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Tool Talk Discussion Forum

***** Sandblasting? *****

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D. MAC (St. Lou

05-01-2004 08:00:04




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Well gentleman, I decided to hold off on buying a tractor until next summer, in order to save up some money and make my first purchase the right purchase! After looking intensely for the past two weeks, these tractors are my favorite, JD 3020, Ford 4000, AC's 170 - D15, and Oliver.

So, what did I decide to do or purchase in order to disc my 1/2 acre foodplot? A Tufline ATV Disc. I got a wonderful deal on this disc, which is an older disc, but still built the same! In fact, it's the heavier disc they make! The paint has faded, some rust on the bolts, so I thought for my summer project, I'd give it a face lift. I decided to unbolt it, and then sandblast and/or chemically remove the paint? What do I need in order to sandblast? I have compressor (2.5 hp Rol-Air) & hose. What else do I need, and where can I get sand? I heard people using Baking Soda?? I'd rather not purchase, or spend alot on equipment, except for the paint gun. Any suggestions would be appreciated.

Attached below is a picture/link of the Tufline Disc I purchased. Any suggestions are appreciated? Up close, the paint is starting to peel, and rust underneath. But, I think with some care, I can make this think look new again!

-Dennis


-Thanks

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Bugsy

05-02-2004 18:20:31




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 Re: ***** Sandblasting? ***** in reply to D. MAC (St. Louis, MO), 05-01-2004 08:00:04  
I've been sandblasting parts for over twenty years. The projects have been many. I've done my semi frame one day and a small part for my wife the next. My compressor is a 27 cfm, 5 hp, with an 80 gallon tank. The sandblaster is a pressure feed and holds approx. 150 lbs. of sand. The blaster and compressor are still going strong after twenty years. I'll give you a couple of tips. Buy a good water trap, when the hole in the nozzle gets enlarged, replace it. I also have a cabinet blaster. Icould not get along without either blaster. One more thing, my compressor keeps up. I say go for it.

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buickanddeere

05-02-2004 11:50:35




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 Re: ***** Sandblasting? ***** in reply to D. MAC (St. Louis, MO), 05-01-2004 08:00:04  
While there is a place for sand,soda and shot blasting but..... .. Most cleanup jobs would go just as well with less time,mess, expense and ruined bearing/seals. If the loose rust was just wire wheeled or cleaned with a "needle gun and the surface primed with phosphaic acid to "blue" the surface. Then painted. On painted surfaces a lye gravy bath to lift the paint and a high pressure wash with hot water would be better. I'm talking a real 13HP, 4 gallon per minute 3000+ psi machine with 140F water with a CAT triple ceramic pump.

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DickTN

05-01-2004 19:40:23




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 Re: ***** Sandblasting? ***** in reply to D. MAC (St. Louis, MO), 05-01-2004 08:00:04  
Dennis, I'm no expert, but I have had some success
doing sandblasting with a pressure washer and a sand lance. There's a fellow that hangs around the Ford "N" board who does truck and tractor restoration using this method. I've bought a couple of parts from him and they look really good cleaned up using this method. He uses a pressure washer at 3000 PSI and 4 GPM or thereabouts. I've had pretty good luck with a 2.4 GPM unit at 2000 PSI. This method, of course, eliminates any possibility of reclaiming and re-using the sand, but I don't think you were planning on using a blast cabinet anyway, by the way you worded your post. This method seems to me to be less dangerous as far as silicosis is concerned, since there is no sand dust to inhale. The downside of the method is that the parts "flash-rust", but a little sanding after the part is dry takes care of this. Hope this helps a bit. You can e-mail me if you want any more information. DickTN

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fixerupper

05-01-2004 19:02:36




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 Re: ***** Sandblasting? ***** in reply to D. MAC (St. Louis, MO), 05-01-2004 08:00:04  
No you don't need a big three zillion horsepower compressor with a matching sandblaster!What is the CFM of your compressor? Judging the capacity of a compressor by the Advertised horsepower can be very deceiving. If you have a real honest-to-god 2.5 horsepower motor on your compressor you probably have around 8 CFM give or take a few. That will do the job but it will take quite a long time and the compressor might run longer than it's duty rating, meaning it might not be able to be run steady for that long without getting too hot. If you want to spend a little time on it every day, there are hand held sandblasters made that hold just a few pounds of sand. They don't do much on one filling, but while you are re-filling the sandblaster,the compressor will have time to catch up. You have to remember that you will have to have complete protection for the front of your body and whatever you use for face protection will cloud up fairly fast making replacement lenses necessary. Then you need five hundred pounds of silica sand at a minimum, probably more and it will cost you $5.00 per bag at the cheapest.You can get it at your local lumber yard. Finally, your wife will be mad when you come into the house with sand in your hair, your pockets, and your underwear. If you don't have a goal to get it done quick, go ahead, after you are done you will have the equipment to use on little stuff in the future. If you want it done quick, you might be better off snooping around to find someone with a commercial sandblaster (avoid the obnoxious ones). He might not charge a whole lot and you wouldn't over stress your compressor, or your wife!

