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Help me choose an air compressor for sandblasting and shop.


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#181 MH81 OFFLINE  

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Posted February 27, 2011 - 09:22 PM

Glad you're making headway, you're getting lax on the pics tho...

Just kidding, I think this is going to be one serious air making machine.

#182 olcowhand ONLINE  

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Posted February 27, 2011 - 09:53 PM

George is a huge believer in "Go Big Or Go Home"! :D Wait a minute, he is home & he's still going big! :rofl2:

#183 NUTNDUN OFFLINE  

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Posted February 28, 2011 - 05:59 AM

Glad you're making headway, you're getting lax on the pics tho...

Just kidding, I think this is going to be one serious air making machine.


I promise I will post more pics, especially after the motor gets here today :D

#184 NUTNDUN OFFLINE  

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Posted February 28, 2011 - 05:59 AM

George is a huge believer in "Go Big Or Go Home"! :D Wait a minute, he is home & he's still going big! :rofl2:


How about, accidentally went big and just happened to be home? LOL

#185 NUTNDUN OFFLINE  

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Posted February 28, 2011 - 08:29 AM

I just checked on the status of the motor starter and it is supposed to be delivered today via usps and the motor is out for delivery with ups :D :thumbs:

Sounds like we will have some wiring to do tonight :D

#186 olcowhand ONLINE  

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Posted February 28, 2011 - 09:55 AM

WOOHOO....won't be long! :dancingbanana::dancingbanana::dancingbanana::dancingbanana:

#187 NUTNDUN OFFLINE  

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Posted February 28, 2011 - 10:02 AM

I will at least be able to get it wired up for the most part and check to make sure the rotation is right. I did a will call order for the pressure switch, safety valve and manifold. I don't know how long it takes Grainger to get stock from other stores to fill orders but I imagine it isn't as fast as advance auto does where it is usually next morning. I still gotta wait till the pulley gets here and then get the right belts. Might be able to fire it up for the first time by next weekend.

#188 RailmanB110 OFFLINE  

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Posted February 28, 2011 - 12:05 PM

How many, & what size/type belts are you planning to run? AX, BX, or...? A's = 1/2", B's = 5/8". Is the pump pulley 5/8" at the outside? The pulley you ordered will do both.

#189 NUTNDUN OFFLINE  

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Posted February 28, 2011 - 12:09 PM

I planned on running two belts and the B size but when I put the one AX belt on the flywheel it sets flush at the top so I don't know if a 5/8" belt would work with the flywheel.

#190 RailmanB110 OFFLINE  

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Posted February 28, 2011 - 12:26 PM

It doesn't sound like B belts will work on your pump. I would run two AX belts. With a 7 3/4" drive pulley, the torque load on the belt goes way down. My 5hp, 1740, 17 cfm @175 has one std "B" belt, starts up in an instant, does not slip or squeel, & has not been adjusted in the 6 years I've had it. I bought it used, & it's about 10 years old.

The point is, two AX belts will do the job wiith no problem. It will also effectively make the drive pulley a tad smaller, resulting in less motor amp draw. The biggest difference will be that the AX belts will result in less hp loss due to friction. The big motor pulley also helps a lot, because the belt doesn't have to be flexed as severely.

If you go back to the Grainger belt spec link I posted earlier, it will explain the hp/pulley/belt ratings better than I can here.
Joe

#191 RailmanB110 OFFLINE  

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Posted February 28, 2011 - 12:30 PM

It would help to know what rpm, & pulley size the previous owner ran on that compressor, or maybe what the bore/stroke specs are on the pump. I would still consider running two, or possibly one belt, if it's the right belt, with a big motor pulley. What is the pulley size on the pump? It's kinda hard to scale from the picts without a reference to scale to. If you run a big motor pulley. Here's a little info on what's available in belts from Grainger: http://www.grainger....nce Guide-_-Top

The hp ratings for the BX belts are substantiallly higher than std B belts. They reduce HP loss due to needing fewer belts, & are also more flexable. If you look at the 6.20" pulley size rating (11.34 hp), it gives about 2 hp more more belt for 1 belt than a std B belt. I would think the difference would be even greater in cold outside temps.
The other higher rated VX belts would most likely require a change of pulley's. I have a 60hp gang rip saw that runs 5 or 6 of the VX type. I't pretty amazing how much power they can handle. They are smaller than the BX but very strong. Unfortunately, they are a different pitch.
Joe


This was post 95 a few pages back.
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#192 NUTNDUN OFFLINE  

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Posted February 28, 2011 - 01:00 PM

I checked the tracking number and the motor was delivered :D

Hopefully the starter box gets here today also and I can get some wiring done. I am going to get the motor put in place and get the centerline dimensions of the motor and pump and use the one calculator to get the belt size I will need so I can get those ordered.

#193 NUTNDUN OFFLINE  

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Posted February 28, 2011 - 07:18 PM

Alright guys. Going to need help with the wiring. I will post the pics now from my phone and then reply from the computer.

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#194 NUTNDUN OFFLINE  

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Posted February 28, 2011 - 07:20 PM

Ok more pics. It would only let me do 5 at a time.

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#195 NUTNDUN OFFLINE  

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Posted February 28, 2011 - 07:24 PM

Now that I am at the computer I will try and explain a little more. We need help, like wiring 101 for dummies LOL. We opened the lid to the motor starter box and were like :wtf:

Got the motor set in place and also got the box mounted on the wall. Going to stop at Lowes tomorrow and get the knockout fittings and sealtite we need to run the wiring and the conduit down to the box from the ceiling.

A color coded diagram would be awesome LOL




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