What types of grinders are there? How to choose the right type?
Grinders are a fairly large group of power tools intended for finishing operations. It is a precise method that allows achieving dimensional accuracy of class 5-6 with a high level of smoothness. Depending on the material and previously performed operations, different types of grinders are used. Below we have gathered the most commonly used ones along with a brief description of their construction and applications. Check which of them are worth having in your home workshop.
Types of grinders and their applications
A wood sander has a completely different construction than a model intended for metal. This is due, among other things, to the hardness of each of these materials. The mode of operation also depends on the shape of the surface being worked on. In hard-to-reach places,mini grinders with a very small disc or a finger tip are useful. This also makes it possible to work on holes of small diameters. So it is reasonable to ask, which grinder for drywall will be best, and which will perform well on metal surfaces? You will find answers to such questions below.
Construction and application of the angle grinder
By far the most popular is the angle grinder. What is it used for? It can successfully be used to clean and smooth metal surfaces. However, it is also often used for cutting steel or ceramics (for example kitchen and bathroom tiles). Because of its popularity it has acquired many regional and nationwide names. Among them are:
Gumówka.
Boszówka.
Boszka.
Fleksa.
Kątówka.
Platerówka.
Diaks.
Grajnerka.
Bakielitka.
These are not types of angle grinders, but colloquial names used in different regions of the country. A characteristic feature of this device is the arrangement of the disc parallel to the housing (and to the motor axis) – hence its name. A metal grinder has interchangeable cutting discs (flap discs) or a round disc with an adhesive pad for sandpaper.Abrasive discs of different grits can be easily changed during work.
Random-orbit sander – what is it? And what is it used for?
Different types of grinders are intended for different methods of processing flat surfaces. In the case of random-orbit models, the disc performs two movements simultaneously: rotational and oscillatory. At the same time it has a flexible sanding pad that adapts to irregular shapes (concave and convex). That is what determines the popularity of the random-orbit sander.What can it be used for? Practically for any type of material, particularly metal or plastics. It is also an excellent sander for cleaning wood, due to its good adaptation to the cleaned surface.For body shops, but also for home use, there is the pneumaticrandom-orbit sander. It is powered by compressed air, which allows achieving even higher cutting speeds and, as a result, a smoother surface.
Oscillating sander. Applications
Oscillating models are often confused with the random-orbit solution: the oscillating sander for metal. However, this one has a rectangular sanding plate with greater stiffness. For this reason it can only be used on flat surfaces. The smoothing of the processed material is achieved by the pendulum movement of the plate – similar to the previous case. Here, however, there is no rotation, which affects the surface structure processed by the oscillating sander. Applications for this type of models are various:
Carpentry. Which oscillating sander for wood is best? It depends on the hardness of the wood and the desired smoothness.
Renovations.
Finishing works, including working on walls.
Metallurgy, especially for removing rust and preparing parts to be joined by welding.
Smoothing edges and corners of ceramic tiles.
It is also an excellent sander for paneling and wooden floors before varnishing. In terms of materials it is a universal solution, but it works mainly on flat surfaces.
Bench grinder
A bench grinder has a distinctive construction: it is significantly larger and heavier than other models, which also affects its mobility. Therefore it is mounted in a fixed place and has two rotating wheels. Every garage should have a place for a bench grinder. What is it used for then? For smoothing small details, in particular removing burrs and dulling sharp edges. You can also easily sharpen kitchen knives (steel) on it. These are typical types of grinders for metal, wood and other metals. However, they are mainly used for metal details.
Belt sander
Another interesting solution is a sander with a belt of sandpaper. In this case there is no plate making oscillating movements nor a rotating disc. Instead there is a sanding belt that moves along the underside of the device in one direction. Such types of grinders require appropriate inserts: looped belts of the correct length to fit the specific model.If you are wondering which sander for wood to choose, it is worth first checking belt models. They work well for sanding wide countertops, floors, paneling, solid wood, and even veneered surfaces. They are intended both for smoothing newly laid raw surfaces that will be finished later, and for repairing such surfaces.
