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In which direction should the disc of the grinder rotate and in general, who cuts how?

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I have a small DWT grinder, in the standard version the disc is on the right, rotates counterclockwise, sparks fly forward. But it’s absolutely inconvenient for me to work like that, since I don’t see a product or a circle.

I turned the gearbox over so that the disk was visible, but sparks fly at me - it's not nice. The question is, is it possible to somehow make the disk rotate clockwise? Change wires from brushes? And another question is how safe it is. In principle, the disks are light, they will not cause serious injuries, except that they will knock out the eyes, if without glasses.
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22 commentary
+5
Reply To quote A complaint
I have experienced the answer to this question in my own skin. I cut the profile 20 * 40. The pipe was securely fixed to the workbench with clamps. The direction of rotation was sparks "away". He moved the grinder "from himself." The grinder was 115 mm and the disc was quite sharpened. Disk protection was in place. I don’t remember what exactly distracted my attention and I literally turned my eyes away for a split second ... My hand trembled at that moment, the disk bit, the instrument flew right at me and the disk cut my stomach ... Several factors saved me.
1. Worn disc (small diameter).
2. Excess weight (thick layer of fat).
3. It was autumn and I was wearing a thick jacket.
The disc has torn the skin and damaged the layer of fat. The abdominal wall was only slightly exposed, but not damaged. The seams from the belly were removed after a couple of weeks.
Therefore, I now know for sure that the sparks must fly "toward themselves", the tool must be moved in the direction opposite to the direction of motion of the sparks and it is advisable to try to stand not in the plane of the disk.
And now I try to cut pipes and profiles with a saber hacksaw. I use the grinder only in hard-to-reach places.
PySy. The funny thing is that I worked for 10 years as an engineer in OT and safety at a machine-building plant. Now three years of retirement.
0
Reply To quote A complaint
It is simply unrated. This is-fuck it!
+3
Reply To quote A complaint
there was one case of separation of the circle from a metal washer, when I, on the advice of a "connoisseur," began to install the disks with this washer to the gearbox.

These two phenomena are not connected ... IT DIDN’T come off BECAUSE they put the washer on the gearbox ... Well, think for yourself, what's the difference if all the same it is clamped on both sides with metal circles of the same diameter ???
Also always put a metal washer to the gearbox, so as not to use the key. So the circle will never snap! The explanation is simple and logical - metal on metal slides much easier than metal on abrasive!))) And therefore, when we remove the circle, unscrewing it ourselves, it easily slides on the spindle support washer, but pulls the nut (under it abrasive, not metal!). So it turns out that the nut is easily unscrewed!
When I unpack a new grinder, I immediately hang the key on the carnation - it is not needed !!! (There already hangs a lot. I have only eight working grinders now. And in twenty years .... and not count)))))))). There has never been a case that I did not unscrew by hand !!! I take the key with me only when I work with metal circles (stone, wood). Here they are sometimes very strongly clamped, and there is no difference in the forces of friction - metal on both sides.
My opinion is, in which direction the disk rotates, it doesn’t matter, as they say, "whoever wants it and d ..... t."))) It’s important how to work, not to stand on the cutting line, to hold the grinder firmly, not to overload, not to to force, not to work according to the principle of “cutting quickly”, and even more so not to work “under the degree”.

I completely agree with this !!!! And also what was voiced above - a cut back to sparks ...
By the way, I never thought why manufacturers position this tool precisely as a grinding machine and not as a detachable ... ???

And what is there to think about ??? This is already known to all. When the company “Sparky” came up with this high-speed machine with an angular gearbox, there were still no technologies to produce reinforced abrasive wheels from electrocorundum that could withstand such loads !! And therefore, initially they were equipped only with thick "stones" and were used exclusively for grinding. Later, such technologies appeared and this tool began to be used more for cutting than for grinding ... But the name remained ...
After all, when the company "Dremel" came up with its own machine, it also began to be called the "engraver". And it’s called like that now !!! Although, can anyone argue that an engraver cannot be peeled, cut, or sanded ???? Does everyone use engravers only for engraving? )))
(By the way, I see more and more what engravers call "Dremel" in Russia, even if they are made by other companies ...)))
Apparently, it "stuck" for the time when "Dremel had the exclusive right to release his invention for some years .. (Like Xerox, for example). Then everyone could do it ... but still they call it" Dremel " and Xeroxes ...
(By the way, everything in Belarus is also called Xerox, but engravers didn’t doze off))) These are engravers!))) For some reason, it didn’t “grow” ...)
"Bulgarian" by the way - from the same opera))). Only "Sparky" supplied this instrument to the USSR ... And only "Huskvarna" - "Swedish" chainsaws)))))
+1
Reply To quote A complaint
Gentlemen forum users, let me insert my 5 kopecks.))) As a person who also has some experience as a grinder, I can say, I cut sparks from myself. Over the years of working as a grinder, there has been one case of separation of a circle from a metal washer, when I, on the advice of a "connoisseur", began to install disks with this washer to the gearbox. Once I received a significant blow to my hands when a disk ran out of thick metal and when replacing it by stupidity I did not check the marking and set the disk thicker than the previous one. When working in inconvenient places, the disk jammed repeatedly but there was not a single gap, only pieces were pulled out. My opinion is, in which direction the disk rotates, it doesn’t matter, as they say, "whoever wants it and d ..... t."))) It’s important how to work, not to stand on the cutting line, to hold the grinder firmly, not to overload, not to to force, not to work according to the principle of “cutting quickly”, and even more so not to work “under the degree”. By the way, I never thought why manufacturers position this tool precisely as a grinding machine and not as a detachable ... ???
+2
Reply To quote A complaint
Even better: “A rocket always flies from a torch,” that is, regardless of where the sparks fly, the cut point should be removed from them.
+1
Reply To quote A complaint
He came up with another way: "If sparks fly to you, you need to move the source of sparks away from you." )))
Author 0
Reply To quote A complaint
We sorted this out, but what about security? In the face I definitely won’t get disc scraps, shavings, etc.
Author 0
Reply To quote A complaint
And you estimate that in front of you is a sheet of metal, only you cut it on the other side of you, in short, not forward, but backward. then it will turn out as Ivan said.

