4.5" cutting discs, grinding wheels, and flap discs... what works best for you? - JeepForum.com
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Go Back JeepForum.com > General Technical Discussions > Fabrication Shop > 4.5" cutting discs, grinding wheels, and flap discs... what works best for you?

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Unread 03-14-2009, 10:23 PM   #1
flatlander757
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4.5" cutting discs, grinding wheels, and flap discs... what works best for you?

Figured I'd start this thread as up 'til last night I was using all HF cutting wheels, flap discs, and grinding wheels as that's what I bought when I got my cheap $20 grinder. Got some different grinding wheels and they work SO much better!

The HF cutting wheels I have had excellent luck with, never shattered one yet, but have frayed the edges a few times when they "grab." I'll usually stop and inspect the wheel for serious damage first, if it's just a small nick taken out I'll use it for a few seconds on an easy-to-get-to area so smooth it down and even it all out. I go through them semi-quickly, but they're cheap enough to not bother me.

The HF flap discs I honestly haven't used too terribly much, but they haven't lasted very long IMO, they seem to smooth out really quickly and then take forever to do any work. Especially the lower-grit discs.

The HF grinding wheels are what I had my biggest gripe with. I cut the brackets off my rear D70 awaiting installment under my TJ and had a LOT of grinding to do. All last weekend and during the week this week I was using those wheels and probably put about 12 hours of grinding into the axle to get the brackets close to flush w/ the tubes. I got only one side somewhat done.

So I was at wally world yesterday and picked up a few Black and Decker grinding wheels just to try them out.

The work SO much better, I spent about 3 hours this morning and had my rear axle completely clean and flush. I probably ground more material off in those 3 hours than I did all week. Definitely recommend these over the HF wheels.

Given that experience, I just picked up some Black and Decker cutting discs just to try out. Haven't used them yet, but the only thing that concerns me is that the center section is raised so I won't be able to slide the disc in as far as the HF discs, also they are about 1/8" thick VS maybe 1/16" thick for the HF. Will report back after I give them some use.

Anybody else recommend some good stuff?

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Unread 03-14-2009, 10:34 PM   #2
Unlimited04
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as i've said here many times...i've got 4 HF cheapo grinders (one has bad bearings). Theres four because there are four tools you need, a cutting disc, a grinding disc, a tigerdisc and a wire wheel. I just plug them all into a powerstrip on an extension cord and pick up whichever I need.

I hate stopping to change discs, it takes a lot of time when you're in the groove and just want to keep moving. the HF flap/sanding discs SUCK. I buy the original Tiger Disc, they are A LOT more expensive, but they last a lot longer and give a better finish. The HF cutting discs and grinding discs have been fine for me, they are basically disposable and you buy them in big packs. I've got a stack of them.
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Unread 03-14-2009, 11:45 PM   #3
spd500
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I buy a brand called Pferd from the welding supply , but have used different brands from time to time . It does seem that the higher quality discs will save you some time when you are doing alot of grinding , and they also last longer . But really the only reason I buy the ones from the welding supply is because I am always there and the owner of the place is a really good guy that takes care of me . The owner of my welding supply lives onsite and has opened well after hours in the past to let me get supplies when I really needed them . If the discs he carried were junk I would probably still buy them from him .
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Unread 03-16-2009, 01:10 AM   #4
FortCollinsZJ
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I have used the 4.5 cut-off discs from HF. they don't last long at all! I now use Dewalt flap discs and whatever brand Home Depot has for cut off, and Forney wire wheels.

BTW, I lost the arbor nut and back washer spacer part for my grinder, anyone know where I can get one? I cant even find it online. looks like this:
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Unread 03-16-2009, 05:59 AM   #5
rustywrangler
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I run with HD's Norton brand grinding wheels and cutoff wheels. I actually took the time to figure out how long etc they would last. Over HF, the cutoff wheels last about 3 times as long and the grinding wheels about 4 times. I do not know the brand, but I use whatever airgas carries for flap disks. They are not cheap rounded off flap ends, they are squared so you have alot of material on the disk. They work about twice as long as Norton and about 6 times as long as HF.

