Where to sharpen a lawn mower blade

How to sharpen lawn mower blades by yourself? How to sharpen lawn mower blades

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The blades of different lawn mower blades are almost always made of high quality steel, but despite this, they still need to be periodically sharpened. And the main thing. Do it in a way that does not degrade the quality of the metal. However, no special tools and skills are required for this, and any dacha owner will be able to cope with such a task easily!

Why do you need to sharpen lawn mower blades??

Of course, cutting the excess lush green grass from your favorite lawn is quite realistic and a knife with blunted edges. Here’s just the grass as a result of such manipulations will begin to stratify (this stratification will go mainly in the longitudinal direction), gradually turning into a messy fringe. And after a few days, it will be dry and may even be sick for a few weeks. That is why the cuts should always be neat and flat. In this case they only take a few hours to heal and allow you to keep your lawn looking lush green. And for them to be such, it is necessary to periodically sharpen the blades of used lawnmowers!

Taking the knife off

Before embarking on such an important activity, it is important to try to protect both yourself and the garden gadget as much as possible. This is especially true for gasoline lawnmowers (models with an electric drive are easily disarmed by elementary disconnection from the mains): first you need to free the spark plug from the cap, and then you need to completely eliminate the possibility of fuel leakage. There are two ways to do it. either by draining the tank or by putting a rubber leakproof membrane under the cap and closing the fuel tap. Unless otherwise instructed, turn the mower only in the direction of the handle. Before you do this, you need to squeeze the hose that is supposed to be connected to the crankcase gas exhaust. This prevents oil from leaking.

The blades in the different models of lawnmowers can have a variety of configurations, but the threads on the bolts always unscrew the same. counterclockwise. And to prevent possible rotation of the shaft, you can place a block firmly pressed into the ground under the knife. And of course in order not to make any mistakes when putting the blade back it is important to try to memorize or even sketch the position of the blades.

What to do next?

The removed blade must always be cleaned of hardened grass sap and any dirt that may have adhered to it. The easiest way to do it is to use a metal pencil. Then the surface of the knife is examined for any distortions or bumps. If there are such, they are corrected by the usual hammer with a little rounded edge of the striker. As a rule, the knife starts to straighten from the edges of the curved area, gradually moving to the center of it. It is also helpful to check the ejector blades, which are often unbent from blows, because if they are bent at different angles, it will inevitably lead to poor airflow, and as a result the cut grass will not be mulched properly.

Next step. Removal of the escapement. At first they get rid of the dented chippings, deducing the edge of the blade under the same angle along the whole length of the cutting part. A small file or electric grinder equipped with a carborundum stone will help to bring a descent to needed angle. It is important to try to remove the metal from the knife as evenly as possible. But an angle grinder for these purposes is categorically not recommended, as it can significantly degrade the quality of the sharpened blade.

Sharpening the blade

To sharpen the blade, you usually use a flat sanding block with a grit size of 400 to 600 grits. Before you sharpen the blade, it is advisable to soak it in soapy water for about ten to fifteen minutes. From time to time during the sharpening process this action should be repeated. And the knife should be sharpened by pulling the bar in the direction from the center of the area to be sharpened to its edge. In doing so, it is desirable that the stone is in the same position. this will help keep the angle constant. And of course you should ideally grind the same amount of metal from the blade!

Sharpened blades must also be “corrected”. you need a small piece of sandpaper with a grain size of 600 to 800 grits. The paper is moistened with water and rolled into a cylinder, the diameter of which reaches about 100. 150 millimeters, and only then proceed to “straighten”. And before putting the blade back on the lawnmower, it’s important to make sure that the weight of its shoulders remains the same, otherwise (in case of an imbalance) it can cause a highly undesirable vibration. To check the balance, first horizontally clamp the smooth rod in a vice, and then through the hole in the middle put a blade on it and try to set it horizontally, watching its behavior. One arm should not visibly overstretch the other. If the balance is not maintained, it is necessary to grind some more metal from one of the arms. Only then can the sharpened blade be placed back on the mower!

