How to choose a lawn mower knife

Electric models

This is the name of the trimmer cutters. Actually, electric lawn mower knives are discs of the most diverse shapes, although there are options that are more interesting for an outside observer.

They are used in this way. they are inserted into the trimmer head, fixed, and then it’s a matter of technique and time.

choose, lawn, mower, knife

How Lawn Mower Blades Cut Grass (at 50,000 FRAMES PER SECOND) – Smarter Every Day 196

Such knives are made mainly of plastic. this is rather related to the safety of the user, since the metal disc can be thrown back, which cannot be allowed on braids with a curved bar. If your brushcutter is equipped with a straight bar, then you can use iron discs. They can be used to mow anything from grass to shrubs or even young trees. However, such units also have disadvantages. if you stumble upon a stone, the disk will simply flatten. This is not because the metal is of poor quality, but to protect the entire trimmer from breakage.

Which cutting tool can be replaced?

If you use various mechanical devices to care for the grass, you should know that not only a lawn mower knife can be used as a cutting tool, but also a trimmer line, or, as it is also called, a cord.

If the first conversation goes separately, then the second needs to be a little emphasis. Trimmer lines can vary in thickness as well as in shape. these are two important aspects to consider. In addition, there are still differences in materials. this is especially important for lines from Chinese manufacturers. However, it is better to buy exclusively European brands in general. your own safety is more important.

Utility knives

There is one more option for replacement. after all, it is quite difficult to look for a specific model. That is why universal lawn mower knives are firmly on the market. Their peculiarity is that they can be fixed in several ways, which makes work safe on many lawn mowers at once.

Also, such devices are usually completed with a whole set of washers and adapters, which allow them to be securely fixed on machines of most brands.

Brand name

Also keep in mind that all lawn mower manufacturers use customized cutting attachments. The safest for you will be a replacement for the same brand, or even model. For example, an Al-Ko lawn mower knife will only work for this brand, and so on.

If you make a mistake in your choice, then this will lead to only one thing. you will not be able to connect the knife to the apparatus. But if you succeed, things will only get worse. During operation, such a blade will be very unstable, since it will not attach at all as it should be. which means that the quality will become much worse than it should be. But these are only flowers. The berries will go when the blade flies out of the socket. and this may well happen, since the unreliable fastening plus fast turns. in general, physics will do everything as it needs to. Subsequently, either your lawnmower or yourself will be injured. A combined option is not excluded.

However, there are other possibilities besides buying exactly the same cutting mechanism as the one that was on your machine before. They will be discussed below.

Using adapters

It is used to connect the engine to the knife, and it performs the following functions: firstly, it makes it possible to use almost any blade with every engine that is produced in series. Does not damage the engine. if the loads exceed the permissible limit, the adapter, along with the cutting surface, will simply break off, thus protecting the motor. Sometimes it also acts as a wheel drive belt pulley.

Adapters can be very different, as each manufacturer needs its own mount. Despite this, finding the right one is not difficult. Even the largest brands have no more than a couple of dozen such devices in production. the rest, indicated as possible, are simply no longer produced, although they can be used.

How to choose a lawn mower knife?

Lawn care is a necessity that simply cannot be avoided. However, this is correct, since a beautiful lawn is the face of the owner of the house, which means that it shows you only from the best side. But do not forget that you need to take care not only of the grass, but also of the instrument itself. And here it is absolutely unimportant whether you are mowing the lawn with a brushcutter, a lawn mower, dissecting on a mini-tractor, or using the services of a modern robot. But what is really there, even the ancient braid needs sharpening! What to say about more modern devices.

Lawn mower knife

Choosing a cutting blade for a lawn mower depends on several factors.

Such data are usually indicated in the technical characteristics of the purchased machine. However, using a slightly shorter knife will not have dire consequences. Unless the process itself will take a little longer, and the missed sections will not be uncommon, but commonplace.

What you need to take care of first?

Of course, there are a lot of things that require your attention, but some of them are more important than others. The most important is the lawn mower knife. This attitude is justified, since with a blunt blade it is impossible to achieve a high-quality haircut.

