How to insert the bit into an electric screwdriver?
To fit the required bit, you choose the size of the fastener head and insert it in the magnetic chuck holder. To do this, the chuck and socket must be removed from the tool. After inserting the required bit, the chuck is reattached to the tool body. Then the optimum bit speed has to be set.
In order to remove the drill bit or bit, you need to reverse the electric screwdriver, fix the chuck and turn the electric screwdriver on: the cams open and release the drill bit or bit. Screwdriver torque limiting clutch, which became a standard in most screwdrivers. There is an arrow at the top of the housing opposite the chuck that indicates the number.
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How to work in tightening mode?
Before you start work, you need to prepare the tool. If it runs on battery power, you need to put it on charge.
The next step is to install the bit. In order to select the right nozzle, you need to consider the size of the fastener’s head and the type of slot. Bits vary in type and diameter:
- the slotted tool. Most commonly used. To drive countersunk-head screws, flat-head screwdriver screws. Tip width varies.
- Phillips. They are used for screwing and unscrewing self-tapping screws, countersunk head screws. The point has four radiating diagonal ribs.
- Hexagonal. Used for fasteners with hexagonal recesses in the head. Screws and screws of this type are used when assembling furniture and appliances.
- For bolts and nuts. The nozzle with the tip, inside of which there is a hexagonal recess. They are used as a nutrunner, for screws, bolts and screws.
There are other bits available, but they are used less frequently. How to change or remove a bit in general? After deciding which bit is the right one, the bit is inserted into the chuck. Installation depends on the type of chuck. Insert the bit in the quick-action screwdriver: turn the chuck counterclockwise until the distance between the jaws increases. Push the end of the bit between them and turn the chuck clockwise to make the jaws close and clamp the workpiece securely.
In an electric screwdriver with a wrench chuck, the process of changing the bit is more complicated. First, a wrench is inserted into the special hole on the device, turning it counterclockwise to loosen the clamp. Insert the bit, fix it by turning the wrench clockwise.
The next step is to check the functionality of the tool. If the electric screwdriver is powered from the mains, connect it to the socket. Press the start button, check if the bit rotates. Adjust the rotation speed with the same button, easing or increasing the pressure. The bit tip is inserted in the recess on the fastener’s flat bar and the trigger is pushed.
If a self-tapping screw or screw must be unscrewed, switch the reverse button.
How to insert the bit correctly
How to change the bit on an electric screwdriver and correctly place, depends on the type of chuck in the design of an electric screwdriver. There are 2 basic types of holder. a key-action and a quick-action. The difference is the need for a special key, which allows you to change the bit in the chuck of the first type.
To secure the bit in the key holder of the tool, proceed as follows:
- Take the spanner, which resembles a rod with a lever and an attached toothed wheel.
- It is inserted into the groove on the chuck, and the gear is set on the teeth of the bit.
- Turn the wrench to unlock the cams.
- Insert the tip of the bit into the chuck.
- Clamp the bit jaws with a wrench, turning it in the opposite direction of each slot in turn.
To fix the tool in the quick-action chuck, the jaws are separated manually by turning the sleeve counterclockwise. Insert the bit into the hole. In doing so, the bit holder collar must be tightened in the opposite direction. With a single-feed chuck, the procedure can be carried out with just one hand. If the double-coupling version is installed, hold the right hand on the far side of the chuck and use the left hand to rotate it.
Check that the procedure is correct by turning the electric screwdriver on in no-load mode. If the bit fluctuates, the experts recommend removing and clamping it deeper.
How to remove the bit from an electric screwdriver
Those who work with the tool, it is essential to know how to remove the bit from an electric screwdriver. To remove the bit or drill bit, the electric screwdriver is reversed. Screwdriver chuck has to be locked in place and the tool switched on. The cams will unclench, the bit will be free and you can take it out.
