Earth drill - what is it worth to start work on?
A qualitatively executed tool allows you to make a necessary hole in a few minutes. Existing industrial designs may not correspond to the specifics of the work: have insufficient working depth, limited choice or small diameter of knives, etc.
The existing industrial hand drill for earth can be of one-piece construction and fixed length, and can be partially or completely disassembled, with extension rods and replaceable cutting attachments. The nozzles themselves are double-bladed or screw-type worm-type. To facilitate the work, knives made of special high-strength structural steels are equipped with side and straight cutters.
Cutting parts are also multi-tiered, starting with blades of smaller diameter and ending with a larger diameter of the nozzles. Those. Buried earthy hand can have a high universality of application by increasing the length of the rod, changing the rotary handles from short for small sizes to long ones for maximum diameters.
More specialized versions are limited to a minimum set of nozzles( usually three), a fixed stem length and a constant handle size. Of course, the cost of universal sets is much higher than the minimum required set.
Probably this also becomes the reason why the careful master thinks about how to make a drill or perfect an existing device of this kind. Perhaps, for example, such a device will be used only to perform non-standard columnar elements of the foundation and therefore it makes sense to make it individually.
How to make a drill - we select accessories and tools
There are no big difficulties in how to make a self-made earth drill. It all depends on the ability to find suitable materials and the availability of appropriate tools. Of course, it is important to take into account the economic feasibility, but, as mentioned above, it may turn out that it is precisely certain properties of the device that will prevail over its value.
As , the necessary equipment will require the most common welding machine( something will have to be welded), an electric drill with a set of drill bits for metal, an abrasive wheel with a drive: some elements( depending on the type of nozzles of the tool) must be sharpened on the machine. Of course, the work will require locksmith equipment( in the minimum volume).
As already mentioned, the drill can be of different configurations. But in the most general case, you need a stock. As it is quite suitable smooth reinforcing bar( or pipe) two meters long. To determine the inner diameter of the pipe, it must be measured on an old drill about thirteen millimeters. The rod is also up to fifteen millimeters in diameter.
A piece of pipe or rod about sixty centimeters will be used as a horizontal rotary handle. For dvuhlopastnyh knives experts recommend to acquire old discs from a circular saw of several diameters. Blades can also be made of steel sheet of appropriate thickness. In this case, it is easier to make the screw shape of the screw.
Hand drill for the ground - we begin to assemble the
The easiest way to make a drill is to weld a horizontal handle perpendicularly to the stem in the middle of its length. Then you need to sharpen the opposite end. For the pipe, an old drill bit welded inside is used, the rod is riveted and ground on the emery. The point can be screwed into shape.
The main thing is that the rod should be screwed into the ground and not obstructed, but rather assisted in the work of the auger part. If you cut a circular disc with exactly the same diameter and sharpen one radius on each half, you get working knives. Since the edge of the disk is notched, the grinding is carried out taking into account the motion along the back of the saw's teeth.
Now it's easiest to weld each half diametrically at an angle of about one hundred and twenty degrees to the rod at a distance of about fifteen to twenty centimeters from the prepared point. In this case, the sharpened edge must be lower than the blunt edge. Thus, the angle of entry of knives into the soil is thirty degrees( it is considered optimal).
Weld better by the template, which provides such an important symmetry in this case, because drilling a drill with a broken symmetry of the arrangement of the knives is much harder.
If you repeat similar operations with three disks of different diameters, welding them to the stem in successive pairs, starting with the minimum diameter, you can get a tool that allows you to save considerable effort during work. For interchangeable augers and handles, the possibility of rod extension is used special bushings, threaded connections, etc.