Angle Grinder Spins Back
A real man must be the master of the house!
Which direction should the angle grinder turn?
Direction of rotation of the disc angle grinder
I have been repairing power tools for eight years already, during this time I heard so many terrible first-hand stories from the owners that God forbid. Including about pieces of a disk in a neck. The last example: a man does not take his tool out of repair for a long time, for several months, when I call him on the phone, I don’t understand what he says. Finally it appears: there is no voice, there is a terrible scar on the neck.
How to operate the angle grinder correctly and safely and what is needed for this?
An angle grinder worked without protection, then everything is clear. It saved that he worked in the immediate vicinity of the regional hospital, did not have time to bleed, everything was sewn up, but he damaged the ligaments forever.
The disc is placed the way someone whose hands are sharpened. The disk on the left and, accordingly, the rotation on itself is a consequence of the fact that when working instinctively they put their right hand forward, holding the gear knob to it. The same thing when working with a shovel. Whoever holds a shovel, that is how an angle grinder works. Although the effort of will, you can force yourself to change your hand. Because I work forward with my left hand (the disk is on the right, rotation is from myself), then, of course, I consider this option to be the only correct one: rolleyes :. Pros:
1. Sparks fly away without causing any harm to me or the angle grinder. When they work with sparks on themselves, they are sucked in by the fan inside the engine and over time all the windings begin to redden with pure uninsulated copper, as if someone had rubbed it with a special sandpaper.
2. When biting, the angle grinder jumps out of the cut directly into my hands. You just need to always remember that you have a car with several horsepower in your hands and hold these animals with your hard hand. According to the working conditions, of course, you have to turn the angle grinder, unless you pick it up differently, but I always return to the usual version.
When working with an angle grinder I try to avoid deep cuts. It is better to cut the corner in two steps, cut through the shelves in turn. I cut the channel in three steps, first the core and then the shelves. thereby eliminating accidental pinching of the tool. Cutting thick metal sometimes has to be cut, deliberately expanded by cutting in two steps, especially if the cutting area is uncomfortable and an unintentional skew of the disk is possible.
I cut the line of the cut in thick metal immediately and cut it by 5-7 mm, cutting the edges of the cut. when cutting, bag cutting should be avoided; displacement of the stack is fraught with skewing of the lower layers. It is not necessary to cut two elements of spatial structures when the disk cuts simultaneously two spaced apart elements; when the disk is thin, the cuts of the cuts are not parallel (not coaxial).
View. Rotating Disc
A sectional view of a rotating disk is shown in Fig. 4.14. There are 30 slots on the periphery of the disk, in front of which the analyzed samples are fixed in the form of a polymer film with spring clips. The disk rotates inside the casing, consisting of two covers, front and back. Both covers have NaCl windows mounted on the optical axis. When the disk rotates, the samples are sequentially mounted on the optical axis. The exact position of the disc, which is important during spectrum measurement, is provided by a ball retainer. On the rear surface of the rotating disk there are plug-in studs with ball heads that serve to turn on the motor microswitch. If one of the studs is not inserted, the engine turns off and the series of analyzes ends.
Nenny in the form of a rotating disk with sectors, the surfaces of which have external silvering. The chopper 9 rotates at a speed of 4 5 r / s. The presence of two sectors provides a frequency of interruption of the luminous flux of 9 Hz. The entrance slit automatically changes from 0 01 to 3 mm depending on the range of wavelengths of the spectrum. Reflected from the planar mirror 17, the light flux again passes through the prism 16, while the dispersion increases. The exit slit cuts out the monochromatic luminous flux from the spectrum image. When the mirror 17 is rotated, the image of the spectrum on the exit slit 11 moves, which leads to a change in the wavelength or wave number of the monochromatic light flux.
A rotating disk electrode is often used in electrolysis. With the rapid rotation of the disk electrode around an axis passing through its center perpendicular to the plane of the disk, the fluid in contact with the central parts of the disk is discarded by centrifugal force to its edges. At the same time, a vacuum is created near the center of the disk and the liquid stream is directed to the center of the disk.
The knife 16 in the form of a rotating disk is located in the housing 15 and has an independent drive.
The knife 16 in the form of a rotating disk is located in the housing / 5 and has a separate drive.
Spray dispensers are made in the form of rotating discs.
Direction of rotation angle grinder
This filter is made in the form of a rotating disk with a variable thickness.
A modulator in the form of a rotating disk with a narrow gap is used here. When a gap passes near light sources, short photocurrent pulses occur.
