How to unscrew a drill without a key

Greetings all in the next article! Operating this or that device, the user sometimes encounters unpleasant moments. Today I will affect one of them. In this text, I decided to give some tips on how to pull the drill out of the drill if you can’t do it. The reasons why it is not possible to do this seemingly simple thing can be very different. Here I described the main aspects on this topic and identified three main directions that I consider it necessary to reveal:

  • Replacement of the drill in a normally working cartridge;
  • Pulling out a drill without a key;
  • Extracting a drill that is stuck due to certain damage.

Consider each of these circumstances separately.

Correct tightening of the BCC bolts. How to tighten the GBC without a dynamometric key

Home Rastekak tighten the GBC without a dynamometric key

tighten, drill, possible, correctly

Why Tighten All Three Holes On A Keyed Chuck?

Cylinder head (HBC) in the engine plays an extremely important role. It houses a gas distribution mechanism, which is responsible for the order of injection of fuel and the removal of the exhaust gases. HBC is under constant exposure to high gas pressure and high temperature. The HBC is attached with bolts, studs and nuts, the correct tightening of which is imposed increased requirements.

The importance of the correct tightening of bolts or nuts of the GBC

Cylinder head (HBC). One of the most important components of the car. She closes the cylinder block. It has distribution shafts, valve covers and other parts of the gas distribution mechanism. The HBC is constantly affected by huge variable pressure and temperature strengths. Therefore, special requirements are imposed on its threaded fastening.

The head of the block must constantly experience the compression force, which is set by a certain moment of tightening threaded fastening. In order for the compression force to be evenly distributed over the surfaces of the head of the head with the cylinder block provides for a large number of mowing bolts or studs with nuts. The uniformity of the pressing of the GBC to the cylinder block is ensured by a certain scheme of the tightening procedure for threaded joints. To seal the joint, the blocking of the block head, made of a special material resistant to high temperature, is used. When tightening the head fastening, it shrinks into thousandths of a millimeter, which ensures reliable sealing of the joint.

Compliance with the proper procedure for tightening the BC bolts guarantees the correctness of its pressing to the cylinder block

The consequences of the fuckers of the fastening bolts

If the tightening of the threaded joints of the block head is carried out with the excess of the effort from the nominal, then the tensile force that affects the bolt or hairpin will begin to destroy the thread in the block or pull the body of the fastener element. The so.Called fluidity moment occurs, when, with a further increase in tightening force, the pressing force will begin to decrease. Bottom line: rapid burning of the gasket at the worst compression.

If the thread in the holes of the block is severely damaged, then it will no longer be able to provide the necessary pressing of the head with the right moment of the tightening. It will need to be restored, and this is additional costs. Experienced repairmen Motorists in practice feel the maximum tights of tightening, which can withstand threaded connection. They will never allow defects from bolts or nuts.

What will happen if it is not enough to tighten the bolts of the fastening of the GBC

If the head mount is performed with minimal effort, this will lead to a weak pressing to the surface of the cylinder block. Microscopic gaps are formed between the gasket and adjacent planes of the block and head, which will necessarily lead to the burning of the sealing material.

Checking the flatness of the block head with a special ruler

Insufficient tightening of fastening bolts does not provide normal fit of the head, which can cause warping of its butt surface.

Types of keys for the correct tightening of threaded joints

The tightening of the threaded connection should be done with such an effort to exclude:

  • Loose fit of the mating surfaces of fastening parts;
  • Fraction of thread threads;
  • Mechanical destruction of the body of the bolt;
  • Turning the faces at the nut or bolt head;
  • Destruction of engraving washers.

Any material from which the block is made (cylinder head, mounting bolts) has its own strength. It is the smallest limit of the strength of the weakest link in the mounting node that determines the greatest tightening force. The weakest link in the mounting of the cylinder head is bolts (studs) and thread in the openings of the block. Their weakness is determined not so much by the strength of the material of their manufacture, but with incomparable dimensions (diameter) with dimensions, block mass and cylinder head. It is clear that in order to destroy a solid cast.Iron block or a massive duralumin head, much more efforts need to be made than for the rupture of a thin bolt made of high.Strength alloy steel.

What effort to apply

The threshold or limit value of the strength of the responsible parts is usually given in the passport data of the engine. The values ​​of the maximum tights of the tightening of the fastening bolts are also given there. To perform tightening with the required effort, special dynamometric keys serve.

