How to make a chainsaw work silently video

A chainsaw is one of the common tools used for cutting trees and large shrubs. And if there are ways to protect your eyes and face from small flying chips, then what to do with your ears? A running chainsaw is very loud and can damage your ears even if used briefly. Especially if it is a gas chainsaw. To help you work more safely with this tool, we suggest you make your own chainsaw muffler using the guide we provide below.

How to make a chainsaw silent with your own hands: we describe it point by point

Good day, dear readers and subscribers of Andrey Noak’s Blog. Here, recently, my neighbor in the country was cutting down trees on his property and preparing firewood. Naturally I used a chainsaw. Although he purchased not a professional saw, but a household one, it made a lot of noise. While he was working, all the neighbors, including me, were tired of this noise. That’s when the idea came to me, to tell him how to make a muffler for a chainsaw with your own hands.

Why does a chainsaw make noise?

All chainsaws have only one significant drawback - noise during operation, which in some places (dachas, garden plots) bothers and irritates many people. If the noise from a running saw makes it difficult to concentrate, then another option is headphones that suppress the noise. But everyone around you won’t wear headphones while someone else is making noise.

A clogged or improperly repaired muffler is the reason why the engine constantly stalls or does not start at all.

It happens that a chainsaw works normally at low speeds, but as soon as you add gas, it immediately sneezes and stalls. The reason, as a rule, is that the exhaust cannot pass through the muffler clogged with smoke and is forced to move in the opposite direction. To do this, it is enough to remove it and clean it, if of course it is disassembled, if not, then you will have to dry it with hot air using a hairdryer.

The main reason for muffler contamination is an excess amount of oil, which is diluted with gasoline and, as a result, settles on its walls.

If you decide to clean a non-removable muffler yourself, keep in mind that you cannot do it dry using the same hair dryer, since hazardous substances are extremely harmful to health.

Although most chainsaw manufacturers try to muffle engine noise as much as possible, this does not lead to anything good and primarily affects the power of the device.

Professional chainsaws, for example Husqvarna, cannot work quietly at all, since the power and speed are very high, which leads to a lot of noise. Trying to muffle the roar of the engine on your own while maintaining high performance is extremely difficult. But there are people who use an ordinary bucket of water and a plastic tube, lower one end into the water, and screw the other end to the exhaust pipe. Such actions are effective; the sound of the engine becomes quieter.

Check the ignition coil on a chainsaw

If preliminary actions did not help in identifying the cause of the chainsaw malfunction, then it is necessary to check the ignition coil of the saw. Diagnostics is performed in several stages:

Measure the coil resistance using a multimeter. To do this, you should know the optimal parameters, which are indicated in the operating instructions. However, due to the use of semiconductor elements in the system, if you try to “ring” the coil, the result will be an “Open Circuit” reading. This is fine. A sign of a malfunction is a positive test result. That is, if it was possible to determine the resistance of the coil using a special tool, then it is definitely faulty.
Check for spark with a special device. This device should be installed in the open circuit located between the spark plug and the high-voltage terminal of the saw's ignition coil. The indicators will be visible on the display. This verification method is more often used in service centers, since the device required for this is expensive, and the costs will not be comparable to the benefits provided.
Testing the coil using a spark plug, i.e. perform a homemade ignition. To do this, you need to unscrew it, and then attach the body to the cylinder. Now you need to pull the starter and watch for a spark. But this method only gives an approximate result, since the flywheel spins faster due to the unnatural position of the spark plug.

If none of these methods work, or if you need to check in the field, you can proceed as follows:

Remove the cap from the candle, insert a nail without a head into the core at a distance of 6-7 mm from the cylinder. This must be done as carefully as possible so as not to damage the part.
Perform the steps required to wind the tool. Now you need to look at the presence of a spark and its color. If there is no malfunction, the spark will be strong and the color will be bright blue.

This method can be used as a last resort and only if there are no electronic components, but it is important to follow the rules:

Do not completely unscrew the spark plug, as this may cause the flywheel to rotate faster, which is not the correct engine operating mode;
it must be located at a distance that corresponds to the compression model and dielectric properties of the fuel mixture, so this parameter can be found in the instructions (the value of 6-7 mm is average).

Why do you need a muffler?

This is a special device, thanks to which the noise from a running engine becomes an order of magnitude lower, but does not muffle it completely and this does not suit many people.

