Does Porter Cable 7424XP normally make grinding noise

gobrigavitch · 06-30-2011, 08:25 PM

I just got a Porter Cable via mail order. I put on the backing plate and turned it on. When on low speed there is a grinding noise inside near the hub. It seems to disappear when the speed is increased. Either that or it gets drowned out. I checked that all screws were tightened and no rubbing. Is this normal or maybe I'm doing something wrong or did I get a dud

jopa489 · 06-30-2011, 09:23 PM

I think what you're describing is normal. You're probably hearing the gears at low speeds but it gets drowned out by the motor at higher speeds.

gobrigavitch · 06-30-2011, 11:55 PM

Thank you. I did some searching on detailingworld and it sounds like it's normal. Man I'm surprised there is not more posts about it because if you aren't used to it it sounds like something is wrong.

BMWsky · 07-01-2011, 08:30 AM

I remember thinking the same thing when I first got mine, I could've sworn something was wrong with it. 3 years later and I don't even notice it anymore.

06-30-2011, 08:25 PM	#1
gobrigavitch Private First Class 22 Rep 197 Posts Drives: '09 E90 M3 JZB Join Date: Aug 2010 Location: Prince Albert, SK iTrader: (0)	Does Porter Cable 7424XP normally make grinding noise I just got a Porter Cable via mail order. I put on the backing plate and turned it on. When on low speed there is a grinding noise inside near the hub. It seems to disappear when the speed is increased. Either that or it gets drowned out. I checked that all screws were tightened and no rubbing. Is this normal or maybe I'm doing something wrong or did I get a dud
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06-30-2011, 09:23 PM	#2
jopa489 Major General 122 Rep 6,594 Posts Drives: Anything with Wheels Join Date: Mar 2009 Location: USA iTrader: (9)	I think what you're describing is normal. You're probably hearing the gears at low speeds but it gets drowned out by the motor at higher speeds. __________________ X7 LCI // Incoming C7 ZR1 ZTK // Sebring + TRX // Hydro + Raptor Gen1 Roush // Tuxedo
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06-30-2011, 11:55 PM	#3
gobrigavitch Private First Class 22 Rep 197 Posts Drives: '09 E90 M3 JZB Join Date: Aug 2010 Location: Prince Albert, SK iTrader: (0)	Thank you. I did some searching on detailingworld and it sounds like it's normal. Man I'm surprised there is not more posts about it because if you aren't used to it it sounds like something is wrong.
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07-01-2011, 08:30 AM	#4
BMWsky Major 24 Rep 1,244 Posts Drives: 335i Join Date: Dec 2010 Location: Webster NY iTrader: (1)	I remember thinking the same thing when I first got mine, I could've sworn something was wrong with it. 3 years later and I don't even notice it anymore.
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