How to change a knife on a lawn mower

How to give out any knife in CS: GO. Butterfly knife, bayonet knife and others.

In the third cell of the available weapons in CS: GO, there is a knife by the standard, which is not bought and is given in each round. Without buying skins, the knife is also standard, but knife skins are expensive, sometimes even very expensive. However, there is a way to play with any of the available skins without paying a single dollar for it. How to give yourself any knife in CS: GO, we’ll tell you in this guide.

To give yourself a knife, you need to do several important steps. So, go to your server and turn on the cheat mode. This is done with the command sv_cheats 1.

The next step is to allow the knife to be thrown away, which usually cannot be done. To enable knife drop, write mp_drop_knife_enable 1 in the console. By the way, if you replace the number one with zero, it disables the action of these console commands.

change, knife, lawn, mower

We look at the table below and choose the knife we ​​need, but attention, we look at the continuation after the table.

How to Remove a mower blade. Technique and no special tools

Knife Console command for knife
Karambit give weapon_knife_karambit
Bayonet M9 give weapon_knife_m9_bayonet
Butterfly knife give weapon_knife_butterfly
Bayonet knife give weapon_bayonet
Jackknife give weapon_knife_flip
Hook blade give weapon_knife_gut;
Hunting knife give weapon_knife_tactical
Falchion give weapon_knife_falchion
Bowie knife give weapon_knife_survival_bowie
Bear knife give weapon_knife_ursus
Navaja give weapon_knife_gypsy_jackknife
Stylet give weapon_knife_stiletto
Claw give weapon_knife_widowmaker

The last step, we can throw the knife away (what do we do), we can give out any knife, but how to pick it up? To do this, you need to register the last console command ent_fire weapon_knife addoutput “classname weapon_knifegg”.

Done, now we can give out any knife and play with it. A significant disadvantage is that this method works only on your own servers, or on servers with cheats enabled. If some points are not clear, then we recommend a video to familiarize yourself with this topic.

How to easily check the balance of the knife

Balancing should be checked at least 2 times. Once before and after sharpening. First you need to fix some flat metal plate in a vice. The edge of the plate must be in a horizontal position. A knife is laid flat across this rib.

If the balance is not disturbed, the equilibrium of the rig will be achieved when the rib is in the center of the knife hole. If, for balance, the knife had to be shifted a little, then when sharpening, a little more metal should be removed from the side of the short overhang.

How to sharpen knives yourself in a lawn mower

As a rule, even dull knives in lawn mowers do their job. But under a sharp knife, the cuts turn out to be even and neat, while the blunt rig tears the grass, so the view of the lawn turns out to be imperfect. The sharpening process itself does not seem to be anything particularly difficult. This can be done on an electric grinder or by hand. The main problem here is balancing the cutting equipment. With a lawn mower shaft speed of almost 3000 rpm, even a slight imbalance leads to vibrations and increased bearing wear.

  • How to remove a knife
  • How to easily check the balance of the knife
  • Sharpening process
  • Re-balancing check and re-installing the blade

Sharpening process

The sharpening angle is approximately 30-50 °. The fastest and most convenient way to sharpen is electric emery. For manual work, you will need a flat file or an emery bar. If you are used to perfecting everything, then fine sandpaper is also useful for finishing sanding. But this is optional. The movement of the bar or file should be made from the thickening to the sharp edge and from the mounting hole of the knife to its edge. In some models of lawn mowers, the knife has a complicated shape, which makes it difficult to use a grinder. In this case, all the main work will have to be done manually.

The main thing to remember is balancing. This is especially true when working on an electric grinding machine, since it is easier to sort out with the removal of excess metal on it. In addition to files and machine tools, you can also use a drill or an angle grinder equipped with a special attachment with replaceable sandpaper wheels as a sharpening tool.

How to remove a knife

First, the mower has to be turned on its side. The cutting element is a bar with a sharpening on both sides of the rotating shaft.

