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Main advantages of Taper Shank Drill Bit: ①Save steel. Shank Drill Bit forming processing is to process spiral grooves by removing the blank material by forming milling cutters, while Twist Drill forming processing is chip-free processing. The material is extruded and elongated by repeatedly rolling the outer circle of the blank, and then passed through a twist groove machine. The spiral groove is processed, which saves the high-speed steel material relatively. ② high production efficiency. Taking the 26mm taper shank twist drill as an example, the milling time for each piece of Taper Shank Drills is 3.5min for groove and edge cleaning, while the rolling and twisting method only takes 0.5min, and the production efficiency is increased by 7 times; with a 33mm taper shank Take a twist drill as an example, when milling the groove and edge of the twist drill, the milling time is 8.94 minutes per piece, while the rolling and twisting method only takes 1.47 minutes, and the production efficiency is increased by 6 times; with a 40mm taper shank twist drill For example, when milling the groove and edge of the twist drill, the milling man-hour is 12.5 minutes per piece, while the rolling and twisting method is 1.71 minutes, and the production efficiency is increased by nearly 7 times. ③ Improve internal quality. The groove shape of the rolled twist drill needs to be repeatedly rolled (3-4 times) during the forming process. The rolled and twisted twist drill products of our company are formed by rolling 4 times, which does not damage the internal fibers of the metal, and the core structure of the material is better. Dense, the incremental parameters of the core thickness of the product are relatively stable, and due to the deformation generated at high temperature, it can play the role of refining the grain structure, improve the distribution of carbides, make it more uniform, and improve the internal quality. ④ Improve product hardness. Due to the refinement of the internal grains, the hardness of the working part of the twist drill rolled and twisted after heat treatment can reach 65.3-65.8HRC, while the hardness of the working part of the twist drill processed by the milling method can only reach about 64.5HRC after heat treatment. ⑤ reduce costs. This process can not only save materials, but also greatly improve labor productivity, reduce production equipment and operators, and reduce plant area and work card and measuring tool materials.

Cable ties are straps for binding things. The appearance is a slender strap of a certain width, with a thrust function, and the tighter it becomes. Metal ties and plastic ties are common in life. Plastic ties are mostly used for bundling wires; metal ties are mostly used for bundling pipes. Cable ties are not rigid demand items, such as rope, shredded cloth, and tape can be used as temporary replacement cable ties without cable ties, but these materials are not as good as acid and corrosion resistance, endurance and use environment. bring. In life, you can buy cable ties in decoration stores or hardware stores, and they are mostly sold in groups. In terms of use function, it is divided into self-locking cable ties, live buckle cable ties, tamper-proof cable ties, fixed head cable ties, label cable ties, latch cable ties, etc. There is no clear division of use in use. Cable ties have low cost and good performance, and are widely used in people's lives, electronic appliances, stationery factories, fresh supermarkets and other fields or industries.

With the gradual improvement of workers` awareness of hand safety protection and the influence of foreign hand safety protection awareness, China`s personal protection industry has also ushered in a period of development. In recent years, many companies have focused their attention on the production of personal protective equipment. However, the direct consequence of getting in and out of the company is a serious homogenization of the product. With the deepening of the refinement of the industry, Taicang City Qihua Knitwear Co., Ltd. is market-oriented, takes scientific research as a leader, uses innovation as a means, and creates a more professional quality with precise professional skills. The company targets different groups of people. , Different environmental applications, different needs for the workers to create professional protective gloves.

