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4" grinder . Flap vs solid #5083908 04/23/19 04:12 PM
Joined: Dec 2012
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WhyMe Online Content OP
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Joined: Dec 2012
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been a while since i have bought a grinding wheel for my 4" hand held. So i noticed that there are flap wheels now. reading about them they seem to be better than the old style. So is this true? i use mine mainly for sharpening my lawnmower blade .

Re: 4" grinder . Flap vs solid [Re: WhyMe] #5083914 04/23/19 04:18 PM
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das_peikko Offline
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If you're going to be using them to sharpen mower blades, you'll want the flap disc most definitely.

Re: 4" grinder . Flap vs solid [Re: WhyMe] #5083921 04/23/19 04:24 PM
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Blkstanger Offline
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I prefer the flapper discs.


99 Jeep WJ 4.7 200,000mi. Maxlife 10w30, Fram Ultra.
15 Ford Escape S 2.5
Re: 4" grinder . Flap vs solid [Re: WhyMe] #5083933 04/23/19 04:31 PM
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justintendo Offline
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stick with a good stone for fine work like sharpening. the flap wheels work well for surface prep like finish removal or smoothing metal/removing scratches.


13 escape 2.0 awd mobil 1 10w30ep
08 fusion 2.3 mtx mobil 1 5w30ep/redline mt90
96 f150 4.9 2wd mtx mobil 1 10w30hm/redline ps fluid
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many husqvarnas 5w40 t6 rotella
Re: 4" grinder . Flap vs solid [Re: WhyMe] #5083987 04/23/19 05:24 PM
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maxdustington Offline
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Flap wheel: More expensive, less durable, much better finish in the right hands.


97 GMC RCLB K2500LD L30/4L60
Re: 4" grinder . Flap vs solid [Re: WhyMe] #5083991 04/23/19 05:31 PM
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tig1 Offline
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There are uses for both.


2007 Ford Fusion 248,000 miles
M1 5-20HM
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MC filters

Re: 4" grinder . Flap vs solid [Re: WhyMe] #5084002 04/23/19 05:48 PM
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andyd Offline
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I sharpen mower blades on the bench grinder if they're chewed up. Sharpening is a less is more thing grin2


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1994 Ranger ,the Rat, 5w30 dino, STP filter

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Thick oil is better grin2
Re: 4" grinder . Flap vs solid [Re: WhyMe] #5084051 04/23/19 06:44 PM
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double vanos Offline
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I just used a good file to sharpen my mower blades.


Sabine Schmitz is the Queen of the 'Ring; Svetlana Kapanina is the Queen of the SKIES...
Re: 4" grinder . Flap vs solid [Re: WhyMe] #5084068 04/23/19 06:56 PM
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tom slick Offline
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I prefer a flap wheel for sharpening mower blades and most other grinding tasks. If you need something flat with crisp edges then a hard grinding disc works better.


You get what you pay for...
So keep in mind how much you paid for this advice.
Re: 4" grinder . Flap vs solid [Re: WhyMe] #5084080 04/23/19 07:04 PM
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Trav Offline
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Flap


ASE L1, Master. Deutsch Meisterbrief.
Re: 4" grinder . Flap vs solid [Re: WhyMe] #5084112 04/23/19 07:33 PM
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JLawrence08648 Offline
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Wow! I can't believe the number of flap disk recommendations for sharpening mower blades. I use a grinding disk on my power hand grinder for sharpening blades. I only use the flap disk for removing rust from equipment. For removing rust, I use a wire brush on a grinder then switch grinders to the flap disk.

Re: 4" grinder . Flap vs solid [Re: WhyMe] #5084128 04/23/19 07:45 PM
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Rand Offline
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I have always used a metal or fast metal wheel on the angle grinder for sharpening mower blades.. usually they are pretty far gone from many hours of nasty field mowing, hitting anthills etc.

How is the flap wheel better?

Last edited by Rand; 04/23/19 07:46 PM.

2019 Jeep Cherokee Trailhawk 2.0T
2020 Hyundai Elantra "Value Edition"
Re: 4" grinder . Flap vs solid [Re: WhyMe] #5084138 04/23/19 07:59 PM
Joined: May 2010
Posts: 10,520
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spasm3 Offline
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I use a angle grinder with grinding wheel not a flapper for mower blades.


13 elantra 78k 5w30 synpwr
03 chevy avalanche 83k synpwr 5w30
17 mazda cx-5 16400 miles m1 0w40
Re: 4" grinder . Flap vs solid [Re: WhyMe] #5084188 04/23/19 09:09 PM
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tom slick Offline
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Flap discs are more aggressive and load up less yet leave a smoother finish. As a bonus they are significantly quieter.


You get what you pay for...
So keep in mind how much you paid for this advice.
Re: 4" grinder . Flap vs solid [Re: WhyMe] #5084190 04/23/19 09:12 PM
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Dinoburner Offline
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Tried both and 4in stone is faster esp on bushhog blades. Removing the 22in blade on the mower and draining the oil at the same time works here. Also balancing blades is important.


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95 GMC 4wd mobil syn
2016 Equinox LTZ V6 dealer
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