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I'm about to order a 4 x 8 CNC that requires 7 CFM at 110 psi and I'm shopping for a compressor. The compressor is going to live in the shop so I'd like to find something fairly quiet, not sure if it's going to make much difference with the CNC and dust collection running but the quieter the better. I came across this oil less scroll compressor, Would it make any sense to get that with a basic VFD for my needs? I was looking at the Eastwood QST 30/60 but I'm concerned about the issues people have reported and the overall longevity of it. I'm assuming oil less scroll compressors don't have the same problems as screw compressors when it comes to not running them near full capacity.
?
Any advice would be greatly appreciated.
?
Thanks,
Bruce Gordon
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7 CFM?? That seems like a lot for a CNC.? What does it need that
much air for?
FYI, there are a series of previous threads on compressors that
might be worth reviewing:
/g/felderownersgroup/topic/90063767#msg122543
/g/felderownersgroup/topic/75612619#msg126387
On 8/12/2024 10:11 AM, Bruce Gordon via
groups.io wrote:
I'm about to order a 4 x 8 CNC that requires 7 CFM at 110 psi
and I'm shopping for a compressor. The compressor is going to
live in the shop so I'd like to find something fairly quiet, not
sure if it's going to make much difference with the CNC and dust
collection running but the quieter the better. I came across
this oil less scroll compressor,
Would it make any sense to get that with a basic VFD for my
needs? I was looking at the Eastwood QST 30/60 but I'm concerned
about the issues people have reported and the overall longevity
of it. I'm assuming oil less scroll compressors don't have the
same problems as screw compressors when it comes to not running
them near full capacity.
?
Any advice would be greatly appreciated.
?
Thanks,
Bruce Gordon
--
Michael Garrison Stuber
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That's just what the rep told me to shop for when I was at IWF last week. My understanding is that it uses air for tool change as well as some cooling of the spindle. I'm guessing that leaves some safety margin. I did lookup some of the older threads to get some ideas. I think someone was recommending sil-air units for quietness, the closest I found that I think has the recommended CFM would be this maybe, ? A bit pricey but might be worth it, the only other thing I need air in the shop for is Mac's clamps that I have on order.
?
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I have the Sli-Air with 3 pumps, not 6. It works to run my cnc mill for tool changes and a mist coolant system. If the machine you are looking at has continuous spindle purge to keep dust out of the bearings. it might need a decent amount of air.... but 7cfm at 110 psi sounds a bit extreme. I'd ask other users of the same machine, not the salesman that is just going to blurt out a safe, if over kill amount.
Brian Lamb blamb11@... lambtoolworks.com
On Monday, August 12, 2024 at 11:27:06 AM MST, Bruce Gordon <bruce@...> wrote:
That's just what the rep told me to shop for when I was at IWF last week. My understanding is that it uses air for tool change as well as some cooling of the spindle. I'm guessing that leaves some safety margin. I did lookup some of the older threads to get some ideas. I think someone was recommending sil-air units for quietness, the closest I found that I think has the recommended CFM would be this maybe, ? A bit pricey but might be worth it, the only other thing I need air in the shop for is Mac's clamps that I have on order.
?
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My shop Sabre needs 9 @ 100 psi for spindle and ATC. CamMaster is similar. Don’t cheap out on the compressor. I already had a noisy IR 5hp comp when I got the cnc. I’m definitely getting a scroll comp asap because the IR is damn loud.?
I have the Sli-Air with 3 pumps, not 6. It works to run my cnc mill for tool changes and a mist coolant system. If the machine you are looking at has continuous spindle purge to keep dust out of the bearings. it might need a decent amount of air.... but 7cfm at 110 psi sounds a bit extreme. I'd ask other users of the same machine, not the salesman that is just going to blurt out a safe, if over kill amount.
On Monday, August 12, 2024 at 11:27:06 AM MST, Bruce Gordon < bruce@...> wrote:
That's just what the rep told me to shop for when I was at IWF last week. My understanding is that it uses air for tool change as well as some cooling of the spindle. I'm guessing that leaves some safety margin. I did lookup some of the older threads to get some ideas. I think someone was recommending sil-air units for quietness, the closest I found that I think has the recommended CFM would be this maybe, ? A bit pricey but might be worth it, the only other thing I need air in the shop for is Mac's clamps that I have on order.
?