The drill bit is mainly designed for woodworking row drilling rigs. The rotation direction of the drill bit is divided into (left-handed (L), right-handed (R)). The drill bit can drill and mill standard and smooth inner holes for various synthetic boards and solid wood. It is mainly used for furniture manufacturers such as suites, custom wardrobes, TV cabinets, cabinets, computer desks, etc. It is often used in row drilling rigs, bench drilling machines, hinge machines, and some machining center machines and equipment. Definition of row drill Definition of row drill: row drill is a special drill bit used for row drilling rigs. It is divided into left and right directions. The difference between row drill and other drill bits is the shank. There is a side plane on the handle. This side plane is used to fix the row by screws drill Drill bit composition The main components are shank and blade, and the blade is further divided into spiral cutter body + alloy head. The function of the shank is mounted on the collet, and the blade is the cutting part, which can effectively work. What is the difference between domestic and imported? 1. Alloy blade 2. Steel How to recognize left and right turn? 1. In terms of color 2. Viewed from the pin slot The difference between through hole drilling and blind hole drilling Through hole drilling: literally, perforating the hole, its advantage is that the top is sharp, and it will not burst the edge compared with blind holes Through hole drill Blind hole drilling: There is no need to drill through the plate, relatively speaking, the requirements for the drill bit are not so high The function of the twist drill and the four-edged drill is the same, but the name is different. In all our four-edged drills, the four-edged drill is called the twisted drill. Mainly used for row drilling, bench drilling. The smallest of the two is 15. The maximum specification of the four-blade drill is 100. The core of the middle door of the sand-pull drill can be twitched. The middle of the step drill is fixed. The core of the sand-pull drill is made of high-speed steel. Total length is 80 or 70 Extended drill Lengthened drill: The drill bit is generally 70MM or 100MM. The lengthening is literally understood, that is, the lengthened row drill. There are 80, 90, 100, 120 long.

A twist drill can drill metal. The twist drill bit can drill metal concrete, wood, ceramic tile, glass, etc. To drill holes on metals such as alloy steel, cast iron, etc., a black twist drill bit made of high-speed steel is required, and the speed should not be too high during use. Otherwise, it is easy to burn the edge of the drill. This drill can also be used on wood, and the speed should not be too high, because the wood will also heat up. Twist drill parameters The helix angle of the twist drill mainly affects the size of the rake angle on the cutting edge, the strength of the blade and the chip removal performance. Usually, the helical groove can be processed by milling, grinding, hot rolling or hot extrusion. The front end of the drill bit is formed after sharpening. cutting part. The apex angle of the cutting part of the standard ordinary twist drill, the bevel angle of the chisel edge is the clearance angle. Due to structural reasons, the rake angle gradually decreases from the outer edge to the middle, and the chisel edge is negative. The rake angle can be left and right. extrusion. In order to improve the cutting performance of the twist drill, the cutting part can be ground into various shapes according to the properties of the material to be processed.

morse saw blade---hole saw Master Cobalt® Bi-Metal Standard Hole Saw Cuts all machinable metals including stainless steel, wood, nailed wood, plastics, synthetic glass, drywall, fiberboard and composite materials. The standard cutting depth is 1-1/2", and it can cut workpieces with a size of 2*4'S. It needs to be configured with an axis to operate. Real McCoy® Bi-Metal Hole Saw Cuts all machinable metals including stainless steel, wood, nailed wood, plastics, synthetic glass, drywall, fiberboard and composite materials. The standard cutting depth is 1-1/2", which can cut workpieces with a size of 2*4'S. No additional shaft is required for operation. Master Cobalt® Bi-Metal Deep Duty Hole Saw The range of applications is the same as for the Master Cobalt® bimetal standard hole saw. However, the cutting depth is larger, reaching 1-7/8". It also needs to be configured with a shaft to operate. Real McCoy® TAD Bi-Metal Deep Cutting Hole Saw The range of applications is the same as the Real McCoy® bi-metal TA hole saw. However, the cutting depth is larger, reaching 1-7/8". No shaft configuration is required for operation. Tungsten Carbide Hole Saw Cuts wood, plastic, aluminum, steel, synthetic glass, drywall, fiberboard, plaster, tile, countertops without nails. Compared with bi-metal hole saws, it has a coarse pitch and is suitable for high-speed cutting of soft materials, not suitable for cutting pipes. Standard depth of cut is 1-1/2". Shaft configuration is required for operation. Real McCoy® Bi-Metal Hole Saw Kit The kit includes all sizes of hole saws commonly used by Real McCoy® professionals and is easy to carry. Tungsten Carbide Hole Saw Carbon Steel Hole Saw cuts very hard materials, including hardened steel, cast iron, brick, clinker, ceramic, foam glass, synthetic glass, composites, computer room floors, cement, ceramic tile. The standard depth of cut is 1-1/2"; and requires a shaft to be configured for operation. flat drill Can cut wood, plastic, plywood, bakelite. High speed and deep cutting at any angle. Master Cobalt® Bi-Metal Hole Saw Set The set includes all sizes of hole saws commonly used by Master Cobalt® professionals, and the Hole Saw Set Bi-metal is easy to carry. Reaming Bits/Grading Drills Can cut sheet metal, plastic, plexiglass, PVC, synthetic board, gypsum board. Used to drill or enlarge holes, and can also be used to smooth out burrs during automatic rust prevention. Shafts, Shaft Sets, Center Drills, Other Parts The shaft made of carbon steel is matched with the pilot drill. Makes the Morse hole saw usable with any professionally used power drill.

