CLICK handmade knife by Oleksandr Repa, buy to order in Ukraine, steel - S390 in stainless Damascus, 67-68 HRC
- Brand: Майстерня ножів ручної роботи ОЛЕКСАНДРА РЕПИ
- Product Code: КЛИК ніж ручної роботи майстра Олександра Репи
Загальна довжина клинка mm: | 270±05 mm |
Матеріал леза | Blade made of S390 steel in stainless Damascus. Powder metallurgy high-speed steel of the third generation, which is made from exceptionally pure fine powder produced at the modern BÖHLER plant in Kapfenberg, Austria |
Твердість клинка (метал): | Cutting edge hardness 67-68 HRC |
Матеріал руків'я: | Bolster and buttstock stainless steel. Vulcanized fiber, African elephant tusk of the highest grade |
Довжина леза | 130±05 mm |
- Availability: Під замовлення
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Description
TECHNICAL SPECIFICATIONS:
Knife name: CLICK handmade knife by Oleksandr Repa, buy to order in Ukraine, steel - S390 in stainless Damascus, 67-68 HRC
Knife type: Fixed blade
Brand: OLEKSANDR REPA Handmade Knife Workshop
Blade sharpening angle: Sharpened at 35 degrees
Bevels: Straight, false blade present, forging elements
Blade hardness: Cutting edge hardness 67-68 HRC
Total length: 270 mm
Blade length: 130 mm
Blade width: 34 mm
Blade thickness: 4.0 mm
Handle thickness: 24 mm
Blade grinding: Finish - lamination
Material of bolster (guard) and butt: Stainless steel
Handle: Bolster and butt stainless steel. Vulcanized fiber, African elephant tusk of the highest grade
Lanyard: None
Handle finish: sanding and polishing
Lanyard hole: Yes
Knife condition: New
Price: Indicated together with the scabbard and an exclusive gift box made of natural wood
Model number: 002
Craftsman: Olexandra Repa, Pereyaslav, Ukraine OLEKSANDR REPA Handmade Knife Workshop
Knife condition: NewPrice: Indicated with scabbard and exclusive gift box made of natural wood
Our products are intended for legal use only by responsible buyers. We will not sell our products to anyone under the age of 18.
Availability changes regularly, after confirming your order we will notify you of availability or when the item is ready. The product may differ slightly from the one shown in the photo.
S390 MICROCLEAN powder
S390 MICROCLEAN powder steel is a third-generation powder metallurgical high-speed steel made from exceptionally pure, fine powder produced at BÖHLER's modern high-quality powder steel production plant in Kapfenberg, Austria.
This alloy is expensive, belongs to the premium class with high hardness and complex mechanical and heat treatment. As a result, its hardness can reach up to 67-70 Rockwell units, which distinguishes itself with aggressive cutting and high performance characteristics.
S390 powder steel is widely used for the production of high-performance tools (for example, in the automotive industry - clutches, camshaft flywheels; in metal cutting - drilling, thread cutting, gear cutting tools, broaching and reaming, end mills, saws; in cold metal processing - various types of thread rolling tools, etc.), that is, where high accuracy of components is important, as well as the stability and duration of its use, therefore, it contains many alloying elements, the action of which is aimed at preserving the properties of steel in any conditions.
S390 steel has also proven itself in knife production, albeit not so long ago. From S390 steel, you can buy high-quality and reliable working and hunting knives of medium and small size, which will perform well in cutting durable materials, such as tendons and leather when processing game. Similar characteristics will be relevant for professional kitchen knives.
The production process of S390 MICROCLEAN powder steel looks like this:
The chemical composition of S390 MICROCLEAN steel is as follows:
- Carbon (C) – is responsible for strength after heat treatment, i.e. provides hardness and strength;
- Chromium (Cr) – increases the hardenability of steel, has a positive effect on corrosion resistance. This alloy has a low chromium content, so the knife blade requires care to protect it from rust. Chromium also increases wear resistance;
- Molybdenum (Mo) - allows you to increase the melting point, and therefore, preserve the quality of the blade at elevated temperatures. At the same time, the sword does not become brittle and brittle, with increasing hardness - the steel becomes more elastic, resistance to chemical aggressive substances increases;
- Vanadium (V) – its presence indicates increased elasticity, wear resistance, and also ensures inertness to chemical influences;
- Tungsten (W) – tungsten’s high melting point increases the resistance of steel at high temperatures. It is the main alloying element in high-speed steels;
- Cobalt (Co) is an expensive alloying additive that has a positive effect on heat resistance, and also increases the hardness and wear resistance of the metal, while these parameters are maintained at high temperatures and mechanical loads.