The knife is attached to the shaft either with one bolt with a counter washer, or with one lock nut, which can be unscrewed without any problems with an ordinary open-end wrench. But if the corners on the edges of the nut or bolt have already been deformed, then you can use a gas wrench.

Re-balancing check and re-installing the blade

At the end of sharpening, the balancing is checked again. If necessary, additional metal removal is carried out only on the side of the shorter overhang. The procedure is repeated until the equilibrium of the knife is established with the edge of the auxiliary plate passing exactly through the center of the hole of the rig.

The knife is installed in the reverse order of its removal. That is, the knife is installed in place, the counter washer is inserted and the bolt is screwed in.

If you have an electric sharpening machine at hand, then all the work, including removal, sharpening and installation, will take no more than half an hour.

Do you have a lawn mower and a grinder?


In the first case, work is organized if the blades are in relatively good condition and are only slightly dull. Usually, this sharpening is used if the owner sharpens the cutting elements of his garden tools several times per season. If this is the case, then it will be quite enough to walk along the edges with a file and correct them.

During work, the curvature of the knife, roughness are removed. It is important to maintain the factory-cut angles and descent. Both sides (blades) are grinded evenly. The sharpener is kept in the same position. Imbalance must not be allowed, in which case the well-coordinated work of the blades cannot be achieved. Such a problem will lead to operational wear of assembly units (bearings).

After the main sharpening, it is necessary to edit the edges. This is done in order to remove the smallest breakages. It is best to use 800 grit sandpaper. Editing consists in slightly shifting the paper along the plane of the descents.

Read more:  What Oil To Fill In A Honda Lawnmower

Note! Instead of a file, you can use a sanding stone. Before the procedure, it is soaked in soap and water for a quarter of an hour. During operation, it is also allowed to slightly moisten the tool.

DIY lawn mower blade adapter

DIY MATRIX Turbo 50 lawn mower blade adapter. After destroying the unusual MATRIX knife adapter.

Rotary lawn mower blade sharpening

Rotary devices include:

Gasoline lawn mowers;
Electronic lawn mowers. wire and battery.

In their equipment, they use mainly two-bladed knives, less often a knife with 4 blades. The sharpening technique for all types is the same, and does not have any differences.

To complete the work you need:

Work gloves;
A spanner or end wrench of the corresponding size;
A set of ratfil, an abrasive bar, or an electronic sharpening tool.

Before you start sharpening the mower knife, you need to perform several preparatory operations:

Prepare the mower to remove the knife. In particular, this step should be taken into account by the owners of gasoline models of lawn mowers. It may be necessary to drain fuel, oil;


An independent process for partial disassembly of the vegetation shearing unit begins with preparatory work. It is necessary to observe safety measures and work with gloves. It is necessary to prepare a key in order to unscrew the mount, as well as a small plate that will help fix the knife. The electrical appliance is disconnected from the network. At gasoline, the fuel is drained and the spark plug is turned off to exclude the possibility of a sudden contact. Regardless of the type of machine, the owner must unscrew the grass catcher.

Important! Before turning the mower on its side or upside down, inspect it to ensure that there is no gasoline or oil leakage. It is best to drain the oil in the crankcase. Otherwise, if a leak occurs, it will be problematic to start the unit.

You can also not turn the mower, but simply place it on a frame or two chairs that simulate a lift. After that, the person approaches the device from below.

Preparing to remove the knife

The mower can be equipped with:

  • A single two-bladed knife of different shapes;
  • Two knives;
  • Blades with four blades;
  • Composite cutting structure.

In the first case, one knife is used in the form of a small strip. Its length will be the same as that indicated in the characteristics of the device under the heading width of cut. Usually it is 30-50 cm.

In the second case, two knives are used, which are attached at an angle of 180 degrees relative to each other.

On a note! Another option for the cutting system is the four-blade blades. They are connected to each other by a common base or not.

