mibro cutting disk

i was out in the shop using my grinder and i grabbed a brand new cutting disk and put in on my grinder and cut to very small pieces of pipe and as i was about to turn it off the disk shattered into 100 pieces and flung everywhere. it cut my finger open pretty bad. this is now the second time i have had this brand have a disk come flying apart on my. do not use these if you have any just throw them away and buy dewalt. i bought them and tractor supply. i am going to be contacting the company on monday.

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i use dewalt or some high quality ones. check the specs on your grinder and make sure you are within the safe limits for RPM on the wheel. that may be your problem. either way its unacceptable

they might not be rated for the rpms your grinder puts out

That's the first thing I checked for after the first one and everything checked out fine. So I figured the disk was messed up and just continued on. But apparently not

poor quality, defective.. you could probably file a law suit if you wanted to. i would just call them and give them an earful. maybe youl get some free stuff out of them.. lol

I plan on it. It easily could have taken my finger off in lucky all it did was what it did to my nail. So they are going to get an earful from me. And if they blow me off ill file a lawsuit

We call them suicide wheels at work for a reason. I've had many of them fail over the years.

I use many cutting wheels, dewalts are the best in my opinion. I picked up a pack of there new "extended life" XP 4 1/2" - .045" wheels today to compare. I'll review them soon.

I've used these for almost if not longer than a year now and had no problem with them.  They may wear a tad faster then the ones we use at work but at the price of them I can't complain. If I had to guess how many I've used I'd say I'm somewhere around 18 to 20, and no issues.

Gotta love dewalt! Best for the price.

redlinemotorsportts wrote:

I use many cutting wheels, dewalts are the best in my opinion. I picked up a pack of there new "extended life" XP 4 1/2" - .045" wheels today to compare. I'll review them soon.

thats what i use. decent life, good, smooth cuts and they dont esplode on ya. DeWalt wheels with a DeWalt grinder

My two favourite cutting wheels are the Walter Zipcut, and the DeWalt wheels. I use 0.045" in both cases, and have the following to offer: Both brands are generally well-balanced and stable, and strong. I used the Walters professionally in the field for about 6 years, and only had one detonate over the use of literally thousands. I'm quite sure the one that blew was my fault anyways.

Between the Walter and the DeWalt, I found that the Walter cuts a bit faster than the DeWalt, but the DeWalt lasts a lot longer. In other words, it will take maybe 15% longer to cut the material with the DeWalt, but it will cute through probably 50% more material before it wears down to a point of uselessness.

never heard of the walter ones. maybe a canada thing

Went and grabbed up a mibro disk today to try.. yeah.. that came apart easily.. i was durablity testing it..
Had welding gloves and welding jacket on.. Exploded in about 5 inches of cutting 1/8th inch steel.. junk..

be glad it didnt kick back on you and attack your arm

willis923 wrote:

never heard of the walter ones. maybe a canada thing

You got me thinking about this. I hit the Walter website, an no- they are an international company. For reference- www.walter.com

Quick note on using these wheels. Any grinding on the side of the wheel will cause them to fail. If you are making a long, or thick cut, be careful to cut straight, and not bind the wheel, or grind on the side of the wheel.

I've used hundreds of them, since work is nice enough to provide them. Made an adapter for a 4 in angle grinder, and use them on that. It gets a lot of use.

Stretch44875 wrote:

Quick note on using these wheels.  Any grinding on the side of the wheel will cause them to fail.

To further push the point- Use the right tool for the right job. Cutting wheels are for cutting, grinding wheels are for grinding. Cut with the direction of wheelspin, not opposing it. Do not force it. Let the weight of the tool do the work.

Doc Sprocket wrote:

Let the weight of the tool do the work.

Hell no.. You do what you have to do I'm pretty guilty of using the wrong tool for the job.. Ive used welders to pop oil can dents because i couldn't find the propane torch... lol

Doc Sprocket wrote:

Stretch44875 wrote:

Quick note on using these wheels.  Any grinding on the side of the wheel will cause them to fail.

To further push the point- Use the right tool for the right job. Cutting wheels are for cutting, grinding wheels are for grinding. Cut with the direction of wheelspin, not opposing it. Do not force it. Let the weight of the tool do the work.

