How to unscrew the chuck from an electric screwdriver: step-by-step instructions and recommendations
electric screwdriver is used for various construction and repair work, but its main function. quick screwing in and screwing fasteners: self-tapping screws, screws, bolts, screws. It helps you do more things in less time than using a screwdriver.
Budget screwdrivers of low and medium power are used for assembly, installation and disassembly of furniture, equipment, construction of frame structures (partitions, walls, suspended ceilings) and other objects. A powerful impact tool is used to drill holes.
In addition to the normal functions listed in the manual, the screwdriver can be used for other applications. The mixer attachment is used to mix thin mortars. The device is connected to an ice pick through a special adapter to make fast holes.
The housing of most screwdrivers is made of plastic. this reduces the overall weight of the tool. Inside the housing are placed:
- engine. Depending on the type of device, it may be electric or pneumatic. The former are cordless or cordless powered, the latter work from a tank of compressed air or a compressor.
- Gearbox. Gear mechanism that transmits the rotary motion from the motor to the spindle.
- Regulator clutch. Connected to the gearbox, it is used to adjust the screwing depth and the torque.
- Starting capacitor. It starts the motor.
- Chuck. It holds bits, drills, and sockets. The most common are the three- or four-claw quick-action ones.
- A power supply unit (battery) and/or a power cord.
On the body is placed the control panel with the power button, speed switch. Reverse is used for operation in unscrewing mode. Additionally an electric screwdriver can have a backlight, a fuse.
Drill chuck: device and varieties
A large proportion of drill models are equipped with what are known as cams. This version is a hollow cylindrical body, on the surface of which there is a movable part in the form of a ring or regulation sleeve. One base of the cylinder is attached to the shaft of the drill. A second base is used to secure the bits. The process of turning the adjusting ring causes the jaws, made of metal, to move. The approach and removal of these cams depends on the direction of the ring rotation.
To fix it on the shaft, the housing is equipped with a special convenient threaded hole or has a special tapered surface. There are also types of chucks that are best suited to equip specially designed models of peorator. It is also possible to dismount and change it by yourself. Chucks with a cam-type drill chuck can be employed in the standard drill mount and shank within the following dimensions of 0.8-10mm and 1.5-13mm.
In order to ensure maximum reliability during fastening it is very important to tighten the chuck with considerable force. Cam chucks can be:
To tighten or loosen the adjusting ring on a “normal” device, you will need to use a special wrench.
Classification of cartridges
There are several varieties of them:
With quick-change elements, you can change a bit or drill in seconds without using any additional tools. They are divided into single and double coupling types.
In the latter version, to attach the drill, you have to hold the sleeve with one hand and screw with the other. Single-feed chucks have a shaft locking system that triggers a tool change. Minus of such products is low strength of fixation of drills. In addition, the use of plastic parts significantly increases the risk of damage to the chuck.
It is better to install cam chucks on impact drills and torches. They are stronger, so they are often used for work in harsh conditions. In such products, plastic elements are not installed, and the fastening of tools is performed with a special wrench.
There are also collet SDS chucks that were designed in the 70s. In the shank of this design there are two grooves, the size of which is 10 mm.
With this system, part of the drill bit has to be screwed into the chuck by 40mm. It is secured by locking balls. In addition, there are four grooves, two of which are locking and the rest are used for guiding wedges. The spindle of the instrument equipped with this design automatically locks immediately after installation.
Some tips for using the drilling tool
To avoid health hazards from flying tools or concrete chips, drilling must be done safely. Protective goggles, gloves, earplugs or ear muffs to protect your ears should be used as a means of ensuring such safety. Naturally, all work should be done in special clothing that does not have any dangling elements that could become wrapped around the drill.
To prevent overheating of the power tool used for drilling, you must give it regular rest. It is very important to insert the drill correctly (you have to do it until the tool stops).
Two ways of clamping a thin drill bit chuck if the jaws don’t reach the shank a bit
If the drill bit is stuck in the wall while drilling, it should be removed without removing the tool from its surface. To do this, you must remove the drill bit from the chuck and insert another, with which you must begin to destroy the wall around the drill bit that is stuck in it.
If the drill cannot be extracted from the drill or drill press, then it must be clamped in a vise, and then with a hammer, using a wooden pad, tap on the cams of the clamping mechanism. Oil, a few drops of which are poured into the key-type chuck can help.
How to remove and change a chuck on a drill
In electric drills, a special device called a chuck is used to securely hold drills. Jaw chucks are the most commonly used in domestic drills. With heavy use, they can fail and require replacement or repair. Problems often arise during these operations. In this article, the master plumber will tell you how to remove and change the chuck on the drill.
The chuck serves as the seat, holding the main working element of a drill, an electric screwdriver or a torch. It can be not only a drill, but also a concrete drill for tools with an impact function, a special attachment in the form of a cross or flat screwdriver. There are special attachments for the drill, designed for grinding, stripping various surfaces. They are mounted on a rounded or multi-faceted pin, which is also installed in the chuck.
Drill chucks differ in design and method of installation on the tool and are divided into three types:
Tapered chuckThis chuck was invented back in 1864 by American engineer Stephen Morse, who also designed and proposed the use of a twist drill. The peculiarity of such chuck is that the clamping of the working element occurs due to the mating of two shaft surfaces and a separate part with a landing hole. The surfaces of the shafts and the drill hole have equal taper sizes, with angles ranging from 1°25’43” to 1°30’26”.Angle is adjusted by rotating the base of the mechanism, depending on the thickness of the element to be installed.Toothed-ring design
A more common type of chuck on hand-held power tools for home use. The principle of this type of chuck is simple. at the end of the pin coming out of the drill, a thread is cut and the chuck is screwed on it like a nut.