As a manufacturer with more than ten years of saw blade production and sales experience, it needs to be determined based on the materials and materials to be cut, size, thickness, shape, cutting method, cutting requirements, etc. 1 .The material of the cut aluminum material is not the same as the hardness and hardness of the aluminum material, and the paired alloy saw blade will also be different. If the texture of aluminum is too hard, the head of the alloy saw blade will need to be re-adjusted, because such materials cannot be hard-stiffened, otherwise it is very easy to damage the saw blade; if the aluminum material is soft, the blade of the alloy saw blade can be hardened Some, this can increase the durability of the saw blade. 2. The shape of the material to be cut Generally, the shape of the material to be cut of the enterprise is required to be fixed, and there will be special shapes in a few times. Therefore, slight adjustments must be made based on the data and results of the trial cut. 3. The thickness of the alloy saw blade and the number of teeth The cutting area and thickness of the cut aluminum alloy material determine the thickness of the alloy saw blade and the number of gears. If the material to be cut is relatively thin, then the saw blade must be thin and the number of gears is large, which can greatly reduce the occurrence of material bending and burrs; if the material to be cut is relatively thick, then the saw blade is To be thick and with a small number of gears, this can significantly reduce the yawing, sticking, and tooth decay. Therefore, it is necessary to select the correct blade thickness and number of gears based on the thickness of the material to be cut and the cutting requirements. 4 .cutting requirements and cutting methods The entire aluminum alloy cutting industry, most of the material cutting are required and cutting methods. For example, most aluminum alloy doors and windows require a 45-degree bevel; some people also require cutting without burrs, smooth cutting surfaces, and no chipping. This will need to choose the right alloy saw blade according to the actual situation 5 .Aluminum Alloy Saw Blade Size (Diameter) Size Selection The size of the aluminum alloy saw blade needs to be related to the machine equipment used and the thickness of the cutting material. Select the correct diameter blade depending on the size of the machine and material. 6 .Selection of Internal Control of Alloy Saw Blade The internal control of the saw blade is relatively simple. It is mainly based on the requirements of the equipment. However, in order to ensure the stability of the saw blade in the cutting process, the saw blade with a diameter of 455 mm or more is best. It is better to choose a larger one.