Of course, saws are now sold in which the muffler is capable of suppressing noise several times, but this immediately affects the operation of the saw.

Therefore, if you want to make the engine even quieter than what is provided by the factory, then you should try installing an additional muffler by making it yourself.

If you are smart, the same Ural saw can be made to work much quieter and this will not affect its performance in any way.

The walk-behind tractor shoots into the muffler: what to do?

The owner of such useful and multifunctional equipment needs to know that interruptions in the operation of the muffler can occur due to:

thin and low-quality metal;
frequent potholes;
excessive loads;
difficult work;
fastenings of an ill-conceived plan.

Important Design and operating principles of the MAZ clutch mechanism

Often the cause of popping noises in the muffler are gaps in the process of supplying sparks and spark plugs. To get rid of the problem, you need to unscrew the spark plug, combine its body and mass, turning the crankshaft using the existing starting handle.

At the same time, you should pay attention to whether a spark appears. If even after these manipulations the situation does not change, it is advisable to thoroughly clean the spark plug

Muffler for STIHL chainsaw

The video shows the work of a calm with a homemade muffler, which actually reduces engine noise by more than 50% of the order.

How to make a homemade muffler. The operation of the engine is judged by the noise of the gases, and it went when 2 years ago I made a copy of the Yak-50, and the goal was not to get a quiet one. They made the auger 20 revolutions and put it in the muffler pipe. The sound did not become quieter, but only changed. Roared on one note, on the letter: Sh-Sh-Sh-Sh-Sh-Sh-Sh! Electric saws probably don’t roll, because... We’ve already bought a bunch of chainsaws, but it’s also expensive to buy an electric one. Bosch AKE 30 LI cordless chainsaw. Quiet muffler for chainsaw. How to make a chainsaw » similar videos how to make. Somehow it turned out that the saw was not so expensive on sale. Cordless chain saw CTS CS from OREGON. Silent operation without soot and wires. How to make a silencer for a 2-stroke engine with their own hands. Construction, repairs with your own hands. How to make a chainsaw work silently. Repairing a chainsaw with your own hands A chainsaw, even if one wants to, cannot be classified as a complex device. Nevertheless, repairing a chainsaw can take a lot of time. The “grinder” attachment on a chainsaw performs such operations as cutting metal and stone, grinding the surface, and others. While a dedicated engine is very expensive, a boat engine made from a chainsaw is an excellent budget solution. How to start a chainsaw - a couple of the most popular methods. Disassembling the PARTNER 352 chainsaw. Airplane made from a chainsaw. Test chainsaw muffler. How to make a band saw PART - 1. That’s where the idea came to me, to tell him how to make a muffler for a chainsaw with your own hands. If you are smart, the same Ural saw can be made to work much quieter and this will not affect its performance in any way. There is an idea - to adapt a muffler from a moped to a chainsaw. What do you think? Has anyone done this? Once I had to quietly kill a couple of oak trees. It took a long time with two handles, so we decided to modernize the calm. Homemade muffler for chainsaw. Video; market make a chainsaw quieter make it quieter like an air compressor hose with. Loaded. I use the chainsaw as a boat engine and therefore turned it off. In this video I will show how to simply upgrade a chainsaw, make it safe for hellish pranks. How to make a chainsaw as quiet as possible, and at the same time the loss of power is up to 15-20? So that trees can be felled without burning at night. It will be environmentally friendly, quiet and healthy! In my opinion, if your soul can’t stand the exhaust, there are two options: take a break and eat a Twix or switch to electric. Others: how to make a silent muffler for a chainsaw yourself, homemade products for a car with your own hands, a flame arrester instead of a catalyst for a Ford, a metal mesh in the forward flow, removing the catalyst for a VAZ 2114, a resonator for a Ford explorer 1991 How to make a chainsaw from To make such a saw, you will need: Lemonade Shikhan , rope, lighter, awl, stationery. knife. like How to make the exhaust quieter at idle so as not to disturb the neighbors) AstalavistA inD 3 year. make a chainsaw quieter - photo - Mastergrad Forum. Do-it-yourself quiet exhaust of VAZ 2109 - Raum Profi. How to make a quiet muffler for a chainsaw video - Mosstroyservice. Silent? How to make a chainsaw » similar videos on how to make a chainsaw. But how to make it yourself? How to make the exhaust quieter on a chainsaw? What can be done to make it work more quietly? Therefore, manufacturers around the world are creating more and more models with high power and light weight. Let's talk further in this article about how to make a muffler for a chainsaw. And what to do if you need a powerful and at the same time quiet model for working on a personal plot or when building a log house?