Although lawn mower blades are made of quality steel, they need to be resharpened from time to time. Fortunately, this does not require any special skills or equipment, and today we will tell you how to sharpen the lawnmower blade yourself without damaging the qualities of the metal.

It is possible to cut the excess grass from the lawn even if the mower blade has obviously blunted edges. However, the shoots will split lengthways into a fringe pattern. After a few days the grass will be rotten and sore for a few weeks more. The cut should be smooth and accurate, then it will tighten in just a few hours and the lawn will always be lush green. This requires that the knife is sharpened almost perfectly.

How to remove the blade from a lawn mower

Before proceeding with the partial disassembly of the lawn mower, you need to protect yourself and it. While an electric lawn mower can be easily unplugged, petrol lawn mowers need to be prepared beforehand. First of all remove the spark plug cover. Next, you should eliminate fuel leaks, that is, either drain the tank, or put a sealed rubber diaphragm under the cap and close the fuel tap. Unless the operating instructions clearly state otherwise, only turn the mower upside down. Before flipping the mower over, remember to squeeze the crankcase exhaust hose so you don’t spill oil.

Lawn mowers use different blade configurations. In the simplest case it is a usual double bladed plate with a compound shape, but the blade can also be compound. the upper blade is intended for mulching the mowed grass. There are also four-blade blades, which can be either composite or on a common base.

sharpen, lawn, mower, blade

The knife can be fastened either with one bolt in the center through a shaped washer or with two bolts with seating on the centering hole or a pin. Anyway the thread on the bolts is to the right, so you have to unscrew them counter-clockwise. To block the shaft from rotating, put a block propped up against the ground under the knife. It is desirable to memorize or mark the position of the blade (s) so as not to mix up when reassembling. Unscrewed bolts temporarily put in free holes.

Knife Sharpening

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The service center is equipped with the latest laser equipment. All service is urgent and in presence of the customer. All work is provided.

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Our masters gladly take your household problems, listen to you attentively and qualitatively perform any order. This can be.

4 Natasha Kachuevskaya St. 8 (917) 522-40-20

We repair shoes of any complexity, dry cleaning, odor removal, replacement of heels, bag repair, repainting, sewing, sewing shoes and much more.

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Request a service, ask for a price

Knife Sharpening. prices

  • House of Life Liliya Dekor: Hello! Grinding costs from 50 p per piece, depending on the material and length of the blade.Ceramics is more expensive
  • Restoration and repair of footwear, suitcases, key making : Afternoon. Sharpening simple table knives, from 50-150₽, depending on length.
  • 12 DIY Domestic Service: Hello Hello! We sharpen, but when we open.
  • Shoe Repair & Restoration : Hello, knife sharpening 200₽
  • House of Life “12 Service”. Hello: Hello! At the moment we can not sharpen, because we do not have a special machine and craftsman.
  • House of Household Prosper-SB : Good afternoon. We can’t help you.
  • 12 Sorts of Service” House of Domestic Goods Hello : Afternoon! Tamara, you can bring us, we have a service, sharpening tools, knives, etc.д. on an ordinary and a professional sharpening machine. Public Utility House “12 Kinds of Service” is located at 18, Vorotynskaya street, Korabel shopping center, ground floor, Moscow
  • Tamara : Thank you very much, we will come one of these days. How much will it cost?
  • House of Life “12 Service”. : I can not say yet, I need to look at the master will say after a visual inspection, if anything, call me, I will give you a discount.
  • Footwear repair and metal repair : Good afternoon, Nikita. The cost of sharpening a knife for a meat grinder. 200 Time 15-20 min. You need to bring a knife and grinder. We will be glad to see you.
  • Urgent express repair of suitcases : We carry out professional sharpening of knives. blades for meat grinders. Metro Slavyansky Bulvar Matveevskaya str. behind a fair near the Railway Platform tel.
  • Service center “Old Master” : We are working in Lyubertsy. 146 Oktyabrsky Ave. Any quality service is worth the appropriate fee
  • Restoration and repair of footwear, suitcases, key making : We work in the district Bibirevo.
  • Remet repair shop : Hello, we have no shop in the south of Moscow. We only serve SAO Leningradskoe shosse 128.
  • Diamond Workshops : Call us to agree
  • ServiceByt repair shop. : We work on m.Serpukhovskaya.2 minutes from the subway.From 100 knife.We sharpen under YOU.
  • Studio Ideal : Good afternoon. you can sharpen at our office.our address m.Kurskaya Radialnaya str.Zemlyanoy Val, d.27, p.2, pod.8, floor.4, office.28. As there is a courier delivery you can order by phone
  • Dom Dom Dom Domestic : Courier delivery to take delivery, bring your order 600
  • Tool sharpening company Anshliff : We are located on Proletarskaya.
  • Center of household services Mr.Shoe Mr.Key : Our workshop works only in Belyaevo.
  • Atelier Dom Dom Dom Dom Dom Dom Dom Erika: Good evening the closest to you m. Electrozavodskaya. Bolshaya Semenovskaya 16 t / d Silver House 2nd floor