If we talk about bent or damaged devices, then this can lead to a number of consequences, where one of the easiest is a complete breakdown of the device. Examples of the most dangerous results of such imprudence are cases of severe injuries during mowing.

Also, you should definitely check your engine from time to time. All work is based on it. So it is not worth neglecting technical inspection, even if time is sorely lacking.

If you are using a lawn mower, there are other problems as well. The petrol lawn mower blade can be placed on the same rung as the wheels. Such a base for movement plays an important role. if something breaks while driving, then subsequent damage can also touch the more fragile internal parts of the car.

How to issue a knife through the console in CS: GO, how to throw out and pick up a knife in CS: GO

Not many CS: GO players know, but the game can be played with some commercially available knives without buying them. over, you can not just run with them, but also drop them so that your friends can test them.

How to issue a knife

Initially, you will need to activate the cheats on the server.

To do this, enter the command sv_cheats 1 in the console

All you have to do is give yourself the necessary knife. To do this, however, you need to know its correct name, and for which I prepared a list of knives for you.

  • standard knife ct. give weapon_knife_ct
  • standard knife TT. give weapon_knife_t
  • bayonet knife. give weapon_bayonet
  • folding knife. give weapon_knife_flip
  • hook blade. give weapon_knife_gut
  • karambit. give weapon_knife_karambit
  • m9 bayonet. give weapon_knife_m9_bayonet
  • hunting knife. give weapon_knife_tactical
  • butterfly knife. give weapon_knife_butterfly
  • falchion knife. give weapon_knife_falchion
  • golden knife. give weapon_knifegg
  • bowie knife. give weapon_knife_survival_bowie
  • poke. give weapon_knife_push
  • bear knife. give weapon_knife_ursus
READ  How To Remove A Knife And Make A New For Your Lawn Mower

The command for giving yourself knives looks like this: “give weapon_knife_ct”, ie you will receive the standard counter-terrorist knife. Instead of “ct”. should be the name of the knife.

Take the bear knife, for example. To get it, you need to register the following:

And so. with any knife.

How to throw a knife

As you know, you can’t drop knives and stay bare-handed in CS: GO, at least on the official servers. But on your server. you are the king, which means that you can think of something with this. Or rather. that’s what.

Enter the command in the console: mp_drop_knife_enable 1

On the standard G button. you can drop your weapon. This is how it looks in the game:

As you can see, the hands of our model are empty, or rather, they are not visible at all, and there are several knives on the ground.

How to choose a knife

In order for everything to work as it should, and you can drop and take knives from the ground, you need to write in the console:

ent_fire weapon_knife addoutput “classname weapon_knifegg”

Prescribe commands, if necessary. have fun with friends and record videos, if necessary. test knives and “taste them”.

Good luck in choosing a worthy knife, as well as in attempts to stab someone with them =).

Phased execution

There is no need to look for a master to sharpen a lawn mower knife correctly. If you know how to handle manual and mechanical tools, then even without having the skills to sharpen knives and blades, but doing everything strictly according to the instructions, immediately learn how to sharpen cutters for mowers on your own.

Follow some steps to remove the knife.

  • Position the mower so that the bolt holding the blade is easily accessible to you.
  • To prevent the shaft from spinning, place a block of wood under the knife.
  • Try unscrewing the nut with a 19 mm wrench. Nut size may vary. On many mower models, the knife is fixed by means of a central bolt, and held by means of a spring washer with a nut.
  • If the nut does not turn away so as not to rip the edges of the bolt or wrench, saturate the threaded joint with oil or grease. Leave it like this for a few hours.
  • If there is not enough force on the wrench lever, hit with a hammer in the direction of unscrewing the nut. counterclockwise. In the vast majority of cases, the nut can be removed without problems.

The last two steps will save you the adapter that secures the motor or gear shaft to the knife. The spindle mower will not work without it. If the cutter still cannot be removed with your own hands, then contact the workshop.

In case of minor damage, the cutter is sharpened without removing.

Required inventory

To level the mower blade, you need the following tools:

  • Bulgarian;
  • hammer and anvil;
  • coarse sandpaper and whetstone (in the form of a bar) with a grain size of 200-1500 grit;
  • vice;
  • ruler;
  • a crowbar or wooden stick and a couple of stools;
  • drill with a head for grinding paper or sharpeners (discs).