By the method of regulation and indication, dynamometric keys are divided into the following categories:

  • Unregulated with a constant moment of tightening. They are used to tighten the GBC on conveyors when assembling engines. Their advantages are high reliability.
  • Adjustable. These are the so.Called rattles with the possibility of installing a certain tightening moment. When this effort is achieved, the rattle is triggered, and further tightening becomes impossible. The rattle of the nozzle is often equipped with a reverse. In this case, she can not only tighten the bolts and nuts, but also unscrew them. Many head sets are equipped with rattle.
  • With a scale and arrow. With such a key, you can tighten the threaded joints with different efforts. Main conditions: you need a lot of free space and the possibility of convenient observation of the scale. It is included in the set of tools of locksmiths.
  • Digital indication in a compact device that measures applied effort. Very accurate, reliable, convenient tool in work. With it, you can tighten the bolts of fastening the block head with an accuracy of hundredths of NM directly on the car engine.
  • Combination of the exhibited tightening force with control of digital or arrow indication. Such keys protect the thread from making excessive tightening force, while allowing you to control the size of the moment using the indication device.

How To. Tightening a keyless chuck

What to do if the key is lost?

If the key is gone, it will be quite difficult to remove the drill. The easiest option is to cope with the problem of gross force. Parts of the clamping device are held with the right and left hand and rotated in opposite directions. However, if the cartridge is covered too much or used for a long time, it is unlikely that you can unscrew the thread.

When working, part of the power tool is heated, and the metal expands. This leads to jamming. It was easier to let go of the cartridge, wait until the tool has completely cooled.

To strengthen the attached effect, use various tools or homemade devices. Here are several ways:

  • Experienced craftsmen weaken the mounting of the cartridge with several tangent blows by the edge of the right hand. The drill is held by the left hand in a position by a drill from itself. The lack of the method. From the habit, you can injure the palm. And with a tightly protracted (and even more so spoken or jammed) mechanism in this way not to manage.
  • Select a metal shaft, the diameter of which allows you to insert it into the hole on the cartridge. In this capacity, you can use a nail, an old drill, a hairpin. The main thing is that the metal is strong enough and not bent from the effort. The screwdriver is introduced into the slot of the cartridge and act as a lever (the support goes to the shaft). Slightly lightly release the thread, and you can pull out the drill by promoting the mechanism with your hands.
  • The cartridge is clamped in a vise or held tightly with a gas key. The shaft is inserted into the hole, and then, by applying the muscular force, the mechanism is unwound or twisted.

The second method can help if the cartridge is clogged with particles of chips. Then its case is clamped in a vice, and a lever is slightly tapped with a hammer. Vibration causes a displacement of parts, and the mechanism is blabbed.

The effectiveness of the described folk methods is significantly less than when using a factory turntable. But once or twice, tighten or loosen the fixing mechanism in this way it is possible to. After finishing work, you need to purchase a new key in the store.

How not to lose a key?

In order not to be in the face of unfinished work with empty hands, it is important to properly organize the workspace. Such an organization will allow you not to lose the key from sight every time after changing the tool.

tighten, drill, possible, correctly

It is better to provide the key with a large bright keychain. So he will not be lost in disorder on a workbench and will not be forgotten in the of work clothes.

The easiest way is to protect against loss in your own workshop. Here you need to start a permanent place for storing the turntable and always put it there. In this case, the storage place should be quite convenient and located at hand:

  • Many manufacturers supply their instrument with a turntable. It is placed either under the handle, or not far from the fork. By inserting the key into this hole, you can be calm. It will not be lost. The only drawback is that over time, the fastening wear out and breaks.
  • Assle for a key is made of insulating tape. She is attached to the power cord. The mounting location is usually located 50-60 cm from the handle. So the turntable will not interfere with work and will always remain at hand.
  • Attaching a ring to the key, you can hang it on the hook next to the workbench.

If possible, you should stock up on another key. It is stored in a box in a workshop, away from the place of work. If the main key is lost, the reserve turntable will be at hand and save the position.

If in the process it turned out that the turntable was lost from the clamping mechanism, the main thing is not to panic. With the help of folk methods, it is quite possible to release the cartridge, get or change the drill, finish the work.

