Selection and replacement of discs for an angle grinder What are the types of discs for an angle grinder, their typical sizes. How to change the attachment to an angle grinder correctly. What to do if the disc is stuck and the nut won’t loosen?
How to properly change a disc to an angle grinder
Since the wheels for an angle grinder are consumables, sooner or later they have to be changed. They are attached to the spindle of the angle grinder using a clamping flange (nut) with an M14 thread. To unscrew it, a special open-end wrench with pins on one side must be included with the angle grinder.
So, to replace your tool with an angle grinder, follow these steps.
- De-energize the device by pulling out the plug from the socket.
- Lock the spindle of the angle grinder using the button located on the front of the housing. When the button is pressed, the stopper enters the hole of the disk installed in the gearbox, which fixes the spindle in a fixed position.
- Insert the pins of the key into the holes in the hold-down flange.
- While holding the latch with one hand, turn the wrench to the left (counterclockwise) with the other hand until the nut comes loose. Then it can be unscrewed without a key and removed from the shaft.
In this case, the spindle of the angle grinder rotates clockwise. But in which direction to unscrew the nut if your apparatus rotates the shaft counterclockwise? Remember: the clamping flange should always be unscrewed in the direction opposite to the rotation of the shaft.
- Now you can change the tool after removing the old one.
If you notice that dirt has accumulated inside the casing, then you should remove the bottom flange and use a steel brush to remove dirt from all surfaces.
- Screw the flange onto the shaft by hand. Tighten the nut until you can no longer turn it without a key. After that, holding the stopper, tighten this nut with a wrench, but no more than a quarter of a turn, otherwise the disc will begin to deform.
After performing the above steps, the tool change is considered complete.
With a gas wrench
This method is considered not entirely safe, since the stopper can be broken, although in most cases, it is possible to unscrew the nut. To avoid breaking the spindle lock, do not apply too much force to the gas wrench. The retainer is designed to withstand the force of a standard wrench.
An overly tightened flange can be unscrewed using 2 gas wrenches. To do this, break off the protruding ends of the abrasive wheel with pliers so that you can get the first gas wrench to the bottom flange. Next, tighten both flanges with wrenches and turn them in opposite directions (taking into account which thread on the spindle is right or left).
Unscrewing methods if the disc is jammed
What to do if the pressure flange is stuck? This nuisance, when the nut is bitten, often occurs if, while working with thick and durable materials, the tool is jammed in the workpiece. In this case, the abrasive wheel often breaks, and the spindle continuing to rotate tightly tightens the pressure flange. There are several ways to spin an angle grinder if the disc is jammed.
The main question: How to choose the right disc for your angle grinder?
When choosing accessories for an angle grinder, first of all, you should decide on the type of proposed work. The choice of the type of disc will depend on this. We also want to mention that when choosing a consumable, be sure to take into account the power characteristics of each specific model. Examine the labeling. Often, it is printed on the disc itself and includes a set of symbols by which you can determine the relevance of this consumable to perform the intended work.
Also, focus your attention on such a parameter as the diameter of the disc. In no case should it exceed the size of the protective cover on the particular tool model. 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 discs are 6.00 mm thick. This parameter depends on the total diameter of the disc. The relationship is as follows: the larger the disk diameter, the greater its thickness and vice versa.
What to do if the disc is jammed (bitten) on the angle grinder?
Anyone who has experience of intensive work with an angle grinder has probably faced such a situation at least once.
This usually happens if the disc is pinching between parts, it stops or breaks, and the angle grinder motor continues to rotate and thus permanently tightens the nut.
So what can you do if you bite a disc on 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.
DIY wall chaser from an angle grinder
A groove is a groove that needs to be cut in a wall to lay an electrical wire or cable. The difficulty of this work lies in the fact that the groove must be of constant width and depth. Then the wire will fit evenly and less mortar will be required for laying.
A wall chaser is rarely used in practice, so it will be expensive to buy it for a home. But it can be made on the basis of our beloved angle grinder.
The main task is to install two diamond discs on the shaft of an angle grinder with a distance of at least 1 cm:
- Install the first disk and fix it with a nut;
- Install the second disk and fix it with a nut;
- Measure the resulting distance between the disks;
- We install protection on an angle grinder;
- Checking the work.
But, if for some reason it is not possible to install two discs on the shaft, the strobe can also be cut with the usual method with one installed disc. You just have to cut the second parallel line.
Work with a wall chaser is carried out indoors. This creates a huge amount of dust. Even a respirator does not save from it. To eliminate this negative phenomenon, it is necessary to make a protective casing that would cover both disks and have a branch pipe on top for connecting to a vacuum cleaner. A similar device is on electric jigsaws for collecting small sawdust.
Sometimes, lovers of the rational use of the tool adapt 2 or 4 rotating rollers to this casing. When the chaser moves along the wall surface, it will move on rollers without creating additional loads on the hands.
To make a tool for a wide groove, it is necessary to make special bushings for attaching discs to the desired width. With such a chaser, you can make grooves for pipe laying.
But the protective casing will need to be made wider. On the cover of the chaser for both wires and pipes, you must install a screw for adjusting the immersion of the cutting tool into the wall. In this case, the casing will consist of two parts connected by a hinge and a diving adjustment unit.
What accessories for an angle grinder can be made by hand
The well-known angle grinder, with its cutting, grinding and cleaning capabilities, proved to be capable of several more functions. Expanding the functionality requires you to do some work with your own hands in order to get the devices you need for work.
- Circular Saw from Angle Grinder
- How to repair an angle grinder
- Do-it-yourself grinder
- DIY drill stand: drawings
Angle grinder stand
This device is a small machine with which you can easily, safely and very accurately cut metal pipes, profiles or rods. It consists of a base or a small table attached to the ground or to a locksmith’s table.
The machine is assembled in a simple sequence:
- We install a hinge on the base;
- We weld the supporting pipe to the hinge;
- We attach a U-shaped plate for attaching an angle grinder to the pipe;
- We put on a rubber handle on the supporting pipe;
- Install the disk and check its position.
As a result of simple work, we got a machine or stand for an angle grinder. The angle grinder can now swivel up and down on the part set for cutting. To lift the angle grinder up without loads, we install a spring on the pipe.
Two fixing corners must be installed on the table. At the base of one corner, we make a groove for the bolt around the circumference. It will be needed when a pipe or profile needs to be cut at a certain angle. Then we set this corner with a slot at the same angle to the plane of the cutting disc of the angle grinder.
Parallel to the corner with the arc slot, we install a corner that can be moved to the part to fix it on the table. The pipe or profile will simply be nested between the two corners. This is sufficient for a fast and precise cut.
By installing the supporting transverse metal bar on the machine table, you can clean the material using a steel brush mounted on the angle grinder shaft.