I also run 3 grinders at once to keep from changing blades.


Quote:
Originally Posted by FortCollinsZJ View Post
BTW, I lost the arbor nut and back washer spacer part for my grinder, anyone know where I can get one? I cant even find it online.
What brand grinder??? HD carries a few universal ones with the flap disks and wire wheel area.
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Unread 03-16-2009, 08:49 AM   #6
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I pretty much use flappers for everything. If I have to cut something, I use the plasma.

I use 60 grit flappers from AA Abrasives. I get the "thick ones" and they usually last several days. I get them with the 5/8"-11 spindle and just spin them on. I also use their Zirconium 3" Rolloc disks on my little 3" angle air grinder for knocking spatter off.
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Unread 03-16-2009, 09:00 AM   #7
Unlimited04
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Quote:
Originally Posted by FortCollinsZJ View Post
BTW, I lost the arbor nut and back washer spacer part for my grinder, anyone know where I can get one? I cant even find it online. looks like this:
just tack a nut on a washer.
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Unread 03-16-2009, 09:18 AM   #8
Bigbob
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Quote:
Originally Posted by Unlimited04 View Post
just tack a nut on a washer.
Oh, that would work good.

Quote:
Originally Posted by FortCollinsZJ View Post

BTW, I lost the arbor nut and back washer spacer part for my grinder, anyone know where I can get one? I cant even find it online. looks like this:
Usually places like Home Depot or Lowes will not have them. If you go to a welding or tool place they usually do. I got a couple at my local welding shop. The spanner wrench I have don't fit, but I seldom use it anyway.
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Unread 03-16-2009, 07:23 PM   #9
FortCollinsZJ
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I would use a nut and a washer, BUT the original one hasa little collar on the back that centers the disk. Ya know?


I'll try my welding shop.
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Unread 03-16-2009, 08:16 PM   #10
Unlimited04
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Quote:
Originally Posted by FortCollinsZJ View Post
I would use a nut and a washer, BUT the original one hasa little collar on the back that centers the disk. Ya know?


I'll try my welding shop.
hmm, all 4 of my HF cheapos have the centering collar on the grinder side...not the screw down arbor. interesting. if its over $5, its not worth it IMHO.

Last edited by Unlimited04; 03-16-2009 at 08:43 PM..
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Unread 03-20-2009, 12:34 PM   #11
100kwj
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If it is a dewalt grinder call black & decker up and they'll send you another one. I've had excellent customer service out of them, even for stuff I lost that wasn't their fault.
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Unread 03-20-2009, 01:24 PM   #12
BPJOOP93
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united abrasives, pfered,norton, camel, they are all pretty good quality. i work for a welding supply store so once and a while i get free samples and let me tell ya you get what you pay for.
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Unread 03-20-2009, 01:26 PM   #13
1 ton yj
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I do not shop for tools at HF or the home improvement places (lowes, home depot ect).

I get all my flap disk from my welding supplier. They are made by Zircomax. They are $7 ea but work better and last a lot longer than the cheapo flap disks. Stuff like cut-off disks that I hardly ever use and air grinder pads I get from bullet industries.
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Unread 03-21-2009, 04:15 AM   #14
j0nesy
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cutting discs (ziz wheels as i have always called them) ... i use cheap ones and i havent noticed the difference between them and the more expensive ones ... brand is SAIGA

Grinding dics ... SRT by Pearl Abrasives company. i swear by these things. i prep a lot E.H. pipe day in and day out. ill go through a cheap disc in a week but the Pearl discs last me two or three months. They are the ONLY grinding disc i will use.

Flapper discs ... i have had good luck with dewalt brand and i use them in a pinch ... but i prefer the Pearl Abrasives SRT flapper discs ...

PearlAbrasives.com ... the SRT discs are orange.
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Unread 03-17-2011, 05:05 PM   #15
00JGC00
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Does anyone use wire brush wheels/discs or are flap discs the better route?
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