Drill bit is held in the chuck by three tapered blades in the center of the chuck in the collet. When the nut on the collet is turned with a special wrench, the lugs come together and clamp the shank of the drill bit or other work item. mixer whisk, screwdriver nozzle, impact chisel, tap.Quick-action chuck
Considered to be the most convenient option. This is the latest technological modification of this device by time of invention. It is used in almost all modern models of well-known drill manufacturers.Working cutting or other element is also secured by special paddles, but a wrench is not required to clamp them. Locking petals are clamped by hand. by turning the regulating sleeve, on which for the convenience of scrolling is applied corrugation.Additional locking mechanism at the base of the sleeve prevents it from unscrewing when the tool is in use.How to remove the chuckSince all types of chucks for drills have their own design features, then their disassembly involves different actions. Special tools are also needed.Dismantling by improvised or interchangeable means is also possible, but during the first disassembly it is not recommended to experiment, because you can damage the tool.In general, the procedure is simple and do-it-yourself at home.Cone chuckThe Morse method of securing the chuck is one of the safest methods of securing the chuck, but it doesn’t require complicated manipulation. The design perfectly withstands force loads along the axis in both conventional drills and tools with an impact function. That’s why it’s so widespread in manufacturing plants.The chuck can be disassembled in several ways.Strike the chuck body with a hammer from below. The main thing is that the impact should be directed along the axis in the direction of the seat of the cutting element. the drill.
The design and features of the toothed-ring chuck
A classic drill chuck is of the collet or jaw type. Not only different tools with a round shank can be fastened in them, but also cylindrical workpieces for their further processing. The basic design elements of cam chucks are:
- The body is cylindrical;
- the adjustment ring or sleeve, which rotates on the outside of the body;
- Cam or collet mechanism mounted on the inside of the chuck body.
How to Remove a Drill Chuck
Design of the cam (toothed-ring) chuck with a key
The collet mechanism, which elements are made of hardened steel, consists of three absolutely identical cams which simultaneously approach each other when rotating the adjusting ring or a sleeve, thus providing a firm grip of the tool shank. In the early mechanical drill chucks the collet cams were aligned by the rotation of the adjustment wheel, nowadays this is done with an adjustment sleeve.
One side of the drill cartridges are installed on the shaft of the used equipment, and with the other side the tool is inserted into them, with which the treatment will be performed. Clamping jaw chucks are primarily used to hold the following tools in them:
The cam chuck of the drill is designed for clamping bits with a cylindrical or hexagonal shank
How to unscrew a chuck fixed with a threaded connection from a drill
Chucks that are fastened to the tool shaft by a threaded insert are in general additionally secured by a left-handed screw. That’s why you start removing the drill chuck by unscrewing it. To get to the screw, the chuck jaws need to be recessed as far as possible, as shown in the photo.
The head of the Phillips screwdriver or star screw should be visible in the middle of the chuck lid. left-hand thread is used to prevent the screwdriver from unscrewing during drilling. Therefore the screw should be unscrewed by turning the screwdriver clockwise. There may be no screw. In this case you immediately proceed to the second step. unscrewing the chuck.
How to unscrew the chuck from the shaft of a drill or electric screwdriver
To remove the chuck from the tool, you need to fix the shaft and grab the chuck by the body and twist it counterclockwise, when viewed from the side of the cams. The main thing is to break the chuck from the dead point, from there it is usually easy to unscrew.
I was lucky because the round base of the chuck had chamfers that are good for getting hold of with a wrench The chuck I bought for replacement didn’t have those chamfers.
After gripping the chuck with the open-end wrench and hammering the wrench with a hammer, even without locking the shaft, as shown in the photo, the chuck has released. But it was tight, and there was a reason for that. I had to keep twisting it with light blows on the wrench with a hammer.
When looking inside the chuck I did not see the “fixing screw” because the hole in the head for the sprocket bit was clogged with mud, which I just had to remove. So, when I unscrewed the chuck, I simultaneously broke the thread of the fixing screw, and it’s strange that it didn’t break off.
If the chamfer on the base of the chuck is not available, then you need to clamp in its jaws hexagonal bar or bolt M10-12 with a hex head on which to throw a wrench and tap it with a hammer. If you can not unscrew the chuck in this way, you will have to dismantle the drill, take out the shaft with the chuck, clamp it in a vise and twist. You can use a pipe wrench instead of the open-end wrench by grasping the chuck by the outside of the housing.
How to screw the chuck onto the shaft of a drill or electric screwdriver
Find a new screw with a left-hand thread did not work, because they are used only in exceptional cases. I tried to screw it back into the drill shaft, it screwed in without any problem and held firmly, to my surprise.
For more convenient tightening and later unscrewing I decided to cut in the head of the screw with a metal hacksaw a slit for a flat-blade screwdriver. In order not to spoil the already damaged thread, before clamping the screw in a vice, wrapped a piece of leather around the thread.
A drill chuck of the same type was bought beforehand. Installing it on the drill was no problem at all. It is screwed clockwise like an ordinary nut on a bolt. Simply lightly screw the chuck onto the thread of the shaft and switch on the drill while holding the chuck slightly against the housing. When the chuck is turned all the way in, let go of the chuck and turn off the drill.
Then the chuck jaws must be unclamped and the retaining screw tightened. The drill is now repaired and ready to use again. Test drilling showed that the drill works like new, the chuck is firmly held, the drill bit is clamped easily and securely.