Working with cut-off machines is associated with high cutting speed and requires compliance with safety regulations. Read the manufacturer’s precautions before beginning work.
- Minors, people under the influence of alcohol are not allowed to work with cutting devices. No children, animals are allowed near the place of work.
- Do not perform cutting work in the vicinity of inflammable materials.
- Use cutting wheels only for their intended purpose.
- Inspect the disc before beginning work, do not use tools that are showing signs of damage (cracks, chipping).
- Do not use expired grinding wheels.
- Follow proper storage rules for power tools.
- Wear personal protective equipment when working with power tools.
Read also: Making a machine for sharpening drills with your own hands
- Before you start cutting, mount the wheel securely in the power tool.
- Use tools with protective guards capable of withstanding a blow if the disk breaks and catching splinters.
- When cutting metal, attach the metal structure to one side only, this will help prevent unnecessary heating and deformation of the material and, consequently, jamming of the abrasive disk.
- Hold the wheel straight when cutting, applying only radial pressure.
- If you experience heavy sparking, stop sawing for 10 to 15 seconds and continue at slower cutting speeds after that time.
Installing a cutting wheel in an angle grinder:
- Disconnect the power tool from the mains.
- Secure the spindle with the ratchet locking button.
- Insert the disk in its seat.
- Tighten the retaining nut, secure with a wrench.
- Before starting work, check that the disc is in good condition for one minute.
Wheels to 125 angle grinder
Hi all! Today I’m going to discuss a question that worries a lot of people, and which is stated in the title.
Some sawmill users sometimes wonder if they can put a wheel with a different diameter on their head. Usually they want to pull such a procedure, if there are no suitable sizes at hand, but others are. It also happens that there is not enough reach to cut a certain workpiece, so you want to set a larger size. After all, the seating place is the same for all. Well, let me try to explain what and how.
angle grinder. more than 350 varieties. There is a lot to choose from. Click to see
First, a bit of theory. In order for the disk to cut well, its edge must move at a certain speed as it rotates. If it is slower than necessary, it will not cut well. In addition, the wheels are designed for specific revolutions, beyond which working with them will be dangerous, as there will be excessive vibration, which sometimes even tears them.
So machines with different diameters will not have the same rpm. And there, where the size is smaller, the spindle will rotate faster. The truth here it is necessary to tell that at units on 115 and 125 mm speed is identical. both there, and there happens 10000 or 11000 revolutions per minute. At machines on 150 and 180 is rotation also identical. 8500 rpm. On 230’s. 6000-6600.
So, in order to have a normal cut, you can interchange cutting elements between the 115 and 125, as well as the 150 and 180. You can only use your own wheels on the 230s. However, to put, for example, a circle for 125 on a machine under 115 will not allow the protective cover. it will stand up, but the clearance will be too small. Protection can be removed, of course, but it would be completely against the rules of safety engineering, as work without the hood can lead to injuries, including serious ones, if the disk during work jams or it bends, and as a result, it breaks, its parts will fly to the working. That’s why don’t do it that way in any case.
Let’s summarize. 115 and 150 grinding discs can be mounted on 125 and 180 mm diameter angle grinders, respectively. it is both safe and cutting will be assured. On the angle grinder 115 and 150 mm can theoretically set 125th and 180th, respectively, but only by removing the hood, which is very dangerous, because the worker is left without protection. If you do not care about your health, you can do it, you will get a good cut. Only 230 mm discs are used on 230 mm machines, which in turn can only be used on 230 mm machines.
So, most often the angle grinder is used for cutting ceramic tiles, performing tasks on metal and wood. Read more about this onwards. Use ONLY special fine-toothed wood saw for angle grinder. If you can, it is better to replace the angle grinder altogether with another tool, such as an electric jigsaw.
It is easy to guess that 115-125 mm discs are designed for low-power angle grinders, 150-180 mm. medium and 230 mm. high (over 1500 watts). It is worth noting that there are also circles with a larger diameter, but they are usually used in industrial plants, as part of stationary machines.