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How to order the sharpening of lawn mower blades in Minsk

It is not recommended to sharpen such knives by yourself because of their certain peculiarities. In addition, if you try not to sharpen the tool, you can get hurt. Order sharpening lawn mower blades in Minsk you can simply call the number, and then the result will be a beautiful, well-groomed lawn.

Addresses and phone numbers of workshops for sharpening of garden tools in Minsk:

Fri, Fri: 10.00-19.00 (break: 14.00-15.00); Sat: 10.00-14.00; Sun: off.

Phones: 8 (017) 373-88-99 8 (044) 763-88-99 8 (029) 866-88-99

  • “Master OK” g.Minsk, Moskovsky district, Leninskaya str. 28 Gromova (Malinovka)

Monday to Friday: 10.00-19.00 (break: 14.00-15.00); Sat: 10.00-14.00; Sat: day off.

Phones: 8 (017) 396-64-44 8 (044) 723-68-53 8 (029) 223-68-53

Monday through Friday: 10.00-19.00 (break: 14.00-15.00); Sat, Sat: day off.

Phones: 8 (017) 396-64-44 8 (044) 723-68-53 8 (029) 223-68-53

Knife sharpening Moscow

Guillotine knives grinding in Tula, Moscow, Kaluga, Tver, Orel. Tula Industrial Factory renders services in qualitative sharpening of industrial knives: knives guillotine knives for shredders, rotors, knives for crushers, agglomerators

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Professional sharpening of knives of any complexity and type of steel: kitchen, hunting, folding and hiking knives, as well as premium knives and unique. Restoring cutting edge, eliminating splinters. Change the angle of sharpening, repairing the tip of the knife. Sharpening is made on the professional equipment Profile K-03. Also I do grinding and polishing a knife, a knife in a mirror. Elimination of rust, scratches and abrasions. Price depends on complexity of work, geometry, and condition of the knife. Restoration and restoration of knives of any complexity is also possible (only the blade). Sharpening carefully, accurately and qualitatively. Working schedule 9-21 daily. When sharpening each 3rd knife discount. examples of work on Instagram zatochka_profil

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Making knives. Guillotine knives. We make knives for heavy and light industries. We sharpen knives of any metal and size up to 2500 mm. We carry out the product in a short time Low in the Moscow region. Discounts for loyal customers. We deliver products within Russia. Sharpening tools:. Industrial knives. Industrial knives. Metal cutting knives. Making industrial knives. Guillotine knives Wrapping knives, zigzag knives Vegetation knives and chisel knives Paper knives up to 2000 mm long Knives of shredders, crushers, agglomerators Gear knives, knives of packing lines Planer knives, knives of electrical planers and woodcutting machines. Complex profile knives. rotary crushers, shredders Knives for special equipment. Graders, bulldozers, ice picks. All products are made on modern equipment. We have three production sites. = We are able to process the following products: A) up to 7.000 kg! B) Knives up to 2.500 mm. B) Diameter up to 1.200 mm. Guarantee on products, provide certificates of metals. As well as all closing documents. Download drawings on email. Send us a message on watsapp / telegram. Call us on these numbers at any time. We are open to new partners.

