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Old 03-13-2009, 10:40 AM
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CP870 DA Sander

Hi guys, I just bought this:

Chicago Penumatic cp870



with the intention to use it to do some stripping and what not. This weekend I got a chance to try it out and there is absolutely no torque to it. I can put the sander on my palm and pull the trigger and it wont turn it produces so little torque. There is a screw on the side with an arrow that seems to control the air flow, but I have tried adjusting that to max and it still produces no torque. I opted for this one over a less expensive harbor frieght one thinking it would perform much better, but my 9.99 harbor frieght sander is much better than this. Does anyone else have any experience with these sanders? I have it hooked up to my compressor at 125psi, althoguh the gun only reccomends 90psi.

Thanks,

-Joe

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Old 03-13-2009, 10:50 AM
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Unfortunately the quality control is not real good on those so you can get a good one or sad to say a bad one..take it back and get another one as they should work fine out of the box..

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Old 03-13-2009, 11:25 AM
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Chigago Electric (Chinese) is not a brand name, it is simply Harbor Freight's attempt at name recognition to Chicago Pneumatic which is a brand name. The unfamiliar will think it's a brand name tool.

Vince
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Old 03-13-2009, 11:38 AM
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You may be thinking you have a direct drive sander ,,that is a dual action , It can be locked to grind & unlocked to sand .
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Old 03-13-2009, 12:14 PM
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Oh I'm really sorry, I didn't mean to type Chicago Electric, Its a Chicago Pneumatic that I did not buy at HF. I was looking for some type of sander to strip paint. I already own a DA, but wanted a rotary, but after reading on the forums, these Dual Action sanders which spin as well as do little circles seem to be good at stripping.
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Old 03-13-2009, 02:33 PM
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As mentioned if that is a DA sander it will have very little torque unlocked.

Vince
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Old 03-13-2009, 03:11 PM
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Be careful with it using it locked. They will remove lots of material in a localized area if not careful. What size compressor air delivery do you have. That thing probably needs 8-10 CFM, way more than a 5 HP WalMart or Sears compressor can deliver.
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Old 03-13-2009, 03:43 PM
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3/8" Air fittings throughout the air compressor system should help as well.
I just bought a few fittings I was going to try tonight, but the GF decided stranding me at home was a better idea.
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Old 03-13-2009, 05:24 PM
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my compressor is definitely not a problem, its a 120gal one. Airflow is fine, I use a lot of air tools. Oh and I bought it to strip paint off the panel ^ so I want it to remove a lot of material fast.
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