Among the advantages of a mini-drill, it is worth noting its compactness and low cost. In order to save money and not doubt the efficiency and reliability of electrical equipment, modern craftsmen have become adept at making power tools at home. With your own hands, today you can assemble a hand-held micro-electric drill, a high-frequency drill and more. How to make rotary instruments and components for them - read below.

Every crafter needs a small electric drill. electronic crafts or does fine decorative work. This machine is ideal for performing minor works wood, plastic and metal, drilling printed circuit boards.

You can assemble a mini-drill at home from a cartridge, a jar soap bubbles, a motor for rotating the cartridge, a battery.

The motor can be taken from a hair dryer or grinder. An electric motor from a VCR or a motor from an old cassette recorder are also suitable for making crafts.

To make an electric mini drill you need:

1. Connect the cartridge to the motor. This is best done using cold welding. But you need to work quickly and carefully: the weld quickly hardens and becomes as strong as iron. If it fails, it will not be possible to redo the connection.
2. Place the cartridge in the jar. For better fixation, the cartridge must be treated with hot glue.
3. Make a hole in the second base for the switch. It’s better if the switch is small and keyboard-based.

To make a drill with your own hands, you should study the theory and watch a training video

The hand micro drill is ready! All that remains is to solder the wires from the motor and power to the switch, observing the polarity. To power the mini-drill, 9-12v batteries will be enough. Additionally, you can do reverse on a six-pin switch.

DIY collet chuck

A collet (or clamping) chuck for a mini-drill is an adapter device used to clamp drills, which is attached to the output shaft of the motor. The mini-chuck allows you to use drills with a diameter of up to 3 mm. The smallest homemade drill Can work with drills with a diameter of 0.7 mm.

The quality of the drill’s operation depends on the quality of the chuck and the attachment of the drill to the motor.

Therefore, the choice of clamp should be approached with all responsibility. And if a high-quality device cannot be found, it can be manufactured quite simply. In this case, you will not need to use lathe. To make the clamp you only need an M8 screw and a closed M8 nut.

Making a collet clamp for a mini drill:

1. We drill a hole with a diameter of 2 mm in the screw head;
2. We take a hacksaw and apply two axial cuts to the screw body;
3. In the closed nut, drill a hole with a diameter of 2 mm exactly in the middle;
4. Using a larger drill, expand the hole in the closed nut to 3.5 mm;
5. We make a cone out of the nut by connecting it to conventional drill and grinding with sandpaper.

The collet is ready! Now you can insert a drill of a suitable size into the bolt and screw on the nut. To make using the drill convenient, you can make a collet for each micro-drill. A special drill stand will also help you do quality work.

Do-it-yourself drill for small jobs

The drill has long ceased to be exclusively professional dental instrument. Today, a drill with a flexible shaft is actively used to perform small decorative works, grinding, polishing, cutting various products.

You can make a rotary drill with your own hands, similar to a mini-drill.

At the same time, it should be taken into account that for quality work homemade products will need a fairly powerful motor. So, an 18V motor from a screwdriver is perfect for powering drills. The easiest way would be to make an engraver from an old blender.

To make a drill you will need:

1. Disconnect top part blender from the worker;
2. Using a utility knife, remove the rubber cover on the button and use a screwdriver to unscrew the bolts located under it;
3. Using a screwdriver, from the side of the power cable, pry up the top cover of the case and carefully remove it;
4. Remove the circuit connected to the power cable from the blender body;
5. Remove the plastic part located above the rotator from the housing;
6. Remove the plastic tip from the electric motor shaft;
7. Measure the diameter of the shaft with a caliper (if you don’t have one, a ruler will also work for this purpose);
8. Clean the electric motor housing from oil and degrease its surface using an alcohol wipe;
9. Place a collet chuck of the appropriate size onto the shaft;
10. Replace the power button with a push mechanism that controls both turning the device on and off;
11. Assemble the blender.

Parts for making a drill can be found at a flea market

The hand drill is ready! Such an instrument will be powered through power cable with a fork. You can power the tool with batteries, but then the batteries will have to be changed or charged from time to time.