Delta sander
What distinguishes the triangular sander? The shape of the pad, resembling a delta, a triangle, and sometimes more of a pentagon, hence its other name: pentagonal sander. What is this construction used for? It certainly makes it easier to sand hard-to-reach places, in particular corners bounded by two walls. At the same time, the large working surface guarantees maintaining appropriate flatness: typical mini grinders are not suitable for finishing large, flat surfaces.What movement does the pad of this model perform? The most common is the triangular oscillating sander, but there are also random-orbit models. They are mainly used for processing wood, although changing the abrasive allows working on other materials as well.
Grinder for metal
Above we described the typesof grinders and their applications. However, most of them can work with practically any material. So which grinders for metal should you choose? Much depends on the type of elements being processed. Sheet metal workers often use random-orbit models. Meanwhile the right tool for cutting metal is the angle grinder.For holes in metal parts an ideal choice is a grinder for hard-to-reach places, i.e.straight die grinder. Depending on the diameter of the hole, tips of various sizes are available.
Sander for wood
In our shop you will find various types of sanders for wood. Oscillating and belt models are very popular and work particularly well on large, flat surfaces. Meanwhile the random-orbit sander, thanks to its flexible pad, will make it easier to work on branches and rounded edges.Of course, it is also possible to sand wood with an angle grinder. Especially for a small amount of such parts it is not always worth looking for additional devices. A Boszówka will do the job just as well, although it will require more attention and time.
Concrete sander
An angle grinder will handle grinding and cutting concrete very well. In our offer there are various discs available, including diamond ones, intended for the hardest materials, which certainly include concrete—even reinforced concrete. A sander for grinding concrete floors can also have an oscillating or random-orbit design. This ensures high flatness of the entire floor.
Sanders for plaster and skim coats
Which sander for skim coats will be best? For a small renovation you can opt for universal angle models. However, when working frequently with such material, pay attention to the large amount of dust and debris produced. After just a few minutes it is necessary to take breaks and ventilate the room, which negatively affects the efficiency of sanding. For such users there are sander models with the possibility of connecting a vacuum cleaner. They are more enclosed and have an inlet for a hose through which the generated dust is sucked directly into a bag.
What to consider when choosing the right sander?
What should you pay attention to when buying your first sander? First of all, consider what it will be used for most often. For a large amount of work it is sometimes worth choosing several solutions to speed up the tasks. What parameters play the biggest role?
Shape of the working surface
A sander for corners must have a pointed pad in the shape of a triangle or delta. For cutting it is worth choosing an angle grinder with a rotating disc. Flat pads work well on large, flat surfaces because they prevent creating depressions.
Number of rotations or oscillations
This parameter can often be adjusted by the user within certain limits. The more rotations, the more material will be removed from the piece. For cleaning material from rust or cutting, high-speed models are worth choosing, while for maintaining high dimensional accuracy somewhat slower sanders are used.
Material to be worked on
Although every type of sander can be used with most materials, each has certain characteristics. It is worth checking whether a given model will perform well for a specific application. A universal solution for the home is often an angle grinder for metal.
Additional equipment
In the case of a sander for wooden furniture or skim coats, it is worth investing in a model with the possibility of connecting a vacuum cleaner. This will make the work easier and help keep the workspace tidier. Meanwhilepneumatic sanders use air pressure to work with greater precision and speed. Such additional options make the work easier and increase its efficiency.If you are not sure which solution to choose, describe your situation in an email to us. We will gladly suggest which sander will best meet your expectations. We will also advise which additional accessories are worth buying, especially abrasives and discs for working with a given model. Don’t wait and take advantage of our help now.
Car warning vest should be in every vehicle – in case of a breakdown it will allow the driver standing next to the vehicle to remain visible even after dark. However high-visibility vests are also an essential piece of equipment for construction workers, road workers and many other jobs. Check what to consider when buying a warning vest!