In the latter case, we are talking about several knives located at different heights. Such a nozzle in the form of an upper blade is equipped with modern models that have an additional function of mulching the lawn. Plants from the grass tank fall onto the upper blades. Sharp edges carefully crumble the greenery, which after the procedure covers the ground of the lawn and turns into mulch.

How to remove a knife from a lawn mower

Making the “Mowie” Knife (Part1: Lawnmower blade Bowie Knife)

Reasons for removing the knife

Common reasons for removing or replacing a cutting element are as follows:

  • The knife is dull;
  • The element is bent and deformed;
  • Chips and cracks are visible on the knife;
  • The blade has worn off and thinned.

When the knife is dull, bent or deformed, the lawn looks untidy after mowing. Competent sharpening will correct the situation.

Professionals advise to carry out the procedure once a year. It is better to do this in the spring, before starting work. If the cutting elements become blunt faster, then sharpen them more often.

Knife sharpener

If chips, cracks are visible on the blades, or it has sharply worn off and become thin, then replacement is necessary in this case. There is no point in sharpening such a tool. In addition, the blade can break at any time and fly out from under the machine body, injuring people or animals that are nearby. Such a device can also damage the engine. It is allowed to change an element to a similar model. The characteristics of the knife are indicated in the instructions.

Lawnmower knife functions

The lawn mower blade performs the function of mowing grass. Knives are made of high quality steel. The sharpening of the knife affects the performance of the work. The sharp tool cuts plants evenly. Blunt. leaves a fringe on them, that is, a cut of each blade of grass is cut perpendicular to the surface into several parts. This happens if you tear the grass with your hands. As a result, the cut of the grass cut neatly and evenly is delayed the very next day. Such a lawn looks attractive and bright. In the second case, the area in front of the house turns out to be a dirty green color. The dissected sections are tightened only after 10-18 days.

Lawn mower knife

Note! An additional function of the blade in the lawnmower is to create an air flow during rotation, through which the plants are transferred to the grass catcher. For this, the blades often have several special serifs.

Cleaning the knife before sharpening

Before sharpening the knife, clean it thoroughly. Plant sap and small particles of grass accumulate on the steel strips. In this case, the juice hardens over time and turns into a tough crust. It is not worth washing the blades, it is best to pick up a sharp metal scraper in the garage or use a brush.

It is not necessary to polish the cutting element of the machine to a shine, the main thing is to remove the adhering waste. After that, you need to improve the knife by straightening it and removing all the irregularities. Bumps arise from solid debris and stones hitting the blades. The correct option in this case is to work with a hammer. With the help of this tool and a flat work surface on which the knife is placed, it is possible to correct all local curvatures.

Cleaning the knife before sharpening

Experts advise to start leveling the blade from the edge, gradually moving towards the middle part. As a result, the steel strip should become as flat as possible. Only in this case will it be able to fulfill its function, creating an air flow that transports the grass to the tank for collecting plant residues.

Machine tool

The machine will help you get the job done quickly and without much effort. The main thing in this business is not to achieve too sharp edges. If you sharpen them as thin as a razor, then there is a great risk of chipping and breaking.

Sharpening on the machine

While working, it is important to keep the correct angle and remove the metal from the blades in the same amount. The machine does not eliminate the need to edit the edges with sandpaper.

How to remove a knife from a lawn mower

A lawn mower is a useful tool in the household, but the blades of the machine are easily dull. A simple solution to the problem would be an expensive repair in a service center, but it is much more profitable to learn how to sharpen a lawn mower knife with your own hands.

Sharpening a lawn mower knife from Lenfilm film studio

Editing edges

When the blades are sharpened, they need to be straightened. This is done using a piece of moisture-resistant sandpaper with a grain size of about 600-800 grit. The paper should be moistened with water and rolled into a cylinder with a diameter of 100-150 mm.