The impact drill is generally used in professional applications. It is a device for mounting on impact drills. It is used for drilling concrete foundations, walls, brick walls and granites to install expansion bolts and plastics in the holes. Expansion pipe and other fasteners. Most people do not understand the impact drill bit well. The following Xiaobian will tell you how to install the impact drill bit. Difference between impact drill and twist drill. How to install the impact drill? First remove the drill: Place the impact drill on the ground (the drill bit is up), hold down the plastic ring at the bottom of the drill bit with your left hand, lift the drill bit with your right hand, and remove the drill bit by turning it around. Finally install the drill: or inverted impact drill, hold down the plastic ring with your left hand, and rotate the right hand with the drill. Difference between impact drill and twist drill 1, impact drill Impact drills work by rotation and impact. The single impact is very slight, but more than 40,000 impacts per minute can produce continuous forces. Can be used for natural stone or concrete. When the impact drill is working, there are adjustment knobs at the drill chuck, which can be adjusted in two ways: ordinary hand drill and impact drill. However, the impact drill uses the gears on the inner shaft to perform the impact effect, but the impact force is far less than that of the electric hammer. It is not suitable for drilling reinforced concrete. 2, twist drill A twist drill is a tool that cuts a round hole of a workpiece by rotary cutting of its relatively fixed axis. It is named after its flute shaped like a spiral. Spiral slots have 2 slots, 3 slots or more, but 2 slots are the most common. Twist drills can be used in manual, electric hand-held drilling tools or drills, milling machines, lathes and even machining centers. The bit material is generally a high speed tool steel or a hard alloy. 3, What is the difference between twist drill and impact drill? The impact drill is modified on the basis of the twist drill to make it suitable for a variety of operational requirements, the shape can be understood in this way, the twist drill is a simple handle + spiral, the impact drill mostly handle + spiral + flat head. The above is how Xiaobian introduced the impact drill bit how to install? The difference between the impact drill bit and the twist drill bit, we should have some understanding of the impact drill bit after watching it. In the course of future use, we must also pay more attention to the safe operation and avoid unnecessary damage.

How important are our hands? Whether construction workers, logistics workers, or workshop workers, they rely on their hands to create value, good hand protection is a necessary condition for safety and improve production efficiency. Protective gloves have four protective functions 1. Wear resistance: mainly refers to the number of cycles of the glove material against repeated friction. 2. Cutting resistance: mainly refers to the number of circles of the glove material against cutting objects. 3. tear resistance: mainly refers to the tear unit force of glove material. 4. Puncture resistance: the force required by the long nail to Pierce the glove book.

Abstract: Nylon ribbon, nylon material of a ribbon. Tie belt is also known as bundle belt, lock belt, tie wire belt, according to the material division, there are nylon tie belt, stainless steel tie belt, plastic spraying stainless steel tie belt. There are many kinds of nylon tie belt, according to different functions, such as wiring equipment industry according to Xi 'an Jinai Nylon Products Co., LTD., divided into: self-locking tie belt, label tie belt, snap tie belt, anti-dismantling (lead seal) tie belt, fixed head tie belt, Before the mass marketization of nylon tie belt, when the traditional process is fixed wire or object, the rope or tie wire is generally used, also called tie wire. The traditional ropes and ties of the craft are slowly being withdrawn from the market, and more and more enterprises and factories prefer to use nylon ties. This involves the following aspects. 1. Traditional ropes and ties are usually made of PVC or fiber materials, but these materials in daily use, with the passage of time, will soon be weathered or rotten, causing inconvenience to the objects after use. 2. Like the PVC cable produced by tradition, it needs to use the wire to strengthen its toughness and tension, but because the appearance of some PVC in use will be out of or aging for a long time, the wire will be exposed to directly hurt objects, and if used in wire appliances, there will be conductive danger. 3. Whether the rope is still the traditional tie line, in the actual operation are more troublesome, the scale of workers' manipulation is also difficult to be the same, the labor cost is higher. The use of self-locking nylon ribbon is relatively simple, and the same scale will be used, for the enterprise to bring higher effectiveness. 4. Nylon ribbon itself has high tensile resistance, impact resistance, strong acid and alkali resistance function, in addition to the use of the industry, nylon itself also has a certain fire rating can reach 94V2, and these advantages, in the traditional rope and cable but do not have. 5. In recent years, the environmental protection requirements of the world, especially Europe, the traditional PVC materials are difficult to meet the standards set by the European Union. Another because of the traditional tie wire needs to use a lot of wire, China's steel price has been round round, and there is a certain risk on the price, so it has lost the market. The above review, nylon tie with a relatively stable development of the market prospects.