Consider the electrode used in the practice of measurements in the form of a rotating disk in an electrolyte solution.
The compared flows are usually modulated using a shutter made in the form of a rotating disk with blades. The axis of the obturator can be offset from the central position corresponding to the middle of the segment connecting the optical axes of the modulated flows, due to which a phase shift can also occur. It is equal to 4ltsTs. 1, where l is the number of shutter blades; c. the offset axis of the shutter from a central position; C is the distance between the axes of the flows.
However, Levich managed to obtain a complete quantitative solution only for the electrode in the form of a rotating disk for the two most simple cases: the case of a binary electrolyte and the case of three types of ions, when the number of ions of the kind of interest to us is very small compared to the number of other ions.
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How to remove, change a jammed disk with an angle grinder?
How to remove a disk from an angle grinder. an angle grinder (hereinafter referred to as angle grinder), popularly referred to as an angle grinder, is probably the most demanded inventory that is present in the arsenal of almost every master regardless of his qualifications.
This tool is actively used in abrasive processing: cutting, grinding, cleaning of workpieces made of stone, metal and many others. It is widely used in areas such as: construction, woodworking and other similar types of work. Like any other tool, an angle grinder is also not divided into several classes.
Видео: Angle Grinder Spins Back
The following are meant: household, semi-professional and professional class tools. This classification is determined by the power resource of the tool, its productivity, the presence of certain additional options, material and build quality, etc.
In addition to various types of cleaning brushes, consumables for angle grinders are cutting wheels and a variety of grinding discs. Types of accessories for angle grinder: how to make the right choice?
Disks for an angle grinder differ among themselves according to the following main signs:
- Outside diameter;
- Disc thickness;
- The material of which the disc itself is made;
- The characteristic of maximum rotation speed;
- And, of course, the area of proposed work.
For the best understanding, let’s look at the main types of disks for an angle grinder and give a definition of their application:
- Cutting wheels. These are the most widely used consumables for angle grinder. Their main purpose is to work with metal, stone and wood. A variety of cutting wheels for an angle grinder are diamond blades. This is a heavy-duty tool for processing materials of increased strength, such as reinforced concrete, tile, porcelain tile, marble.
- Grinding and grinding wheels. As the name implies, this type of disc is used for grinding various materials, for example, polishing products made of stone, or for removing (peeling) the top layer, for example, eliminating a layer of rust or an old paint coating.
Cutting wheel 115 x 1.6 x 22.23 Titanium Abrasive
Cutting wheels for an angle grinder, in turn, have their subspecies, such as:
- Cutting wheels for metal work;
- Abrasive wheels for working with stone;
- Circles for woodwork;
- Diamond blades (mentioned above).
The purpose of each type of drive usually corresponds to its name.
Among the grinding disks, there are four main subtypes. lobed, wire, diamond and grinding disks on a bakelite basis (straight lines, T41 profile and Belleville profile, T27 profile).
Grinding wheel 150 x 6.0 x 22.23 Sprut-A
- The petal disc is made of sandpaper. Its main purpose is to eliminate an existing coating, such as old paint, a primer or a coat of paint. Also, disks of this type are polished wooden products.
- Wire discs are used by craftsmen to remove rust. They can also remove other types of persistent pollution.
- Diamond blades are used for stone polishing.
- Plate discs are made of plastic or rubber and used to polish metal surfaces.
Please note: in the process of work with most discs, a special paste or grease is used, which contains finely ground abrasives.
Which direction should the angle grinder rotate and in general, who is cutting it?
They are mainly used when grinding surfaces, such as, for example, car body parts.
The main question: How to choose the right disk for an angle grinder?
When choosing equipment for angle grinders, first of all, you should decide on the type of proposed work. The choice of the type of disk will depend on this. We also want to mention that when choosing a consumable, be sure to consider the power characteristics of each specific model. Read the labeling. Often, it is applied to the disc itself and includes a set of characters by which you can determine the relevance of this consumable for performing the proposed work.
Also, focus your attention on such a parameter as the diameter of the disk. In no case should it exceed the size of the protective cover on a specific model of the tool. The size range of discs is usually represented by the following diameters: 115, 125, 150, 180 and 230 mm. The most common diameters are 125 mm. and 230 mm. They are optimal for most types of work and the capabilities of the tool itself.
Among the Bakelite-based grinding discs, the most popular are 6.00 mm thick discs. This parameter depends on the total disk diameter. The dependence is as follows: the larger the diameter of the disk, the greater its thickness and vice versa.