Read more:  How to Mow Grass Properly with a Manual Lawn Mower

Editing aims to remove the slightest burrs and flakes that can wrap around the thinnest edge of the blade. The sandpaper rolled into a cylinder should be lightly pressed against the descent plane and pulled out with a smooth movement from the grain. In this case, it is also recommended to make a smooth offset from the center to the edges.

When removing the triggers and sharpening, all manipulations were carried out with only one side of the blade. During the dressing process, the knife is also processed from the back side. Here the paper is pressed almost close to the body of the knife, but with a slight tilt towards the edge. The paper clamping force during dressing is very small, but a lot of movements need to be made, trying to eliminate large scratches on the brilliant escapement that remained after sharpening.

For reference: you can also sharpen a lawn mower knife with a rivet, by analogy with a conventional manual scythe. This, however, requires a special adaptation. grandmother, as well as a specific skill. But on the other hand, with this method of sharpening, you will not need to balance the knife.

Read the same

I always sharpen knives myself. the service centers are far away, and the sharpener is nearby. In the previous relatively low-power electronic mower, it was often necessary to sharpen, otherwise the edges of the grass were shaggy. The stronger petrol one was sharpened once a season. it is evident that it takes “pressure”. The first time it was very difficult to remove the knife. it sticks to something, but the spouse only from the third call of the special. unscrewed with a key. And on electronic I was controlled with pliers without problems.

I took a spare knife at the Lawnmower, but my husband took off the old one and sharpened it, worked with it for some time, secretly hoping that the mower would be unbalanced and I would buy the newest one. nothing noticeable came out, until now I use an old one, and she’s at least 4 years old. she’s already fed up.

To a certain extent, the danger of small imbalances is a myth. Look at the knife, the news of which is sticking to it so much, but not moderately. And nothing harmful happens.

But if you remove it and sharpen it on a sharpener, then you will definitely get an imbalance, the sharpener removes the metal shamelessly.

Personally, I either sharpen with a diamond ratfil (very good for tool steel and removes a minimum). How to remove a knife from a lawn mower knife can be sharpened with a rivet by analogy with the video. All. Or, if I launch a mini-drill like Dremel in very different words, it can also be sharpened very neatly. It is not necessary to completely sharpen the knife to the sharpness of the knife, the main thing is that there is an obvious angle, and not roundness.

What prevents you from checking the balance by putting the knife on the stick by the central hole. if it hangs evenly. in equilibrium, if one side pulls down. it is unbalanced and needs to be removed a little. Naturally, with this method, the knives are grinded faster. but it seems to me that buying a couple of spare ones and replacing them as they grind is economically more profitable than dragging each time to the service to the other end of the town and paying for sharpening (the only time I did this, they took 300 rubles from me, it was 5 years ago). How to install a 2-blade knife on a Stihl fs 55 lawn mower. Video instruction on how to change lawn mowers’ mowing heads from a reel (line) to a knife. You just need to calculate how much a knife costs and how much. a trip to the workshop.

And I don’t like sharpening with ratfil or a bar. it’s long and boring. it’s a real pity for the time. You can also meditate during other work. weeding, for example. IMHO

Vaska, I don’t sharpen knives either, but change them, but I’ll tell you about the imbalance. Putting a knife on a stick and aligning it, you will only get a static balance, dynamic in home criteria cannot be checked, but specifically it gives the most unfavorable consequences for the motor.

Rom165, I want to clarify. I just sharpen knives. but myself, with an electric sharpener. For the rest, I agree. they used the electronic mower for 6 years, and its body began to wear off (plastic). but it worked properly and was given “into good hands” after purchasing a gasoline mower in working order. how to reel the line for testing a lawn mower with a yakut knife function. Over the years, 2 knives were used alternately, and did not have time to grind off with a sharpener before discarding. And they mowed a lot. 12 acres of grass. There was an imbalance. there was not. I don’t know.

