[BHP] Angle Grinder Usage: Directing Sparks Away for Safety and Better Visibility

Question

Hello. By accident, I came across a newspaper article that instructed the use of an angle grinder in such a way that the direction of rotation of the disc would cause sparks to be thrown forward. Somehow I have never met someone from my friends to hold an angle grinder in such a way as if he was...

noel200 · Answer

I have tried this several times. With my left hand, holding the grinder, I couldn't actually cut. Unless to change the direction of rotation in the grinder.

jaga134 · Answer

Changing the direction of rotation in the grinder is not a problem. But ... I myself witnessed how an employee working with a grinder set up in this way, cutting a 1.5 inch pipe in a fence, received a blow to the head with such a grinder. Just a momentarily locked shield tossed the device upwards and caused an accident. If the disc was spinning in the right direction, the grinder would jump forward, but it would be easier to hold. In my opinion, I do not advise you to do such a modification.

heniek07 · Answer

I support col. Jaga134. When sanding with a thick disc, you can direct the sparks slightly to the side, but when cutting to the front? It is asking for an accident , it is impossible to hold the grinder with a slight jam and it will go to the human. Motivation for sparks to enter the rotor? What is more important, health or a grinder for PLN 100-200. From the DIY practice: none of the three used ones fell from sparks getting on the rotor.

BANANvanDYK · Answer

Exactly, that's why I was wondering about the authority of the person writing these articles. Could it be new EU standards?
Maybe there will be a person supporting this direction of the sparks projection? I rarely do with a square, but practically in every case I have to put a glove on my right hand (although theoretically it is forbidden to use tools with rotating elements) and I move away from the sparks path so as not to burn my clothes, which is not very comfortable and probably not a very reliable way of holding tools.

heniek07 wrote:
From the practice of a handyman: none of the three worn ones fell from sparks penetrating the rotor.

However, I saw a few copies of power tools in which the rotor or stator had worn winding insulation, and even copper wires half-sawn, but this resulted from working in a very dusty environment. This is beyond your control.

saskia · Answer

I will add a case that I saw at one of the construction sites.
The guy was cutting the pipe in the corner of the room and earlier he moved the angle piece to cut backwards (the sparks were thrown forward) and ... the shield blocked him, pushing the whole machine onto one of his knees. The effect was that the shield acted like a wheel in a car and hit the knee, cutting it 4 cm deep up to the middle of the thigh.
The guy landed for 6 months. in the hospital and 2 years on crutches.

Konrad_M · Answer

When I see that someone has a grinder set in such a way that sparks are thrown forward, anger takes me. In my opinion, it is impossible to cut or grind like that. First of all, it is impossible to hold the grinder while squeezing the disc, and secondly, the sparks thrown forward go straight into the eyes, and thirdly, when the disc is pressed harder against the material, the grinder runs straight onto the legs or stomach.
My position is always so that the sparks fly backwards and this is the safest in my opinion.

manta · Answer

Fairy tales and idiocy ... Unfortunately. This is the best way to hurt yourself, especially when changing cutting resistance or wheel lock. Cost of work clothes may be the least of the problems in a critical situation. At the beginning you can see that the writer has not received basic training in the use of grinders, the basic rule is that we do not stay in front of the disc. In the event of a tear or jam, we are next to the possible trajectory of the pieces of the shield.

adamos4 · Answer

I have been cutting like this for x years and nothing happened to me because when I squeeze the dial, it rests on the material as shown in the drawing. As I lent it to the foreman for 15 minutes. to cut the wall Your way, I was blowing for 2 hours and cleaning the entire center of brick, it must have taken her some life.

saskia · Answer

Dude, the correct cut is just one detail, the machine itself has to be set up correctly, especially the guard. This forward discharge of sparks will be in the correct positioning of the guard and the engine will not be endangered. The sparks from the cut are simply to fall under the cover, because that is what it is for, and not behind the employee. A cracked shield will also not fly in the employee's stomach.

BANANvanDYK · Answer

Me or the author of those articles? Because in my case, at school, we were forbidden to approach and turn on the grinders in the workshop. I was the only one who had the opportunity to learn how to sharpen a drill and ... I didn't. What if you were holding the grinder left-handed (on the left side of the body) with the sparks directed backwards? Slightly less worn clothing, only less visible cut line, and the direction of the cut only to the front. For left-handed people, it's probably no wonder.

manta · Answer

Article Master ... You asked the question

So roughly it looks like this:
right leg forward, foot parallel to the cutting line, left perpendicular to the right, gentle step to maintain balance, in the end you are somehow part of the cutting system

Right hand on the grinder head holder, left hand on the rear handle. We hold the grinder on the left side of the body, the cutting line outside the body. We control the cutting process by looking in front of the target, remaining outside the line of sparks. Of course, you must also properly set the cover, as mentioned above.

adamos4 · Answer

Not Yes So much for the topic.

henrykS · Answer

It seems that everything is fine, but my three grinders, small and large, have switches so positioned that the correct direction becomes a bit inconvenient.
Yes - you can, but it requires you to turn on the switch permanently with your right hand,
and then translating the (working) grinder "upside down".
I did this test today out of curiosity, and I'm surprised it was leading
manufacturers did not include such an option.