This list is final. Some tools and fixtures may not be needed.

Sharpening the blades

Mower blades are sharpened with:

  • chisels, files and sandpaper;
  • grinders (using sanding discs);
  • with an electric drill or any motor with a special attachment on which a round whetstone is attached;
  • on an emery machine.

Make sure there are no dents, notches or dents on the knife blades. For high-quality sharpening, you will most likely need a vise. they will firmly fix the knife in a position ideal for quick sharpening. Small notches and gouges can be removed with a chisel or file or a coarse sharpener.

precise sharpening is carried out with a fine-grained sharpener or emery of zero or first grit.

Sharpening performance will increase when you use a drill with an adapter, on the chuck of which a sharpening stone or emery wheel is attached. Now plug in and run your drill or sharpener. Start sharpening the serrated edge of your knife.

When sharpening, you must adhere to certain rules.

  • Do not apply excessive force to the product, smoothly move the emery wheel.
  • Avoid friction overheating when sharpening.
  • Dampen the knife periodically with soapy water.
  • Keep the sharpening angle constant to avoid the sawing effect on the cutter. The unevenness of the point, its “pockmarked” line will lead to the formation of the smallest notches in the very first minutes of work.

You can attach a drill or sharpener, and move the knife along the edge of an emery or sharpening wheel.

Editing edges

Experienced craftsmen also grind a freshly sharpened knife.

  • Instead of a sharpening stone or emery wheel, install a felt wheel on the motor shaft.
  • Turn on the engine and apply a little GOI grinding paste to the wheel, lightly pressing a piece of the compound against the rotating wheel. Make it evenly layer on the circle.
  • Press the torch to be machined against the revolving wheel and move the sharpened point in any direction. Do not allow the point to turn towards the fibers of the circle (do not sharpen “against the grain”). this can spoil the circle itself, and provoke injury.
  • If the surface of the circle begins to blacken from the metal powder being removed, apply a little more paste on it and continue processing.

Do not overheat the knife. the material of the sharp edge will dull it, make the point uneven.

How to sharpen a lawn mower knife?

  • Required inventory
  • The ways
  • Angle selection
  • Phased execution
  • Do I need to sharpen a knife after purchase?

It is also possible to mow the mechanical slanting grass on the site with the help of a blunt knife. But rough cutting of the grass with a mower will spoil the appearance of the lawn: it will delaminate in the longitudinal direction. The resulting fringe will be an “callous” look for several weeks. To ensure that the lawn is completely level and completely level, it is recommended to check the mower blade at least once a month. and, if necessary, to undermine it.

Angle selection

The sharpening angle is just as important as keeping the center of the knife balanced. Ideally, it is 30 degrees. Too small an angle will turn the knife into a kind of razor blade, magnified tenfold and dull at the very first cutting of weeds or cutting bushes.

Too big. would rather hit and break plants than cut them.

Taking out descents

Blade slopes. the border zone between the base of the working part and the edge of the tip. As well as for kitchen knives that perform completely different functions, descents to the edge have their own normative spread of indicators.

Removing even and clear descents on a knife is half the success when restoring the original point.

On the mower blades, the predominantly “single slope” descent is used. Too “steep” descent (30-60 degrees). as well as too “gentle” (less than 30 degrees) will lead to a rapid blunting of the point, a rapid loss of its cutting properties. On the cross-section of the knife, the start of the cutting edge should not be crooked. Smooth descent, in contrast to the rounded, is much more resistant to dirt and easier to clean.

How to fix and replace?

The knife should be changed every quarter or during the growing season, although sometimes it should be changed sooner. Installing 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); petrol 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.
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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. After 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.

Brand name

Also keep in mind that all lawn mower manufacturers use customized cutting attachments. The safest for you will be a replacement for the same brand, or even model. For example, an Al-Ko lawn mower knife will only work for this brand, and so on.