How to put the disc on the angle grinder?
To correctly place the disk on the angle grinder, it is first worth noting that the disk is mounted on the spindle of the angle grinder using a special clamping flange with M14 thread. Let’s take a closer look at how to remove a disc from an angle grinder. In order to unscrew the disk from the angle grinder, you first need to dismantle the flange. Especially for such purposes, manufacturers complete the angle grinder with a special open-end wrench. It has a specific shape. The pins located on the horns of this key are inserted into specially provided holes on the flange.
To unscrew the flange, we fix the spindle. To do this, we clamp the latch, which is usually a button on the top of the case. When pressed, the cotter pin is placed in the hole of the driven disk of the gearbox, and this, in turn, prevents its rotation. Next, insert the key pins into the specially provided holes on the flange, pressing the latch must be simultaneously turned counterclockwise and move the flange in place. If the manipulations were successful and the flange succumbed, you can unscrew it by hand and put it aside.
Now dismantle the disk. Often, in the process of intensive work with the tool on the inner side of the protective casing, a certain coating forms from small particles of metal and abrasive material. For optimal, stable and durable operation, an angle grinder, remove the bottom of the flange and clean the casing with a steel brush.
To install a new disk, after cleaning the casing, you must perform the following actions:
- Install the lower flange in its place;
- We put a special gasket on top of it (in case the gaskets are not provided, they can be cut independently. Cardboard or tin will be the optimal material).
- Install the disk;
- We put the second gasket;
- We install the upper flange from above;
- We wrap the upper flange by hand in the opposite direction from the rotation of the circle, an angle grinder, while holding the disc itself;
- Next, again press the lock button and scroll the flange by hand until you feel resistance;
- At the final stage, we finish fixing using the same open-end wrench. To do this, insert the key into the holes and scroll a little more. Remember that you need to tighten it by no more than a quarter of a turn, since in case of excessive fixation of the flange, the disk will become unusable.
- Before starting work, be sure to spin the disk idle for at least 30 seconds.
After all the actions performed, you can safely continue to do the work.
One of the most frequently asked questions about mounting / dismounting the angle grinder equipment is: “Which side should the disc be placed on the angle grinder?”.
Usually, inexperienced masters ask this question. Is it possible to set the circle on the wrong side. yes. Firstly, if the disk is not flat, but, for example, petal, then you will not be able to install it incorrectly, if the petals are not located correctly, simply twist the casing and handle onto the angle grinder. That is, the question disappears by itself.
If the circle is still flat, then you should focus on its label, the so-called “shirt”.
If the angle grinder rotates on itself, the disk should be installed with a “jacket” outward, if the disk is spinning away from itself, then, accordingly, it must be installed with a “shirt” inward.
If you do not adhere to this algorithm, there is a high probability that the disk will very quickly fail or immediately become deformed.
What to do if the angle grinder has jammed (bitten) a disk?
Everyone who has experience working intensively with an angle grinder must have come across such a situation at least once.
Usually, this happens if the disk clamps between the parts, it stops or breaks, and the engine, the angle grinder continues to rotate and thus tightens the nut irrevocably.
So what can you do if you bit a disk onto an angle grinder?
Each master has his own secrets. Especially for you, we learned a few of them and now we will share the most common ways to get out of the situation.
Method number 1 to remove the disk from the angle grinder
First, figure out which direction to unscrew the nut.
The flange must always be folded in the direction in which the disk rotates.
For this kind of work, you will need either two gas keys or two clamps.
Here’s what you need to do: we destroy the remnants of the disk, with one key we fix the washer located behind the disk, with the second we unscrew the flange.
Method number 2 to remove the disk from the angle grinder
This method involves the use of the famous lubricant VD-40.
It is probably like electrical tape, applicable in all cases of life.
You need to sprinkle the flange, wait about 5 minutes and try to unscrew it with a wrench.
Method number 3 to remove the disk from the angle grinder
This method is used in extreme cases.
Method number 4 to remove the disk from the angle grinder
How to exchange a disk for an angle grinder to avoid disassembling the tool and intensive impact on it? To do this, cut the disk as far as possible, dismantle the protective casing of the angle grinder and remove the rest of the circle with a hacksaw.
When carrying out all the above manipulations, do not forget about safety measures.
Take care of yourself and the safety of your instrument.
Make it a rule that the replacement of cutting and grinding wheels with an angle grinder is carried out in working gloves, and the work itself must be carried out with special safety glasses.