Greetings to all lovers of homemade products and those who just looked at the site in search of interesting ideas. Today I present to your attention an option for making a belt sander (grinder) from the author of the YouTube channel Workshop Diy. The design is not difficult to manufacture (the level is below average), and if you still watch the video (it will be at the end of the articles), then there should be no difficulties at all. As a drive, he uses a grinder with a speed regulator, but in the future he plans to install an engine. For the manufacture I used various scrap metal, which I found in my workshop. In general, if you are interested in the idea, you are welcome, let's sit down more conveniently and study the article.
* trimming round metal pipes with a diameter of 40 mm (guide rollers will be made of them), < br> * two pieces of a shaped metal pipe 40 mm thick (the diameters of the round pipes and the thickness of the profile must match)
* a car shock absorber,
* a section of a channel,
* 6 bearings for the inner diameter of pipes,
* screws with nuts on the diameter of both inner bearings,
* sheet metal 1.5-2 mm thick,
* profile pipe with a section of 40×20 mm and 50×25 mm,
* metal plate with a section of 40×5 mm,
* three furniture gas lifts.
* measuring and marking tools,
* drilling machine,
* step conical drill
* welding machine,
* open-end or ring spanners.
At the initial stage, the author prepared the details of the rack. I installed round pipes on the edge of a large profile pipe and circled them around the contour. Then, tangentially to the circle on the sidewall, I drew straight lines on the plane of the wide walls from each edge.
Then, holding the workpiece in a vice, I cut off the excess along the lines, as shown in the photo. Then I marked and drilled holes in the resulting eyes. The second workpiece, which is shorter, was processed along the edges in the same way.
At this stage, the author proceeded to partial preparation of the foundation. For him, he used a channel. I attached a large part of the rack to its shelf and outlined the contour of the groove cut in the end. Carved it on the shelf of the channel. On the plane of the channel I marked and cut out a rectangle about 4×2 cm in size.
Then most of the rack, let's call it the main one, the author welded the bases to the shelf, aligning the grooves. Then I prepared a triangular piece from the trim and welded it to the base and and the rack, thereby strengthening the connection.
Now you need to attach the smaller part of the rack to the larger one. For this, I made two lugs from a metal strip 40 mm wide. Through the holes and a metal tube of a suitable diameter, with a bolt and nut, he fixed them on the end of the smaller part.
Then I welded the smaller part of the rack to the larger through the protruding edges of the lugs, in order to weld the part with the desired gap, I used a lining from a pipe of the required thickness.
Since the author plans to use a grinder as a drive, it is necessary to make a mount for it on the base. On another shelf of the base, opposite the rack, I drew a line and, according to the marking, welded a section of a profile pipe 50×25 mm in height a little more than the base. Then I cut out an insert from a 40×20 mm pipe, which will be inserted into the previously welded part.
In addition, I made a plate from a metal strip, according to the size of the gap between the pipes.
I welded a holder for a grinder made of sheet metal to the pipe liner.
Next, the author needed the following set of pipes, bearings and washers, which are shown in the photo below. All videos will be made from them.
The author takes a long section of a pipe of a smaller diameter, makes an incision with a grinder along the entire length and, using a vice, presses the bearings into its ends.
Then he takes a piece of pipe of the same length , but already of a larger diameter, also cuts it along the entire length. In this workpiece inserts a previously prepared part and welds the cut. The seam is cleaned with a grinder. The video is ready. Using the same principle, I made another one of the same video.
Then I prepared more two rollers. To do this, he took a magnet, laid a washer on it, then a piece of pipe and welded it. In the same way, I welded another washer on the other side. Using the same principle, I made another video, they are different in length.
Now it's tedious to make a shaft for previously made rollers. He decided to make it from a part of the shock absorber. With the part that he needed, the author clamped the shock absorber in a vice and cut off the excess with a grinder.
Then I strung a roller with a larger length on the shaft and scalded it. From bearings, rings from pipes and washers, I made two cages, which I then also installed on the shaft on both sides of the rollers. A second roller was fixed at the end of the shaft. Then I sanded the resulting part.
The author fixed the prepared shaft with rollers and clips in the lower part of the base under the stand as follows, the larger roller is located under the stand, and the smaller one under the base made of the channel. The bearings were welded to the rack walls through the cages.
Since the clips are not welded to the shaft, the author screwed a nut onto its threaded part, thereby fixing it.
At this stage, on both parts from above, the author installed the rollers prepared in step 5. He fixes them through the holes with long bolts and nuts. On the smaller part of the rack, a small regulator is welded under the roller screw, I think you understand how it is made. This regulator can further adjust the tension of the sanding tape.
Now you need to expose the smaller part of the rack in the desired position. For this, the author used a gas lift, attached it to the details of the rack and welded it. Now the lateral honor can be lowered to the bottom to fill in the emery tape, and then it (the side part) will rise to its original position due to the gas lift.
The author installed two more gas lifts, or rather welded to the retractable part of the grinder , while this part was in an extended position. Then you will understand what they are for, but I think many have already guessed.
Next, the author prepared the following details, which you lead in the photo below.
This is a support platform made of sheet metal with units for adjusting the inclination along the plane.
These parts are fixed by the author on the base, welding through the adjusting unit.
And a few more final touches. The author has prepared two sections of a profile pipe, these will be the legs of the grinder. Having placed them from below, I welded in this place a stop for the adjusting screw of the support platform.
Step 13 .
This is the final step. At this stage, the author painted his machine and put it to the test. I fixed the drill in the mount and screwed the roller onto its screw. Then this roller was connected to the lower roller on the rack, this is where gas lifts are needed, pressing on the mount it lowers, the belt is installed, then due to the gas lifts, the mount rack returns to its original position, due to this, the belt is tensioned.
< a href = "https://usamodelkina.ru/uploads/posts/2021-07/1626547260_65.jpg" rel = "prettyPhoto"> As you can see, you can grind a pipe on it, sharpen a kitchen hatchet. You can also align the edge, for example, of any sheet blank, by the way, the length of the working part turned out to be 38 cm. Also, if you set the angle of inclination of the support platform, you can sharpen the chisel.
Here's a grinder. And below is a video from the author, watch, delve into and repeat if desired.