1. Distance measurement The commonly used distance measurement methods include tape measuring distance and photoelectric ranging. Measuring distance is measured with a tape ruler that can be rolled up/test large/along the ground, belonging to the direct measuring distance. Photoelectric ranging is to transmit and receive modulation light wave between two points with instruments, and determine the distance according to its propagation speed and time, for electronic physical ranging. Photoelectric ranging belongs to indirect ranging. 2. Measure the distance with a tape Type of measuring tape and measuring distance tool Measuring tape the measuring tape can be 20m, 30m, or 50m in length. 3. Distance measurement Generally, n whole foot section is measured first, marked on the ground with measuring brazing or marking, and finally measured the length, the total length is: In order to prevent errors in measurement and improve measurement accuracy, round-trip measurement is required. The difference between the measured length and the measured length, divided by the approximate value of the length, into the numerator 1 fraction, known as the relative error, or relative accuracy. The relative accuracy of the gauge distance should not be less than 1/3000. The standard length L is between the two endpoints of the scale field, which is measured with the authenticated steel ruler and obtained by temperature correction L ', (L-L ')/L is the number of corrections per meter. (4) length correction of steel measuring tape distance (1) when the length correction is greater than 1/10000 of the length of the ruler, the ruler length correction should be added;(2) when the temperature difference between the measurement distance and the standard temperature is plus or minus 10 degrees, the temperature should be added to correct; (3) If the ground slope measured along the ground is greater than 1.5%, the height difference should be added to correct.

Tap is used to drill tapping internal thread, generally marking first, then play positioning hole, and then artificial or mechanical tapping; Round die is used to do cylindrical external thread, such as supporting bolts and so on, generally do three point positioning, pay attention to maintain force and peace. Screw thread with die: 1. The processed workpiece is clamped on the three-jaw chuck, and the length of the thread is determined and the line is crossed; 2. Clamping die set thread tool force into the lathe tail seat sleeve, select the right to meet the requirements of the die, and its front outward, the reverse side and hole bottom by flat mount sleeve thread tool lock, find the tail seat position, pull the tail seat sleeve handwheel, so that the die gently set on the workpiece circle; 3. with die sleeve thread, must use cutting fluid. To tap a thread with a tap: 1.With twist drill drill car thread bottom hole, chamfering 30 to 45 degrees, and the diameter is slightly greater than 57 chamfering; 2. According to the requirements of the tap, with the tail seat zero scale to find the tail seat center, the hinge rod sleeve is locked on the tap square bar, and the tap into the hole, pull the tail frame top, against the tap tail center hole.

1. Impact drill A hammer drill works by rotation and impact. A single shock is very slight, but a frequency of more than 40,000 shocks per minute can produce a continuous force. Can be used with natural stone or concrete. There is an adjustment knob at the bit collet when the impact drill works, which can be adjusted in two ways: ordinary electric drill and impact drill. But the impact drill is to use the inner shaft of the gear beat each other to achieve the impact effect, but the impact force is far less than the electric hammer. It is not suitable for drilling reinforced concrete. 2, twist drill Twist drill is a tool used to drill round holes of workpiece by rotating cutting of its relative fixed axis. Because of its capacity chip groove into spiral shape and shape like hemp and named. Spiral grooves have 2, 3 or more grooves, but 2 grooves are the most common. Twist drill can be clamped on manual, electric hand-held drilling tools or drilling machines, milling machines, lathes and machining centers. Drill material is usually high - speed tool steel or carbide. 3. What is the difference between twist drill and impact drill Impact drill is improved on the basis of twist drill so that it is suitable for various operating requirements, shape can be understood like this, twist drill is a simple handle + spiral shape, impact drill for handle + spiral + flat head. 4. Where are they used Twist drills are usually made of metal. Construction drill is actually impact drill, mostly used for drilling concrete bricks and stones.