PS ... Although not, it will not work
0
Reply To quote A complaint
Well, yes, of course, the opposite. While thinking about how to better express a thought, I lost it. )))
+4
Reply To quote A complaint
If the sparks fly toward you, then the angle grinder must also be moved toward you.

Not mistaken ???
In my opinion, exactly the opposite !!!!
Sparks on yourself - angle grinder from yourself !!! And vice versa!!!
Otherwise, just "against the blade of the knife" will scrape!
+1
Reply To quote A complaint
Quote: Valery
the circle “sharpenes” the place of the cut, creating a very sharp wedge from below, and very dull from above.

Here it is, quintessence! The rest is less significant details. The disc must not move against a sharp wedge. Then the disk will scratch the iron, and not vice versa. I would formulate this rule: "In which direction the sparks fly, the cut point must be moved there." If the sparks fly toward you, then the angle grinder must also be moved toward you.
Author 0
Reply To quote A complaint
Well, I'll try, now I'm sorry to spoil the disks. Only it is unlikely that something will tear. Rather, there will be faster disk wear.
+1
Reply To quote A complaint
Bulgarian rotates the disk at a speed of 11000-15000


Of course, it does not apply to the case, and does not change anything, but I will correct it: 10000-12000, for that matter ....

, do you really think that at this speed your notch will go into sheet metal and thereby rupture the disk?))

Try to do the same, just bring the rotating “away from you” circle in the same way to the workpiece ...
Yes ... And shoot it on the video ...)))) You can immediately call it "Cutting Wheel Break"))))
But this applies to thin metal, when cutting thick piece of iron your statement is even more doubtful.

I drew on video ... Even in thick metal the circle “sharpenes” the place of the cut, creating a very sharp wedge from below, and very dull from above. This lower “knife” breaks your work element as soon as you lower the grinder a little lower. (Of course, I'm talking about the option where the circle “scratches against the blade” and not “slides off” like in my video.)
The circle of a circular saw with hefty "notches" in general, because it does not break. But because a clove cannot “bite” metal at such a speed, the disc cuts with the tips of the teeth.

Not because ... But because it is metal and the tree is soft. Try to remove the support platform from the manual circular (with the rotation "away from you", as they usually have) and bring it to the edge of the board. I assure you, you will get such a jerk that she just jumps !!! At the same time, she will not jump forward, namely up and back! And the angle grinder has no supporting table !!! And the workpiece is MUCH AFTER the working element !!! That is why not the workpiece (as in the case of a tree and a saw) is destroyed, but the working element itself !!!
An example is a lawn mower. A piece of piece of iron revolves there, not even a disk! But during rotation, this piece of iron turns into a kind of "disk".

An example confirms, rather, what I said! ))) Imagine that the grass is stronger than a knife !!! And at the same time, there is enough motor power with a margin to tear this knife ... Do you think it will tear, or not? )))))
Author 0
Reply To quote A complaint
Valery, a circle with a notch does not fly apart, not because it rotates in any direction, but because of the speed of rotation. The Bulgarian turns the disk at a speed of 11000-15000 rpm, do you really think that at this speed your notch will go into sheet metal and thereby rupture the disk?))

But this applies to thin metal, when cutting thick piece of iron your statement is even more doubtful. The circle of a circular saw with hefty "notches" in general, because it does not break. But because a clove cannot “bite” metal at such a speed, the disc cuts with the tips of the teeth.
It's like in that joke - "More gas - fewer holes"