Is a warning vest mandatory?
A warning vest is an inexpensive item of clothing that everyone should have. It is useful not only in the car, but also when cycling after dark or even as protection for a pedestrian walking on the roadside.
Do you have to have a warning vest in the car? Polish regulations do not impose such a requirement on drivers. They indicate, among other things, the need to have a reflective triangle and a fire extinguisher. Although you won't get a fine for not having a warning vest, it is definitely worth having one. If you often travel with passengers, it's best to equip yourself with reflective vests in quantities sufficient to provide visibility to passengers if needed.
Reflective warning vest – a requirement in many professions
While a high-visibility vest for a motorcycle, bicycle or car is not required by regulations, in some professions it is. Professional high-visibility clothing is a necessary part of the wardrobe for airport workers, heavy equipment operators, construction workers, and people performing official duties on roads or in railway areas.
As for warning vests, regulations in 2023 require them to be one of three colors: yellow, orange or red. In addition to fluorescent colors, they must also have reflective elements.
High-visibility clothing is divided into class one, two and three. In the case of warning vests only classes one and two are possible, because class three requires reflectors on the sleeves or trouser legs. Such a standard is met, for example, by warning jackets.
A class one high-visibility vest must have 0.14 m2 of fluorescent background, while the total area of reflective elements must be 0.10 m2. For class two these values are 0.50 m2 and 0.13 m2 respectively. A professional class 2 vest is ORLA Warning Vest. Available in two colors – orange and yellow, it meets EU standards EN ISO 20471 and EN ISO 13688. Two reflective strips 5 cm wide provide visibility, and the anatomical fit guarantees comfort of use of the reflective warning vest both during work duties and while traveling by bike, motorcycle or on foot.
Summer and winter warning vest to suit your needs
When choosing a reflective warning vest for pedestrians, cyclists or motorcyclists, pay particular attention to its size and the quality of the material. Contrary to appearances, fit is very important – especially if you will be wearing the vest for a long time. This type of body-protecting clothing is available in standard sizes – from S to 3XL. Importantly, these products are not divided into men's and women's high-visibility vests – they are universal garments with a simple cut.
In cold months, an insulated work warning vest will provide protection against cold, wind and precipitation. The REMS insulated warning vest model has a warm inner layer. An additional convenience is a zipper closure instead of traditional Velcro. This solution allows better protection against low temperatures and weather conditions. The REMS warning vest also has two inner pockets that allow for storing accessories useful at work.
How much does a reflective warning vest cost?
Purchasing a reflective PPE vest will not usually ruin the household budget of someone who wants to be visible while cycling or to have such important protection in the car.
You can also find much cheaper products in stores and at online auctions. Do yellow and orange reflective vests for 4–5 PLN differ from those from a trusted manufacturer costing a dozen or so zlotys? Although they may look the same at first glance, you will notice the difference in how long the product lasts. The reflective warning material on high-quality vests is much more durable – it retains its shape after many wash cycles. Meanwhile, cheap reflective vests often lose their properties after just 2–3 washes.
So if you don't want to spend two years wearing a vest that has never been washed, choose a higher-class product. Quality matters especially when you buy reflective warning PPE vests for your employees.
Of course you'll pay more for an insulated warning vest with pockets. For the aforementioned REMS model you'll pay 166 PLN. In this case, however, you should particularly take quality into account. A vest of poor quality, made of non-breathable material, will cause significant discomfort during work. It is definitely better to opt for products from a trusted warning vest manufacturer.Author: Paweł Sokołowski
WHAT IS THE CE MARK?
The CE marking (Conformité Européenne) is the European conformity mark. Its use on a product's packaging indicates that the manufacturer has applied and fulfilled the relevant requirements contained in European directives/regulations, as well as in the European standards covering the product. A product that meets safety requirements will be marked with the CE mark, thereby informing the user that it is safe and has been properly placed on the market.WHY WAS IT INTRODUCED?
