Can Jigsaw Cut Metal
There is an opinion that the very concept of “angle grinder” came into our everyday life because this tool was first brought from Bulgaria. This is partly true. But they developed and began to produce it in Germany. He first came to us from Bulgaria, where he began to be released in the seventies. Angle Grinder. The correct tool name.
When working with an angle grinder, it is imperative to observe safety precautions, namely: wear glasses, gloves, a helmet and a protective apron.
It is impossible today to imagine the work of builders, repairmen, mechanics, locksmiths without an angle grinder. With its help, you can cut a variety of materials, including metal: reinforcement, bar, water pipes, corner, profile.
The resulting slices can be ground, polished, sharpened. A large selection of interchangeable nozzles makes this tool indispensable and versatile.
At the same time, it is the most traumatic tool.
For cutting metal, an angle grinder will need:
- Angle Grinder;
How to choose the right angle grinder
The angle grinder should lie comfortably in your hand.
The right choice and quality of the angle grinder itself determines the quality of work and the safety of the worker.
When choosing a machine, you should focus on its main parameters: power and diameter of the cutting abrasive wheel. Its weight is also of no small importance, since it is often necessary to work “on weight”, and its dimensions in order to be able to perform work in inconvenient and inaccessible places.
Most buyers at the sight of powerful grinders are somewhat afraid that dealing with it is more difficult than with low-power ones. This is an erroneous opinion. In low-power grinders, jamming of disks more often occurs, i.E. They cannot physically “pull out” the disc under heavy loads. The situation of how the drive and the machine itself will behave after reducing the load is unpredictable. Most likely the angle grinder will be torn from the hands. The result will be a rupture of the disk, damage to the machine and injury to the cutter. Therefore, it is better for beginners to purchase an angle grinder for a 125 mm disk with a power of 800-1000 W and a spindle speed of 10,000 rpm. Such power is enough for cutting iron.
For metal cutting, there are machines for a 115 mm disk powered by batteries, but, as practice shows, with their high cost in solving everyday problems, they do not justify themselves.
The arms of the angle grinder must be rubber or made of material that will dampen vibrations from the machine.
But no technical characteristics do not reflect the convenience and safety of work. The angle grinder should be comfortable and secure in your hand, so that when working with metal you should focus on it, and not on how to hold the tool in your hands. It is advisable that the handles be rubber or made of vibration damping material with recesses for the fingers.
In low-power grinders, as a rule, there is no additional handle.
If any inconvenience was found when choosing, you should look for an angle grinder of another model.
How to choose the right wheels
There are signs on the circle that will help you choose the right circle.
Choosing drives, you need to know what they will be used for, pay attention to their diameter and thickness. These are the basic drive options.
Smallest diameter. 125 mm, and the maximum, from the public. 250 millimeters. In professional angle grinders, discs can be of larger diameter.
The thickness of the cut part and the maximum depth of the cut depend on the diameter of the disk.
If you plan to cut only metal, you need to purchase a cutting disc. It has the smallest thickness from 1 to 1.2 mm, for industrial grinders. Up to 2.5 mm. This will facilitate the physical load on the angle grinder and on working. The cut is neat.
If you plan to carve thin metal, then it is done with a disk of the smallest diameter or with an old, almost exhausted disk.
Many believe that diamond cutting is necessary for metal cutting. This is a completely wrong opinion. The diamond disk in the metal will simply bog down and will be unsuitable for further work.
Experts say that the angular grinder doesn’t have any particular difficulties when cutting metal, even for beginners.
Basic rules for safe operation when cutting metal angle grinder
The layout of the most dangerous sectors during operation is an angle grinder, taking into account the rebound and destruction of the disk.
The most necessary condition when cutting. Strict observance of the rules of safe work.
Manufacturers of grinders are constantly trying to minimize the risks of injuries and injuries by inventing and improving various protection systems. But no one takes care of the employee like himself.
The main hazards that arise when cutting metal. The departure of fragments of a broken disk, the flow of sparks and the smallest abrasive particles, the inability to hold the tool in hands.
If the disk breaks or sticks, the angle grinder can break out of the hands at the most inopportune moment and with great force, so even before starting work, you should consider the direction of its possible movement.