Do-it-yourself flexible shaft for a drill

If you need to transfer the rotation of the motor of an engraver, drill or bur to an attachment, then you will need a flexible shaft. This device consists of a wire enclosed in flexible armor, twisted in several layers, and

can significantly expand the functionality of a rotary instrument. You can assemble the flexible shaft yourself.

For this you will need:

• Brass tube;
• Two M4 threaded bushings;
• Electrode shaft (diameter 5 mm) with M5 thread;
• Adapter from internal thread M5 and external thread M8 to 0.75;
• Mini quick-release chuck;
• Clamp made from an M12 bolt drilled along the axis;
• Protection for connection.

Assembling the flexible shaft. To do this, insert into brass tube shaft from the electrode and put M4 bushings on both sides of the tube. On one side of the tube we screw an adapter onto the sleeve, and onto it a mini-cartridge. WITH reverse side tubes we place a clamp with which we connect the shaft from the electrode to the flexible one. For convenience, you can sand down the heads of the screws on the clamp. We put a special brass protection on the clamp and secure it with fasteners. We isolate the connection. The flexible shaft is ready! For convenience, a clamp with a plastic handle can be placed on the cartridge side.

How to make a dynamo from an old printer motor

A dynamo is a device that converts mechanical energy into electrical energy. The operation of the dynamo is based on the principle of electromagnetic induction. That is, an electric current arises in a closed circuit of a device when the flux of the magnetic induction vector penetrating the circuit changes over time.

In other words, a dynamo is simple generator DC.

In everyday life, a dynamo can be used to charge audio and video equipment, a smartphone and other low-power gadgets (for example, fitness bracelets, tablets, a toy robot, etc.). In addition, the device is perfect for powering bicycle headlights, LED strips, hand-held flashlights and other devices powered by single-phase networks.

To assemble the homemade product you will need:

• Motor (electric motor) from an inkjet printer;
• Belt and gear from the same device;
• Handle with comfortable, non-slip grip;
• Two small wooden bases;
• Four 10,000 µF capacitors;
• Diode;
• Metal corners and fasteners;
• Wires and solder.

Before making a dynamo, it is worth drawing it on paper

Making a dynamo is quite simple. To do this, you need to connect the capacitors in parallel, output the phase from the capacitors through a diode to the electric motor, and connect the zero of the capacitor through a jumper to the zero of the electric motor. Wires for connecting electrical appliances should be routed from the capacitor connected to the diode, observing the polarity. After this, you should place the entire structure on the base, fastening the electric motor to the second wooden plank so that the pulley sticks out of it. On the pulley side, place the gear with the handle and cover them with a belt.

DIY micromotor

Micromotors have found wide application in the construction of small flying objects (for example, models of microhelicopters and airplanes). The micromotor itself is a brushless DC micromotor.

You can make a micromotor from an electromagnet from the vibration pad of an old mobile phone.

For the rotor axis, you can use a drill with a diameter of 0.29 mm. To make a motor, you need to carefully wrap copper wire around the drill in two passes. The length of the winding should be several mm longer than the length of the electromagnet.

After this you need:

• Apply to winding thin layer epoxy resin for gluing metals, and put an electromagnet on it;
• Make two bushings from fluoroplastic and put them on the electromagnet on both sides;
• Place the structure on the guides under the winding and wrap it with copper wire.

The micromotor is ready! All that remains is to install valves on it and connect it to power via a microchip with 5 inputs. Manufacturing Instructions interesting crafts from motors Roman Yursi offers on his channel.

DIY drill (video)

Household electric homemade products are a guarantee of the reliability and durability of power tools. In addition, this is a good opportunity to save money, because, often, the assembly of household tools requires a minimum of parts that can easily be found in everyday life or at the nearest store. Use the instructions presented in the article, assemble rotary household electrical appliances with your own hands, and enjoy their quality and affordability!

6watt.ru

How to make a collet chuck with your own hands?

The problem of consumption or lack of collet cartridges is especially familiar to jewelers. Specialists involved in the manufacture of printed circuit boards also face this problem.

Collet chucks can be created independently from available materials. However, there are some nuances that will be covered in detail in the article below.

Drill: adapters for drills of different diameters

It should immediately be noted that manufactured on a quick fix the collet will not be dismountable. That is, strictly speaking, removing one drill from it and inserting another will not work. For this reason, the manufacturing method is more suitable for those who need to create a large number of identical holes.