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Eastman 30/60 going?on years now - 5+, can't remember, never had an issue other than external pressure switch required replacement after a reasonable duration for $20 or so. You can probably search my remarks when the topic has come up in the past. It has consistently output the best quality air for our spray finishing and with Shopsabre?IS408 10hp w/ATC, as well as wide belt sander. We have added air receiver tanks to add surge capacity beyond the 100% duty cycle the machine offers for the wide belt's?excessive?blow-off input - it's a Chicago-style? fitting if that gives any indication. It's been terrific, and quiet, and I'd do it all over again.
If I needed more than what one unit could maintain, I'd put multiple scrolls in parallel for added capacity as needed up to the point a screw made more sense, but that's hard to imagine in a normal small woodshop unless you are sandblasting or running multiple air sanders shift-worker style. Screws need to run and are bad at cycling. Scrolls don't care.
My shop Sabre needs 9 @ 100 psi for spindle and ATC. CamMaster is similar. Don’t cheap out on the compressor. I already had a noisy IR 5hp comp when I got the cnc. I’m definitely getting a scroll comp asap because the IR is damn loud.? I have the Sli-Air with 3 pumps, not 6. It works to run my cnc mill for tool changes and a mist coolant system. If the machine you are looking at has continuous spindle purge to keep dust out of the bearings. it might need a decent amount of air.... but 7cfm at 110 psi sounds a bit extreme. I'd ask other users of the same machine, not the salesman that is just going to blurt out a safe, if over kill amount.
On Monday, August 12, 2024 at 11:27:06 AM MST, Bruce Gordon < bruce@...> wrote:
That's just what the rep told me to shop for when I was at IWF last week. My understanding is that it uses air for tool change as well as some cooling of the spindle. I'm guessing that leaves some safety margin. I did lookup some of the older threads to get some ideas. I think someone was recommending sil-air units for quietness, the closest I found that I think has the recommended CFM would be this maybe, ? A bit pricey but might be worth it, the only other thing I need air in the shop for is Mac's clamps that I have on order.
?
-- Brett Wissel Saint Louis Restoration 1831 S Kingshighway Blvd (at Shaw Blvd) St Louis, MO 63110 314.772.2167 brett@...
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I’m definitely looking at that Eastman. Is that 220v single phase? What’s the draw?
On Mon, Aug 12, 2024 at 3:13?PM Brett Wissel via <Brettwissel= [email protected]> wrote: Eastman 30/60 going?on years now - 5+, can't remember, never had an issue other than external pressure switch required replacement after a reasonable duration for $20 or so. You can probably search my remarks when the topic has come up in the past. It has consistently output the best quality air for our spray finishing and with Shopsabre?IS408 10hp w/ATC, as well as wide belt sander. We have added air receiver tanks to add surge capacity beyond the 100% duty cycle the machine offers for the wide belt's?excessive?blow-off input - it's a Chicago-style? fitting if that gives any indication. It's been terrific, and quiet, and I'd do it all over again.
If I needed more than what one unit could maintain, I'd put multiple scrolls in parallel for added capacity as needed up to the point a screw made more sense, but that's hard to imagine in a normal small woodshop unless you are sandblasting or running multiple air sanders shift-worker style. Screws need to run and are bad at cycling. Scrolls don't care.
My shop Sabre needs 9 @ 100 psi for spindle and ATC. CamMaster is similar. Don’t cheap out on the compressor. I already had a noisy IR 5hp comp when I got the cnc. I’m definitely getting a scroll comp asap because the IR is damn loud.? I have the Sli-Air with 3 pumps, not 6. It works to run my cnc mill for tool changes and a mist coolant system. If the machine you are looking at has continuous spindle purge to keep dust out of the bearings. it might need a decent amount of air.... but 7cfm at 110 psi sounds a bit extreme. I'd ask other users of the same machine, not the salesman that is just going to blurt out a safe, if over kill amount.
On Monday, August 12, 2024 at 11:27:06 AM MST, Bruce Gordon < bruce@...> wrote:
That's just what the rep told me to shop for when I was at IWF last week. My understanding is that it uses air for tool change as well as some cooling of the spindle. I'm guessing that leaves some safety margin. I did lookup some of the older threads to get some ideas. I think someone was recommending sil-air units for quietness, the closest I found that I think has the recommended CFM would be this maybe, ? A bit pricey but might be worth it, the only other thing I need air in the shop for is Mac's clamps that I have on order.