Safety rules should not be neglected even when performing minor work.
Before you start, you should:
- Protect the face, eyes, hands, and possibly all parts of the body.
- Remove all combustible materials and objects that are in the direction of the sparks.
- Fasten the machined angle grinder to a vice if possible. Do not hold the workpiece with your free hand or press it with your feet.
- If a new disk is installed, you need to “scroll” its angle grinder at maximum speed, placing it further away: the disk may turn out to be defective and scatter into pieces.
- Install, adjust and lock the protective cover.
It is best to protect the face with a special shield when working with an angle grinder.
- When replacing discs during rest, it is necessary to disconnect the angle grinder from the mains.
- To protect eyes and face, use glasses or a protective shield. Professionals use both of them during long work.
- Hold the angle grinder firmly throughout the work.
- To replace the drive, you need to wait until it stops completely.
- Work in protective gloves. Cotton mittens are undesirable, they do not provide sufficient protection, they can ignite, and the threads can be wound around the spindle with an angle grinder or disc.
- During operation, you need to position yourself so that the face, and, if possible, all parts of the body are not in the plane of rotation of the disk.
At the end of the work should:
- Wait until the disk stops turning completely and only after that put the tool on the floor with the disk up, so as not to damage it;
- Disconnect the angle grinder from the network;
- Make sure that there is no smoke or other signs of fire.
A typical mistake made when cutting metal: if the diameter of the new circle is larger than the dimensions of the protective casing, it is removed. Cover. This is a protection in case the disk breaks and breaks into pieces during metal cutting.
Instead of a disk many put mills, saws or other improvised materials. Doing this is strictly prohibited.
How to cut metal angle grinder. Practical tips and tricks
If long pipes lie on supports, you need to cut their hanging edge. If you cut them in the middle, then due to its own weight, the metal will bend and clamp the disk.
If there is no handling skills with an angle grinder, then before starting work, you should learn to cut into unnecessary details.
The cutting wheel accepts only radial forces. Attempting to change the cutting plane when the blade is inside a metal part will break it.
Heel of a disk cuts metal more effectively (the near lower part of a circle).
In order for the angle grinder and discs to serve for a long time, after every 5-7 minutes of work, you need to take a break for 20-30 minutes. This rule is especially important for low-power grinders who are afraid of overheating.
To increase the service life of disks, especially expensive ones, and to cool the metal, the place of the cut must be watered. It is advisable to carry out the work together.
Aluminum. Very viscous metal. When cutting parts of large thickness, kerosene must be dripped into the seam, observing fire safety rules.
For molding, sawing tin, curly carving, used discs should be used. “Bits”, so do not immediately throw them away.
Corner correctly cut not in one go, but separately both shelves.
If the pipes, angles, and fittings are sufficiently long, lie on the supports, correctly cut the hanging edge. If you cut between the supports, the part due to its own weight will bend and jam the disk.
Parts of large thickness are cut only rectilinearly. If you need to cut a curly part, first straight-line cuts are made, then the remaining unnecessary parts are removed.
Do not press on the angle grinder. This will lead to jamming or damage to the disc and overheating of the angle grinder. If cutting is slow, replace the blade.
It is not worth processing the resulting slice on the side of the disc. A different type of disk is used for this.
Molten particles of metal and abrasive, falling on plastic products, glass and car headlights, stick into them, and then it is almost impossible to remove them. Therefore, before starting work, they must be removed or protected.
Is it possible to use an angle grinder for cutting metal and corrugated board?
At that time, when they had just started using metal tiles and corrugated board, the instructions said that it is strictly forbidden to use an angle grinder for cutting these roofing materials. This is explained by the fact that on both sides they are protected by zinc and polymer coatings and painted.
The abrasive disc heats and melts the material. Slices are torn. Flying sparks also disrupt paint. All this causes corrosion of the material and a decrease in service life.
Nevertheless, recently, builders began to use an angle grinder for this work. At the same time, the work is greatly facilitated, it can be carried out directly on the roof. After cutting, the edges must be treated with anticorrosive substances, primed and painted.
Correctly cutting metal with an angle grinder is not a big deal. Everything can be learned. The main thing. Comply with safety rules and follow recommendations.