So, to create a homemade collet chuck we will need:

• drill;
• blank;
• steel wire;
• soldering flux;
• hoop.

Initially, you should wind the steel wire around the blank in the form of a rigid spring (the half rings come as close to each other as possible). Next, the resulting structure must be thoroughly soldered.

It should be remembered that the diameter of the drill must match the diameter of the motor shaft, which will rotate the drill in the future.

Special jaw: a modern replacement for any collet chuck

Today, anyone can easily purchase a special cam for any type of drill. This can be done both in construction boutiques that offer equipment for sale, and on the Internet (at auctions such as Ebay or Amazon).

Such a cam will screw onto threaded connection rotating device shaft. The more tightly the cam is twisted, the more firmly it compresses the drill placed in it.

The price of such a device does not exceed sixty rubles. Purchasing a cam will forever save you from searching for suitable collets for using various drills.

Of course, it is better to purchase a cam made of high-carbon, durable steel. To tighten it, it is recommended to use a special wrench, which is included in the kit.

See also:

Technical consultant Anton Pankratov will demonstrate the above-described technique for making a homemade collet chuck in a video:

euroelectrica.ru

Assembling a mini drill

Mini drill - indispensable tool when working with printed circuit boards. In the store wide range these devices, but it’s not difficult to make them yourself, because everything you need for this can be found in any home. You will need:

1. A motor from a car radio (suitable for a hair dryer or children's toy);
2. Chuck or collet (drill clamp);
3. Power supply or battery;
4. Housing made of plastic or metal;
5. Hot melt adhesive or cold welding;
6. Drill;
7. Wires.

Assembling a mini drill + (Video)

First of all, you need to attach a cartridge or collet to the motor shaft. To do this, before buying a collet, measure the motor shaft, they come in two sizes - 1.5 and 2.3 mm, and buy the corresponding part. To avoid unnecessary vibration, secure the cartridge with hot glue. When using cold welding, work very quickly; it hardens almost instantly.

In the prepared case (for example, a plastic cylinder with a lid), cut off the bottom; here you will need to insert a motor. Make holes in the cover for the wires to exit. If this is a body from a lantern, then this ideal option with ready-made output points.

When you have placed the motor with the cartridge in the housing, check whether it sits tightly there, because during operation the slightest vibration will affect the quality. If necessary, apply glue or cold welding.

Solder the lead wires to the power supply or battery, be sure to insulate the connection points. For ease of use, you can solder a switch button into one of the wires. On this side, the flashlight housing has another advantage - there is a ready-made hole for the button.

If the drill turns in the wrong direction, reverse the polarity of the wires. In case of strong vibration, check the tightness of the collet or chuck.

Mechanical mini drill + (Video)

If, in addition to electronics, you are also interested in fishing, then you probably have an old fishing rod with a spinning reel in your house. This will serve as the basis for a mechanical mini-drill.

First, remove the spool from the reel; it is secured with a screw on the shaft. Next, measure the length of the shaft and compare it with the length of the chuck hole. If the shaft is longer, cut it to fit the chuck hole. Place the chuck (or collet) onto the shaft using hot glue or cold welding.

For ease of work, all that remains is to redo the reel handle; it is quite long and will interfere with the speed of drilling. Saw off part of the long elbow of the handle, and attach the handle itself to the remaining segment. It is fastened quite easily with a riveted metal pin.

Yours mechanical drill ready to go.

Another modification of the mini drill

Let's consider a version of creating a mini-drill with your own hands using an antiperspirant container as a body. To begin, select a motor that is suitable in size; a cassette from a tape recorder is the most best option.

Cut a hole in the body for the button (use a switch from an old carrier as a button), cut off the bottom and make a suitable size outlet for a cartridge or collet in the lid.

Insert the motor into the housing with the chuck attached and wires to the cut bottom. If you match the dimensions of the motor to the dimensions of the body, you will not need glue. Put on and screw on the cap.

All that remains is to connect the button and the power supply. After all the circuits are closed, secure the button in the hole made.