I report. our craftsmen sharpened a knife at work, checked for imbalance, gave it and said. use I watched intently as they sharpen, in order to sharpen the knives myself later. how to install a 2-blade knife on a Stihl fs 55 lawn mower. Video instruction on how to change the mowing heads of lawn mowers from a reel (line) to a knife. I know how to use an electric grinder. And it turned out to be so easy to sharpen knives that my wife and I will not even strain

Sharpening a lawn mower knife from Lenfilm studio

We tried our best. If you are not very happy, then take a look at our website. There we sorted out the “flights” in detail.

Cleaning and straightening

When the knife is removed, it must first be cleaned of adhering dirt and hardened herbal juice. The easiest way to do this is with a metal brush. The knife strip must be clean from all sides: not to a metallic sheen, but without the smallest adhering fragments.

Often, due to hard objects such as stones and chips falling into the working area, the blade deforms quite noticeably. Most blades are not straight by themselves, but the cutting edge and strip 10-15 cm away should be examined for local bumps and curvatures. This is done using a short, straight ruler.

You can straighten the blade with an ordinary hammer, with the edges of the striker slightly rounded. The knife is laid on a flat massive support (anvil), then the correct shape is given to the metal with weak blows. You need to edit the knife, starting from the edges of the curved section, gradually moving towards the center. A curved blade body is a minor issue, but it is very important that the cutting parts are straightened into one straight line. You also need to check the kickback blades, which often straighten from impact. If the blades on different arms of the knife are bent at different angles, this will impair the air flow and the cut grass will not mulch properly.

DIY lawn mower blade adapter

DIY MATRIX Turbo 50 lawn mower blade adapter. After destroying the unusual MATRIX knife adapter.

Selection Tips

First of all, the knife must be strong and durable. The best material for knives is stainless steel of the correct thickness, and not, for example, black steel with a spray of stainless steel or galvanized iron. Sometimes manufacturers indicate the grade of stainless steel, for example, AISI 304. The knife is not a part that is worth saving on.

Read more:  How to Get a Line From a Lawn Mower

For portable lawn mowers, the minimum solution is a two-knife blade. In other words, you should choose a knife with two cutting edges. He will cut the grass. but he will not chop it up. To mulch the grass, buy an eight-pointed cutter. The optimum sharpening angle is approximately 30 degrees. You will quickly learn to recognize such knives.

The thread of the rotor pins, on which the cutter is put on with its mounting holes, does not matter. Usually it is left, if the knife turns to the right. and vice versa. This helps to avoid loosening the nuts and the knife coming off at full speed.

If your choice nevertheless fell on plastic knives, look for unbreakable and rather hard plastic that retains the factory sharpness of the cutting edge longer. This one does not fly apart in crumbs from the slightest impact when carrying or rolling the lawn mower to the place where the grass starts mowing.

Common breakdowns

Most often, the malfunctions are as follows: the mower does not cut the grass or does not turn on at all.

Purpose and requirements

The purpose of the mower cutter is to cut the grass evenly and neatly in large quantities. In one session, when mowing one hundred square meters of a plot, you can collect tens of kilograms of grass. If the lawn mower has the function of shredding (mulching), such a knife should also chop the grass. The mower’s cutter is designed so that its blades create upward thrust for the grass that has just been cut. She carries this herb into the collector.

The best alloy for a mowing knife is stainless steel. over, it must have a hardness of at least 55 units on the Rockwell scale. A lower hardness value will quickly dull the cutter. especially when cutting weeds and trimming bushes. Since the cut grass contains not only moisture, but also other active components, ordinary steel would quickly become covered with a brown coating after the very first mowing session. Stainless steel, creating on its surface a chromium oxide that resists corrosion (chromium is also included in the list of alloying additives), does not allow the knife to rust.

Important! In addition to being tough, the cutter must also be strong. If, during work, he stumbles upon a stone, then it should not fly apart.

Popular manufacturers

Both lawn mowers and accessories for them, for example, knives, are produced by popular manufacturers, the best of which are the following:

  • Bosch;
  • Gardena;
  • Craftsman;
  • Champion;
  • Makita;
  • Hyundai;
  • Daewoo;
  • Honda;
  • “Bison”;
  • Interskol;
  • “Anchor”.