Grinding of garden tools, chainsaws chains

Preparation for the gardening season requires qualitative treatment of tools. Garden shears, axes, lawn mower blades and other products will only help you in your work if they are all well sharpened. Sharpening.Bele” offers a complex of services on sharpening of garden tools in Minsk using modern equipment. Let’s bring the blade back to sharpness, take care of cleaning and dressing.

In the work are used corundum and abrasive stones, mechanical sharpening wheel, fine-grained beads, belts with special paste. Saws and similar tools are processed with files.

It is important to choose the right abrasive material. Different metals are compatible with different types of abrasives. we use natural (corundum, diamond, emery) and artificial (carborundum, silicon carbide) materials.

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Consider in detail the process of sharpening popular garden tools.

What kind of work we do?

We recommend sharpening them at least once a year. Before starting work, specialists disassemble the secateurs and clean the parts from debris. Then the cutting edges are sharpened. After that the tool is lubricated and assembled. Final stage. adjustment, so the device can be used with maximum comfort.

Service name Price, BYN
Resharpening (disassembly and reassembly) of the secateurs 8,00 to 10,00
Service name Price, BYN
Lawnmower blade sharpening from 15,00 to 20,00

It is advisable to sharpen the axe at least once a year. Our experts use mechanical sharpening wheels. Finishing will reduce physical strain during tool use.

If the sawing is slower, the bar is dragging to the side, and a lot of dust remains at the end of the process, be sure to bring your chainsaw chain for sharpening at bargain prices! If this is not done, there will be difficulties in the work of the chainsaw engine, which can lead to a breakdown of the expensive tool.

How to sharpen a lawn mower blade yourself

The blades of the blades of different lawnmowers are almost always made of stainless steel, but they still need to be sharpened periodically, though. And the main thing is to do it in such a way that the quality of the metal does not deteriorate. However, no special tools and skills are required for this, and any dacha farmer can easily cope with such a task!

sharpen, lawn, mower, blade

Why do you need to sharpen lawn mower blades??

Of course, cutting off excess lush green grass from your favorite lawn is quite feasible and a knife with blunted edges. But the grass as a result of such manipulations will begin to stratify (this stratification will go mainly in the longitudinal direction), gradually turning into a messy fringe. And after a few days it will be completely rotten, and it can even be sick for a few weeks. That’s why the cuts must always be neat and even. in this case they are tightened in just a few hours and allow you to maintain a spectacular lush green color of the lawn. And for them to be such, it is necessary to periodically sharpen the blades of used lawnmowers!

Before embarking on such an important activity, it is important to try to secure both yourself and the garden gadget as much as possible. Especially for petrol lawnmowers (electric mowers can easily be defused by unplugging them): First you have to unplug the spark plug and then you have to make sure there is no fuel leakage. This can be done in two ways. both by draining the tank, and by placing a rubber sealed membrane under the cap and blocking the fuel tap. Unless otherwise instructed in the manual the mower can only be turned in the direction of the handle. Before doing this the hose connected to the depositing gas outlet must be squeezed to avoid oil leaks.

Blades in different models of lawnmowers can have the most diverse configuration, but the threads on the bolts are always unscrewed the same way. counterclockwise. And to prevent possible rotation of the shaft, you can put under the knife block firmly pressed into the ground. And of course, in order not to mess up anything when installing the knife back, it is important to try to memorize or even sketch the position of the blades.

