Which Grinder Is Better To Grind A Car

Criterias of choice

When buying a specific model of grinding equipment, you should consider the tasks that the power tool must perform in the future. The choice of professional or household equipment depends on this.

Professional wood sanders are ideal for long, active and continuous work. They will cost much more than household tools. For use without significant loads and long-term work, it is worth giving preference to simpler grinders. If the choice is between a professional device and an ordinary one, then it is better to purchase the first option, despite its high cost. If the second one was chosen, then when working with it, it is recommended to subject the device to higher loads less. You must pause every 3 hours. Only compliance with simple operating rules will extend the service life of the tool.

If there is a need for grinding or polishing decorative wood products, then it is recommended to purchase eccentric models

Manual cleaning of the premises takes a lot of time and effort.

The length of the cord plays a significant role when choosing a grinder model. Since it is inconvenient to work with the device on a short cord, and an extension cord is not always possible to use.

Battery-powered tools are on sale, which are relevant when working in the country and in houses where electricity has not yet been supplied. The cost of such models is high.

Manually

Sanding wood by hand, of course, requires a lot of labor and physical effort. But this method of grinding is a priori less aggressive and allows you to fully control the process. Even in hard-to-reach places. In corners and on difficult curved bends. You can get a decent quality grinding when choosing a manual method.

With the so-called interlayer sanding of finishing coatings, manual work has no alternatives at all. It only eliminates the risk of damage to the already applied finish. Manual processing (when compared with grinders) allows you to get the smoothest and smoothest surface, although it takes many times more time.

Professional resurfacing

Choosing the services of professional craftsmen, you can not worry about the quality of grinding. Specialists of the company “Master Srubov” use special grinding machines in their work, which allows them to perform work practically without dust and at a high level of quality. Depending on the condition of the floor, we select a tool and sandpaper of the desired grain size.

We carefully carry out every stage of sanding both new and old floors. After the work of our craftsmen, your flooring will be sanded to a perfect smoothness. To contact us, go to the “Contacts” page, where our coordinates are published.

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Grinding: tools and materials

The question of how you can grind a wooden floor from boards should not be confused: the work is not particularly difficult, tools and materials are available.

• Conventional tools are not suitable for this kind of work. You will need a special machine, a grinder, and preferably two: for grinding the main plane and for corner processing. The equipment is expensive, it is impractical to purchase it for one time, it is preferable to rent.
• For solid wood floors planted with glue around the perimeter, the machine is suitable for a drum type. Withstands heavy weight and the coating, which is laid on logs and has a thickness of 2.5. 3 cm. The floating method of laying involves the use of light surface grinders.
• Manual looping of the boards should not be ruled out. A scraper for manual floor sanding must be available.
• Emery paper, different in size, grain (first No. 40, then successively No. 60, No. 80, at the final stage. No. 120) will make the surface smooth. Calculated for 20 m2. One sheet of abrasive material of each size.
• Scissors are required to cut sheets.
• Putty is purchased to eliminate cracks.
• The treated boards are opened with varnish. This process will require a brush and roller.
• The vacuum cleaner will allow you to remove debris before starting work with varnish.
• A mask or respirator will protect against generated wood dust.

What and how can you grind

The purpose of wood polishing is to remove defects as quickly and efficiently as possible without leaving noticeable deep scratches. To do this, you can use special tools. Now their price is not too high.

On the free sale you can find several types of grinders:

• Tape;
• Oscillating;
• Angle grinder (angle grinder);
• Surface grinding;
• Orbital.

Not only abrasive wheels, but also brushes can be installed on the angle grinder. So, nylon brushes are actively used for grinding wood. They allow you to make the surface not only smooth, but also to highlight the texture of the wood, choosing softer fibers. This process is called brushing.

For large surfaces made of wood and materials based on it (veneer, chipboard, fiberboard, plywood), belt and surface grinders are best suited.

Restorative abrasive polishing of the body

Before you polish the car with your own hands, you need to take care of the tool and consumables. There are two ways to abrasively repair damage to the paint layer. Manual and mechanical (using a grinder). For beginners, lovers of independent work, experts advise first to try their hand at manual abrasive polishing, which requires less material costs.