?
--
Brett Wissel Saint Louis Restoration (at 314.772.2167 brett@...
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Brett your comments on the threads I've read are one of the main reason's I've not totally discounted an Eastwood 30/60 but I keep running across more negative reviews. Of course, people are more likely to post more negative than those that haven't had any issue. I'm just a bit concerned I'll get a few years down the road, 3 year warranty, and it will crap out. Just for an example, I was watching this guy endorsing them, . He had 3 and in the video he's got nothing but good stuff to say, but if you read his pinned comment at the top, he stopped recommending them because 2 of them had problems. I almost want to 'roll the dice' because the specs are perfect for what I want. I might do it anyway.
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The single phase we have on a 220v 40A circuit.My data sheet says 17 FLA.?
The bigger version is 3-phase, which I would have bought but back in the day we had no other 3-phase equipment in service and didn't want to pay for it. Hindsight is 2020....
I’m definitely looking at that Eastman. Is that 220v single phase? What’s the draw? On Mon, Aug 12, 2024 at 3:13?PM Brett Wissel via <Brettwissel= [email protected]> wrote: Eastman 30/60 going?on years now - 5+, can't remember, never had an issue other than external pressure switch required replacement after a reasonable duration for $20 or so. You can probably search my remarks when the topic has come up in the past. It has consistently output the best quality air for our spray finishing and with Shopsabre?IS408 10hp w/ATC, as well as wide belt sander. We have added air receiver tanks to add surge capacity beyond the 100% duty cycle the machine offers for the wide belt's?excessive?blow-off input - it's a Chicago-style? fitting if that gives any indication. It's been terrific, and quiet, and I'd do it all over again.
If I needed more than what one unit could maintain, I'd put multiple scrolls in parallel for added capacity as needed up to the point a screw made more sense, but that's hard to imagine in a normal small woodshop unless you are sandblasting or running multiple air sanders shift-worker style. Screws need to run and are bad at cycling. Scrolls don't care.
My shop Sabre needs 9 @ 100 psi for spindle and ATC. CamMaster is similar. Don’t cheap out on the compressor. I already had a noisy IR 5hp comp when I got the cnc. I’m definitely getting a scroll comp asap because the IR is damn loud.? I have the Sli-Air with 3 pumps, not 6. It works to run my cnc mill for tool changes and a mist coolant system. If the machine you are looking at has continuous spindle purge to keep dust out of the bearings. it might need a decent amount of air.... but 7cfm at 110 psi sounds a bit extreme. I'd ask other users of the same machine, not the salesman that is just going to blurt out a safe, if over kill amount.
On Monday, August 12, 2024 at 11:27:06 AM MST, Bruce Gordon < bruce@...> wrote:
That's just what the rep told me to shop for when I was at IWF last week. My understanding is that it uses air for tool change as well as some cooling of the spindle. I'm guessing that leaves some safety margin. I did lookup some of the older threads to get some ideas. I think someone was recommending sil-air units for quietness, the closest I found that I think has the recommended CFM would be this maybe, ? A bit pricey but might be worth it, the only other thing I need air in the shop for is Mac's clamps that I have on order.
?
--
Brett Wissel Saint Louis Restoration (at 314.772.2167 brett@...
-- Brett Wissel Saint Louis Restoration 1831 S Kingshighway Blvd (at Shaw Blvd) St Louis, MO 63110 314.772.2167 brett@...
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I bought the California Air Tools "California Air Tools CAT-60040CAD Ultra Quiet 60 Gal Compressor ". Currently $1799 from Amazon with delivery. I've been very happy with it from the time I switched it on. Noise level is quite low. It has plenty of air flow for my ATC CNC.
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To be fair, a blown?start capacitor and an intermittent blow off valve I wouldn't blame the compressor for, HOWEVER, I too have some reservations that things made during post-covid times don't always seem to be as good as before, even though that's anecdotal.? It's entirely possible quality of the finished devices is not what it used to be.
But for comparison, you could replace one of these every few years and still be money ahead on a screw for a long time, assuming the screw didn't have any maintenance needs. Unless there are great screws available for <10k that don't need very regular costly maintenance I'm not aware of.