It is necessary to clean the removed knife from the hardened grass sap and from the dirt stuck on it. The easiest way to do it is to use a metal tapping block. Then the surface of the knife is examined for any distortions or bumps. If there are such, they are corrected by an ordinary hammer with a slightly rounded edge of the striker. As a rule, the knife starts to straighten from the edges of the curved area, gradually moving to the center of it. It also does not hurt to check and often unbent from the impact throwing blades, because if they bend at unequal angles, it will inevitably lead to a deterioration in air flow, resulting in the cut grass will simply not be properly mulched.

The next step is the removal of the descent. First get rid of the scraped chippings, displaying the edge of the blade at a uniform angle along the entire length of the cutting part. And to bring the descent to the required angle you can use small file or electric tool, equipped with a carborundum stone. it is important to try to remove the metal from the blade as evenly as possible. But the angle grinder for these purposes is categorically not recommended, because it can significantly reduce the quality of the sharpened blade.

For sharpening the blade usually use a flat emery bar, which grain size is in the range from 400 to 600 grits. Before you get down to sharpening the blade, it is advisable to soak the bar for about ten to fifteen minutes in soapy water. This should be repeated periodically during the sharpening process. And the blade should be sharpened by pulling the bar in the direction from the center of the area to be sharpened to the edge. It is desirable to keep the stone in one and the same position, as this will help to maintain a constant angle. And, of course, the blade of the knife should ideally grind the same amount of metal!

Sharpened blades must also be “corrected”. For this purpose, you will need a small piece of waterproof emery cloth, which grain size is in the range from 600 to 800 grits. The paper is moistened with water and rolled into a cylinder, the diameter of which reaches about 100. 150 millimeters, and only then proceed to “straightening. And before putting the blade back on the mower is important to make sure that the weight of his shoulders remained the same, otherwise (in the case of unbalance) can cause a highly undesirable vibration. To check the balance, first clamp a smooth bar horizontally in a vise, and then put a blade on it through the hole in the middle and try to set it horizontally too, watching its behavior. one arm should not visibly overtighten the other. If the balance is not observed, then from one of the shoulders to grind a little more metal. And only after that can the sharpened blade be reinstalled on the lawnmower!

necessary tools for sharpening

The first thing to pay attention to is how to remove the blade correctly. Lawnmower with a gasoline engine in any case can not be turned up the disc and the protective cover, as in the area of the carburetor gets oil and carbon residue left in the cylinders.

Turn the mower sideways, towards the control handles. If possible it is advisable not to do this either, but use a trestle. In extreme cases the lawn mower is simply placed on 2 stools and then the blade itself is removed. To do this, it must be blocked (e.g. with a crowbar or wooden beam) and alternately unscrew 2-3 bolts from the bottom. Be careful, because the washers will also come off.

After removing the blade, it should be carefully inspected for chips and burrs that occur when the mower hits a rock or other hard object. If there are any, these should be removed by grinding. The easiest way is to grind the entire edge. However, if you do this on one side of the blade, you will have to grind the same amount on the other side, regardless of whether there are chips there. This is all done because of proper balancing. Then begins the actual sharpening of lawn mower blades.

Straightening and sharpening of the cutting edge will be required:

  • angle grinder;
  • vise;
  • A drill with a sanding paper adapter (discs);
  • file;
  • emery cloth (emery cloth) of approx. 250 grit.

It is necessary to begin with alignment of a cutting edge (if you have not carried out its grinding). An angle grinder with grinding wheel or a stone with coarse grit (up to 400 grit) is suitable for this grinding.

The standard angle of sharpening is 30° (only one side is sharpened).

However, it is advisable to check this information in the instruction manual of the lawnmower. Some manufacturers place the edge on the mower blade at a 20-25° angle. This way more sharpness is achieved, but the permissible wear before resharpening is reduced.

Is it necessary to sharpen the knife after purchase??