Greetings all in the next article! Operating this or that device, the user sometimes encounters unpleasant moments. Today I will affect one of them. In this text, I decided to give some tips on how to pull the drill out of the drill if you can’t do it. The reasons why it is not possible to do this seemingly simple thing can be very different. Here I described the main aspects on this topic and identified three main directions that I consider it necessary to reveal:

  • Replacement of the drill in a normally working cartridge;
  • Pulling out a drill without a key;
  • Extracting a drill that is stuck due to certain damage.

Consider each of these circumstances separately.

How to remove a drill with a good cartridge

If everything is regular, then there should not be problems with the idea in theory. Therefore, this section is rather devoted to the completely ignorant of anything in the power tool to users, since the operation itself is elementary. But still there are many people, so perhaps someone will need this information.

In this situation, a special key will be required to solve the key cartridge, or straight hands for relaxing its rapidly prisoner analogue.

tighten, drill, possible, correctly

In the first case, you need to insert the key into one of the recesses on the cartridge, and start rotating it counterclockwise. Promotion occurs due to existing cloves on both objects.

In the second, the drill should be included in the reverse mode (reverse rotation). With one hand, hold the outer body of the cartridge, and click on the start button. If your machine is not equipped with a reverse, then this is not very good-this should not be this, since only key cartridges are placed on such devices. But still, if this happens, then it is necessary to fix the drill axis (for example, with an open key) and rotate the outer body of the cartridge counterclockwise. In general, it will be better to remove such a cartridge and put a key.

We tighten the nuts: is a dynamometric key necessary so?

When conducting maintenance of the car, questions often arise that only casually stipulated on forums or in the literature. One of them is the moment of tightening the fasteners of the main components of the car. To clarify all the nuances of fastening the bolts of the cylinder block, we will concentrate on the engine, the “heart” of the car. And when understanding the principles of the moment of tightening of the threaded compounds, the acquired knowledge will not be difficult to extrapolate to any unit of the car.

We twist the bolts correctly

Any threaded connection is designed for a certain moment of tightening. It is regulated by industry standards of quality, for example, “OST 37.001.050–73 tightening of threaded joints. Tightening standards ”and leading documents of manufacturers of vehicles. Foreign manufacturers use other standards, but they are mainly similar to domestic. The information below will be stated, based on Russian standards.

To what extent you can tighten the threaded connections

Why is it important to withstand the correct tightening moment? Only competent tightening will provide a reliable fixation of the part, on the one hand, and prevent damage to the thread and/or the part itself. On the other hand.

Consider what will happen when the tightening moment is exceeded on the example of a bolt with a nut:

  • Immediate deformation of the thread. Due to the too large effort, the deformation and a breakdown of the thread on the details occurs. Bolt or nut is not subject to further operation, in addition, certain difficulties will arise when trying to unscrew the nut for replacement. Most likely, you have to use a drill or saw for metal to cut a nut.
  • Metal damage hidden from the eyes. It may seem that the nut is tightened correctly, however, due to the exceeding the flow rate in the bolt or nut, irreversible changes occur: deformation, violations of the crystal lattice of the metal. Such a case is especially dangerous, so invisible immediately, but after some time the bolt crack can lead to sad consequences.

Tightening of the cylinder head bolts with a dynamometric key

The limitation limit is called the mechanical characteristics of the material characterizing the voltage in which deformations continue to grow without increasing the load. Designation σT.

The unit of measurement is Pascal [PA] or multiple [MPa].

This is an important parameter with which permissible voltages for plastic materials are calculated.

After passing the fluidity in the metal metal, irreversible changes begin to occur, the crystal lattice of the metal is rebuilt, significant plastic deformations appear.

If, on the contrary, not to the nut with the corresponding moment, after a while it simply turns off, which can also lead to undesirable consequences. Therefore, it is strongly recommended to delay the threaded joints not “with all strength”, not by hand, but wisely, using special equipment.

Tools to control the moment of tightening

The main testing tool for tightening is a dynamometric key. This is the name of the wrench, in which the dynamometer is built (a device for measuring the moment of force). There are the following types of devices:

  • Indicator. When tightening, it displays the attached force in digital form or with the help of an arrow. Error. 6–8%. Indicator dynamometric key is inexpensive, but has the largest error
  • Digital-subspecies of indicator, but to display the moment uses LCD display. Supports the possibilities of notifying sound, unloading data to a computer, etc. Error. Up to 1%. Digital dynamometric key. The most accurate
  • Maximum. When reaching a given moment, it stops the tightening using the clicking mechanism. Error. Up to 4%.