What can be made from a chainsaw: basic accessories for chainsaws that have gained popularity

If you purchase special attachments for the tool, it will be extremely easy to install them; you won’t need to modify anything or disassemble the tool body. All ready-made accessories are designed specifically for installation on a chainsaw. Another important advantage of purchasing a chainsaw is its autonomy. This is explained by the fact that all electrical devices require a 220 V outlet. Using a chainsaw, you will be able to use homemade products in the field, be it a drill, an ice drill or a wood cutter.

A self-installed grinder attachment on a chainsaw allows you to use the equipment not only as a gas cutter, but also as an angle grinder. The nozzle is connected to the device via a special pin, and begins to rotate using a belt from a pulley attached to the drive sprocket shaft. Thus, the device is installed instead of the saw bar

It is important to choose the correct diameter of the nozzle circle; to do this, you must first study the instructions for the Druzhba chainsaw or other equipment used to make a useful device

Note! Experts warn that it is not possible to install an adapter in all models to fit the bases. The cutter is one of the most popular chainsaw attachments. Another popular attachment among users is a corroder, used for cutting bark from trees.

The attachment is also popular among woodworkers because it can be used to easily remove bark, knots and growths from untreated wood. Some use a nozzle to create longitudinal or transverse grooves on the beam

Another common attachment among users is a corroder, used for cutting bark from trees. The attachment is also popular among woodworkers because it can be used to easily remove bark, knots and growths from untreated wood. Some people use a nozzle to create longitudinal or transverse grooves on the beam.

Important Model range of petrol and electric garden trimmers Shtil

There are mainly two types of coders:

Drums. The main area of application is bark removal, the second name is decanter.
Disk. Used to create various types of recesses.

There are several nozzles on sale that differ in grip width, most often 80 and 100 mm. If the knives become dull, there is the possibility of secondary sharpening. If the knives are completely out of order, it is better to purchase a new set from the manufacturer. The attachment itself is a cutter or drum mounted in a bearing assembly. Actuation is carried out by a belt drive, and the rotation speed is regulated by the force of pressing the accelerator handle. The diameter of the pulley also affects the speed: the larger it is, the higher the speed. Studs for installing the nozzle are included in the kit.

Do it yourself

In order to save money and time spent searching for the right workshops, I advise you to make a muffler at home. It's not as difficult as it seems at first glance.

All you need is a regular 1mm stainless steel sheet, an iron tube with a smaller diameter than the muffler, stainless steel wool, basalt fiber and a little patience.

We take a sheet of steel and wrap it around the rollers, in the end we get a round tube, but you will definitely need an oval-shaped pipe. To do this, use welding to heat and then press down the tube, you should get an oval shape;
If you have a ready-made pipe of a suitable diameter, then this is good, if not, then you need to make it using a welding machine. To do this, take a metal sheet, mark the required dimensions and cut it by welding. Then we make a pipe, the seam should be thin and without bumps;
When you have a finished pipe, you need to make as many holes in it as possible, and you can make holes either chaotically or in a strict order, it doesn’t matter at all;
Next, we take the stainless steel prepared in advance and begin to wrap the outside of the pipe. This is necessary to prevent the muffler casing from blowing out;
Then we wrap basalt fiber over the stainless wool (this is the most suitable material) and so that it all does not slip, we fasten it with wire, which should be thin and at the same time strong;
We insert the wrapped pipe into the future apparatus and rub it all down with sandpaper, paying special attention to the seams and joints so that they do not stick out too much;
When you have done all this, the resulting unit must be attached to the chainsaw as tightly as possible so that it does not fly off at the right moment.

Such a homemade device, if done correctly, will serve for a long time and will significantly reduce engine noise; it works well on Druzhba chainsaws. Another advantage of a homemade muffler is that it will cost you a meager amount. It will only cost you time, but it's worth it.

You can also use this version of the muffler: install partitions in the pipe, which is located in the muffler, and thereby reduce the noise level of the engine. This is explained by the fact that the noise itself is a strong vibration of air, which comes out of the muffler at great speed.