Sharpening in the factory by means of a diamond conveyor disc. Nevertheless, it takes no more than 10 minutes to bring the blade back to its original sharpness. Unscrupulous manufacturers do not always carry out a quality straightening after the descent and the basic sharpening.

You can additionally sharpen the blades on the back side by running the cutter through the rotating sandpaper coiled into a cylinder and fixed in the drill chuck.

The blade is pressed against the emery board from the back, but there is little slant in the direction of the point. The purpose is to remove all the risks on the flank left after the main sharpening step.

Tool Preparation

Some manufacturers of mechanized lawnmowers do not recommend turning the tool upside down, so that the oil in the crankcase does not get into the piston. This problem can be solved in two ways:

Most tools can be tilted to the side of the handles for movement by first removing the grass collector. The space created is usually sufficient for cleaning and access to the knives. On electrified tools and trimmers with all types of drives the blades can be removed in any convenient position after cleaning. When removing the blades from any tool, necessary safety precautions must be taken to prevent unintentional starting. If the tool does not have a rotation lock feature, lock the shaft by any available means. You can use a piece of wood of the required size as a support for the knife.

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Removing the blades from the lawnmower

A good sharpening quality can be obtained by using an emery machine with a fixture for working at a certain angle.

Knives on many models are fixed by a bolt located in the center, with an additional washer or a special bracket. The bolt must be unscrewed with an open-end wrench or a 19 mm socket. If it is difficult to unscrew or if there is insufficient force, the bolt must be tapped with a hammer. The blows should be gentle, with a high frequency.

Several taps can be made. If after that the bolt can not be unscrewed, the connection should be sprinkled with brake fluid or Pepsi-cola. Leave it in this condition for several hours. Many experts confirm the ability of Pepsi-cola to facilitate the unscrewing of threaded products.

Use various levers and amplifiers should be extremely careful not to tear the head of the bolt or break the mechanism for fixing the shaft.

If you cannot remove the blades by yourself, contact a specialist or service shop. With slightly damaged blades and easy access you can try to sharpen them without removing the tool.

Where to sharpen a lawn mower blade

When the grass is simply plucked, knocked down, or cut with a blunt blade, its tops look like a loose cloth. This causes the green cover to turn yellow as the stalk tips dry out, and the plant itself withers and becomes diseased for a long time. But if the cut is made with a sharp object, this does not happen, therefore, it is quite natural to ask how to sharpen the lawnmower blade. In this article I will tell you how to do this maintenance properly and quickly.

Sharpening steps

Such devices for cutting grass are more convenient than trimmers at least by the fact that the factory blade will be enough until the end of the operating life of these devices, if the sharpening of lawn mower knives is made in time. This rule applies to both electric and gasoline (carburetor) units.

How to remove the blade

Despite the fact that the knives in different lawnmowers differ in the configuration of the blade and its length, the principle of the device remains the same. the knife is attached in the center on the shaft by a clamping nut with a washer. To get to the clamp, the machine simply needs to be put on its side, but it is not always so easy. That is, if you are dealing with an electric drive, you just have to pull the power cord out of the socket for maintenance, but if the engine is powered by liquid fuel, then the conditions change dramatically.

First of all, you will need to shut off the fuel tap and seal the tank lid with polyethylene to prevent gasoline from leaking. It is also possible to drain it into some clean container in order to use it again later. Some people advise to take off the candlestick in such a situation, but personally I don’t see the necessity.

Unscrew the nuts you certainly know how, but if there was a need to sharpen the blade of lawnmower after its long preservation, it may not be so easy. The fact is that the blades are made of ordinary steel and if the unit is left uncleaned from the grass, then in the place of fixation, most likely, rust has appeared, which penetrated the threads between the nut and the bolt. In such cases you should not hit the wrench with a hammer, it may play and hurt you when it comes off. Better yet, turn the machine upside down and pour an anti-rust agent like “Rust Relief” on the nut and leave it in that position for a few hours.