DIY materials for a mini drill

There are many alternative options use your inventive abilities to create a mini drill with your own hands. The reasons for creating such tools can be:

• DVD drive;
• Motor from an old electric razor;
• Electric toothbrush;
• Glue gun handle with suitable motor;
• Non-working screwdriver;
• Motor washing machine;
• Old hairdryer;
• Plastic pipe.

All these seemingly unnecessary little things can serve well and become the main detail for creating the necessary tool.

Important! When working with a homemade mini drill, try to keep the drill perpendicular work surface. This will protect the drill from breakage and extend the life of your device.

How to make a chuck for a mini drill + (Video)

For a homemade cartridge, you will need a piece of metal or textolite pipe, the diameter of which matches the motor shaft. The length of the homemade bushing should be at least 2 times the length of the shaft and allow the drill to be securely secured.

The sleeve can be secured using screws or hot glue. As a rule, the motor shaft has a diameter of 2-5 mm, and drills for making circuit boards have a smaller diameter. This means that you need to fill the resulting space with filler and achieve alignment between the drill and the shaft.

As a filler, take rosin and pour it into the hole in the sleeve. Melt the rosin with a soldering iron and insert the drill. The rosin will harden and hold it securely.

To achieve perfect alignment, melt the rosin again and turn on the power. While the rosin has not hardened, try using tweezers to correct the position of the drill. If necessary, repeat the operation again.

instrument-blog.ru

How to make a mini drill for printed circuit boards with your own hands

The main purpose of a mini drill is to drill printed circuit boards, plastic, wood and some other non-hard materials. Compactness and efficiency have allowed this tool to become one of the main assistants for the home craftsman. Moreover, it is not at all necessary to buy a ready-made tool - a homemade mini drill copes with its duties no worse than its factory counterpart.

What can be made from

You can make a mini drill with your own hands by using motors from various improvised means.

Device manufacturing algorithm

The collection takes place in 3 stages. Let's take a closer look at each of them.

Making a mini cartridge

In order to assemble a mini drill chuck, you need to purchase a collet - a special mechanism designed for clamping cylindrical objects. Next, you need to connect the motor to the contacts of the future battery, which will power the device during operation.

Collet clamping

If your drill is spinning in the wrong direction, swap the location of the wire contacts.

Finding a drill of the right size is not difficult. Insert the drill into the collet body and clamp tightly. Next, the finished nozzle must be installed on the motor body. The collet should fit tightly onto the motor shaft. Otherwise, you cannot avoid vibration. The chuck for a homemade mini drill is ready.

Attachments for a homemade mini drill can be purchased at any hardware store. Before purchasing, make sure they match the diameter of the collet.

Preparing the body

As a housing for the future device, you can use either an antiperspirant container or an ordinary hollow tube of a suitable size. If you use a simple hollow tube as a body, you need to cut off the bottom and insert a rubber or other plug in its place. If you are making a device from an antiperspirant body, you need to drill a hole in the lid for the drill to exit.

Connecting the elements

The motor must be installed on the reverse side. If your motor is not the right size, choose another tube. The fit must be very tight to avoid vibration as the shaft rotates. After this, it is enough to tighten the bolts on the collet and connect the resulting device to the electrical network.

One of the main disadvantages of assembling a drill with your own hands from a motor is the lower power compared to a standard device and the low strength of the drill.

If your work requires a cutter, you can easily make it yourself from old lighter. To do this, remove the spinning drum from the lighter and place it on a bolt of a suitable size. Secure this with a nut and insert it into the collet hole. The cutter for surface treatment is ready!

If for some reason the cartridge does not fit the size of the cylindrical shaft of the motor or reel, it is necessary to degrease it well and then seat it on hot glue. This will help to obtain a stable and robust construction.

This mini drill with purchased attachments can perform minor repairs. technical means, drilling plastic, thin metal and making crafts.

Quite by accident I noticed that the length and inner size plastic stopper from glass bottle match the length and outer size of the electric motor from an inkjet printer, which has long been aspired to become a . On the first free evening, I disassembled the plug (it’s easier to have and use two - we break the body of one and take out the inner part, in the second, on the contrary, we save the outer part when disassembling) and adding everything with a front fastening washer, a “tulip” connector and wires, I got the following design:

Which I assembled into a single whole using two screws and three small self-tapping screws.

