From the principle, two individual blades must be sharpened for scissors. Due to the mutual interaction with the clash during the cutting process, an independent sharpening is not enough. For small scissors such as nail shears, the common sharpening effect occurs especially in appearance.
First check the axle screw
A scissors has two wings that move crossing. Before sharpening should be checked if the axis of rotation, usually a screw, is tight. If the screw has loosened, the wing spacing of the scissor blades automatically changes with.
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In the non-optimal meeting of the two blade cutting can also sharp blades in use "stump". The cutting sharpness and cutting capability depends on the blades and the exact concretion. Before sharpening, the joint screw should be checked for the correct seat.
Shear blades individually or sharpen together
The construction of the scissors allows two procedures to sharpen the cutting. The simpler way is to take advantage of the scissors' movement mechanics. The cutting of an aid acting on the blade cutting is sufficient.
The scissors can be de-mounted for a more complex and, if necessary, sharper cut. The two individual blades are sharpened like knives. According to the existing cut, the
Angle can be adjusted when sharpening. A peculiarity of the scissor blades is the bevel that is only beveled on one side. Under no circumstances should it be damaged on the inside of the blades that meet when using the scissors. Maintaining the straight edge of the blade is more important than with a single knife blade.
Conventional household scissors do not have to be dismantled
In earlier times, scissors-grinders would move across the country and offer sharpening with their mobile whetstone at the front door. To do this, they usually opened the scissors and sharpened the two blade edges on the rotating grindstone. Only with experience and skill could they achieve a good result.
Today most household scissors can be sharpened without a rotating whetstone. Conventional kitchen and nail scissors can easily be sharpened sufficiently with several tools.
The following tools are particularly suitable for sharpening by cutting:
- Sandpaper (120 to 400 grit)
- Aluminum paper
A variety of cuts must be made through the paper with the scissors. Twenty cutting paths, each at least twenty centimeters long, can be used as a guideline.
When sharpening with sandpaper, the grit side should be turned over after each cut in order to reach both blades. Forty cuts in total are usually sufficient.
After sharpening, the resulting grinding dust can be removed with damp kitchen paper or, better, with a leather rag. The leather has the advantage of removing any burrs from the blades.
Special types of scissors
There are some special scissors for which more precise sharpening is recommended after dismantling the wings. These include tailor scissors, hairdressing scissors and hedge trimmers. The required razor sharpness cannot be achieved without dismantling.
After loosening the retaining screw, the individual blades are only ground from the outside with a bevel according to their cut. Soaked combination stones with two grain sides are suitable as grinding stones. The coarser grain size should be 120 to 220. A grain size of 300 to 400 is recommended for fine sanding. Subsequent removal of the burrs with a blade leather is necessary.
In order to recognize the correct angle and the already covered surfaces when sharpening, it is helpful to color the bevel with a felt pen. In this way, it is possible to track exactly where the cut has already been made and which surfaces have not yet been reached.
Table miracle machines and home remedies
In the trade, especially on the Internet, many grinding machines are available through which the scissor wings are simply to be pulled for sharpening. These machines work like a metal whetstone. Most of them have metallic grinding wheels inside, over which blades are pulled.
The result of these machines is worse than cutting through abrasive or aluminum paper. In addition, there is often an imprecise angle guidance and a rather rough effect on the blades. After a few sharpening passes, this can make it impossible to grind and severely impair the cutting result of the scissors as a whole.
"Home remedies " such as preserving jars or pins are also less recommended. Apart from the effort, the results in no way exceed the simple cutting results.
A grooved grinding wheel is required for gears
If the scissors to be sharpened have teeth on one side of the blade, they can to a certain extent also be ground with the sharpening by cutting. If it is disassembled, a special rotating gear grinding wheel is required. It consists of a grooved surface that is adapted to the size of the teeth.Tips & Tricks Always use your scissors as exclusively as possible for special items to be cut. Cut only fabric with fabric scissors, only paper and cardboard with office scissors, and no metals with all-purpose scissors in the kitchen. This also includes metal fiber reinforced fastening straps, which are sometimes used on new products as a holder for type and price tags. Electric cables should also be taboo.