In order to reduce operating noise, it is enough just to drill holes in the pipe and insert partitions into them at equal distances. There will be many divisions and the gas will gradually come out, while the pressure and noise will decrease. Accordingly, the speed of gas movement will decrease, which will lead to a decrease in noise.

If you want to make the gases leave the cylinders faster, thereby reducing the engine effort so that the saw’s performance increases, remember that the noise will be several times greater.

In order to achieve this, you need a direct-flow muffler, which can be made from a pipe according to the sketches of an old muffler, unscrewing and subsequently using all the bolts and nuts.

I advise you to choose a steel pipe, then the muffler will last longer. If there is no suitable steel pipe, then you need to make one using a steel sheet. Using a welding machine, you can make a tube of the desired diameter and size.

Everything is already provided by the factory, everything should work as one whole, and if you try to change anything yourself, including improving the muffler, without any drawings, then it is quite difficult and not everyone can succeed.

At best, the power will be lost, and at worst, the chainsaw will stop starting.

For chainsaws such as Shtil 180, it is better to buy a native muffler, which you can change yourself without any problems.

Therefore, if you have certain knowledge and good ingenuity, then you should try to make an additional muffler yourself, thereby saving money and perhaps you will be able to make a device that will actually make the chainsaw work much quieter and you will not have to constantly quarrel with neighbors or others you people.

User manual

When working with the Friendship saw, you must follow the operating rules:

Start-up and operation is prohibited with a damaged or removed air filter;
the instrument is held with two hands;
To protect the operator, special clothing and glasses are used;
at the moment of starting, the saw chain should not touch the ground, stones or other objects;
It is not allowed to saw wood without filling the tank with oil;
It is strictly forbidden to refuel the saw with pure gasoline;
when operating the saw for a long time, it is necessary to take breaks to cool the motor (every 40-45 minutes);
The tightness of threaded connections is periodically checked;
If parts of the saw are damaged, operation of the tool is suspended.

Before using the saw, you should read the instructions from the manufacturer. To make a fuel mixture, you need to prepare gasoline and special oil. Half the volume of prepared gasoline is poured into a clean container, then lubricating fluid is added and mixed thoroughly. Then the remaining gasoline is poured into the mixture, the solution is further mixed and filled into the tank. When running in the engine (after replacing the rings), it is recommended to introduce additional oil to ensure the running-in of the rubbing surfaces.

When felling wood, a cut is first made, located on the side where the trunk should fall. Then the trunk is sawed on the other side; There should be no unauthorized persons within a radius of 50 m from the tree being cut down. The operator moves from trunk to trunk with the saw running at idle speed (without chain rotation) or with the engine off. The operating instructions do not allow sawing of trunks tied into logs or stacked.

During operation, it is necessary to adjust the engine idle speed and adjust the carburetor to achieve maximum power. The equipment requires adjustment of the clutch, which overheats during prolonged operation and loses its original characteristics. Since the saw chain stretches during operation, it is necessary to adjust the tension of the element. A correctly tensioned chain moves along the bar by hand and has no sagging in the lower branch.

How to make a chainsaw silent with your own hands

The question of how to make a chainsaw silent with your own hands is asked by almost every owner of a private house or summer cottage. A tool at high speeds creates a loud noise that travels hundreds of meters. Loud sounds irritate the neighbors, and the master himself gets tired of them. By understanding the nature of this phenomenon, you can make the chainsaw quieter, spending a minimum of time and money. The noise occurs when gasoline explodes in the cylinders and when exhaust gases come into contact with air. Partial elimination of these factors leads to noise reduction.

Which to choose

The direct-flow muffling system can be attached directly to the factory saw muffling element. The noise is noticeably reduced: sound damping ensures a narrowing into the funnel of the internal cross-section. However, being large, the structure can prevent free operation.

A threaded muffler for a chainsaw is also attached to the original one. It is small, has an inlet tube with holes that are separated by a helical partition. The exhaust gases entering the pipe exit through holes whose diameters are not the same. This ensures fragmentation of the exhaust force and dampening of sound.

In two-stroke engines, and most chainsaws are equipped with such, the silencer is part of the engine, since a certain portion of the working mixture, after being dumped, again enters the cylinder. Therefore, it must be taken into account that any intervention into the mechanism in order to make operation quieter creates the risk of overheating the system or reducing its power.