Adding to this a power supply wire and a specially purchased collet for attaching drills with a diameter of 0.7 to 1 mm. But the seller’s assurances did not come true; the drill collet did not fix a diameter of less than 1 mm.

However, the prospect of “bending” under the pressure of circumstances is not very attractive, and therefore, having strained my brain, I decided to try the following:

The diameter of the “nose” of the syringe on which the needle is installed is slightly smaller than the diameter of the electric motor shaft (2.5 versus 3.2 mm), but the problem can be corrected.

I took a 3 mm drill, increased the diameter, cut off what was needed from the body and forcefully pressed it onto the shaft... and nothing happened. The needle did not fit in place, the centering of the mounted element did not stand up to criticism.

Then I took drills of the following diameters - 2.6 mm, 2.8 mm, 3 mm, 3.1 mm and, with their help, enlarged the hole gradually and with inside housings.

I slightly modified the hole with a round needle file.

With a little effort, I put the adapter on the shaft and carried out external finishing.

He heated the medical needle over the fire and pulled it out from the installation site with pliers.

The diameter of the extracted needle, 0.7 mm, corresponded to the diameter of the drill being installed, but its shank entered the resulting hole only after applying quite sufficient force.

The next drill had a diameter of 0.8 mm; a needle with a corresponding diameter of 0.8 mm was also found for it (plastic blue), but for a drill with a diameter of 1 mm there was no suitable needle and the hole from the 0.8 mm needle had to be drilled out with the same drill. However, installing it using pliers also required some effort.

Video

There is no runout of the tip of the drill, the adhesion of the drill mandrel with the adapter on the shaft is sufficient even to easily drill a 17 mm chipboard, and the mandrel with the drill can be easily removed if it is pryed off with a screwdriver. Well, why not an alternative to a collet clamp (I’m still silent about the lack of financial costs). In general, another application in amateur radio practice medical syringes, and first of all already used, came up with (I hope this is so) Babay from Barnaula.

Discuss the article HOMEMADE DRILL HOLDER

Collet chuck is a type chuck. Designed for clamping cylindrical workpieces with smooth surface. Used for drilling, drilling and filler, milling, lathes and numerically controlled machines. The main element of the collet is a sleeve with longitudinal cuts. Between the cuts there are elastic petals that hold the material when compressed. Usually one cartridge is sold with a set of collets different diameters.

The cartridge consists of three parts - a body, a replaceable sleeve (collet) and a clamping nut. The collet has several axial slots dividing it into petals. The number of petals varies depending on the diameter of the sleeve. The material is held in place due to the fact that the locknut transfers pressure to the conical formation, and the part is compressed by radial force. There are replaceable collets for fastening cylindrical parts, as well as polyhedron-shaped workpieces. The collet chuck is installed on the machine shaft.

Depending on the purpose, collets are divided into three types:

• Feed collet. It is a hardened steel bushing with three partial cuts. The petals are directed towards the center and are springy. The hole in the feed collet is selected with such a diameter that the part is clamped tightly. Equipped with a set of replaceable inserts, making it possible to clamp parts of different diameters and profiles.
• Clamping collet. It is a sleeve with a through hole. Two attachment points are formed along the axis. The material installed in the collet is firmly fixed and held during operation. For square parts, a clamp is made with four slots, for round and hexagonal materials - with three. With a set of collets for different shapes of workpieces, you can fix a part of any shape into a chuck. The advantage of such models is almost zero radial runout.
• Detachable collet. Used when processing parts with small diameters. The cams are moved apart using springs.

Application

Since each collet is designed for only one diameter, they are used when working with long metal rods on milling machines. Also high precision makes it possible to secure taps, cutters and wrench tips. With their help, drills of drilling and filler machines are attached. The inner surface of the collet is polished, so the surface of the workpiece in the places where the clamp is made is not deformed.

In addition to equipment for machine tools, mini chucks are used in construction equipment. There are drills with mini chucks and routers with mini chucks.

Also, using mini self-clamping chucks, they are attached construction tools to the handles. This allows you to make universal handles for several tools. Using a mini chuck attached to the end of the handle, it is convenient to change the shafts of files or screwdrivers.

The same principle is used to clamp the graphite rod in mechanical pencils. When you press the pencil button, a mini collet extends, the petals diverge to the side and the rod reaches the required length.