An example is a lawn mower. A piece of piece of iron revolves there, not even a disk! But during rotation, this piece of iron turns into a kind of "disk".
+2
Reply To quote A complaint
Here. This I filmed specifically for "unbelievers" ... After I saw how a fool, cutting "against the wool," scattered a circle !!!
0
Reply To quote A complaint
Once again I repeat: CIRCLES DO NOT BREAK, if cut correctly !!!
Believe my experience ... I cut not one THOUSAND !!! (Not a hundred, but a thousand). Only one scattered !!! And then, I was waiting for this. Because, before that, he stepped on a lying grinder and heard a crunch of a circle. Then it was too lazy to shoot ... I decided - I will try. If it crashes, then I’ll already replace it! Scattered ...
A couple of times it was that a circle bitten by a tense blank was torn off the “hub” - only the circle edged with metal remained on the grinder, which was placed under the nut, and the circle with a large hole inside flew away ...
CORNER CANNOT BE CUT IN ONE Sunset !!! First one shelf, then another. You can do this without turning off the grinders, but simply "rolling" it at the right angle !!!
I’ll repeat once again: when sparks (or pieces of a disk) fly down and to the side (past the right foot, or the right side), they can’t ricochet in the eyes !!!
Unless from the floor - to the wall, from it to the ceiling, from it to the front wall, and from it to the eyes! )))))))))
But, flying forward just ricochets right in the eye!
Author -2
Reply To quote A complaint
They fly down if you cut sheet metal at the end, as an example. And if you need to cut something lying on a plane? For example, a piece of corner or reinforcement on a board. Everything flies horizontally on you, on clothes and in the face often. How and why I do not know, but it flies.
In the event of a circle breaking, the broken pieces of the circle from the floor, table, product immediately fly into the mug. If there are no glasses, there is no gas. And circles are often torn, it's only you they are magical and eternal))
Author 0
Reply To quote A complaint
... You can cut it as you like ... The only (AND MOST IMPORTANT) rule - the direction of movement of the tool should be against the direction of rotation of the circle !!!


But what's the point? The circle has no direction of rotation. I work in all directions, in any poses, it all depends on the tasks. The disk only tears when skewed, hit, over-pressed, and so on.

I even saw broken circles ... But a circle cannot be broken at all if the material is not previously stressed ...

Are you really?))
+3
Reply To quote A complaint
In principle, the disks are light, they will not cause serious injuries, except that they will knock out the eyes, if without glasses.

How does it get in your eyes ??? Only if it is reflected from something ... Only by rebounding ... That is why it’s safer to “do it yourself” .. Of course, if you don’t lower the circle below the plane ...
Yes, and I repeat: A disk is torn only in two cases:
1. Cut to the end of the strained workpiece from the side of tension (It happens that otherwise you can’t crawl, and then you have to act like that consciously).
2. The operator of the angle grinder is a blunt ram cutting “against wool”. smiles (There are some. I saw it myself)

When working with one hand, sometimes (very rarely) it happens that you can’t hold and lower the cutting disc and jag it ... Then I take some unnecessary piece of corner, or strip (with a relatively “sharp” edge) and, holding it in the left , and in the right grinder, I align the circle about it and use it further ...
Of course, all this refers to the so-called. "small angle grinders" - 115 and 125.
+3
Reply To quote A complaint
but sparks fly at me - not nice.

And what's unpleasant ?? After all, they are not flying at you, but down you! ... But the train of sparks forward is really unpleasant ... There may be a wall (if on a workbench in a vice, for example), there may be a part of the workpiece sticking up. .. But you never know what a sheaf of sparks can "rest on" and be reflected in your face !!! After all, reflected sparks are more likely to get into the eyes than "direct" ...
+4
Reply To quote A complaint
as standard, the disc is on the right, rotates counterclockwise,


.. I’ll start with the fact that “clockwise” or counterclockwise is not entirely correct ... It is not clear where the “dial” is and where is the observer ... (For the same reason, the bullet in the barrel of the machine rotates “left- up-to-right ", and not clockwise ... After all, we can shoot at the clock, or we can shoot at the person looking at the clock))))) Therefore, it is correct -" to yourself, "or" from yourself. " This refers to the movement of a point on the surface of the cutting wheel at the point of contact with the workpiece ... Sparks fly in the same direction ...

I do not quite understand what it means "in a standard version" .... In the gear case there are three (sometimes two) threaded holes for fixing the handle. Protection is always generally just in the box. In the assembled state, not a single Bulgarian is included in the box back)))). Collect as you wish ...
The switch is either "on the back" (if the manufacturer positions his product as, first of all, a ShLMF machine), or on top with the position "on himself" ...
I always set the rotation "for myself", as I often work with one hand ... Nobody holds the grinder in line with the body - its supposed axis (and train of sparks) go past the right side down ...
By the way, about the "standard execution" ... At seminars, Bosch specialists always focus on the fact that it is necessary to set the rotation "on yourself" ...
... You can cut it as you like ... The only (AND MOST IMPORTANT) rule - the direction of movement of the tool should be against the direction of rotation of the circle !!!
Those. if the rotation is "on yourself" - we start cutting from ourselves and push the grinder forward!
If the rotation is "on your own" - start cutting from the far edge and pull the tool towards you.
THIS POSTULATE !!!
I saw firsthand morons who don’t observe it ... I even saw broken circles ... But the circle cannot break at all if the material is not previously stressed ... But the fools manage ...))))
+2
Reply To quote A complaint
they won’t cause serious injuries unless they knock out their eyes,
Uh, five! )))

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