Now manufacturers produce many types of drills. The cone drill, which is used in construction and installation work, is very popular. A variety of conical products is a step drill for metal, which can make holes of various widths.
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Cone drill for metal
Various cone drills for metal are easy to use. The working part of this device is a conical row, consisting of phased ring elements and a longitudinal groove, which has a sharp edge for cutting metal. Therefore, the same tool can be used to make different holes. Having chosen such a product, the master will not look for tools of different thicknesses in the process of work. You do not have to buy them, which will save on installation work.
A gradual change in the diameter of the conical tool is carried out due to the presence of smooth transitions from the wide part of the product to the tip. This form helps the rotation of the product, as a result, the processing efficiency of thin metal is increased. In the production of conical models, durable steel is used, thanks to which the product has a long service life and does not have to be sharpened often.
Cone drills can carry out such technological processes at a time, for which, when using other types of structures, several models must be applied in stages. Drilling holes in a metal sheet can be done at high speed, excellent processing quality is obtained, even if the sheet has a small thickness. Conical metal drills are used for processing steel sheets, non-ferrous metals, wood, plastic or plaster.
The tip of the conical tool ensures precise fixture installation, no need to punch an orientation hole in the workpiece. A cone drill is mounted on a hand drill or machine. If you pick up adapters, then such a device can be installed on a grinder or a puncher. Adapter design allows drilling holes in steel workpieces.
Tools are used to correct defects after using the drill, remove burrs, and make triangular holes. The conical fixture has a top. In order to carry out pre-drilling, there is a beveled transition. To remove the unevenness of the holes, there is a cutting edge, with its help you can increase the width of the opening.Tools are often used in car service when repairing car components, installing plumbing fixtures, repairing electrical panels, and in construction.
Step drill for metal
Devices having such a design make it possible to choose the diameter of the hole. Products have the shape of a cone with a sharp end. Step drills for metal contain a cone in the form of a spiral transition with a number of annular steps of various diameters.
The cutters have greater strength, this increases the durability of the product. A step drill is a type of cone-shaped tool. The design of the stepped fixture is different in that the increase in thickness is carried out in the form of steps on which the diameter is marked, which facilitates drilling and makes it possible not to constantly measure the width of the opening. The sheet metal thickness limit is marked on the product. If the sheet is of large thickness, then it is processed on both sides.
Benefits of a stepped tool:
- allows you to maintain the exact diameter;
- no need to additionally process the hole made;
- using 1 tool, make a hole with a diameter of 4 to 40 mm;
- can process metal with a thickness of 1mm;
- grinds the edges of the opening, which was cut with a standard tool;
- make a chamfer of the product;
- can be installed on a machine or a hand drill.
Sometimes distortions can occur. To avoid this, you must follow the instruction manual and carefully monitor the operation of the device. Step drills make openings of different diameters in workpieces made of steel, non-ferrous metal.
The step device is used in different situations:
- during various repairs;
- in landscape design;
- in the industrial production process;
- in the construction and installation of structures;
- heating installation;
- plumbing installation;
- housework;
- apartment renovation.
The stepped fixture is effective in smoothing out deformations or grinding burrs that the use of other tools gives.
Why does an electrician need a step drill for metal
A step drill can be used by an electrician. This device is necessary for him when installing electrical wiring. For example, an electrician must drill a hole in a steel profile to pass a wire through a drywall cladding. The thickness of the metal profile sometimes reaches 0.5 mm. The diameter of the cable to be passed is 16 mm. It is difficult to drill this profile with a simple tool, as the holes will come out uneven. With a multi-stage option, you can make a hole in the workpiece with a thickness of 16, 20, 25 mm.
Step drills are necessary for an electrician to work in electrical panels. Often it is necessary to drill a hole in the panel to install control buttons, indicators, various switches, fittings or a lock. The electrical panel is 1 mm thick. Mounting the gland on the shield requires drilling a wide opening in the shield.
A stepped product is used to make openings in metal cable boxes for wire output. If the openings for the wire outlet are fixed rigidly in the box, then it is necessary to make an additional hole for mounting the gland and the plug.
What to look for when choosing a drill
You should purchase a conical drill for metal, taking into account the tasks to be performed by this tool, the characteristics of the steel that is going to be processed.If you decide to choose a step drill for metal, you should consider the number of steps, their diameter, pitch, height, and the possibility of sharpening. In some designs of stepped models, the number of transitions reaches 12. The scope of the product, the speed of drilling and the quality of work depend on these parameters.
Depending on the different sizes of holes that need to be drilled, the configuration of the tool is selected. It should be taken into account when choosing which metal will be drilled, whether additional surface treatment is necessary. Depending on this, you should choose the characteristics of the tool and choose the appropriate cost. It is necessary that the diameter of the product meets the requirements of GOST.
If you intend to work with holes defined in the metric system, then you do not need to buy imported products with indicators in inches. You should take into account the need for frequent sharpening of a step drill by a turner or yourself. The manufacturer determines the quality of the product, so you need to choose the appropriate option for the ratio of price and strength of the device. The product must have high wear resistance, and tool sharpening should be done as infrequently as possible. The device must have a long service life.
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