Advantages and Disadvantages

To understand whether such a cartridge is right for you, it is important to understand its features. Self-clamping chucks have a number of advantages:

• Easy to install and dismantle the workpiece. There is no need to own a set of additional tools - pins, stoppers or clamps with keys.
• Clamping of small diameter parts.
• Long period of operation. Due to the fact that collet chucks are made of hardened or cemented steel, they have greater strength.
• The large contact surface area prevents the workpiece from spinning.
• Minimal beats. In self-clamping bushings the part is well centered. This allows you to increase the accuracy of material processing. Mini vibrations of the material are usually neglected.
• Versatility. Suitable for almost all types of machines.

The main disadvantage is that one collet clamp holds a part of a certain size. Therefore, it is advisable to own a set of interchangeable collets and select them for each workpiece. Adapter bushings are also used to solve this problem. They also have petals, but the shape of the bushings is cylindrical. The sleeve is installed inside a collet of the appropriate size, and a workpiece is inserted into the hole of the adapter sleeve. The clamping nut is tightened and compresses the collet, and the adapter sleeve inside it is compressed and holds the part. With a set of interchangeable collets or adapter sleeves, the self-clamping chuck becomes an indispensable mechanism for the machine.

Self-production

Making a collet chuck with your own hands is not easy. To do this, we grind three main parts - the body, the collet and the locknut. 50HFGA steel is best suited for this. For manufacturing you need to own a set of tools and a milling machine. A homemade cartridge is not inferior in quality to factory analogues.

A cylindrical blank of a suitable size is selected for the body. It is drilled along the axis through hole, a thread is cut inside to secure the machine spindle in place. After that homemade body installed directly on the machine shaft. Grinded inside conical shape under scurvy. Then a thread is cut from the outside for the securing nut.

The lock nut is made next. A suitable blank is fixed in the machine tool chuck. We make a through hole, bore the internal cavity and cut a counter thread inside of the same diameter as on the body.

The most difficult thing to do is the collet. The workpiece needs to be sharpened and a hole made using a drill. After this, a cone-shaped part is turned out, and slots are made on it with a diamond-coated disk.

A homemade cartridge must have parts of the most accurate dimensions. All internal surfaces must be sanded. You can make a knurl on the outside of the locknut, then you can install the workpiece yourself.

If possible, you need to harden all parts of the cartridge. Otherwise, the homemade cartridge will not last long. If hardening is not possible, the collet can be made of brass or bronze. These collets must be used with caution.

If accuracy is important to you when working on a machine and the size of the workpiece rarely changes, then a collet chuck is ideal for you.

The main advantage that a self-assembled mini-drill differs from standard products is its compact size and the ability to obtain electrical equipment without significant expenditure of money, effort and time. Make one like this homemade instrument easily at home, since this does not require special skills or highly complex devices. To get a high-speed drill or other devices for making crafts, home handyman you just need to be “friendly” with pliers and be able to perform simple technical operations.

Instructions for making a drill

When making small things, decorative and other products, a compact drill, engraver and the like hand tool very convenient, so it remains indispensable in the home workshop. Using such equipment, you can drill and process products made of wood, plastic, textolite and other durable materials. You will also need a micro drill when drilling printed circuit boards.

To manufacture drilling equipment, select a suitable chuck and a body of suitable dimensions ( plastic container). To rotate the working surfaces, you need to select electric motor and a power supply, for which you can disassemble old hair dryer or other electrical equipment.

To learn how to make a mini-drill, just read the following list of recommendations:

• You first need to secure the cartridge to the electric motor shaft, for which you will need adhesive materials (“cold welding”), which ensure a reliable connection between the metals.
• You will have to work very carefully, since the adhesive materials set quickly, which eliminates the possibility of eliminating errors and correcting the connection.
• After fixing the cartridge, it is better to cover its surface with a special heat-resistant glue, which will ensure the density and strength of the connection.
• On the case you need to make a hole in advance for the switch (preferably a push-button one).
• The drill will be more functional with a reverse mechanism, which is implemented using a six-pin switch.
• When connecting to power, you will need a 12 V power supply or a battery (2-3 pieces) of the same voltage.

