How to make a grinder from an electric screwdriver. Grass trimmer or lawnmower – to convert an electric screwdriver

How to make the simplest grinding machine on the basis of a drill

In the absence of a sharpening machine, many elementary tasks have to be done longer than is possible with his. If you are faced with the need to buy a sharpener, but you have a drill, then simply make it on its basis. This is a very simple and fast solution, with almost no cost.

  • Bar 50×70 mm, 50×50 mm;
  • M10 bolts with wing nuts and washers. 2 pcs.;
  • M6 bolts with wing nuts and washers. 4 pcs.;
  • 20 mm plywood;
  • 25×25 mm steel angle;
  • self-tapping screws;
  • disc with velcro under the sandpaper.

Preparation of materials for angle grinder

To make an angle grinder with your own hands, you will need a small motor. Get such a motor from an old printer. You can also use any other motor, 9 or 12 volt.

You will also need a piece of sewage pipe at 50 mm, and two plugs, 50 and 110 mm.

To connect the motor to the plug, you need to make a piece of thin metal angle, with which you could screw the motor to the plug.

To turn on the motor will need a small button. And to connect the button to the motor, two pieces of thin wire, tin, and a soldering iron. You can also use a gas torch.

Making a grinding machine with our own hands

The process of creating a machine tool consists of creating its structural elements, and each creation of each element we will analyze in detail, dividing into successive technological operations. For each operation we will attach a photo, and at the end of the article we will put a video of the whole process of creating a grinding machine with their own hands.

The base (frame and spindle box) of the machine

As noted earlier. this machine tool is made on the basis of an existing (previously created) drilling machine, so, not to duplicate information, we suggest you read the technology and process in the article, it is described in detail. So we think that the frame and the spindle box are ready. Here is their appearance.

The sanding table

The grinding table has an inverted U-shaped design and is fairly easy to make. It is necessary to saw the following blanks:

The part Width x Length x (Height) Material
Side panel 120 х 120 10 mm plywood
Bottom 120 х80 10 mm plywood
Rigidity elements 120 x 25 x 20 Solid
Guide 200 x 30 x 40 Solid
Tabletop 200 х 200 Plywood 10 mm

Then assemble the table base. To do this, we fix the side walls in the end face of the table underside with self-tapping screws. The result is an inverted “U-shaped” construction.

Then we fix the table top to the stiffeners with self-tapping screws.

Now it is time to install the rail. It is a strength element, so you need to put glue on the joints and use self-tapping screws to hold them in place.

You should get such a design.

Then you need to set this table on the base with the clamping elements (simply put, a board with a bolt in the center).

Install them from the bottom of the base, bolt upward. We set the grinding table on the base (guide down) and fix it with nuts.

How to make an angle grinder from a drill or electric screwdriver

angle grinder from a drill is easier to make than the other way around. Angle grinder or angle grinder (angle grinder) has become an indispensable power tool because of the wide range of works that can be performed with it, but it has its own drawbacks, which interfere in the work.

With its help it is not always possible to get to hard-to-reach places, and it often has a high unregulated speed, by the way, because of this increased safety measures are required.

But despite all this, it is irreplaceable for certain types of work. In this article, the master plumber will tell you how to take advantage of all the advantages of the angle grinder, yes, still get around its disadvantages.

  • The rest of the disk of an angle grinder.
  • Bolt.
  • One washer sized to match the inside diameter of the angle grinder disc hole.
  • Two washers with a diameter larger than the inside diameter of the bore of the angle grinder disc.

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Unscrew the disc. As you can see it should not be completely ground. If you do not have an angle grinder. Ask your neighbor or a nearby repair shop, they throw out such discs anyway.

Put a large washer on the bolt. It does not have to be rectangular. Since it is hard to find large diameter washers, I used what I had on hand. The outside diameter of the washer must be larger than the disk mounting hole.

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Then put the disc on the bolt. To make sure that it is perfectly centered, put a washer with a diameter roughly equal to the diameter of the attachment hole of the disk.

Ideas on what you can make from an old electric screwdriver

The availability of an electric screwdriver inspires many craftsmen to create additional devices and tools based on it. The imagination of the “hobbyists” is limitless. Equipment for the carpentry workshop. lathe, drill, milling machine, drill and angle grinder, mechanical saw and nutrunner.

Even children’s vehicles. electric cars and snowmobiles. are not left aside. What to say about the household appliances. grass trimmers and lawn mowers, and even a boat engine. The most amazing thing is that all of the above “homemade”, made by their own hands, working on the basis of an ordinary old electric screwdriver and a talented design solutions home craftsmen.