Note: I can responsibly say that such tools help 100%. This problem used to be solved with kerosene but it was much more time consuming.

Needed tools

In order to sharpen the lawn mower blade with your own hands without any problems, prepare the following tools:

  • angle grinder, an electric drill or a stationary machine with an abrasive wheel;
  • flat and semicircular file on metal (for manual sharpening);
  • vise;
  • Fine sandpaper or a turtle-type sanding disc.
sharpen, lawn, mower, blade

Note: it is possible that you will need something else, but it is unlikely. As a rule, additional needs are limited to consumables like grinding disks or fine sandpaper.

sharpening angle

To understand how to sharpen a lawn mower blade, you need to learn that the ideal sharpening angle should be 30°. Increasing this parameter will cause the knife not to cut, but to knock down the grass, and decreasing the angle equals a rapid dulling of the blade.

If you have never sharpened knives before (at least kitchen knives), you will have difficulty keeping the file or abrasive disk in one position relative to the blade. Here you can advise two things: firstly, stick to the old inclination, because you just need to grind about 0.5-1 mm of the knife to get to a sharp angle and, secondly, look at the picture above and try to put in the same position an angle grinder disc or a file. Muscle memory should work and remember the inclination.

Sharpening the chamfer

If you have at least a little experience in sharpening various cutting tools, you will most likely be able to produce a thirty-degree downward slope. As I mentioned above, here is where muscle memory kicks in, and a person is able to hold a tool or workpiece in a certain position. But, unfortunately, the hands can succumb to fatigue and the sharpener, without noticing, will deviate from the correct angle. over, the movements of the file or sanding disc can’t be strictly parallel to the knife’s descent. somewhere the tool or the blade itself will sway. Then, how to correctly sharpen a lawn mower blade, so that the angle was exactly 30 °?

To do this you can make a simple device, as shown in the top photo. a wooden guiding support in the form of a Latin letter V with the ends wide apart. For this you will need a piece of plywood, OSB, chipboard 8-10 mm thick or a scrap of board 20-25 mm thick. Make a rectangle out of it, approximately 100×200 mm (you can more or less) and on the upper side of any angle gauge (a school protractor will do) mark out the angle of 60°. But in doing so the vertical axis deviation should be 30° to each side.

If you sharpen the blade for a lawnmower will be carried out by the angle grinder, you should think about how to set her disc vertically and the easiest way. to clamp in a large vice or between two slats (boards) on the workbench. The letter V that you cut needs to be set strictly vertically, so make a stand of the same lumber and strengthen the joint with a metal corner (preferably on both sides). The rest is a process. Press the blade to be sharpened with its central flat part against one of the slopes and smoothly feed the blade to the abrasive disk. If necessary, this device can be fixed on a table or workbench with self-tapping screws, and then you are sure not to sabotage the angle.

Correct sharpening of the lawnmower blades involves two steps: angling and grinding. Consequently, you need to grind the blade, because there are burrs on it after the coarse or fine abrasive, which break when you hit the grass stalks and the knife blunts quickly. To prevent this from happening, burrs, which you can not even discern with the naked eye, you need to remove with sanding. For this purpose you can use a flexible disk under the angle grinder or belt sander, but a device for this purpose can also be made by yourself.

So, let’s make a simple device to grind already sharpened blades for lawnmowers. For this you will need a wooden bar with 50×50 mm cross section, 150-200 mm in length and sandpaper. The sanding paper is considered a paper with numbers from 180 to 400 (GOST R 52381-2005 ). the number of grains per square inch of the leaf. For comparison; according to Soviet GOST the classification was indicated by the abrasive fraction, so a smaller number indicates a smaller grit and so called “nulevka” was considered sandpaper M40, but now it is P400. But we won’t need zero grains. it’s not a razor, and you can use numbers from P200 to P250 in this case.

Services for sharpening knives

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