After the European Union removed trade barriers between Member States and established a common policy toward partner countries outside the EU, an area of free movement of goods was created within the Community. However, the main barrier to trade remained national requirements concerning, for example, the quality and safety of products. The national systems of regulations and standards used by countries often differed significantly from one another. This caused a range of problems for manufacturers who, in order to sell their product in different countries, had to meet separate requirements each time.
Because consumer safety could not be compromised by eliminating standards, the only solution was to harmonize national systems so that goods would be subject to the same requirements throughout the Community.
In 1993, European legal acts called NEW APPROACH DIRECTIVES were created at EU level. They defined essential safety requirements for different groups of products that must be met before they can be placed on the market or put into service on the Single European Market.
IS CE MARKING MANDATORY OR VOLUNTARY?
if a product falls under one of the New Approach Directives, CE marking is mandatory.
applying CE marking to products that are not subject to the New Approach Directives is prohibited.
WHO CAN AFFIX THE CE MARK?
CE marking may be affixed by the manufacturer or their authorized representative. Most products fall under Module A, i.e., the manufacturer's self-assessment module. If another module applies (B or D), an EU type-examination certificate must be obtained in cooperation with a notified body (a certifying institute).
WHAT IS A CE CERTIFICATE?
The term "CE certificate" does not exist in the nomenclature of the New Approach directives. If someone talks about a CE certificate, they most likely mean the EU declaration of conformity or the EU type-examination certificate confirming the product's conformity with the relevant EN standard.
Currently, the process of marking and certification is regulated by Regulation (EU) 2016/425 of the European Parliament and of the Council of 9 March 2016 on personal protective equipment and repealing Council Directive 89/686/EEC.
Source: https://www.oznakowanie-ce.plAuthor: Grzegorz Nowak
In 2022 as many as 66,606 occupational accidents were reported in Poland. 365 of the injured suffered very serious injuries, and the number of fatal accidents amounted to 180. In almost 80% the lower or upper limbs were injured. Among the most common causes was contact with a stationary or moving object. These data clearly indicate how important it is to provide employees with appropriate protective clothing.
Differences between protective clothing and workwear
To begin with, it is worth dispelling an important mistake. The term „occupational protective clothing (PPE)” and “workwear” are often used interchangeably. However, they do not mean the same thing. To fully answer this question, it is useful to know the exact definitions of both concepts.
Definition of workwear and protective clothing
Workwear is clothing used in the workplace when there is a high risk of soiling or damaging outer garments. In other words, workwear replaces the employee’s clothing in situations where it may become dirty or ruined while performing duties. The use of uniform work outfits may also be related to building brand recognition (e.g., bank or insurance company employees).
And what is protective clothing? The definition states that it is clothing used in the workplace that is intended to cover or replace personal clothing. In addition, it is designed to provide protection against hazards. Both conditions must be met, so workwear that does not protect against specific dangerous substances or events is not protective clothing.
Applications of workwear and protective clothing
When is protective clothing used? Examples of such situations can be found in every industry. It is most often used by employees on production floors and those working in the field, and its purpose is to protect against impacts and cuts (such as protective boots with a steel toe cap). There is also protective clothing for welding and heavy aprons for laboratory technicians who come into contact with hazardous substances.
Work clothes are used even more frequently. They can be found in organizations that care about brand recognition linked to employee attire. Work uniforms are also widely used in the catering industry.
Types of protective and work clothing
Any clothing can be divided according to the part of the wardrobe it represents: protective or work gloves, trousers, jackets, boots or vests. It is worth paying more attention to the classification of protective clothing depending on the hazard it is meant to protect against. In this context, one can list:
Protective clothing for welders, protecting against electric arc, burns and splatter.
Harnesses related to working at heights.
Insulating protective clothing, used by electricians.
High-visibility clothing, protecting road workers, as well as emergency services operating at the scene of a road accident.
Chemical protective clothing, resistant to short-term exposure to hazardous corrosive substances.