If you make a mistake in your choice, then this will lead to only one thing. you will not be able to connect the knife to the apparatus. But if you succeed, things will only get worse. During operation, such a blade will be very unstable, since it will not attach at all as it should be. which means that the quality will become much worse than it should be. But these are only flowers. The berries will go when the blade flies out of the socket. and this may well happen, since the unreliable fastening plus fast turns. in general, physics will do everything as it needs to. Subsequently, either your lawnmower or yourself will be injured. A combined option is not excluded.

However, there are other possibilities besides buying exactly the same cutting mechanism as the one that was on your machine before. They will be discussed below.

As a conclusion

You should remember that you should buy any cutting mechanisms only in reliable places.

Before making a purchase, read the instructions and technical specifications of your lawn mower.

A knife is no less popular than a fishing line or cord, a working tool for a mower. If in the trimmer you can do with fishing line or cord, then the knife is basically a cutter for brushcutters, the power of which is noticeably greater than that of trimmers.

Electric models

This is the name of the trimmer cutters. Actually, electric lawn mower knives are discs of the most diverse shapes, although there are options that are more interesting for an outside observer.

They are used in this way. they are inserted into the trimmer head, fixed, and then it’s a matter of technique and time.

Such knives are made mainly of plastic. this is rather related to the safety of the user, since the metal disc can be thrown back, which cannot be allowed on braids with a curved bar. If your brushcutter is equipped with a straight bar, then you can use iron discs. They can be used to mow anything from grass to shrubs or even young trees. However, such units also have disadvantages. if you stumble upon a stone, the disk will simply flatten. This is not because the metal is of poor quality, but to protect the entire trimmer from breakage.

What you need to take care of first?

Of course, there are a lot of things that require your attention, but some of them are more important than others. The most important is the lawn mower knife. This attitude is justified, since with a blunt blade it is impossible to achieve a high-quality haircut.

If we talk about bent or damaged devices, then this can lead to a number of consequences, where one of the easiest is a complete breakdown of the device. Examples of the most dangerous results of such imprudence are cases of severe injuries during mowing.

Also, you should definitely check your engine from time to time. All work is based on it. So it is not worth neglecting technical inspection, even if time is sorely lacking.

If you are using a lawn mower, there are other problems as well. The petrol lawn mower blade can be placed on the same rung as the wheels. Such a base for movement plays an important role. if something breaks while driving, then subsequent damage can also touch the more fragile internal parts of the car.

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 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 match the teeth of the shaft. Matches according to the inner diameter of the central hole of the knife (for example, 22 mm).

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 of stainless steel, but there are also plastic knives. The fact is that when the cutter hits a large stone, the fragments 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.

Selection Tips

First of all, the knife must be strong and durable. The best material for knives is stainless steel of the correct thickness, 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.

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-point cutter. The optimum sharpening angle is approximately 30 degrees. You will quickly learn to recognize such knives.

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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 still 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 transporting or rolling the lawn mower to the place where the lawn mowing begins.

How to fix and replace?

The knife should be changed every quarter or during the growing season, although sometimes it should be changed sooner. Installing 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); petrol 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. After 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.

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.

Mower blade drastic difference and what is best for your yard and your mower. Oregon, Scag, Gravely,

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-point 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 transporting or rolling the lawn mower to the place where the lawn mowing begins.

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 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 match the teeth of the shaft. Matches according to the inner diameter of the central hole of the knife (for example, 22 mm).

Common breakdowns

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

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 knife hitting and breaking bushes more, tearing off the stalks of grass. rather than cutting off both. In addition, the point should be sharpened on one side. and only slightly, barely noticeably sharpened from the opposite.

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 of stainless steel, but there are also plastic knives. The fact is that when the cutter hits a large stone, the fragments 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.

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”.

Lawn mower knives: requirements, varieties, mounting features and selection

  • Purpose and requirements
  • Varieties and sizes
  • Blade and adapter shapes
  • What should be the sharpening angle?
  • How to fix and replace?
  • Popular manufacturers
  • Selection Tips
  • Common breakdowns
  • The mower does not cut the grass
  • The rotor with the knife does not spin in the mower

A knife is no less popular than a fishing line or cord, a working tool for a mower. If in the trimmer you can do with fishing line or cord, then the knife is basically a cutter for brushcutters, the power of which is noticeably greater than that of trimmers.