For manual grinding of paintwork you will need:

• Abrasive grinding cloth (R-2000, R-2500);
• Spray for water;
• Special napkins or cotton rags;
• Polishing pastes and polishes.

How to polish a car at home

Naturally, home conditions mean a dry, well-lit garage. It is impossible to polish a car outdoors or in the yard even in warm summer. Dust blown by the wind, fallen leaves will spoil the results of your work instantly. Uneven drying in the sun of many types of pastes and polishes is also important, which affects the quality of work, the general appearance of the machine.

Reasons for the need to polish and restore paintwork

The main reasons for the need for polishing are natural aging of car enamel and dirt on domestic roads. All road debris raised by the movement of passing and oncoming vehicles leaves marks on the body of your car. Micro-scratches are difficult to see with the naked eye, but their accumulation affects the reflectivity of the varnish. noticeable on the paint are traces of hard sand, gravel, flying stones, roadside branches hitting the body.

The scuffs and dull color of car paint are caused by road chemicals, winter sprinkling of highways with salt, sand, and chemical reagents. Various bischofites and modified calcium have a destructive effect on the body paintwork. Acid rain, hail, dirty snow leave traces on car enamel.

Oddly enough, but auto mechanics consider an important cause of scratches and scuffs to drive on an automatic brush wash. From regular cleaning with rotating brushes, body paint (especially soft enamels) loses its shine and tarnishes. And if the owner of a car wash saves on timely replacement of worn brushes, the hard ends of the bristles leave deep scratches on the paint. Road dirt is stuffed into micro-scratches and small chips, expanding and deepening damage.

In addition to the loss of gloss and brightness of the factory color, all damage to the paintwork is dangerous with more serious consequences. Scratches, overlapping each other, completely cut through the paint layer and can become centers of rust, which will require expensive body repairs with repainting of the car.

Every driver wants to restore the perfect shine of the body and glass, but the services of branded technical centers and road detailing studios are not available to an ordinary car owner every two to three months. With limited financial resources, many Russian motorists have no other choice but to polish the car themselves.

Choice of pastes or gels. How to polish the car.

In addition to polishing technology, the question is no less important than polishing the car. Having understood the basics of production processes, you need to choose polishing pastes, protective and restorative polishes. It is customary to divide polishing pastes into powder and gel. The first type of pastes is chosen for hard coatings with numerous damages and polishes the enamel with a reduction in grain size.

Gel pastes work more gently, they are used to polish soft paintwork of budget foreign cars with relatively little damage. Gel (pasty) and aerosol (liquid) pastes in cylinders are used for various parts of the body. The gel paste is applied to the polishing wheel, it is convenient to process the side surfaces (doors, fenders) of the car with it. Aerosol paste is sprayed on the roof, hood, trunk of a car, and then rubbed with a soft polishing wheel.

When using abrasive polishing pastes, remember that the number of polishes is not infinite. Each polish removes a layer of paint, polishing the machine weekly, you will wipe the paint off in a year.

In the same way, abrasive polishing of the car is performed after body repairs and touch-ups of the car. In this case, its goal is to level the paint layer, eliminate paint drips, “shagreen”. After painting, it is better to use gel polishing pastes.

You can see in more detail how to properly polish the car on:

Abrasive body grinding operations

Before use, cut the sandpaper into small pieces and round off their edges so that sharp corners do not leave deep scratches. Manual grinding begins with a small area of ​​the body, then moving from it in different directions. Before grinding, the surface is moistened with water from a spray.

The paint soaked with sandpaper is sanded in two perpendicular directions, achieving an even matte paintwork color. The process is repeated several times, wiping off the water with a damp and dry cloth. After sanding P-2000, the second grinding can be done with sanding paper P-2500. After that, with a fine-grained sponge or a plastic card, a polishing paste is applied to the polished area and rubbed with force in a circular motion with special tampons or napkins.