Required materials and tools

In standard cutting products, the exhaust system is made as short as possible. This decision is made to achieve the power required to quickly rotate the chain. In order not to degrade the performance characteristics of equipment and to make it quieter, a thoughtful and comprehensive approach is required.

Making a muffler for a chainsaw with your own hands requires the following tools:

roulette;
welding machine;
metal scissors;
Bulgarian;
hammer;
core;
marker;
riveter;
file;
electric drill;
construction hair dryer;
screwdrivers.

Depending on the specifics of the improvements being made, the following materials may be required:

sheet stainless steel;
rivets;
bolts;
screws;
basalt fireproof cord;
wire;
solid wood for rollers.

To protect your hands, skin, eyesight and breathing, you should use the following means during work:

respirator;
thick clothes;
assembly gloves;
glasses;
construction helmet.

The design of the instrument provides for partial absorption of noise by the body. If there are large gaps in it, they can be sealed with silicone-based mastic. The material will reduce vibration, rattling of plastic and metal.

Product reserve

Electric trimmer FSE 81 AutoCut C6-2 is a fairly powerful tool with a soft anti-vibration handle, electronic speed control and motor overload protection. The device is ideal for homeowners with large lawn areas. The device is used for lawn care and mowing grass thickets in small areas, cutting near curbs and clearing areas around trees, near paths and stairs. The 1000 W electric motor successfully replaces the gasoline engine and overall the result is a well-balanced tool. A flexible shaft is used to drive the mowing head. The loop handle is height adjustable to ensure user comfort. The unit is characterized by low noise level and environmental friendliness.

Features and benefits of FSE 81:

Power
Soft anti-vibration handle
Electronic speed control
Motor overload protection
Flexible shaft
Height-adjustable loop handle
Convenience and comfort
Low noise level
Environmental friendliness
AutoCut C mowing head
Support wheel

Equipment

The circular handle of brush cutters and brush cutters is needed for working in tight spaces, for example, when mowing between bushes (see illustration).

For your safety, safety glasses are included as standard. They are well ventilated and have wide side protection (see illustration).

The soft handle absorbs some of the vibration and is extremely comfortable to grip.

This strain relief device for the network cable prevents the plug connector from being accidentally disconnected when the cable is pulled.

The support wheel protects tree bark and plants because the cutting thread does not extend beyond the adjustable wheel.

If you find an error or inaccuracy in the text or product description, highlight it and press Shift+Enter.

Build process

There are several directions for upgrading a chainsaw with your own hands. With the right approach, a homemade exhaust system will operate effectively without reducing the power of the unit.

The easiest way to get rid of the noise is to use a flexible plastic duct and a container of water. The hose is screwed to the exhaust pipe through heat-insulating gaskets, its other end is lowered into the water and rigidly fixed to the tank.

Gradually cooling and losing speed, the exhaust leaves the engine freely. Contact with air is neutralized by water. To make a similar muffler for a chainsaw, you will need at least 3 m of flexible pipes and a bucket with a capacity of 10-12 liters. This design is suitable for working on a flat, open place without moving around the area. Used for cutting firewood or timber in the courtyard of the house.

Alternative electrical circuit for electronic ignition for chainsaws.

The easiest to assemble and seemingly intricate and complex circuit will be the circuit that represents the electronic ignition unit of the chainsaw.

This scheme appeared after frequent requests to us for help in repairing chainsaws that had lost the spark discharge on the spark plug produced by the standard electronic unit.

The main reason for the electronic ignition unit to be out of working order is a break in the high-voltage wire or a large gap on the spark plug. Additional negative factors are moisture, damp dust covering the block and, in fact, the use of spark plugs that do not meet the operating and electrical parameters.

We redesigned the standard units to install the most affordable domestic parts on them, which reduces the cost of repairing the unit.

How to make a muffler for a chainsaw at home

How to reduce the sound of the Friendship chainsaw? | Topic author: Vasily

I want to put this item on a bicycle, how can I reduce its “rumble”, i.e. how can I make a muffler for it? Is it possible to make this engine quiet?

Marina Don't start it.

Nikolay Put on your headphones.

