Hole opener, also known as hole saws or hole saw, refers to a special circular saw for machining circular holes in modern industry or engineering. It is easy to operate, convenient to carry, safe and widely used. It is convenient to cut round hole, square hole, triangular hole, straight line and curve on any curved surface of copper, iron, stainless steel, plexiglass and other plates when it is installed on the ordinary electric drill.
According to different sizes of circles, tappers have different apertures and specifications. At the same time, according to the depth of holes, they are divided into standard type and deep load type. They are installed on electric hand drill, impact drill, rocker drill and other electric tools.
There are two common types: fixed diameter and variable diameter (aircraft type). The variable diameter hole opener is often used for indoor and outdoor decoration.
Fixed diameter hole opener, there are ordinary type, impact type, water-cooled type, of which water-cooled type is commonly used for wall opening, with high efficiency and beautiful opening.
According to the material classification: bi-metal hole opener/bi-metal hole saw, cemented carbide hole saw, diamond hole saw. Different materials are used to cut different materials. The most commonly used is bimetallic saw. Cemented carbide is recommended for hard metal materials, and diamond is recommended for glass, carbon fiber, ceramics and other fragile materials.
The accessories of the hole opener mainly include: support handle, spring, drill bit, etc. the support handle belongs to general parts. The hole saw with different hole diameter is equipped with two specifications of support handle. The hole diameter between 14 and 32 mm is one specification, and the hole diameter larger than 32 mm is one specification.
The accessories of the hole saw mainly include: support handle, spring, drill bit, etc. the support handle belongs to general parts. The hole opener with different hole diameter is equipped with two specifications of support handle. The hole diameter between 14 and 32 mm is one specification, and the hole diameter larger than 32 mm is one specification.
High speed steel is a kind of tool steel with high hardness, high wear resistance and high heat resistance. High speed steel is mainly used to manufacture complex thin edge and impact resistant metal cutting tools, as well as high temperature bearing and cold extrusion die due to its good process performance and good combination of strength and toughness.
High speed steel tapper is a kind of opening tool made of high-speed steel, which is mainly used to open holes on metal plates or pipes. It can also be used for the center positioning hole before the hole opening, and then with the bi-metal hole saw to open the required hole diameter.
There are many kinds of alloy hole openers. Now the market is divided into (ordinary) special thin iron sheet, (practical type) special open thin stainless steel. (medium grade) special open stainless steel. (high grade type) special open stainless steel (steel plate thickness can reach more than 2cm).
Secondly: the bimetallic hole opener is used to open sheet iron, wood and plastic plate.
Third, the use of high speed steel tap hole opener and alloy tapper are similar. Points: ordinary, medium grade, high grade, full grinding, industrial grade.
Finally, alloy tapper is suitable for steel plate and high speed steel tapping machine is suitable for steel pipe.
6542 high speed steel
Features: low vanadium content (1%) and high cobalt content (8%). Cobalt and Du can make carbon compounds dissolve more in the matrix during quenching and heating, and use high matrix hardness to improve wear resistance.
Hardness: this kind of high speed steel has good hardness, thermal hardness, wear resistance and grind ability. The hardness of heat treatment can reach 67-70hrc, but some special heat treatment methods are used to obtain 67-68hrc hardness, which improves the cutting performance (especially intermittent cutting) and improves the impact toughness.
Application: cobalt high speed steel can be made into various kinds of cutting tools, which can be used to cut difficult to machine materials. Because of its good grinding performance, it can be made into complex cutting tools, which is widely used in the world. However, due to the lack of cobalt resources in China, the price of cobalt high-speed steel is very high, which is about 5-8 times of that of ordinary high-speed steel.
Environmental protection: environmental protection material, no pollution.
Post time: Sep-16-2020