Anonymous · Answer

Well, I will only write that practice has shown how cutting is safer and I do not know people who would cut in this uncomfortable, dangerous and new way proposed by experts. A little more and the chainsaws will start to work the other way so that the chips will fly forward, the same situation, I can not imagine maintaining the machine in the event of a jam or other emergency.

heniek07 · Answer

And I am glad that I will never try this "correct" method. Simply put: I will cut the little one so that, in the event of a jam, it runs forward. For such an angle as in the photos I have a stationary one with a 4 KW motor and a 350-400 mm shield.
Regards.

adamos4 · Answer

Well, it seems that the '' experts '' from Milwaukee should read the electrode because they know about grinders, practice and safety. Makita also h..a knows

Anonymous · Answer

As you can see, cutting is done with the machine held at the side, so you can cut and don't get a spark in the old way, right? I propose to my colleague a widia disc to cut a tree and find a piece of board, this attempt to make my colleague quite clear that the proposed new method of cutting is a dangerous game. It is true that it will be a different target, a different material, but the forces at work will be clearly visible. Maybe a colleague will record a video of such an attempt and how does he deal with the maintenance of the grinder? This is an interesting movie the beginning of cutting according to the new method, but the operator is not standing on the side of the machine, then normal. I do not think he dared to cut more difficult patterns according to the new method. Can a colleague imagine cutting rubber according to the new rules?

tata1 · Answer

Hello

I work with a large grinder (230) in such a way that it throws sparks forward, because it is more comfortable for me due to the weight of the grinder and the dimensions of the material to be cut. On the other hand, the small (125) I work would throw sparks under itself, for the same reasons mentioned above (light grinder, light material). I don't see any inconvenience in these methods, I just use them depending on the size of the grinder.

manta · Answer

The fact that you use the language straight from the beer booth, I will omit. See these photos, apparently people from the Bosch company agree with me. photo no. 2 in the gallery. The only conclusion that comes to my mind is that you are not working with grinders too much, but you are trying to speak up. If you were working with this equipment, you would know that the cut is on a designated line, the method you suggest as correct, making it impossible to follow the cut path. The video shows how at the end of the cut, the change in cutting resistance causes an imbalance of the operator. It is not very safe.

witoj · Answer

And it didn't occur to you, gentlemen, that all these films and photos are ADVERTISING?
After all, they will not show how the grinder bounces towards the operator or how it hits him, and you can see in the movies how he attaches to the grinder to keep it cutting away from himself.
I greet everyone, locksmith by education and practice since 1983.
I am against such use and demonstration of this method.

saskia · Answer

As I noticed, some people confuse the very direction of the sparks projection with the direction of rotation of the disc.
In the photos shown in the link 2 posts above, the grinder works overly (correctly), and the correct positioning of the guard in relation to the operator and the grinder's motor may result in a projection of sparks forward or backward, without changing the direction of rotation, but only changing the point of application to the material on the circumference of the shield.

Konrad_M · Answer

Yes, but when you turn the cover 180 degrees, you hold the device (upside down) while cutting and it is as if the shield is rotating the other way.

saskia · Answer

This is correct, but the rotation, or rather the work of the disc, must be overhang, which means the direction towards the operator, not the grinder itself.

Oprysk Stonki · Answer

There is a lot to think about here, with the right hand is holding the back of the machine, the left hand is the handle, the cover is to be on the right side and we observe the effect of the work in the gap between the head and the material being processed. Sparks fly forward. On the other hand, changing the direction of the disc rotation is dangerous, because there is a chance of the disc mounting nut unscrewing by itself.

saskia · Answer

It is not possible to change the right-left rotation in angle grinders. But when you shift the side-auxiliary handle, the revolutions will be in the opposite direction to the operator, more precisely, overdrive. Correctly, the left hand is on the handle with the switch and the right hand on the side handle, especially when cutting. This is how angle grinders are designed and their direction of rotation, and if you are left-handed, then nothing bothers you either. You should never be suggested to set up the grinder or guard or the side handle beforehand, because someone previously might have used it for something other than cutting and moved the guard or side handle.

Oprysk Stonki · Answer

When grinding it is as you write, when cutting as I wrote.

ociz · Answer

Here you can definitely see an expert on health and safety. Too long, loose sleeves and an unbuttoned shirt. As a locksmith by training, I also do not support this method. I wonder if anyone would dare to stand on the steep roof.

BANANvanDYK · Answer

I wanted to write it too, because the loose clothes caught my eye too. Here, health and safety orders the roofer to wear a harness and fasten himself with a rope. A few years ago there was an accident in the city and an 18-year-old died, since then people have reported when they see a man without a rope on the roof. I would like to add that there are large grinders in which you can turn the part of the body with the switch, so they can be reworked to make the disc rotate according to the new method.

Oprysk Stonki · Answer

And if there is no rotatable asshole, how is the handle shaped?

[BHP] Angle Grinder Usage: Directing Sparks Away for Safety and Better Visibility

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