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A circular saw or an angle grinder

The design of an electric screwdriver allows you to turn it into a circular saw (angle grinder). However, due to the low power of an electric screwdriver, this “circular saw” is rarely used for small jobs. to cut fiberglass reinforcement, steel chain or a drill stuck in the ceiling to drill concrete slabs, steel bands of small thickness.

Bolt, nut and two washers allow you to clamp a small disc for working on metal. that’s all you need to turn an electric screwdriver into an angle grinder.

Of course, such an invention has a right to life, especially when the master is not able to afford the entire range of production cutting tools.


Excellent balance, good cutter visibility during handheld milling.

  • To install the supplied 8 mm collet, first remove the 12 mm collet from the nut and then insert the 8 mm collet into the nut; we would like each collet to have its own nut.
  • The hole in the foot makes it difficult to use routers with a diameter larger than 63 mm.
  • The speed controller with numbers from 1 to 5 doesn’t let us know the real speed. You have to figure it out from the table in the manual.

Although the motor of this cutter lowers smoothly, its fixation is forced by turning the lever. This is less convenient than the Bosch and Porter-Cable 7539 models.

The disadvantages of such nozzles

There is a small spoon of tar in wood sanding with a drill, or rather, two spoons:

When working at low RPM processing efficiency is also low, and at high RPM there is a high probability of damaging the workpiece, so you need to carefully check the RPM of the drill; when using the lobe nozzle if you are not careful there may appear on the wood surface cross lines, which are then hard to remove, and if they are left, they will stick through the varnish.

Therefore, it is better to perform the bulk of work with the help of nozzles, and to perfect it manually. After all, the wood likes manual labor. even Pinocchio will confirm it.

If you try, you can make and homemade nozzle, but it will be quite a troublesome process.

Besides with his own hands are unlikely to succeed to make petal nozzle, and spend time on making a flat stupid. it costs her inexpensive, so the purchase of firm nozzle not too hit on the Therefore, wood sanding with a drill, if and should only be performed with a quality and proven tool.

  • The rest of the disk of the angle grinder.
  • Bolt.
  • One washer the size of the inner diameter of the bore of the angle grinder disc.
  • Two washers with a diameter larger than the inside diameter of the bore of the angle grinder disc.

Turn the angle grinder gearbox into a tool

The first thing to do is to separate the gearbox from the rest of the body of the grinder. This is not difficult to do, it is usually square in shape and screwed on the corners. This department may need to start dismantling the electrical part of the tool, remove the brushes, the starter button, and then the rotor with the shaft and gearbox.

The gearbox needs a complete revision. Disassemble it completely, removing all retaining rings and gaskets. If necessary, replace the bearing, it most often fails in this tool. The reason is the tripping of metal elements at high speeds and the ingress of micro-particles into the grease and then into the bearing housing. There are two elements in this bevel gear. the drive pinion (small, located on the shaft) and the idler gear (wider, located in the gearbox itself). Through the difference in the number of teeth the gear ratio is set and the speed of rotation of the gearbox shaft is adjusted. Dismantle the drive pinion by unscrewing the nut on the rotor shaft using a suitable wrench.To make our attachment work we need a 7-8cm long piece of shaft. It may be necessary to cut off a part of the rotor case for this purpose.

When all the components are ready you can assemble the gearbox with the rotor shaft piece. Put the pinion gear in its place on the rotor shaft and tighten it with a wrench.

Connect the air separation gasket and the gearbox housing with four screws, which are then cut to length flush with the nuts.

The outgoing section of the rotor shaft needs to be reworked. Clamp the gearbox in a vice and secure its shaft with a clamp. The rotary shaft in turn is ground by an angle grinder to a square shape. It is most convenient to do it with a grinding disk. With a caliper do not forget to measure the accuracy of the size, which corresponds to 6.5 or 9.5 mm (depending on the seating size of the screw heads).

Important! The more evenly the shaft is ground, the more accurate will be its center of rotation, and hence the backlash when rotating the tool will be minimal.The gear head is ready, now we just need to clamp the rotor shaft in an electric screwdriver or drill, and test it in action. The tip of this device, namely the gear shaft, allows you to use it as a nutrunner or a device for tightening screws, screws. It can be used in hard-to-reach places where the body of an ordinary tool does not allow it. That’s it, practical, cheap and uncomplicated!