Polishing after sanding will be much faster if you use a sander. Instead of a machine, you can use an electric drill with a special attachment (only drills with adjustable speeds are suitable).

For mechanical polishing, you will need to add the following tools to the original set:

• Grinder (with adjustable speed from 700 to 3000);
• Protective glasses;
• Grinding and polishing discs;
• Mandrels for fixing discs of various thicknesses;
• Felt or fur polishing wheels;
• Hard brush for cleaning circles.

In the process of mechanical polishing, the machine is driven in a circular motion. Start at low speed, making an effort to rub in the polishing paste. In the future, the revolutions increase, reducing the clamping force. Begin to work with coarse grained pastes and hard circles. According to the results of polishing, they are successively changed to softer circles and pastes with small grain size.

Working with a grinder requires experienced skills, so before polishing the car body, you can practice on the removed body part. With the wrong choice of the grain size of the paste, the rotation speed of the disk and the pressure force, the car enamel can be erased to metal, burned out (iridescent tarnishing spots appear, the paint swells). The bends of the body, curly stampings on the hood, fenders, doors, which need to be polished with particular care, become especially critical places.

Preparatory operations

The garage must be cleaned before work, removing dust as much as possible. Experienced auto mechanics advise against polishing the car at sub-zero temperatures and in heat (over 35. 40 degrees). Before starting polishing, a number of preliminary operations are required:

• Body wash (manual or contactless);
• Removal of stains and stubborn dirt (oil, bitumen);
• Pasting decorative parts (chrome, nickel, rubber, plastic);
• Inspection of a clean body (the choice of abrasives, the granularity of polishing compounds depends on the degree of damage).

After washing, stains of bitumen, oils are clearly visible, which are removed by hand, mild solvents, degreasers, white spirit. In this case, you do not need to use screwdrivers and knives. After soaking the stain, it is easy to remove it with a fingernail or a plastic card.

In order not to damage the decorative elements (glass edging, moldings, mirrors), they are pasted over with masking tape. Professional polishers also remove nickel-plated door handles, but beginners are not recommended to do this during their first experiments.

Experienced lovers of independent work with the car, simultaneously with polishing the body, polish the glass of the car. Technologically, the operations differ little (only in the compositions of pastes and protective agents), having gained experience, you will be able to polish glass yourself. At the first attempt to polish, it is better to glue all the glasses.

Size 240-480

It is smaller. It can be used for finishing coarse, fibrous fillers. Also, it is often used for the primary treatment of soft or liquid putty. After applying the primer, streaks are removed from the parts with such paper. This grain size is most often used by car enthusiasts.

• Kinds

• Grain size 60-180
• Size 240-480
• Size 600-800
• Size 1000-1200
• Size 1500-5000

Useful Tips

This is coarse sandpaper. It is used for roughing the body. Most often, it is used to rip off old paint. It is also possible to clean rust with such paper if it has eaten hard enough into the metal. When using a coarse-fiber putty to repair damage, such an emery cloth is able to smooth it well. Be careful when using such coarse abrasive material. Do not handle areas without rust. Coarse grains can damage the iron, causing rust.

Size 1500-5000

After painting, it is recommended to polish the body. To do this, you need the finest sandpaper. By using it, you can bring the body to perfect condition.

Size 600-800

With the help of such paper, rub a soft putty just before applying the primer. This paper is fine enough to minimize damage to the car body while still producing a fairly smooth surface.

What kind of sandpaper to clean a car before painting? Read and memorize

Almost every driver was faced with the need to paint a car. That’s when the question arises, what kind of sandpaper to clean the car before painting. This material is used in several stages of restoration of the body paintwork. Each of them uses its own kind of sandpaper. This is due to the surface requirements for processing, as well as the grain size. The correct selection of sanding paper will allow you to do the job as efficiently as possible. The choice of sandpaper is one of the main points in preparation for painting your favorite car.

What kind of sandpaper to clean a car before painting? Before answering this question, figure out what exactly you are going to do with the car, as well as how much corrosion has eaten into the body. In some cases, there is not enough sandpaper, then you will have to use a grinder for work. In practice, the entire range of sandpaper can be used for painting. Below we will analyze the main types and methods of application.