- Cutting-off wheels. They are designed for making cuts, rough cuts, etc
- Saw blades. Cutting edge has teeth
- Roughing (grinding wheels)
- Petal discs
- For cutting joints
Safety angle grinders
For many craftsmen it will probably come as a surprise that in the sad statistics of accidents while working with power tools, the first place is firmly held by the “angle grinder”. And the reason is not in the increased danger of the tool. the cause of most accidents is the failure to comply with safety regulations.
To avoid accidents, you should firmly adhere to the rules of work with the angle grinder and pay attention to a number of options:
ensures gradual increase in rpm when you turn on the angle grinder, reducing the load on the motor. It not only extends the life of the tool, but also increases safety. a angle grinder with soft start will not jerk and break free when you switch it on.
reduces stress on the motor when the sander head jams. This option can prevent motor breakage and avoids excessive jerking during jamming. overload protection can be realized in various ways: mechanically, by means of a clutch or other design; and electrically, by controlling the current consumption.
speeds up the stopping of the disc after the tool has been switched off, which increases the safety of the tool. Some professional models have a disc release clutch and disc brake that stops the disc immediately after you switch off the angle grinder.
Grinding discs are used for polishing concrete, metal and wood surfaces for painting or priming. The grinding wheels can be made from sandpaper, felt or even felt. In turn, sanding discs can be manufactured as lamellar or flat (worn on the disc).
Each grinding wheel has its own grit size. It is selected according to the work to be performed. Below is a table for selecting the grit size of the grinding wheels depending on the type of grinding:
Drillpro Upgrade 11.5 Inch Chainsaw 100 125 150 Angle Grinder Into Chain Saw/Цепная пила из болгарки
|Grinding types||Recommended grit number|
|Round Roughing||24. 36|
|Finishing round||60. 100|
|Finishing of multi-blade tools||170. 220|
|Thread grinding||100. 280|
Cutting discs for angle grinders for wood
The angle grinder combined with a wood cutting disc must be suitable for use in all circumstances. Work must be carried out in special protective clothing, and the workpiece to be sawed must be firmly fixed in a vise or clamp. It is important to hold the tool with both hands to eliminate the possibility of knocking it out of your hands. Preference should be given to the angle grinder, which has a speed regulator.
Manufacturers produce discs for wood grinders of four main types, about which we will learn in detail:
Circular or toothed grinders were the first to appear, but they were not very popular due to their kickback effect.The disc has an external (face) arrangement of the large teeth. Manufacturers produce wood cutting discs on angle grinder with a maximum diameter of up to 180 mm. The teeth can be equipped with special tips of carbide materials. Such circles, although the most common, but it is the most dangerous attachment in action. If possible, refuse to use it. It should be noted that you can use such discs on the angle grinder only if the tool is used as a stationary circular saw
Now it is not difficult to choose wood saw blades for an angle grinder, knowing what types they are. For household chores, it is recommended to use a wood saw blade universal or with a tungsten carbide edge. They are not only considered to be effective, but also safe. Saw chain wheels are more expensive, but they are also safe when cutting wood with an angle grinder. Tine wheels are the most dangerous. They are recommended only in situations where an angle grinder is turned into a stationary circular saw.
Cutting discs for angle grinder in turn have their own subspecies, such as:
The purpose of each type of wheel usually corresponds to its name.
Among the grinding discs, there are four main subtypes. petal, wire, diamond and bakelite-based grinding discs (straight, profile T41 and dished, profile T27).
- The flap disc is made of sandpaper. Its main purpose is to remove existing coatings, such as old paint, primer or a layer of paint coat. Also, the discs of this type are used for sanding wooden products.
- Wire discs are used by craftsmen to remove rust. They can also be used for removing other types of stubborn dirt.
- Diamond discs are used for polishing stone.
- Disc-shaped discs are made of plastic or rubber and are used for polishing metal surfaces.
Please note: most discs are treated with a special paste or grease that contains the finest abrasives. They are mainly used for grinding surfaces, such as auto bodywork.
The cutting material is reinforced with vulcanite (consisting of sulfur-rubber) or bakelite (containing phenol-formaldehyde resin). Vulcanite is more elastic, but the speed of the tool is limited to 50-80 m/s.
Bakelite loses strength at 200 °C, heating over 300 °C causes burnout (hence sparking). Nevertheless, due to its higher speed, bakelite is more often used in circles designed for cutting metal. The use of this binder is indicated by the marking BU or BF.