[Crw-talk] Vacuum chucking questions

[Egan, Richard]

John:

I was given a HVAC pump and tried it, but it didn't seem to work that well, and it got pretty warm after running a while. I don't usually run a pump more than the few minutes it takes me to finish off a bowl bottom, but your needs may differ. I bought a used pump off ebay which works well for me. A pump for this purpose has to produce enough CFM to compensate for a less-than-perfect fit, and leakage through the object. It should also allow continuous duty in case you need to run it a while. Some people also advocate some in-line filtering to prevent sawdust from being drawn into the pump.

Rich


-----Original Message-----
From: crw-talk-bounces at crwoodturner.com [mailto:crw-talk-bounces at crwoodturner.com] On Behalf Of John & Donna Griffiths
Sent: Sunday, July 01, 2012 2:02 PM
To: crw-talk at crwoodturner.com
Subject: [Crw-talk] Vacuum chucking questions

Hello all, I have some questions:

How satisfactory are the vacuum devices that run off an air compressor?  
I'm told they are very loud.  Is a vacuum pump a better direction to go?

How reliable are used vacuum pumps?  I see them on eBay for about $45 or so.

Are the pumps used by HVAC technicians to draw the air out of air conditioning systems satisfactory?

John


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