Protective earmuffs that protect against excessively loud equipment noise.
Flame-resistant protective clothing for firefighters and people working near open flames.
Additionally, categories of protective clothing may also concern seasons, such as winter and summer protective clothing.
Protective clothing markings
Types of protective clothing can also be characterized by the areas of the body they are meant to protect.
Protective clothing (symbol U).
Lower limb protection (symbol N).
Upper limb protection (symbol R).
Head protection (symbol G).
Face and eye protection (symbol T).
Hearing protection (symbol S).
Respiratory protection (symbol D).
Protection against falls from height (symbol W).
Full body insulating protection (symbol I).
So how to choose the appropriate protective and work clothing for your workplace? That is always the employer’s responsibility!
Employer's obligations regarding protective and work clothing
Under current labor regulations, the employer is obliged to provide the employee free of charge with workwear, protective clothing and personal protective equipment (PPE) if required by the working conditions. Importantly, the decisive factor is the conditions prevailing in a given work environment, not, for example, the job title. For this reason, employees in similar positions at different companies may receive a different set of clothing.
Protective clothing is the employer's obligation
The employer must determine what professional workwear and protective clothing are needed for each employee. This usually takes place during a dialogue with employees or their representative. These arrangements are then entered into the work regulations, which define the conditions for being in the workplace, as well as equipping employees with tools, materials, protective and work clothing and personal and hygiene protective equipment. Typically the details are presented as a protective clothing allocation table for each position.
Work clothing and footwear provided by the employer
Work and protective clothing are provided free of charge. At the same time, they remain the property of the employer. This means that upon termination of employment, all personal protective equipment and allocated clothing must be returned to the supervisor. Also, in the event of clothing being destroyed due to the employee’s fault, reimbursement of the purchase costs is required (after accounting for depreciation).
Employer's duties regarding employee safety
The employer’s duties related to protective clothing and workwear also include cleaning, maintenance, repair, dust removal and disinfection. However, employees often wash their work clothes themselves. In such cases they are entitled to reimbursement of the costs they incur.
Standards and certifications of workwear and protective clothing
Workwear does not require certification, because its primary task is to protect personal clothing from dirt or damage. However, specialist protective clothing for workers must meet specific standards and criteria in order to effectively protect against hazards in the workplace.
Clothing materials: what determines their protective properties?
Protective garments are made from natural materials (cotton), regenerated (cellulose-based) and synthetic materials (polyester or polyamide). From these, several dozen popular materials with specific properties have been developed. Among them you can find:
Ortalion made from polyester. It is characterized by very low weight and high resistance to damage.
Fleece, a soft and warm polyester knit.
Stretch, i.e. stretch fabrics with added Lycra or PBT.
Corduroy, a warm cotton fabric resistant to cuts and tears, but prone to abrasion.
Ballistic nylon, also used in the production of bulletproof vests. It is very resistant to damage and abrasion.
Kevlar, an elastic material that is also extremely durable.
The choice of the appropriate material depends on the work environment and the conducted occupational risk analysis.
Certification by EN ISO standards: what does it mean for protective clothing?
In Poland, EU Regulation No. 2016/425 of 16 March currently applies. It specifies a number of standards for particular types of protective and specialized clothing. It is there that the exact parameters that protective clothing for firefighters, welders and other positions must meet are defined.
All protective garments must also have certificates confirming compliance with the above standards. To obtain them, clothing undergoes rigorous laboratory tests, which must then be repeated at regular intervals.
Summary: protective and work clothing
There are still many workplace accidents in Poland. To provide employees with the best possible protection, protective clothing and personal protective equipment are used in accordance with the protective clothing allocation table. Each such garment must meet protective clothing standards, confirming protection against hazards in the working environment.
In many positions, an employee also receives workwear that protects personal clothing from damage or soiling. In this case, there is no need to obtain certifications.
Both workwear and protective clothing belong to the employer, who should care for them: clean, repair and maintain them.Author: Grzegorz Nowak
