How to unscrew a slugged screwdriver bolt
The second method: Drill and bit
A drill or electric screwdriver and a drill bit can be used to remove a screw with stripped slots. This method is often used in service centers, it causes minimal damage to the body of the device.
- Simply choose a drill bit thinner than the head of the screw and drill it out, leaving only the stem.
- After that the foot can be removed with an extended pair of pliers.
This method is good for unscrewing screws in laptops and phones. These devices are disassembled when repairing, replacing components or for preventive maintenance and disassembly. this is the main problem that every repairman faces.
Ways to remove a bolt with a torn edge
Only after a number of preparatory work has been performed and the selection of necessary tools has been carried out, you can proceed directly to the extraction procedure. There are various ways to unscrew a bolt with torn edges, so it is worth considering each of them:
- Using gas (pipe) wrenches. The application of this method is relevant with sufficient space for work. Such a tool is versatile, because it can be used not only for surfaces with faces, it is good for unscrewing cylindrical parts that have absolutely no threads. The larger the pipe wrench is, the less force is needed when working with it.
- Removal of the damaged bolt with socket wrenches with different socket sets. When unscrewing, attention should be paid to selecting the right diameter of the head, because it is necessary to avoid its twisting and interaction with the fastener.
If you are unable to remove a screw with a torn edge by using the above described methods, you should use other, more efficient, complicated but effective methods.
How to get a bolt if the thread is torn off
There is a considerable variety of fasteners in modern technology. These include conventional hex bolts and nuts, flat and Phillips screws, Torx sprockets, and many others. Parts with internal hexagon stand out here. It is quite difficult to unscrew them without the right tool.
The internal hexagonal slot was first patented in 1936 by the German company Bauer Schaurte. In foreign technical literature such screws are usually referred to under the trade mark Inbus. This is an abbreviation of the German phrase Innensechskantschraube Bauer und Schaurte. screw with internal hexagon from Bauer Schaurte.
Benefits of the internal hexagon
Bolts and screws with internal hexagonal slot have a number of advantages compared to conventional fasteners. First, there is no space required around the slot in the head. The screw can be completely “sunk” into the workpiece, which is very convenient for all kinds of drain plugs.
Secondly, the transmitted torque can be up to ten times higher than that of the fastener with a phrenic spline. That’s why the Inbus slot is often used in high-tension applications such as machine tools and road construction equipment. This also makes it possible to use smaller sockets for larger-diameter screws, making it possible to use one size tool for servicing different assemblies. Bicyclists know this well. only one hex key is needed for servicing bikes while on the road.
Third, with the right quality wrench, it is quite difficult to break the notches of the internal hexagon. nearly wear-free, the notches can be used repeatedly. important for the attachment of inspection doors of all kinds that require frequent opening and closing.
Fourthly, the internal hexagon wrench is simple and cheap, compared to the horn, socket and socket wrenches of external hexes.
And finally, screws with an internal hex head are much safer, because they have no sharp external edges, and look more aesthetically.
How to unscrew an hexagon without a wrench?
Of course, nowadays the hexagonal wrench is not something inaccessible. You can find all sizes of hexagon keys at any auto store or market. But is it worth buying even a relatively cheap wrench in order to unscrew the tricky screw once?
This is a problem often encountered by motorists who decide to repair their car on their own. The internal hex almost always has a drain plug on the gearbox and often the plug in the engine crankcase.
The home handyman may encounter hexes when repairing a bath faucet or ball valve. conventional fasteners just don’t fit there.
And in all these cases, the size of the hexagon is pretty decent. What to do? A bolt with a regular hexagonal head may help.
The bolt head is inserted into the hexagonal slot and unscrewed by the rod with a gas wrench. You can also screw 3 or 4 nuts onto the thread of the bolt, give them a good wedge into each other and unscrew with a normal ring spanner.
When unscrewing, use the nut closest to the head and the nut farthest away when tightening. If the size of the hexagon is irregular, the head of the hexagon can be sharpened with a file or a sharpening machine.
What to do if the hexagon snapped?
Attempts to unscrew hexagon socket screws with improvised means or a wrench of a slightly inappropriate size sometimes result in tearing of the facets. In this case there is a solution too.