Pipe is tricky too. again keep it in line and your ok. If it starts jumping rethink how youre approaching it

when i bought my grinder i bought a mibro cuttin disk because it was the only one the store had in stock didnt even last 3 cuts of 1" thick pipe before it broke in 5 parts i use skill or Dewalt skill cuts alot faster and are very strong havnt broken one yet and ive used them all the way to the stub where i couldnt get the grinder in to cut the metal lol there great cutting disk but dewalt last alot longer

TroyBilt Pony wrote:

Doc Sprocket wrote:

Let the weight of the tool do the work.

Hell no.. You do what you have to do :DI'm pretty guilty of using the wrong tool for the job.. Ive used welders to pop oil can dents because i couldn't find the propane torch... lol

hell, me and one of my friends used a miller AC/DC 300 amp stick welder with 6013 rods, turned up all the way, to cut metal. we didnt have oxy/acetlene or a plasma cutter, and a grinder would have been painfully slow, so we used the stick welder

this right here, is the sole reason i do not buy cheap, sh***y wheels. my face hurts just thinking about it... PPE guys, they make it for a reason. wear it.

willis923 wrote:

this right here, is the sole reason i do not buy cheap, sh***y wheels. my face hurts just thinking about it... PPE guys, they make it for a reason. wear it.

We run cut off wheels all day long where I work,  we run cheap tool sale ones to very expensive ones, cutting thin mild steel to thick stainless steel, and in the 10 years I've been there we only had one come apart.  It was one of our expensive metabo ones.  The operator knocked it off of a chair, picked it up and saw the disk had a slight bend/crease on it.  He went ahead and fired up the tool and off came 1/2 the wheel and to this day the 1/2 that came off is still stuck in the insulation on the shop ceiling. The ceiling is over 25 ft off the floor, it is a good example for newbe's on proper tool usage and common sense.

Like others said, let the tool do the work, hold it 90* to the object to be cut, cut in a straight line (don't twist the cutoff wheel), don't slam the wheel into the part being cut, don't drop it, don't drag the tool and wheel across a floor by cord or hose, INSPECT ALL WHEELS EACH TIME PRIOR TO USE.

Like I said in an earlier post I've ran many of these mibro disk and never had any issues or complaints with them.  I also have 25+ sitting on a self just waiting to be used and ill have no worries about using them.

I do agree 100% with your PPE statement. We got a sign at work that says "PPE to be worn - Common sense to be used- At all times in the shop.

muddstir wrote:

We run cut off wheels all day long where I work,  we run cheap tool sale ones to very expensive ones, cutting thin mild steel to thick stainless steel, and in the 10 years I've been there we only had one come apart.  It was one of our expensive metabo ones.  The operator knocked it off of a chair, picked it up and saw the disk had a slight bend/crease on it.  He went ahead and fired up the tool and off came 1/2 the wheel and to this day the 1/2 that came off is still stuck in the insulation on the shop ceiling. The ceiling is over 25 ft off the floor, it is a good example for newbe's on proper tool usage and common sense.

Like others said, let the tool do the work, hold it 90* to the object to be cut, cut in a straight line (don't twist the cutoff wheel), don't slam the wheel into the part being cut, don't drop it, don't drag the tool and wheel across a floor by cord or hose, INSPECT ALL WHEELS EACH TIME PRIOR TO USE.

Like I said in an earlier post I've ran many of these mibro disk and never had any issues or complaints with them.  I also have 25+ sitting on a self just waiting to be used and ill have no worries about using them.

I do agree 100% with your PPE statement. We got a sign at work that says "PPE to be worn - Common sense to be used- At all times in the shop.

You make some great points, although I always chuckle when someone uses the phrase "common sense". I call it "uncommon sense", because it seems to be in short supply. Some doof dumps a hot coffee in their lap, sues, gets a wicked settlement, and from there on in, every hot beverage cup says, "Caution HOT!". If sense were common, we wouldn't have this. Brings Bill Engvall to mind.

As for the guy that blew the crap out of that cutting wheel- same deal. No sense. The moment the grinder fell off the bench, that wheel should have been discarded. Sad part is, all cutting and grinding wheels bear a warning label that TELLS you this. No excuse.