Thus, the advantages were as follows:
- high red-hot resistance, steel behaves well during hardening, and it works without problems even at low temperatures;
- very high wear resistance;
- excellent compressive strength;
- high viscosity; impact properties;
- knives made of S390 steel have good machinability, for example, grinding;
- good fatigue properties.
There are fewer disadvantages, but they still exist:
- corrosion resistance is not at the highest level, so the knife requires additional care, albeit minimal - wipe with vaseline oil, which is sold in any pharmacy;
- high price due to the complexity of steel production.
The S390 Microclean powder steel knife is certainly not a cheap pleasure, but it is worth it and will be useful for both professional activities and active hobbies, whether hunting, fishing, tourism or cooking.
*It is worth remembering that if you use the knife for its intended purpose and treat it with care, it will last you a very, very long time.
Vulcanized fiber
Vulcanized fiber is a composite material made of cellulose (cotton and cellulose fibers). The name is borrowed from the process of vulcanizing natural rubber to produce ebonite, which at first glance is very similar to the process of producing vulcanized fiber. In the production of vulcanized fiber, ribbons of cotton and/or cellulose fibers are passed through a parchmentizing bath with a solution of zinc chloride or sulfuric acid, as a result of which the fibers are slightly dissolved. The liquid is then squeezed out, as a result of which the individual fibers and ribbons are connected to each other without any binders.
Due to its high strength and stability, combined with its low weight and good elasticity, vulcanized fiber is used today not only for stamped parts, gaskets, laminate substrates and other industrial products, but also as a base for grinding wheels, so-called vulcanized disc grinding wheels or even short fiber wheels. For this, bases with a thickness of between 0.38 and 0.84 mm are usually used.
Vulcanized fiber can withstand high temperatures of up to 110° C for a long time. Therefore, when working with fiber wheels, high pressure and grinding in place should be avoided, as this can lead to blistering and burning of the wheel, i.e. tearing out the grain.
The cellulose that forms the basis of vulcanized fiber is hygroscopic, i.e. it can absorb moisture from the environment and give it away, as a result of which the volume of the fibers changes. In fiber wheels that are exposed to too high or too low air humidity, this effect leads to curling of the wheels. It is therefore recommended to store the wheels at medium air humidity (relative air humidity approx. 45-65%).
Vulcanized fiber is used by Klingspor as the basis for fiber discs. Here, Klingspor offers a wide range of products for various applications.
Elephant teeth
Elephant tusks are modified, well-developed, and continuously growing teeth – incisors or fangs (depending on the animal's species).
In the mouth of these land animals, in addition to the protruding tusks, there are four more molars (two in the upper and lower jaws), which consist of many interconnected enamel scales and allow elephants to grind food. The Asian elephant has chewing teeth that are ribbon-shaped, and the African elephant has diamond-shaped ones.
The molars are replaced about six times throughout the elephant's life, with new teeth growing behind the old ones.
As for the shape of the tusks, the Indian (Asian) elephant has thin tusks (females have no tusks at all). The African elephant's tusks are thick and huge, sometimes reaching two meters or more in length.
What else is different about the Indian elephant from the African one?
The tusks of the largest adult Indian elephant grow to a maximum of one and a half meters in length and weigh 20-25 kg. The growth of this animal can reach 3 m, and the weight - 5 tons.
The tusk of an elephant that grew in northern India is thick and strongly curved, while the tusks of its relatives that settled in southern Africa are thin and sharp, and the further south the territory, the thinner and sharper these formations. Indian elephants, unlike African ones, live exclusively in the forest, and prefer the undergrowth of bamboo thickets.
African elephants live in both forests and savannahs, and are the largest land mammals, as evidenced by the entry in the Guinness Book of Records. An ordinary African elephant weighs up to 5 tons, and a female elephant weighs more than 2 but less than 3 tons. The maximum length of an African elephant's tusk is 3 m. The largest representative of this species of elephant was shot in 1974 in Angola. This male weighed more than 12 tons.
Amazing details
Elephants do not feel panic horror at all when meeting a mouse - this is a fiction. To blow away such a small animal, and with it stones and other heavy objects that have appeared nearby, an elephant just needs to exhale.
These giants are truly afraid of ordinary honey bees. Hearing the buzz of an approaching bee swarm, elephants immediately run away. But these animals can hardly be called cowardly creatures. They are very careful and smart. By the way, the elephant is included in the list of the most intelligent animals on Earth.