If the hex is small, a TORX star of suitable size can be driven into it and unscrewed. If a head is available, it is worth trying to unscrew the screw using pliers, a torque wrench or a hand vise.
If there is space a hammer and chisel is almost always helpful. The chisel should not be too sharp, and the impact should be tangential to the unscrewing side. By the way, check if maybe the thread on the screw is left-handed?
For steel bolts and hexagon socket screws you can weld a nut, a piece of rebar or something similar to the head that will hold the bolt.
And remember that one person can always unscrew the other.
And here is another way to unscrew problematic screws using an engraver with a cut-off wheel. It is also possible to do this on a large scale, using a hacksaw or angle grinder.
In the process of repairing the car or other equipment, an unpleasant situation can happen when a bolt or stud gets torn. And they break by the law of fate, flush with the part or worse, deep in the part. That way the broken thread is as if sunk into the part.
Bolts and studs tend to break when unscrewed if they are severely rusted and stuck. It is also possible to break a bolt or stud when tightening it by applying very high torque.
There are several ways to solve this problem. And the choice of method depends on the specific situation. Let’s look at each method separately.
Preparing for unscrewing a broken off bolt.
If the bolt is corroded and will not be unscrewed by welding, it should be lubricated with penetrating grease. There is no point in lubricating the joint and then burning off the grease.
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You can use a common and well-proven lubricant, WD-40. Or you can make a mixture of kerosene and machine oil in the ratio of 1:1 and pour the bolt with this mixture. After oiling the bolt it is advisable to wait for some time, e.g. one hour. The grease needs time to penetrate into the joint.
How to drill a broken off bolt without damaging the thread.
If the bolt breaks off in the depth of the part, a metal bushing can be used to center the drill. Its outer and inner diameters are selected according to the diameter of the drill bit and the diameter of the hole for the bolt in the body of the part. This sleeve can be ordered from your local turner, or made from a metal tube of suitable diameter.
It is also possible to take a drill bit of larger diameter, which will fit the diameter of the hole in the housing, and make a small centering-drill hole for the next drill bit. Then take the drill of a smaller diameter and according to the previously made alignment drill.
There are special pilot drill bits. They are mainly used for turning work. The drill can be used to center the broken bolt easily without damaging the thread, and then drill the hole with an ordinary drill.
Unscrewing a broken screw with an extractor.
What is an extractor?? This is a special tool in the form of a cone drill with a left-hand spiral. This tool has increased strength, that is, it must be hardened. This applies only to quality tools. Chinese handicrafts can be made almost out of “plasticine”.
How the extractor works? It is screwed into the bolt with its left-hand tapered thread until it is jammed in the bolt. Further torque applied to it results in unscrewing the broken off bolt, since the bolt in most cases has a right-hand thread.
How to unscrew a torn off bolt
If there is insufficient grip area for a pipe wrench, attempting to use the tool in this situation is almost useless. It is necessary to use a file to make a facet on the ripped off item of smaller diameter. After successful machining, a wrench or head of the correct diameter is selected, and the torn off element is gently unscrewed.
Using a hammer in conjunction with a chisel can facilitate the work, it is necessary to make a notch and produce accurate strokes unscrewing tool. This method is considered effective, because it affects the impact force in the right direction. Once you can visually determine that the process has moved, you can use a suitable socket wrench or head.
If you have a welding machine at hand, you must weld the nut on the head, then a sharp movement is possible to unscrew the ripped off part. If it is not possible to weld the nut due to lack of space, a piece of metal is welded on for further work on the edges.
How to unscrew the connection element with a torn edge can be told by experienced craftsmen, some simply proceed to drill it out without wasting time. An effective way is to remove the washer between the bolt and the clamping area. The chisel set on the nut is struck with a hammer.
Another problem familiar to motorists (and not only) is a rusted nut and/or thread. In this case it is not necessary to make heroic efforts to unscrew the fastener. You’ll just have the facets sticking together and another problem added to the boiling threads. If after a couple of attempts, you can not unscrew, in turn try the following methods:
- Use a wrench to tap the bolt. There is a chance that the rust will crack and the nut can be unscrewed.