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Tim

05-01-2004 18:12:46




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 Re: ***** Sandblasting? ***** in reply to D. MAC (St. Louis, MO), 05-01-2004 08:00:04  
D. Mac
Wardner isn�t too far from the mark. I've sandblasted a lot of equipment for myself. Your 2.5hp is going to be PAINFULLY slow. Unless you have unlimited time and are willing to spend 100s of frustrating hours at it. I started with a 5hp years ago and immediately added another 5hp in series with it. I used that for a year or so but it was extremely slow. You constantly were waiting for it to build pressure again. I added another 7.5 hp to it hoping this would do the trick only to be disappointed still.
I then found a good deal on a diesel 100-cfm compressor and am finally almost happy. Sandblasting consumes enormous amounts of air. I don�t believe you can ever have too much. A lot of people think sandblasting is quick and easy. It is neither especially with budget equipment.
Heed the warning about the air supplied helmet too. Paint respirators don�t cut it either. Silicosis is deadly. Good Luck
Tim

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buickanddeere

05-02-2004 21:29:46




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 Re: Re: ***** Sandblasting? ***** in reply to Tim, 05-01-2004 18:12:46  
Adding the compressors in series will not add cfm capacity. They should have been connected in parallel, which is what you likely intended to say. It's hot water heaters that hooked in series to boost capacity and simplify flow/load sharing.



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Wardner

05-01-2004 08:56:39




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 Re: ***** Sandblasting? ***** in reply to D. MAC (St. Louis, MO), 05-01-2004 08:00:04  
2.5 hp is barely adequate to do a sparkplug. You need to get real. It will take you all summer to do any machinery. Minimum hp would be around 25 hp. I am in the business and I use a compresser with a 238 hp diesel. It is rated for 750 cfm @ 125 psi.

If you want to go to the trouble, you can shovel and dry your own sand. More likely you will probably buy it from HD (play sand), an auto body jobber, a sandblasting contractor, or rental store. You don't need anything special like baking soda. Go for the cheapest media you can find. Wear ear protection and air supplied helmet. Better yet, get a professional to do the job. He will do it better and cheaper than you will ever hope to do.

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CNKS

05-01-2004 18:31:02




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 Re: Re: ***** Sandblasting? ***** in reply to Wardner, 05-01-2004 08:56:39  
I don't do any of my own sandblasting, except for a few small parts with a spot blaster. You have a gigantic rig. I usually take the parts that are hard to strip or do with an angle grinder to a pro sandblaster. He has "only" a 350 CFM, I believe. Does the front and rear rims (inside and out) and cast centers and with the rear weights of an H, etc, along with the lower front bolster, for about $120. Takes him about 30 min or so, if I remember right, certainly less than an hour. I take the parts to him -- to me that's a fair price. Is he in the ball park?

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Ryan

05-02-2004 07:50:43




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 Re: Re: Re: ***** Sandblasting? ***** in reply to CNKS, 05-01-2004 18:31:02  
I have heard rates of a dollar a minute but I do not know how to compare that to the above. Alot depends on how much air he has and how fast he can go. Probably the best thing to do is ask yourself how long it would have taken you to do it yourself.....that is how I see it. It is hard to beat sanding on those big peices.

Ryan



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Wardner

05-01-2004 21:02:04




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 Re: Re: Re: ***** Sandblasting? ***** in reply to CNKS, 05-01-2004 18:31:02  
CNKS

I wrote a long reply but the server wouldn't accept it. Anyway $120 is a fair price. I might have done it cheaper but it depends how much calcium chloride corrosion there was on the inside of the rims. White metal can quickly degrade to black metal if the bottom of the pits are not throughly impacted. This will require a reblast or two.

I usually don't reply to sandblasting threads here. Retail sandblasting is a pain in the a$$ and I got into bigger jobs fairly quickly. My equipment doesn't really have much relevance to the low budget hobbyist. However, I couldn't let some tyro think that he can do any work with 2.5 hp. On top of that, most everybody here seems to have more experience than I do even after 30 years in the business. If people want to damage their health, run wet blasters, spend days learning the trade, and more days getting the job done, what do I care. My pearls of wisdom are just falling on deaf ears.

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CNKS

05-02-2004 17:14:14




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 Re: Re: Re: Re: ***** Sandblasting? ***** in reply to Wardner, 05-01-2004 21:02:04  
Thanks, this guy does a good job. I don't think he is a full-time sandblaster so he will take about anything as long as he has time. I haven't run into a severe CACL2 problem yet, probably will someday.



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Russ

05-01-2004 17:25:31




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 Re: Re: ***** Sandblasting? ***** in reply to Wardner, 05-01-2004 08:56:39  
WATT A BLAST; MOST PEOPLE LET THEIR IMPLEMENTS GET A NATURAL RUST PATINA. PARIS HILTON IS A OVERNIGHT WONDER TO MANY(UNFORTUNATELY-NO MEN IS MY GUESS) IF SHE STAYED AT A HOLIDAY INN EXPRESS SHE COULD GIVE YOU LOTS OF GOOD ADVICE AND LEAVE YOU WITH BLAST RESIDUE OR SOMETHING.
WARDNER (ALIAS BONEHEAD-I DOUBT IT) SAYS IT ALL IN THE LAST TWO SENTENCES. FIND A SANDBLASTER SERVICE IN YOUR AREA AND HAVE THEM GIVE IT A DECENT BLAST AND PRIME OUT ALMOST THE SAME INSTANT. MAYBE YOU COULD ARRANGE TO SPRAY PAINT IT AT THAT LOCATION A COAT OR TWO.
YOU KNOW THAT NATURALLY OCCURRING RUST PATINA IS SOUNDING BETTER ALL THE TIME.

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D. MAC

05-01-2004 14:14:17




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 Re: Re: ***** Sandblasting? ***** in reply to Wardner, 05-01-2004 08:56:39  
Thanks for advice Bonehead, I mean Wardner!



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Wardner

05-01-2004 16:46:32




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 Re: Re: Re: ***** Sandblasting? ***** in reply to D. MAC, 05-01-2004 14:14:17  
Give me a break, please. My self-administered brain surgery wasn't all that successful. I did save a few bucks, however.

Perhaps you should wait until Paris Hilton logs onto this board. She has recently opened a school specializing in farm repair and equipment maintenance.



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