Having assembled a mini-drill into a single structure from individual parts with your own hands, you can turn on the power and do test drilling.

Assembling the collet chuck

To secure drills in a drill, you will need a special collet or chuck in the form of an adapter with clamps for drilling tool. This mini drill chuck is attached directly to the electric motor shaft. A self-made collet clamp allows you to work with drills with a diameter of 0.7 to 3 mm. The more carefully and accurately this element is assembled, the more accurate the drilling will be.

It is important to choose the right cartridge, so if it is impossible to find suitable option better take it on self-production. You don't need a lathe for this, because you just need to select a screw and a closed nut with an M8 thread. When assembling the cartridge, proceed in the following order:

• Drill a 2mm hole in the screw head and nut.
• Make axial cuts with a hacksaw.
• Enlarge the holes with a 3.5 mm drill.
• Grind the nut until it has a cone shape.

Having thus assembled a mini-chuck for a drill with your own hands, you can begin installing it on the drill. If necessary, select similar chucks for drills of any diameter.

DIY mini drill

Drills are used by modellers, home craftsmen and those who love making small parts or decorative elements. The presence of a flexible shaft in such a device allows you to work with the most small details and treat surfaces complex shapes(grinding, polishing, cutting, applying patterns). Assembling such a machine is as simple as making a drill with a mini-chuck for drills with a diameter of up to 3 mm. To do this, you need to find the main component - an 18 V electric motor, which can be taken in a screwdriver or blender.

The procedure will be as follows:

• Disassemble the blender by removing the top cover and cover, unscrewing the mounting bolts.
• Remove the electrical circuit, power cable and the part located above the rotator from the housing.
• Remove the tip on the electric motor shaft, remove dirt from the housing and shaft.
• Select the cartridge according to the shaft size (the most accurate way to measure the diameter is with a caliper).
• Secure the microcircuit and the on/off mechanism.

The assembled instrument can be connected using a cable to a regular outlet. Rechargeable batteries or regular batteries are also suitable as a power source, which will have to be replaced periodically.

Flexible shaft for Dremel or micro drill

Transfer rotation to replaceable nozzles possible using a device such as a flexible shaft made of durable twisted wire with a protective metal coating. For self-assembly This device will need a few simple things:

• brass or copper tube;
• bushings with metric thread M4 (2 pcs.);
• metal shaft made of 5 mm electrode (M5 thread);
• adapter for thread 0.75;
• mini-chuck for quick fixation of the cutting tool;
• metal clamp (M12 bolt with a hole along the axis);
• protective coating at the connection point.

To assemble a flexible shaft, an electrode is placed in the tube and secured with bushings. On one of the bushings you need to attach an adapter with a cartridge, and on the other, install a clamping device for connection with the flexible part. After all these operations, the protection made of brass or copper is secured. The chuck is equipped with a plastic handle on the clamp, which simplifies the work with the tool.

Dynamo from printer drive

You can make a micro-dynamo yourself if you disassemble a used printer. This portable device will be able to convert mechanical rotation into electrical energy, which occurs under the influence of magnetic induction in a closed circuit. This homemade product allows you to get a simple DC generator at home, which is useful for powering small electrical appliances, charging mobile phones, tablets and other equipment. A small dynamo can also be used to LED lighting, bicycle light with connection to a single-phase circuit.

Just like a bur or a do-it-yourself microdrill, a dynamo is assembled from improvised materials that can be found at home. An example kit looks like this:

• electric motor;
• belt drive;
• non-slip handle;
• base made of wood or other durable material;
• capacitors with a capacity of 10000 μF (4 pcs.) and a diode (1 pc.);
• wires, fasteners, metal corner.

The only condition for successful assembly of the dynamo is the selection of suitable sized and fully operational components. All the parts needed for this can be found in any home printer. Before assembling the dynamo, it is better to make a drawing in advance and get a clear idea of ​​​​the location of each element.

The device is assembled in the following order:

• Connect capacitors in parallel.
• The phases are connected to the electric motor through a diode, and the zero is connected to the motor zero.
• Secure the device to the base.
• Install the gear with the handle.
• Tension the drive belt.

When assembling the structure and connecting the contacts, polarity must be taken into account.