On Mon, Aug 12, 2024 at 2:34?PM Brett Wissel via <Brettwissel= [email protected]> wrote: The single phase we have on a 220v 40A circuit.My data sheet says 17 FLA.?
The bigger version is 3-phase, which I would have bought but back in the day we had no other 3-phase equipment in service and didn't want to pay for it. Hindsight is 2020....
I’m definitely looking at that Eastman. Is that 220v single phase? What’s the draw? On Mon, Aug 12, 2024 at 3:13?PM Brett Wissel via <Brettwissel= [email protected]> wrote: Eastman 30/60 going?on years now - 5+, can't remember, never had an issue other than external pressure switch required replacement after a reasonable duration for $20 or so. You can probably search my remarks when the topic has come up in the past. It has consistently output the best quality air for our spray finishing and with Shopsabre?IS408 10hp w/ATC, as well as wide belt sander. We have added air receiver tanks to add surge capacity beyond the 100% duty cycle the machine offers for the wide belt's?excessive?blow-off input - it's a Chicago-style? fitting if that gives any indication. It's been terrific, and quiet, and I'd do it all over again.
If I needed more than what one unit could maintain, I'd put multiple scrolls in parallel for added capacity as needed up to the point a screw made more sense, but that's hard to imagine in a normal small woodshop unless you are sandblasting or running multiple air sanders shift-worker style. Screws need to run and are bad at cycling. Scrolls don't care.
My shop Sabre needs 9 @ 100 psi for spindle and ATC. CamMaster is similar. Don’t cheap out on the compressor. I already had a noisy IR 5hp comp when I got the cnc. I’m definitely getting a scroll comp asap because the IR is damn loud.? I have the Sli-Air with 3 pumps, not 6. It works to run my cnc mill for tool changes and a mist coolant system. If the machine you are looking at has continuous spindle purge to keep dust out of the bearings. it might need a decent amount of air.... but 7cfm at 110 psi sounds a bit extreme. I'd ask other users of the same machine, not the salesman that is just going to blurt out a safe, if over kill amount.
On Monday, August 12, 2024 at 11:27:06 AM MST, Bruce Gordon < bruce@...> wrote:
That's just what the rep told me to shop for when I was at IWF last week. My understanding is that it uses air for tool change as well as some cooling of the spindle. I'm guessing that leaves some safety margin. I did lookup some of the older threads to get some ideas. I think someone was recommending sil-air units for quietness, the closest I found that I think has the recommended CFM would be this maybe, ? A bit pricey but might be worth it, the only other thing I need air in the shop for is Mac's clamps that I have on order.
?
--
Brett Wissel Saint Louis Restoration (at 314.772.2167 brett@...
--
Brett Wissel Saint Louis Restoration 1831 S Kingshighway Blvd (at Shaw Blvd) St Louis, MO 63110 314.772.2167 brett@...
-- Brett Wissel Saint Louis Restoration 1831 S Kingshighway Blvd (at Shaw Blvd) St Louis, MO 63110 314.772.2167 brett@...
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Brian, as for the numbers I was quoted, I believe I was talking to one of the company owners. The CNC I'm looking at is a Legacy Maverick 4x8, small company out of Utah, . Waiting for a call back now to verify, I can't find any user forum links.
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Possilby consider a Quincy with a 325 pump.? Operating at around 700 rpm it's not very loud. Dave Davies
Brian, as for the numbers I was quoted, I believe I was talking to one of the company owners. The CNC I'm looking at is a Legacy Maverick 4x8, small company out of Utah, . Waiting for a call back now to verify, I can't find any user forum links.
-- Dave & Marie Davies
318-219-7868
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Spindle is made by Hiteco, a pretty. common supplier. They have air blast during tool change as well as constant lower volume air for keeping dust out the labyrinth seals. I know that a lot of those style units have adjustment for air flow as well, so you shouldn't have to have huge amounts of CFM. You can probably get by with a smaller compressor and an 80 gallon receiver... that way you have reserve for rapid/quick tool changes.
I've recommended the Eastman units and so far haven't heard any bad, although I did read some of those reviews that said they had issues. Might have been a bad batch of components during covid for all I know.
The scroll compressors are supposed to be good, and run a lot of hours before tips seals need to be replaced. I would not ever recommend a rotary vane.... maintenance nightmares and don't last long unless they are running at 80% plus of full capacity.
