp compressor at the same time, again no problem.
>>
>>Good Luck whatever way you decide to go.
>>
>>Dave
>>
>>
>>On Tue, 14 Oct 2003 21:27:54 -0700, Paul A. Thomas
>><bluewhale@jaxkneppers.com> wrote:
>>
>>>Hi Dave:
>>>
>>>Thanks for your break-down. You, Steve G and half a dozen others all
>>>seem to give similar advice based on experience with multiple approaches
>>>and makes. To all of those who gave advice like this I appreciate the
>>>@#%@# of it: however I need a solution which allows me to come home
>>>from OT at work, fire up and clean XXX parts and not spend time setting
>>>up, tearing down, cleaning up, loading media. Not to mention my
>>>friendly neighbor..
>>>If I win the Lotto ( no disrespect intended ) I plan on kicking back,
>>>and going to auction after auction. In the mean time, one makes
>>>do. The suggestion I read earlier about getting all the power I could
>>>from my compressor when I buy it sounds right on: whatever my house's
>>>service will take is what I will price.
>>>Now to get busy before the local authorities realize I'm doing
>>>reconstructive work here!
>>>
>>>Thanks again.
>>>
>>>Paul
>>>
>>>***********************************************************
>>>
>>>
>>>At 10:56 PM 10/14/2003 -0500, you wrote:
>>>>I'm partial to Quincy cast iron compressors or similar. The run slow
>>>>and produce more air CFM per hp that most other compressors. Also,
>>>>they are made to run continously (at least the heavier models are) and
>>>>then can run that way all day and not overheat.
>>>>
>>>>Warning: A real 5 hp motor draws about 22-24 amps at 230 volts single
>>>>phase. Sears and several others lie about their hp ratings. I don't
>>>>know how they can do that but they do. To make 5 hp, you need about 24
>>>>amps at 230 volts, there is no magic way to get around that fact. It
>>>>takes about 1000 va (volts times amps) of input power to produce 1 hp
>>>>of shaft power for small electric motors.
>>>>
>>>>I have a real 5 hp air compressor with an old Westinghouse Cast iron
>>>>two stage head. It works fine for running air tools and
>>>>sprayers. However when it comes to blasting, even a real 5 hp
>>>>compressor comes up short.
>>>>I have a 10 HP 3 phase air compressor that I run off a homemade rotary
>>>>phase converter to produce air for blasting. It has a large Quincy 2
>>>>Stage cast iron heat that must weigh 150-200 lbs by itself. The pump
>>>>is rated at 36 cfm. Everything is mounted on a 120 gallon tank. I
>>>>bought the compressor complete (less magnetic starter and controls) for $250.
>>>>The guy just wanted to get rid of it. I hauled it home and in just a
>>>>couple of hours I had it running. A couple of years ago, I bought a
>>>>second Quincy Compressor but with a single stage head that is rated at
>>>>34 CFM with no motor and a 120 gallon tank for $100. I have a Linsay
>>>>200 lb pressure pot that works well. Lindsay went out of business
>>>>about two years ago, so parts are a bit hard to find, but it's a good pot.
>>>>
>>>>The 10 hp Quincy compressor can run a new 3/16 nozzle at 90 PSI not
>>>>quite continously. I can blast for about 10 minutes and then rest for
>>>>2 and that works fine. The rest period allows the compressor to catch
>>>>up and refill the 120 gallon tank. I end up moving stuff around every
>>>>10- 15 minutes anyway it seems so not being able to blast continously
>>>>is really not a problem.
>>>>
>>>>The guy on that site mentioned using Silica sand. I think that is a
>>>>waste of time and money. Black Beauty or the equivalent furnace slag
>>>>blasting media is a lot faster than silica sand and it is much, much
>>>>safer. (Read - more metal blasted for less $) IMO, that guy on the web
>>>>site used the wrong equipment. Spending 5 weeks of 10 hours days
>>>>blasting two vehicles! My blaster chews through about 200 lbs of sand
>>>>in about 30-40 minutes. But you can cover a lot of metal in 30 minutes.
>>>>
>>>>My recommendation is to skip Sears all together. Look up sandblasting
>>>>equipment in the yellow pages. Visit a commercial supplier of sand
>>>>blast equipment and see what they have. Perhaps they have some used
>>>>stuff they want to get rid of? Look for auctions, plant closings (they
>>>>are happening all over the midwest!), and pickup a nice two stage
>>>>compressor that can put out the air. You can run a 1/8 nozzle off a
>>>>real 5 hp compressor, but you need to take breaks to allow it to catch up.
>>>>
>>>>If I had to blast a duece and I had no equipment, I'd probably rent a
>>>>gas or diesel compressor and a sand pot and buy about 1000 lbs of sand
>>>>and go to it. That equipment can easily get the job done in a day. If
>>>>you buy a Sears 5 hp compressor (really about 3 hp) and a cheap siphon
>>>>blaster, you could spend a week or more blasting the same truck.
>>>>
>>>>Dave
>>>>
>>>>
>>>>
>>>>
>>>>On Tue, 14 Oct 2003 16:10:30 -0700, Paul A. Thomas
>>>><bluewhale@jaxkneppers.com> wrote:
>>>>
>>>>>This list is great! I have received the opinions of perhaps two dozen
>>>>>listers regarding their thoughts and experiences with different types
>>>>>of abrasive blasting and the manufacturers of the equipment. Based on
>>>>>what I can do now and those suggestions, I'm going to buy a Skat 960
>>>>>cabinet soon.
>>>>>
>>>>>However my 9 month old portable air compressor is not up to the job,
>>>>>not even with a small carbide tip on the gun. When I have no other
>>>>>idea what to do I usually go to Sears and see what they have, then buy
>>>>>what I need ( hopefully ). Could anyone give me their thoughts on
>>>>>brand and type of air compressor to look at for this? I found a
>>>>>number of opinions about blasting and air compressors on line, but
>>>>>found this one echoed what listers were saying closely so thought to
>>>>>TRY to use his recommendations..
>>>>>
>>>>>http://www.speedprint.com/Deves50/Sandblasting.html
>>>>>
>>>>>However I'm not going to be doing anywhere near the volume he does, so
>>>>>am currently considering a Sears unit with an 80 Gal tank, a 7 horse
>>>>>two stage engine, 240 volt. Puts out 16-18 CFM at 100-175 PSI.
>>>>>Overkill perhaps for the blasting cabinet, but I also will be using a
>>>>>pressurized gun on parts of the trucks which will not fit into the
>>>>>cabinet, so the extra power will probably come in handy.
>>>>>
>>>>>Thanks for all of the responses. I don't like spending money, but
>>>>>when I have to do it I really dislike wasting it on something that
>>>>>doesn't work well. :}
>>>>>
>>>>>
>>>>>Paul
>>>>>MVPA# 24986
>>>>>'53 REO M35 Fire Conversion
>>>>>'53 AEC Chevy 3/4 Ton
>>>>>www.paulathomas.com/images
>>>>>
>>>>>
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>>>>
>>>>
>>>>
>>>>--
>>>>Dave
>>>
>>>
>>>===Mil-Veh is a member-supported mailing list===
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>>
>>
>>
>>--
>>Dave
>
>
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