Limit (click) dynamometric key is convenient to use

For unprofessional use or a small car service, an indicator or maximum key, as the most affordable. Digital will be in demand in a large car service.

How to choose an effort to tighten the connection correctly

When working with a limiting key in order to achieve the necessary moment, it follows:

  • Before the tightening start, choose the necessary force when twisting, for example, 50 nm. The force is exhibited on the main scale of the device, but not 50, but 48 Nm.
  • On the auxiliary scale, an effort of 2 nm is set, which in total will give us 50 nm.
  • Using the end head of the required size, tighten the nut. When reaching an effort of 50 nm, click will be heard and delay will stop.

The force control when working with an indicator type is visually.

In addition to a dynamometric key, you can find dynamometric screwdrivers and screwdrivers on sale, they work according to the same principle. When choosing a dynamometric key, remember that the tightening moment you need should be 25% less than the most allowable for the key. Using the key “at the limit”, you will quickly disable it. And also be sure to study the instructions for using it.

Well, you can check the correctness of the tightening of the connection with an angle.

The procedure for working with a home.Made dynamometric key

As a rule, a dynamometric key is a rather expensive tool. Its purchase is unlikely to be justified for private use. However, the simplest device is easy to make yourself. For this you will need:

  • Ordinary spring scales with a hook and a round scale, allowing you to weigh up to 20 kg (the so.Called Bezmen);
  • A segment of a rather thick pipe (2.5 cm) about half a meter long.

Having fixed the hook hook at the end of the pipe, we insert the wrench into the other end and pull the scales, twisting the nut. At the same time, to create a moment of 10 nm, you will need to attach an effort of 2 kg. According to this scheme, you can calculate in advance what effort in kilograms you will need to apply for tightening.

How to open a drill cartridge?

The purpose of the cartridge on the drill is a reliable fastening of the drill or other nozzles (construction mixer, grinding circle, etc. D.). Fixation is carried out by three mechanical “fingers”, which are reduced and divorced using a threaded mechanism.

There are two main varieties of cartridge:

  • A non.Closing variety. To open such a design, it is enough to grab the body with your fingers and, turning on the reverse rotation, briefly press the trigger of the tool. The drill itself will test the shaft, diluting the “fingers” fixing the drill. Such a cartridge is easier in work, but the reliability of fixing the tool will be slightly lower.
  • A variety equipped with a key. The key is a T-shaped device, at one end of which a conical gear-shaped gear is placed. Two other ends serve as a handle for rotation. To promote or tighten the cartridge, the key is inserted into the hole on the body and rotated, holding the body with the other hand.

As a rule, the key is included in the supply of power tools. It either lies in the box or attached to the power cord with a special mount.

How to open a drill cartridge?

The purpose of the cartridge on the drill is a reliable fastening of the drill or other nozzles (construction mixer, grinding circle, etc. D.). Fixation is carried out by three mechanical “fingers”, which are reduced and divorced using a threaded mechanism.

There are two main varieties of cartridge:

  • A non.Closing variety. To open such a design, it is enough to grab the body with your fingers and, turning on the reverse rotation, briefly press the trigger of the tool. The drill itself will test the shaft, diluting the “fingers” fixing the drill. Such a cartridge is easier in work, but the reliability of fixing the tool will be slightly lower.
  • A variety equipped with a key. The key is a T-shaped device, at one end of which a conical gear-shaped gear is placed. Two other ends serve as a handle for rotation. To promote or tighten the cartridge, the key is inserted into the hole on the body and rotated, holding the body with the other hand.

As a rule, the key is included in the supply of power tools. It either lies in the box or attached to the power cord with a special mount.

Rozhki key and end head

To dismantle the tightened fixer, the corner grinder can be applied to 17 and a 24 end head. However, they will have to finalize them before such non.Standard use. The wrench must flow to a thickness of 4 mm, and braid the protrusions for holes on the head of the corner grinder on the head.

Dismantling is as follows. The key is inserted under the abrasive, and the end head is put on the flange. Further, both tools must be crank in the opposite direction from each other. After that, the nut should get out without any effort.

These devices often replace a special tool, or are used as an addition. They are many times easier to loosen the clamp of the abrasive disk than the standard option.

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