Few people know that the elephant is the owner of exceptional hearing, as well as excellent memory and smell. The elephant is able to remember places that are significant to it, as well as people who have treated it badly (or well). But the most surprising quality of the elephant is its good musical ear, which allows it to remember and subsequently learn a melody of three notes. True, it likes low notes much more than high and sonorous ones. Unlike other representatives of the animal world, the elephant seems to have an idea of death. Elephants are able to recognize the corpses (and even bones) of their fellow tribesmen. Researchers were amazed at how the indifference with which elephants treat the remains of other living creatures is replaced by a manifestation of care and compassion for the corpses of their relatives.
Having seen the skeleton of an elephant, these animals cannot pass by: they begin to intensively feel the remains with their trunk, paying special attention to the head of the deceased. Having thoroughly felt the skull with their trunks, as if trying to identify a prematurely deceased friend, the elephants do not throw his lifeless body to the scavengers, but cover it with dry leaves. When one of the members of the herd is mortally wounded, the healthy elephants, as if seeing off a relative to a better world, stand by him and do not disperse until the very end.
Why elephant tusks?
With this “tool” the elephant uproots trees and sometimes defends itself from enemies, the main one of which is man. A rabid elephant with tusks (photo below), the length of which is sometimes equal to its own height, poses a serious danger to both its fellows and humans, but elephant rabies is a rare phenomenon. Elephant tusks are more a punishment from nature than a gift. The fate of African elephants is especially sad, and their tusks have always been very highly valued.
With the arrival of the white man with a gun on the "black" continent, Africa ceased to be an "elephant paradise." Mercilessly exterminating the good-natured giants for the sake of their precious tusks, European poachers left their carcasses to be devoured by hyenas and vultures.
Where is the "elephant cemetery" located?
Interesting fact: no one has ever found the tusks of dead African elephants. This circumstance formed the basis of numerous legends that the resourceful local population does not tire of inventing. The most ardent smugglers were ready to believe in the existence of mysterious elephant cemeteries, but then wildlife researchers took up the matter. According to information provided by 20th century naturalists, elephant tusks serve as a source of minerals for porcupines, which, with the arrival of the rainy season, completely lose the minerals contained in the soil.
The question of the disappearance of tusks remained open for a long time for the reason that porcupines are nocturnal animals.
Features of ivory
Elephant tusk has a soft, plastic texture with few cracks, but given that transportation across state borders, as well as storage of ivory products, is prohibited, buying this material is pointless. Externally, elephant tusks are mostly smooth and light, and from the inside they resemble hollow cone-shaped pulps, with internal voids reaching almost halfway along the length of the tusks.
How to distinguish an elephant tusk from a fake made from another material
Experts working with antiques note that very often the role of elephant tusks is given to quite high-quality plastic or ceramic fakes, which look very similar to carved ivory. Some counterfeiters pass off as elephant tusks synthetic materials with bone shavings filler, which are also difficult to distinguish from natural material. In most cases, casting and hand-painting methods are used to make fakes. If you look at the work of counterfeiters with an armed eye, you can detect seam lines and traces of molds. But the main difference is considered to be the unnatural smoothness and frivolity of unnatural products. Other, cheaper bone is often passed off as elephant tusks, but the reason is not always the high cost of natural material. It’s just that often sellers, being, in essence, resellers, themselves do not know what they are selling. There are also frequent cases when products made of elephant tusk were passed off as products made of bone, their ancient ancestor - the mammoth. By the way, mammoth tusks are prohibited not only for transportation, but also for processing. In March 2015, the Thai authorities decided on an interesting experiment, legalizing the storage of ivory. The population was invited to register the elephant and mammoth tusks illegally stored in their homes, in order to turn from smugglers into law-abiding citizens. As it turned out, ivory souvenirs are stored by almost all residents of the country. Those of them who decided to register their treasures, as promised, the state exempted from liability for illegal possession of smuggled goods. As it turned out, in many families, products made of ivory and mammoth bone played the role of relics and were stored for descendants. Now the owners of family valuables can rest easy. Thai citizens who do not respond to the authorities' appeal face a fine of $200,000 or 3 years in prison.
How do mammoth tusks differ from elephant tusks?
Mammoth tusks have no voids. Having a solid, uniform texture, they delight the eye with a variety of colors (from pale cream to thick black) and pronounced light and shade. The cross section of mammoth tusks has a heterogeneous color, resembling the alternation of dark and light rings, dotted with radial or circular cracks. The white color of the tusk and the brittle texture are characteristic signs of low-quality material. The main feature by which it is possible to determine that the “elephant tusk” actually belonged to a mammoth is a pattern in the form of a “mesh”, which opens when sawing crosswise. The mesh is formed by the interweaving of thin pits and nerve fibers.
Description from the website: https://yrok.pp.ua/novini-ta-susplstvo/5344-biven-slona-opis-ta-foto-ckav-fakti.html
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