Hole saw can cut very hard material, including hardened steel, cast iron, brick, etc., carbon steel shaft and fixed core drill matching. Bimetallic standard hole saw can cut all machinable metals including unembroidered steel, wood, nailed wood, plastics, chemical fiberglass, drywall, fiberboard and composite materials. Standard cutting depth is 1-1/2", can cut the size of 2*4's workpiece. Bimetal hole saw can cut all machinable metals including unembroidered steel, wood, nailed wood, plastics, fiberglass, drywall, fiberboard and composite materials. Standard cutting depth is 1-1/2", can cut the size of 2*4's workpiece. Bimetal deep load hole saw application range and MasterCobalt® Bimetal standard hole saw. However, the cutting depth is larger, reaching 1-7/8". Hole saw can cut very hard materials, including hardened steel, cast iron, brick, etc., carbon steel shaft with fixed core drill. Bimetal standard hole saw It can cut all machinable metals, wood, nailed wood, plastics, fiberglass, drywall, fiberboard and composite materials including unembroidered steel. Standard cutting depth is 1-1/2", can cut the size of 2*4's workpiece. Bimetal hole saw It can cut all machinable metal, wood, nailed wood, plastic, fiberglass, drywall, fiberboard and composite materials including non-embroidered steel. Standard cutting depth is 1-1/2", can cut the size of 2*4's workpiece. Bimetal deep bore saw Application scope and Master Cobalt® Bimetal standard hole saw. However, the cutting depth is larger, reaching 1-7/8".

Twist drill is the most widely used hole machining tool. The usual diameter range is 0.25 to 80 mm. It is mainly composed of bit working part and shank. The working part has two spiral grooves, shaped like a twist, hence the name. In order to reduce the friction between the guide part and the hole wall when drilling, twist drill from the drill tip to the handle direction gradually reduce the diameter of the inverted cone. The screw Angle of twist drill mainly affects the size of cutting edge Angle, edge edge strength and chip removal performance, which is usually 25° ~ 32 °. Spiral grooves can be processed by milling, grinding, hot rolling or hot extrusion, and the front end of the drill bit forms a cutting part after grinding. The cutting Angle of the standard twist drill is 118, the bevel Angle of the cross edge is 40° ~ 60 °, and the back Angle is 8° ~ 20°. Due to structural reasons, the rake Angle is large at the outer edge and gradually decreases to the middle, and the transverse edge is negative rake Angle (up to about -55°), which acts as extrusion when drilling. In order to improve the cutting performance of twist drill, the cutting part can be ground into various shapes according to the properties of processed materials (such as group drill). Twist drill shank form has straight shank and cone shank two kinds, processing the former clip in the drill chuck, the latter inserted in the machine tool spindle or tail seat of the cone hole. The general twist drill is made of high speed steel. Insert welding carbide blade or crown twist drill for the processing of cast iron, hardened steel and non-metallic materials, such as the whole cemented carbide small twist drill for the processing of instrument parts and printed circuit boards.

Drilling operation is essentially a kind of cutting, the completion of cutting needs to meet the premise, that is, the hardness of the tool material must be higher than the hardness of the processed material. Precautions when using drill bits Bit material and heat treatment hardness, rigidity, and it is also very related to the Angle of grinding, different sizes, different drilling materials, to grind into different angles and tilt Angle. The harder the tool, the worse the toughness, and the thinner the bit, the worse the stiffness. The speed of drilling should not be too fast, especially the larger the hole should be slower. It is best to add appropriate cooling oil or water. In general, when drilling, it is necessary to make sample and punch holes first to prevent the bit from running off at the beginning. In home decoration, the general power of about 400W electric drill or impact drill can meet the requirements. So black drill drill iron is better, because we often need to make a hole what, we might as well at home to prepare a household drilling equipment, in case of need.

