10 HP, Ingersoll Rand Type 30 Model 71T2

[Rick D]

Hi all.

I’m looking to pickup a compressor that will allow me to do some automotive painting and sandblasting…two pretty CFM intensive operations. I found an older type 30 model 71T2 online with a 10HP motor. I cannot find CFM specs anywhere but this site had a post that said it’s roughly 4 CFM per HP. Yet when I look at smaller HP setups they’re around 10 to 11 CFM for 5 HP so not the 4 to 1 I heard mentioned. I’ve been told I want a minimum of 20 CFM for painting and blasting…would you folks agree? Is the compressor I’m looking at a good model? Anyone know for certain what CFM it supports?

Thank.
—Rick

 

[Walkers]

Generally the t-30 is somewhere around 24cfm running on a 7.5 horse motor. You can actually go on their website and download a manual for the older t-30s, it really helped me when putting together my basket case t-30 compressor.

 

[walta]

You understand that 99.9 % of 10 HP motors will be 3 phase?

You understand that if you are going to use this at home over 90% of home do not have 3 phase power and the power company will not allow any motors over 7 HP on a home service?

35 CFM sounds right if it is 2 stage.

Seems like 10 HP is over kill for painting and marginal if you want to really do sand blasting.

If you want to really do sand blasting find a 40 HP gas power trailer compressor.



Walta

 

[stonesfan68]

It should be around 35 CFM at 125 PSIG. They are great compressors. They aren’t made anymore but you should be able to still get parts for them. I’d call my local distributor and see if they can send you the engineering data sheets. My memory is fuzzy, but I think 10HP is the minimum horsepower. You’d definitely need a phase transformer or big VFD to drive it at a home shop.

 

[jar944]

and the power company will not allow any motors over 7 HP on a home service?



Walta

*maybe*

And Only if you tell them.

 

[mike93lx]

A "5hp" compressor putting out only 10scfm is as much 5hp as my shop vac is 6.5hp

 

[Wrench97]

Painting does not require anywhere near 20 CFM 10-12 is all you'll need.
Sand blasting is another story, which sand blaster model are you looking at?
Small blast cabinets will use 7-10 CFM while larger industrial set ups can use 100+ CFM.

 

[Rick D]

Thanks all for the input. I need to blast the frame of my truck as the CT roads in the winter are decimating the frame after only 10 years. Very frustrating. So my need is a bit bigger than what a cabinet provides. Also, I will be painting my project car and everything I’ve read says 20CFM minimum is necessary for a full car paint and clear. If someone here can recommend a smaller unit that will get both of the above done, I’d love to hear it.
As far as the electrical goes, I know little about electrical. I was hoping I could run it of my 10KW generator and an electrician could do the hookup. Doesn’t sound that simple though.

 

[brianpgriset]

*maybe*

And Only if you tell them.

Ditto. 7.5hp motor for my Quincy at two different houses now. No issues for the last 10 years. Does dim the lights a bit when it kicks on.

 

[joe_padavano]

I have a single phase Baldor 7.5 hp motor driving my 23.5 CFM Rolair compressor. No issues and plenty of capacity for media blasting and high-use air tools.

 

[PoorUB]

I have done a fair amount of sand blasting with a 3 HP compressor. Yes it was a bit short. For a hobbyist situation 5 HP 80 gallon will get you by quite well. You will to take a break every few minutes, bit IMO, you will want to take a break anyway.

 

[evintho]

I have a 5hp 80gal IR that puts out 18 cfm. I've painted several cars with it and have done quite a bit of blasting too. Blasted a couple of different frames using a quality pressure pot blaster. Never had to wait for it to catch up. Blasting does use a lot of air, though. If you can swing it, a 2 stage 7.5hp will fill the bill nicely and you'll never have to worry about air again!

https://www.northerntool.com/products/quincy-qt-7-5-splash-lubricated-reciprocating-air-compressor-7-5-hp-230-volt-1-phase-80-gallon-vertical-model-271cs80vcb-35239003?cm_mmc=Google-pla&utm_source=Google_PLA&utm_medium=Air%20Tools%20%2B%20Compressors%20%3E%20Air%20Compressors%20%3E%20Stationary%20Electric%20Air%20Compressors&utm_campaign=Quincy%20Compressor&utm_content=35239003&ogmap=SHP%7cPLA%7cGOOG%7cSTND%7cc%7cSITEWIDE%7cOOT%7c%7c%7c%7c168362036%7c8707133156&gclid=Cj0KCQjwgNanBhDUARIsAAeIcAtGX9D2USzPWE_aGiQppDXqYBTeLfUQRXHdeAB8V8HnkXEVhlAgcKsaAvy0EALw_wcB&gclsrc=aw.ds

 

[benchracer1]

I have a ir 71t2 compressor and it is a beast. It was originally three phase but I converted to a 7.5 baldor single phase. 4 years and no problems. I run a blast cabinet and paint cars. I've done some outdoor blasting and would occasionally have to let the compressor catch up but it would do the job. I've since then relegated large blasting jobs to the local blasters. Do get a magnetic start switch for it. From what I'm reading that should be an excellent compressor for you. Recently mine has started bleeding of pressure overnight. Not sure if there is a check valve or if the concentric rings seal backlog. Guess that is next to fix....Steve

 

[benchracer1]

Fyi.. I figured that I'm putting out about 26 to 28 cfm