Size 1000-1200

This sandpaper is used for treating the soil immediately before painting the body. The task is to grind the part, but not damage the primer layer. Therefore, for this work, such small paper is used.

How to grind putty on a car using a grinder

The use of special equipment will be especially important in the initial stages, when large balls of putty need to be removed. Finishing work is done by hand. At the same time, when working with equipment, you should adhere to the following rules:

• Avoid high revs, it will be easier to control the process. In addition, high RPM can lead to overheating of the device;
• Do not press hard on the equipment, otherwise the grinding efficiency will decrease;
• Using a soft substrate, you can reduce the level of pressure on the surface, which will allow better processing of the body;

• While working with a sander, the risks will not be as large as when manually grinding;
• In no case should the machine be stopped in one place, it should be constantly moved. Movements should be smooth, without sudden jerks. New passages should go to the previous ones by 50% of the length;
• Do not sand with one edge of the sole, especially when using coarse abrasives. It is important that the angle is as small as possible.

Abrasive Size Standards

There are several of them at once, while in our country the FEPA standard has received the greatest popularity (you can understand by the letter P, which stands in front of the numbers on the marking). Another popular option is the American ANSI / CAMI standard. They are quite similar, the main differences appear in the case of fine abrasive materials (marked 600 and above).

Process features

Before deciding what kind of sandpaper to clean the putty on a car, you should understand that sanding is a rather laborious task, during the work it is important to do everything so that only a thin layer of putty remains, so the alignment will have to be performed several times in a row. As a result of cleaning, almost 90% of the putty will be removed.

It is important to do everything very carefully and seriously. You may not enjoy sanding, but without the proper diligence, quality bodywork will not work. Before starting sanding, prepare all necessary materials and room.

An overview of how to properly sand putty on a car:

Abrasives with mesh backing

At the same time, the use of abrasive paper is not the only option for how to properly sand putty on a car. In addition, there are also special mesh fixtures. They are made from high-strength polyamide or nylon material that is bonded with cross-linked fibers. Abrasive elements (aluminum oxide) are attached to them.

These materials are excellent for any type of sanding. They are distinguished by increased stability, while even if water is used, the devices will not fly off during operation.

Although there is less abrasive material on the screens, it is used with maximum efficiency. Dust does not adhere to the surface of the material. Thanks to this, it can be easily removed with a vacuum cleaner.

Among the advantages of the sanding mesh are:

• High productivity;
• Increase in work efficiency up to 40%;
• No contamination of the material;
• Simplicity of work, since the processed surface is ground as uniformly as possible.

Preparatory work

If you are interested in what kind of sandpaper to grind the putty on the car, then, first, think about where you will perform all the necessary work. It is important to note here that such activities should be carried out in a well-ventilated area, since many small dust particles will get into the air.

To get rid of the bulk of the dust, it is recommended to periodically vacuum during work. Personal protective equipment is also worth considering. First of all, we are talking about a respirator and gloves.

Features of hand sanding

Such a solution is suitable in the absence of special equipment. In addition, hand sanding is essential when working in hard-to-reach places. In the course of such activities, a number of features should be adhered to:

• Using a long bar, you can level out defects that are not felt even after touching with your hand;
• Using a block, make crosswise passes, up and down and back and forth five times to each side. Do not grind one place, otherwise it will lead to the appearance of depressions;
• Use only clean sanding paper. Its operation is suitable until the time when you feel that material is being cut;
• It is important to gradually switch from a larger abrasive to a small one (40-60 at a time, for example, from 120 to 180). As a result, you will save your time and effort;

• Apply masking tape to the adjacent panel to protect it from unintentional damage;
• No need to wait for the filler to fully harden. Within 5-10 minutes after applying it, you can start grinding. If you use medium abrasives, you need to wait for the surface to completely harden;
• Keep in mind that in modern cars, the body can be very thin, due to which the metal will bend during work. Take this fact into account so as not to remove too large a ball of putty;
• For rounded surfaces elastic bars can be used.