How to fix and replace?

The knife should be changed every quarter or during the growing season, although sometimes it should be changed sooner. The installation of the knife is as follows:

  • if the mower is in operation, suspend it; for electric braids, it is enough to turn off the power (cord from the outlet, disconnect the battery); lawn mowers are disconnected from the key, unused fuel is drained back into the canister;
  • turn the mower to one side and remove the grass catcher;
  • clean off the ground and grass adhering to the working parts from the knife and the protective visor;
  • remove the visor (protective cover) of the knife; it holds back the grass scattered in all directions (when mowing);
  • unscrew the mounting bolt using a wrench or a head, the knife should not turn, it itself is attached to the adapter; it is recommended to wear work gloves before removing the knife so as not to cut yourself;
  • insert a new (preferably exactly the same) knife and tighten the bolt tighter, when it is loosened, the machine vibrates, or the blade itself may fly off.

If vibrations appear, but there is no replacement knife, it is necessary to balance the old one. Remove the knife and check its balance by hanging it on a screwdriver or nail with a large head. For this, the working part of the screwdriver is threaded through the central hole of the cutter itself. If there is an imbalance. one particular point will tilt, in this case, grind off a little metal. With repeated sharpening, the mass of the point that outweighs the others will decrease, and the center of mass will shift to its place. When balancing is complete, reattach the adapter and tighten the modified torch. If the adapter has a key holding it on the motor (gearbox) shaft. do not forget to press it into place.

If you find a previously purchased replacement cutter, install it immediately. In some cases, the holder also wears out. it needs to be replaced.

Varieties and sizes

Too large a knife will “plant” the engine speed, which will lead to more wear on the latter.

Finally, the material of the cutter is critical in terms of safety. Most knives are made from stainless steel, but there are also plastic knives. The fact is that when the cutter hits a large stone, the debris of steel can hurt you with a ricochet. A blow from a plastic debris is much more harmless. unless it hits the eye. The plastic knife is the choice of owners of mowers with a curved flexible shaft. The utility knife for lawn mowers not only cuts grass and bushes, but also crumbles them. due to the larger number of blades (up to 8). Finely chopped grass will do as a top dressing (mulch) for the lawn.

What should be the sharpening angle?

Lawn mower cutters are always sharpened at a 30-degree angle. A smaller angle will make the blade too thin, like a razor rapier. it will quickly serrate, bend, it can only mow short grass. Weeds and bushes are guaranteed to “ruffle” the edge. Too large an angle will lead to the fact that the knife will hit and break bushes more, tear the stalks of grass. than cut off both. In addition, the point should be sharpened on one side. and only slightly, barely noticeably sharpened from the opposite.

Blade and adapter shapes

If it is a simple blade cutter, then there can be several blades. but no more than 8. The shape of the blades of such knives can be as follows:

  • simple (in the form of rectangular ends);
  • rounded (extreme edges have a smooth curvature);
  • pointed (in the form of a wide dihedral bayonet).

Bladeless knives. a cutter that resembles a circular saw for wood. These knives are also called disc knives. The number of teeth is up to tens. They vaguely resemble a bicycle sprocket, the teeth of which have been sharply sharpened and changed the direction of the cut. There is a special type of cutter, in which the cutting part is not star-shaped, but stepped. It resembles rounded and curved steps, also evenly spaced. Their sheer parts are sharply sharpened. The height of the teeth or “steps” reaches several tens of millimeters.

The adapter is a two-blade knife adapter that fits onto the motor shaft. From the side of the knife, it has retaining rods threaded through the holes of the cutter itself. The whole structure is tightened with a central bolt. Simply put, an adapter is a knife holder. On the reverse side, it has toothed grooves that coincide with the teeth of the shaft. Matches according to the inner diameter of the central hole of the knife (for example, 22 mm).