Sometimes we need to use a drill bit to make a hole in the surface of iron, but what kind of drill is good for drilling iron? Do you know the types and uses of drill bits? In fact, there are many types of drill, mainly according to its different uses and distinguish, that is, drill what kind of drill. In order to let you better understand the knowledge of drill, the following xiaobian will give you a simple introduction to the use of various commonly used drill. Type of drill iron Drill bits are usually made of high-speed tool steel or cemented carbide. In factories, high-speed steel is often used, and coolant is added at different speeds depending on the material used. 1, generally is black bit, drill the metal bit material is generally high speed steel, in the general metal material (steel, alloy steel, cast iron, cast steel, non-ferrous metals) on drilling, cooperate to use metalworking bit. However, pay attention to drilling on metal materials, the speed should not be too high, easy to burn the edge of the drill. Some are now gold-plated with rare hard metal films, made of tools steel and the like, hardened by heat treatment. The tip is ground to an equal Angle and slightly backward to form an acute edge. Drilling does not harden steel, iron, aluminum heat treatment, which tends to stick to the drill bit, drilling needs to be lubricated with soapy water. 2, in the concrete material and stone material drilling, the use of impact drill, with stone drill, cutter head material is generally hard alloy. Ordinary household, not cement wall drilling, with ordinary 10mm specifications of the hand electric drill. 3. Drill wood. Drilling on wood materials, with the use of woodworking drill, woodworking drill cutting sales, the hardness of the tool is not high, the tool material is generally general high-speed steel. There is a small sharp point in the center of the drill tip, and the opposite Angle is relatively large, or even no Angle. For good holding position. The same drill that drills metal can also drill wood. Because wood is easy to heat, brittle chips are not easy to come out, so we must slow down the speed, often exit to remove brittle chips. 4, in the higher hardness of ceramic tile and glass drilling ceramic tile drill, cutting tool material using tungsten carbon alloy, because the tool hardness is higher, poor toughness, need to pay attention to the use of low speed and no impact.

1, Drill bits are generally used for drilling and reaming, the common types are twist drill, reaming drill, deep hole drill, chamfering drill and so on - to the best tool OBS twist drill bit. 2, Center bit: generally used for drilling before the center point. 3, twist bit: the most widely used bit for industrial manufacturing, we generally use twist bit. 4. Super hard drill bit: the front end or all of the drill body is made of super hard alloy cutting material, which is used for drilling materials. 5, Oil hole drill bit: there are two holes in the drill body, through which the cutting agent reaches the cutting edge part to take away heat and chips. 6, Deep hole drill: the first used for barrel and stone drilling processing, also known as barrel drill. The deep hole bit is a straight groove type.

1, Drilling metal is generally black drill, drill material is generally high speed steel, in general metal materials (alloy steel, non-alloy steel, cast iron, cast steel, non-ferrous metals) drilling, with the use of metalworking drill. However, pay attention to drilling on metal materials, the speed should not be too high, easy to burn the edge of the drill. Some are now gold-plated with rare hard metal films, made of tools steel and the like, hardened by heat treatment. The tip is ground to an equal Angle and slightly backward to form an acute edge. Drill without heat treatment to harden the steel, iron, aluminum, aluminum easy sticky bit, drilling time need lubrication with soap and water. 2, In the concrete material and stone material drilling, the use of impact drill, with stone drill, cutter head material is generally hard alloy. Ordinary household, not cement wall drilling, with ordinary 10mm specifications of the hand electric drill. 3. Drill wood. Drilling on wood materials, with the use of woodworking drill, woodworking drill cutting sales, the hardness of the tool is not high, the tool material is generally general high-speed steel. There is a small sharp point in the center of the drill tip, and the opposite Angle is relatively large, or even no Angle. For good holding position. The same drill that drills metal can also drill wood. Because wood is easy to heat, brittle chips are not easy to come out, so we must slow down the speed, often exit to remove brittle chips. 4, In the higher hardness of ceramic tile and glass drilling ceramic tile drill, cutting tool material using tungsten carbon alloy, because the tool hardness is higher, poor toughness, need to pay attention to the use of low speed and no impact.

29PCS TWIST DRILL BITS HOT IN AMAZON READY TO SHIP