What is an angle grinder

Angle grinder is colloquially called angle grinder. The instrument first appeared in the Soviet Union in the seventies of the last century. It was imported from Bulgaria, hence the everyday name of the device. It is used in construction, wood and metal processing. The tool motor axes are at right angles to each other, the body is cylindrical, the handle is most often on the side.

For material processing, the angle grinder is used abrasive wheels of different thickness, which are attached to the shaft. Most often, angle grinders are used to cut metal, tiles, bricks, ceramics, concrete, granite. Flap discs are used for surface grinding.

The better to grind wood with an angle grinder or sander?

Wood. The most environmentally friendly, and therefore the most popular material for construction and decoration. The appearance of the finished product largely depends on the quality of its grinding. You can handle a wooden surface by hand, but it is easier to use an angle grinder or a special grinder for this. Let’s take a look at the pros and cons of each of these tools to see which one is best for removing the surface layer from wood.

Sander

This is a professional tool that allows you to efficiently process large surfaces for finishing. The principle of operation is that sandpaper is fixed to the base of the sole varying degrees of abrasiveness.

When the device is turned on, the sole starts to move. Due to this, the surface is sanded. Grinding machines are:

• Eccentric. They can be used for polishing parquet and even car bodies. With their help, you can very delicately and extremely accurately grind a wooden surface, with the exception of corners and shallow recesses where the disc cannot reach.
• Vibration grinders. They can process not only wood, but also plastic and stone surfaces due to the possibility of speed regulation. Has a rectangular sole, ideal for large areas.
• Delta grinding. Triangular outsole allows for precise fine sanding of corners and edges.
• Multifunctional. This type of tool can be used both for large volumes of work and for processing hard-to-reach areas and corners. Additional attachments to the soleplate in the form of an iron allow you to sand even a profile.

There are also belt, for roughing, and polishing machines for giving an absolute smooth surface.

Angle grinder or sander. What’s the difference

Both appliances are varieties of the same electric tool. Angle grinder. They differ in power and actual capabilities. So, if some models are used mainly for cutting, others are more suitable for grinding.

The angle grinder in the form in which it is presented by most consumers has a relatively small power, simple functionality. With long-term continuous operation, the engine 1.5 kW overheats and has to be turned off. It can be successfully used exclusively for domestic needs; such a tool cannot cope with large volumes of work.

Professional grinders are equipped with a much more powerful motor from 1.8 to 2.5 kW, which provides continuous continuous operation. In such tools, you can adjust the speed, they have greater productivity.

Which to choose. A grinder or an angle grinder

When buying a device, you must first of all decide, what it will be used for. Working with wood has its own subtleties. Improper or insufficiently thorough processing with an unsuitable tool can ruin the entire appearance of the product.

Conventional angle grinder is inexpensive, simple and economical to maintain and repair. It can quickly grind wood using a flap disc. Sandpaper attached to a rigid round base. There are discs of various abrasiveness, which should be selected based on the goal. However, the quality of such processing will be low: the surface will be smooth, but not entirely even. The reason for this is high revs, in addition, the tool has to be constantly kept on weight.

This method is good if you need to grind, for example, a picket fence, boards for a sub-floor or ceiling. But it is not suitable where it is important to get a perfectly flat surface, as well as for processing corners and other reliefs.

For these purposes, it is better to use professional grinders. Belt, or “tanks”, when roughing, when it is necessary to remove a thick layer of wood, vibrational. At an intermediate stage and eccentric. At the final, when you need to finalize the product.

The use of several types of grinders is preferable because it is required by the technology of grinding wood surfaces. Begin sanding using coarse-grained abrasive paper. 60, then 80 and gradually increasing graininess up to 150-180.

When processing wood after sanding with a tool, it is recommended to finish it by hand, as otherwise, covering it with wood stain or paint, you will notice traces of the tool. The wood should be sanded strictly along the grain with quick, light strokes. At the final stage, when fine-grained sandpaper is used. Practically without pressure.