Irina Improve the muffler. Or as in the joke. A man comes to the TV shop and says the TV needs to be repaired. What's wrong with the TV? I was sitting last night watching TV and picking at my ear with a screwdriver. Then something cracked and the sound disappeared.

Gennady Look for the muffler for the bike motor... Add it on.

But the power will decrease.

Ruslan, reducing the exhaust volume, strengthening the muffler, you will lose power.

Zhanna a customer comes to the store to return an item - a chainsaw. - what are the complaints? - yes, in the instructions it says that it cuts 4 cubes of firewood in an hour, but I can’t do more than 3 - let’s check in a minute Peter - wow, why is it whirring for you?

Why does a chainsaw make noise?

A clogged or improperly repaired muffler is the reason why the engine constantly stalls or does not start at all.

The main reason for muffler contamination is an excess amount of oil, which is diluted with gasoline and, as a result, settles on its walls.

If you decide to clean a non-removable muffler yourself, keep in mind that you cannot do it dry using the same hair dryer, since hazardous substances are extremely harmful to health.

Although most chainsaw manufacturers try to muffle engine noise as much as possible, this does not lead to anything good and primarily affects the power of the device.

Fuel system malfunctions

The main sign of a malfunction in the Shtilev fuel system is that no fuel is supplied to the engine cylinder. Most likely, the problem is in the fuel hose or the condition of the membrane. If they are intact and there is no blockage downwards, the reasons should be sought in a clogged breather or special filter.

If the fuel is supplied by spitting, the stream is weak, most likely the breather is clogged. It must be carefully cleaned with a sharp nail or needle.

In rare cases, fuel does not enter the cylinder correctly due to clogged carburetor passages. It also needs to be cleaned mechanically with a thin screwdriver or wood chips.

Why do you need a muffler?

This is a special device, thanks to which the noise from a running engine becomes an order of magnitude lower, but does not muffle it completely and this does not suit many people.

Of course, saws are now sold in which the muffler is capable of suppressing noise several times, but this immediately affects the operation of the saw.

Therefore, if you want to make the engine even quieter than what is provided by the factory, then you should try installing an additional muffler by making it yourself.

If you are smart, the same Ural saw can be made to work much quieter and this will not affect its performance in any way.

Possible inconveniences associated with a quiet muffler

The car will now be quieter, which is what we wanted to achieve, but there may be some disadvantages - an increase in the overall weight of the exhaust system. Therefore, it is necessary to hang stronger brackets so that the exhaust pipe does not come off on rough roads. There are also cases when rubber shock absorbers are hung. But in fact, a homemade resonator will weigh about 2-3 kg.

It is also necessary to test in action how the exhaust system works so that gases exit normally through the exhaust pipe. Therefore, it is necessary to check at higher speeds, then it will be possible to draw the right conclusions. But as a rule, gases will escape through such a resonator without difficulty.

And then in the video there is another way to reduce the sound of the muffler, making a really very quiet exhaust system:

Important TOP 2 models of Hitachi front loaders and their technical characteristics

Do it yourself

In order to save money and time spent searching for the right workshops, I advise you to make a muffler at home. It's not as difficult as it seems at first glance.

All you need is a regular 1mm stainless steel sheet, an iron tube with a smaller diameter than the muffler, stainless steel wool, basalt fiber and a little patience.

We take a sheet of steel and wrap it around the rollers, in the end we get a round tube, but you will definitely need an oval-shaped pipe. To do this, use welding to heat and then press down the tube, you should get an oval shape;
If you have a ready-made pipe of a suitable diameter, then this is good, if not, then you need to make it using a welding machine. To do this, take a metal sheet, mark the required dimensions and cut it by welding. Then we make a pipe, the seam should be thin and without bumps;
When you have a finished pipe, you need to make as many holes in it as possible, and you can make holes either chaotically or in a strict order, it doesn’t matter at all;
Next, we take the stainless steel prepared in advance and begin to wrap the outside of the pipe. This is necessary to prevent the muffler casing from blowing out;
Then we wrap basalt fiber over the stainless wool (this is the most suitable material) and so that it all does not slip, we fasten it with wire, which should be thin and at the same time strong;
We insert the wrapped pipe into the future apparatus and rub it all down with sandpaper, paying special attention to the seams and joints so that they do not stick out too much;
When you have done all this, the resulting unit must be attached to the chainsaw as tightly as possible so that it does not fly off at the right moment.