Micro motor at home

Compact electric motors are used by modellers and lovers of various small crafts with electric drive. Such a device is the most common DC electric motor with a brushless circuit. To make this device, a vibrating platform from a mobile phone is suitable, and as a shaft you can choose a thin drill (up to 0.29 mm), on which copper wire is wound in two layers.

The procedure for manufacturing an electric motor is as follows:

• Coat the winding with epoxy.
• Fix the electromagnet.
• Attach fluoroplastic bushings to the electromagnet.
• Install the entire structure under the winding.

To be fully ready, you need to mount the valves and make the connection using a five-input microchip.

A description of what can be made from a drill or an old printer will help you assemble quite complex devices at home that are needed by craftsmen, model makers and just lovers of crafts. Knowing how to make a collet clamp with your own hands or make an electric motor, you can save a lot, because all these products are made from used devices and parts. All costs are reduced only to the time allocated for assembly.

Collet chuck – special device used for clamping a tool when performing turning, milling, drilling and other operations related to the processing of metal workpieces based on the technical specifications (sequence of operations performed, processing technology, attached sketch of the product).

Types and principles of operation of chucks

Collet chucks are mainly used when processing cold-rolled rods or other metal products having an already treated surface.

Structurally, cartridges can be classified according to functionality:

• with a fixed mechanism;
• with retractable mechanism;
• with retractable mechanism.

Each design has its own characteristics. The feeding type is made in the form of a steel bushing with 3 cuts forming petals that have a springing effect.

Drawing No. 1 of the main spindle collet

Collets type F - clamping the main spindle are used to secure the workpiece.

Drawing No. 2 of the counter-spindle collet

Collets type LN - counter spindle are produced elongated, size E depends on the standard size.

Drawing No. 3 collet type R

Type R – are pull-type collets.

Drawing No. 4 collet type T

Type T - clamping.

Drawing No. 5 collet BF

BF type feed collet - designed for bar feeding.

When installed on the machine, the feed collet is threaded onto the pipe with the help of which it is fed into work area. It is necessary to take into account the design feature - the size and shape of the collet, which must necessarily correspond to the profile of the bar being processed.

In preparation for processing, the rod moves through the petals, which due to design features hold the workpiece tightly. During processing, when feeding the workpiece, the adhesion force between the petals and the product increases due to rotation. Operating principle clamping elements is based on strengthening the adhesion of the petals to the workpiece during rotation of the working mechanism. Bushings with 3 petals are used for processing products up to 3 mm, four – up to 80 mm, six – over 80 mm. Typically, collets have an angle at the apex of the cone equal to 30º.

When processing thin rods, collets equipped with springs are used to increase the clamping force of the jaws. When increasing the diameter of the workpiece being processed, designs are used that are equipped with special inserts selected according to the dimensions of the product. Collet clamps are also used when machining with a drill, cutter or tap. The sleeve is fixed in the cartridge using a nut, and cutting tool directly in the collet. When fixed with a nut, the internal volume of the hole where the workpiece is installed is reduced, thereby increasing the force holding the rod stationary.

Cartridges of this design also have their drawbacks. First of all, the requirement that the shanks of the tool used must match the characteristics of the collets used. At enterprises, the most widely used collets are the ER type, which constitute the largest number in the total volume of tools used.

When executing complex work for the manufacture of products, various collets are used, indicating all sizes and technologies for performing work operations, but often you have to combine equipment or make the necessary collet chuck with the required characteristics with your own hands.

Video review of a lathe collet chuck

How to make your own collet chuck

When making various products with your own hands, situations arise when the available equipment does not allow you to perform the necessary operations. It is required to produce a collet chuck that meets the requirements, with the product being manufactured according to the developed sketch.

All work must begin with the preparation of a sketch with the elaboration of all the necessary details. The sketch of the chuck allows you to take into account all the features when making the necessary equipment and clamping mechanism with your own hands.

When making collets with your own hands, you need to consider several features:

• the internal diameter of the collet is equal to or less than the minimum diameter of the part;
• in a collet, an increase in the internal diameter is possible due to the expansion of the petals;
• to increase the production of adjustable collets after setting and raising quality characteristics additional grinding of the conical and guide parts of the collet is necessary;
• it must be taken into account that during long work The elasticity of the collet petals is lost, which can result in breakage.