Any Metabo, Interskol, Hitachi, DeWALT and other electric screwdriver models can jam the clamping device. A bit can get stuck for a number of reasons, one of which is the use of the largest sized drill bit. The jaws of the chuck have to be pushed to the limit. and then there’s no way to squeeze them. If they are not squeezed evenly, they cannot be unclamped to pull out the jammed drill bit or bit.
jaws may jam, the bit can be jammed because of the free movement during clamping and unclamping. This happens if the shaped parts of the jaws get caught:
When such situations occur, it is impossible to work with the tool although it is serviceable. You can try to fix it yourself, but if you can’t, you can call in a specialist. Almost all screwdriver models are the same, so the ways to remove a jammed bit are the same.
The first thing to do is to add grease to the jammed chuck to make it open. For this purpose perfectly suits grease WD-40. It is poured so much so that the liquid flows over each cam. The grease is left for 15 minutes. Then gently tap the knuckles through a cloth. Most often after such a procedure the problem can be solved. But in case the cartridge did not open, you can warm it up a little with a hairdryer.
Some people use adjustable wrenches to remove the bit. After you grease the chuck, you clamp the base with one, and gently twist the top part of the chuck with the other. As soon as the stuck bit can be removed, the electric screwdriver must be cleaned.
The bit is magnetized for convenience
How to secure the bit in an electric screwdriver
This article is intended for those people who have very little knowledge in the use of construction tools.We think that quite a few people start their acquaintance with construction tools by making a purchase and only afterwards start to learn how to work with them. over, among the readers of this article will probably be teenagers or women who have no idea what an electric screwdriver is and what it can do with it. That is for them, and we decided to write this article.
For a start in general words let’s talk about what an electric screwdriver is. Firstly, they can be divided into two large classes: cordless and mains-powered. The efficiency of these tools depends directly on the brand of the tool, but the cordless does not depend on the availability of a socket and the length of the wire.
For the home handyman, it is best to choose a cordless tool. it is more convenient and practical. Let’s start with it.
Typically, cordless screwdrivers are sold in cases that include a couple of batteries and a battery charger in addition to the tool itself. When buying, it is best to check that the tool is complete and working properly when you go to the dealer. It should be understood that the electric screwdriver comes from the factory uncharged, so when you bring it home it is imperative first of all charge the batteries with the battery charger.
After that we put one of the batteries into the tool and it is almost ready for work. For the work we still need to insert another element into the chuck. the necessary bit or drill. You can buy a set of bits and drills in the store, or you can buy them separately, similarly for drills.
Modern screwdrivers, except maybe low-power models, have a drilling and drilling with impact, so you can also use them to drill holes in metal and wood, as well as concrete and brick.
Before using an electric screwdriver, check that the tool is in good condition. There must not be any mechanical damage such as dents or cracks on the body and the batteries. Do not operate the tool if it is damaged in any way.
To make a hole in metal or wood, you need to put the appropriate drill bit in the chuck. For wood, if necessary, the drill bit for metal is also suitable. After that, you must set the desired mode. drilling. This is done with the rotary part of the tool just behind the chuck of the electric screwdriver. Locate the drill bit in the marking on the body of the electric screwdriver and align the rotary part (arrow) with the drill bit. In doing so, the electric screwdriver would go into electric drill mode. This mode should be used with caution. The point is that the tool has the so called ratchet (protection of the motor from the excessive force on the shaft) is turned off. If the drill jams, the motor can burn out.
Then we put the drill bit to the drilling point and press the start button. When drilling, it is important to keep the electric screwdriver perpendicular to the drilling axis. Drill bit misalignment, especially in hard material, can lead to drill bit breakage. Drill harder materials at low speed, and soft materials, such as wood at high speed. By the way, if your electric screwdriver has a button for switching speeds (usually two speeds), it is best to drill with the second speed. When drilling, you control the force of the pressure by yourself. Unfortunately it is difficult to explain in words, so you can determine this parameter in practice.
For drilling holes in concrete and stone we need a special drill bit with a pobedite tip. Usually everyone uses a drill bit 6 mm in diameter, which fits most plastic dowels for self-tapping screws. You should not take a thicker drill bit. simply the power of an electric screwdriver is not designed for it. here you need a torque motor.