If I replace my old piston compressor, an I/R but it's not the slow speed pump.... I would go with a Champion, I like their integral head/cylinder design and they run so slow that the sounds isn't very bothersome. My son found two of them and has set them up in tandem for emergency purposes in case one goes down. He's running 3 CNC machines and numerous air tools for deburring.
Brian Lamb blamb11@... lambtoolworks.com
On Monday, August 12, 2024 at 12:42:52 PM MST, Bruce Gordon <bruce@...> wrote:
Brian, as for the numbers I was quoted, I believe I was talking to one of the company owners. The CNC I'm looking at is a Legacy Maverick 4x8, small company out of Utah, . Waiting for a call back now to verify, I can't find any user forum links.
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Brian, something like this, ?
?
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I’ll second the vote for Quincy. ?
David Best
DBestWorkshop@...
https://www.flickr.com/photos/davidpbest/collections/
https://www.youtube.com/@David_Best
toggle quoted message
Show quoted text
On Aug 12, 2024, at 12:56?PM, David Davies via groups.io <myfinishingtouch@...> wrote:
Possilby consider a Quincy with a 325 pump.? Operating at around 700 rpm it's not very loud. Dave Davies Brian, as for the numbers I was quoted, I believe I was talking to one of the company owners. The CNC I'm looking at is a Legacy Maverick 4x8, small company out of Utah, . Waiting for a call back now to verify, I can't find any user forum links.
-- Dave & Marie Davies
318-219-7868
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That one looks pretty large, probably don't need 7.5hp and three phase. Here is a brand new one specified out like I would want. You can always go 5hp three phase and spend about $300 on a VFD to run it even slower and softer start, that's what my son did on his. His was a like new pump, but had a bad tank. It had the special sound enclosure as well, so once he cleaned it all up and re-did the sound proofing on the inside, it runs really nice. Couple pictures down below.
Brian Lamb blamb11@... lambtoolworks.com
On Monday, August 12, 2024 at 02:21:55 PM MST, Bruce Gordon <bruce@...> wrote:
Brian, something like this, ?
?
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The Quincy QR series are the top line and known for their robust construction and valve design.? I rebuilt a couple of used ones which was pretty simple and my 325 used puts out about 15 cfm and runs at about 700 rpm.? The QR design allowed you to slow the
pump to about 400 rpm and had a wider operating range than most pumps.? The slow put-put-put is not annoying to my hearing aids and my total cost for the pump, tank, motor, and rebuild kit was about $1000 and some time.
Dave
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Show quoted text
I’ll second the vote for Quincy. ?
David Best
DBestWorkshop@...
https://www.flickr.com/photos/davidpbest/collections/
https://www.youtube.com/@David_Best
On Aug 12, 2024, at 12:56?PM, David Davies via groups.io <myfinishingtouch@...> wrote:
Possilby consider a Quincy with a 325 pump.? Operating at around 700 rpm it's not very loud.
Dave Davies
Brian, as for the numbers I was quoted, I believe I was talking to one of the company owners. The CNC I'm looking at is a Legacy Maverick 4x8, small company out of Utah,
. Waiting for a call back now to verify, I can't find any user forum links.
--
Dave & Marie Davies
318-219-7868
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David, the idea has merit but I'm not sure I want to invest the time and energy in locating one and then rebuilding it, not something I've got experience with. But I like the idea enough that I'll widen my search to include one and spend some Google searching on it.? Thanks!
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"The bigger version is 3-phase, which I would have bought but back in the day we had no other 3-phase equipment in service and didn't want to pay for it. Hindsight is 2020...."
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As I was listening to my not so "Ultra Quiet" 75 db California Air 4HP, 20 gal cycle once again, I started to think about upgrading to an Eastwood. ?I searched the forum, as I remembered reading about Eastwood, with this being the first time I read something negative.
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What impressed me about the Eastwood is that they are at 62-63 db, which is way more ultra quiet than my current compressor. ?I know of no other compressor that quiet other than something like a Kaiser that has the drawbacks as others mentioned when not used big time.
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For the Eastwood, I would think the 30/60 would be a better choice for me than the 80/120. ?Same db. ?I do not need the extra CFM. ?I would save money and space. ?However, I would only want to cry once. ?So, does anyone have any reason to think the 80/120 would be a better choice as far as reliability? ?
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Bruce Gordon
David P. Best