- Pour kerosene on the joint and wait. It would dissolve the rust, and then the rusty nut would be easier to unscrew. But during this operation it is forbidden to smoke, turn on the welding, be near an open flame.
Not the most elegant solution, but it works
You can also fight rust with the help of grease. Try to fill the joints with liquid universal grease (available in WD40 cans). After waiting a couple of hours, try to work with a wrench. Does not work. try the other methods one by one.
How to unscrew the hexagon without a wrench
Other ways to unscrew a bolt without a hexagon are as follows:
- If the size of the bolt is not too small, you can use a chisel or a regular hammer to hit it at an angle to the side where the fastener will be unscrewed.
- The method with a ring spanner or a socket wrench.
- If you have a problem, how to unscrew a fused hexagon, you can use an impact wrench. Bolt connection is unscrewed with an impact tool.
- The method of welding: a small amount of metal is welded to the fastener with a nut or any piece of fixture, which he then unscrewed.
- Extreme measures to unscrew hexagonal hardware with an internal axis is the complete dismantling of the fastener, when the notches are made with a hammer and the fastener is disassembled.
Read also: What is graphite grease for
This topic was posted in Audi Repair, by uffiget on November 19, 2009.
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Repairs may bring surprises. The equipment can fail, the seemingly strong part can break at the most unnecessary place, and bolts and nuts resist unscrewing. And then the repair is stretched, taking extra time, nerves and money.
Now in the network you can find many videos with a guide to any repair work. They say you can build a house from scratch and rebuild a car by the screws on the basis of the video from the Internet.
But with so many tips and recommendations, it is difficult to choose the right way of action for you. In this article we will try to collect all available experience and systematize it for easy use.
How to unscrew the hexagon without a wrench
Other ways to unscrew a bolt without an allen key are the following:
- If the size of the bolt is not too small, you can use a chisel or an ordinary hammer: they are struck at an angle in the direction of unscrewing the fastener.
- The way with a ring spanner or a gas spanner.
- If there is a problem, how to unscrew the “plumed” hexagon, you can use an impact wrench with a nozzle. Bolt connection is unscrewed with a hammer mechanism.
- The method of welding: a small amount of metal is welded to the fastener with a nut or any piece of rebar, with which it is then unscrewed.
- Extreme measures to unscrew hexagonal hardware with an internal axis is a complete dismantling of the fastener, when the notches are made with a hammer and the fastener is disassembled.
How to remove a broken bolt with an extractor
Three breakage options are possible: flush, inside, and outside, when the top of the damaged part is higher. The place where you want to drill a hole is not straight. It is difficult to work on. The drill moves.
Even with an additional sleeve to make this operation is not easy. It is easiest when the bolt protrudes from the structure. It is necessary to grind with an angle grinder, file to level the surface. Nock the center of the hole and start work.
When performing the operation, you need to accurately perform the drilling and hammering of the fixture for alignment of the direction. This ensures the strength of the connection. Screwing tools are prone to proper orientation. You need to start screwing the extractor in effortlessly.
When the approach is made, the load is increased. After jamming, continue unscrewing the part. If it is difficult to rotate, you must make a movement in the opposite direction, and then continue extracting again. Otherwise there is a risk of breaking the tool.
The easiest ways to unscrew the problem bolt
If you do not have any special tools handy, you can probably find fluids that will reduce friction in the connection and unscrew it. Such means are kerosene, fuel oil or brake fluid. But the best option is WD-40, but not everyone has this aerosol product at hand. To apply the method, all you need to do is clean the joint with a metal brush, and then, if the location allows, drop one of the above remedies into the thread. You have to wait about a quarter of an hour and try to unscrew the connection.
As an alternative, you can try heating a jammed bolt. As we all know very well from physics courses, the metal from the heat expands, and it will help break the bond in the thread.
Finally, you can use a gas wrench, which is also available at home almost everyone. The peculiarities of this spanner are its extremely firm grip and the possibility to apply much more force.
It is important! Sometimes a bolt can be unscrewed simply by tapping. To do this, you need to tap on the stuck hardware with the same hammer. But do not overdo it with too much force.