Before drilling, put the electric screwdriver into drilling mode with breakage, as described above. To do this, align the arrow with the image of a drill from the cutoff or drill and hammer (depending on the brand of the tool). Hold the tool perpendicular to the axis of the hole, just as in the previous case. There is no need to apply too much pressure when drilling, although it must be sufficient to gradually deepen the drill bit. Periodically loosen the pressure and even take the drill bit out of the hole to remove the drilling products (dust).
And finally we got to the main purpose of screwdrivers. screwing screws (from what its name follows). On every electric screwdriver (on the pivot part) there is a circle with a number: 1, 2, 4, 6, 8, etc.д. They indicate the tightening torque in newtons. The thicker the screw or screwdriver and harder the material in which it is screwed, this figure should be greater. To drive e.g. roofing screws into metal, a torque of 12. 14 N is usually sufficient.
For standard self-tapping screws in wood 8 N are sufficient. Again, this force is selected individually for each type of screw and substrate material. It is better to start with a new screw type by setting the torque to a lower value, then you can increase the torque and tighten. But if you immediately put a lot of force, you can twist the screw, which will break off the screw head, or twist (screw or screw pressed through the fastened material).
Depending on the screw or screw head, you need a variety of bits. For standard self-tapping screws a PZ2 bit, for small self-tapping screws a PZ1 bit, but for roofing screws an 8 mm bit is sufficient. Also with an electric screwdriver is very convenient to assemble case furniture. If you have a screw bit, you can assemble furniture many times faster. Besides you will avoid smears on your fingers from screwing in large amounts of mortars by hand.
The design of an electric screwdriver
All varieties of drills have the same design, including:
The drill guide is used to position the drill bit and connect it with the rotary shaft. It has 3 to 4 cams between which the drill is placed. The jaws are moved by the rotation of an adjusting sleeve. Clamping, t.е. the cams are brought together by turning the sleeve by hand or with a special wrench.
The electrical part consists of the electric motor, starting, reversing and motor speed control systems, as well as the power cord or battery. A single-phase collector motor is used as the driving source. A starting capacitor is installed for starting the motor. The power supply to the motor is made through the contact brushes fixed in the holders.
The switch is usually designed as a push button. It is aligned with the engine speed regulator. The control circuit on the transistor base is designed so that when the start button is pressed harder, the motor armature speed increases.
Reverse direction of armature rotation is achieved by reversing the polarity on the input terminals. The reversing lever is on the machine body.
The mechanics of an electric screwdriver includes a gearbox, bearings, and a force-limiting mechanism. The gearbox enables the armature shaft’s rotary motion to be transmitted to the main shaft that holds the drill chuck. The planetary gearbox contains a system of gears, satellites, and drivers. The number of speed regulation steps depends on the number of satellites.
The force-limiting mechanism is designed to optimize the screw load when tightening. When the screw is fully torqued, the drill bit’s rotational resistance increases and the mechanism stops the screw rotation. In total the machine can have up to 16 different force settings.
What to do if the chuck in an electric screwdriver jams?
If the bit jams in the chuck of an electric screwdriver Bosch, Texas, Practice, etc., the use of two adjustable wrenches effectively solves the problem (after lubrication). Clamp the base of the chuck with one hand and gently twist the upper part of the chuck with the other.
It is designed to drive in or out of bolts or nuts. In contrast to an electric screwdriver, a chuck is not attached to the nutrunner In terms of performance capability, the nutrunner has serious limitations. It is good to use drill bits when carrying out drilling.
Care instructions for the tool
An electric screwdriver requires a minimum of care. For the tool to work properly, it is necessary to adhere to the recommendations specified by the manufacturer, not to use it for tasks that are not specified in the data sheet, not to overload too often. The inside of the chuck and rotating parts should be periodically lubricated with machine oil.
Store the tool in a dry place, away from heat, humidity, and sunlight. After each use, wipe the housing with a clean, dry rag to remove construction dust from it. If your electric screwdriver gets a drop of mortar on it, you can clean it with a well wrung out soapy rag.
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If you follow the rules of operation, do not use the tool for tasks that exceed its capabilities, you can significantly simplify repair and construction work. To keep the electric mower long and not break down at the wrong moment, it is necessary to take care of it in time, check the condition of parts and recharge it before use.