First, the basic blade type and the actual edge matching
1. There are four basic blade types:
(1) Type A is a horizontal and longitudinal cut type. (2) Type B is used for longitudinal cutting.
(3) Type C is used for cross-cutting. (4) BT type is used for metal cutting.
2. Actual edge matching.
The blades actually used are paired with various combinations of blades according to the different materials being cut and the purpose of processing. Although they are all combinations of the above basic blade types, due to the ever-changing sharp corners of the knife, it brings great difficulties to the selection of saw blades. The correct choice of saw blade is very important, it requires a full understanding of the basic blade type, tip angle, etc., and also requires a certain amount of practical experience.
Second, the selection and use of saw blades
1. Factors affecting the accuracy of the processing surface:
(1) Blade angle and blade accuracy (appropriate angle, lead, side runout is small).
(2) The number of edges (the cutting force is the minimum number of edges).
(3) Condition of the body and waist, internal stress, hardness, etc.
(4) The precision and rigidity of the use of machinery.
(5) The number of revolutions (within a certain limit, the higher the number of revolutions, the better the cutting surface, but the greater the wear of the tool).
(6), the material feed rate (low speed is better, but too low will cause burns).
(7), cutting method and position (the closer to the periphery, the better, but the tool wears fast).
(8) The material to be cut (choose a material with good uniformity)
2, the choice of saw blade:
In order to be able to obtain good cutting results and achieve the purpose of safe, efficient and economical production and processing, it is necessary to select the appropriate saw blade according to the specific processing conditions. To this end, the following factors need to be considered comprehensively.
a. Several elements of cutting processing using circular saws:
(1) FN per turn of the tool FN per tooth cut-in FZ
It has the following relationship with the rotation number n (rpm) of the tool, the material feed rate (m/min), and the number of circular saws Z: Fn=F/n*1000(mm) Fz=Fn/Z=1000*F/(n*Z)
(2), cutting speed V(m/min) Cutting speed refers to the circumferential speed of the circular saw when it is rotated.
It has the following relationship with the diameter D(mm) and the number of rotations n(rpm) of the circular saw: V=л*D*n/1000(m/min).
(3) When machining, according to the material to be cut and the purpose of processing, the appropriate values should be selected for each tooth cut in amount Fz and cutting speed V.
The amount of Fz per tooth cut is selected by referring to the following table:
Precision materials
Hardwood
plywood
Medium density board
High density board
New building materials
Plastic aluminum, etc
Longitudinal cut
Crossing
General accuracy
0.1-0.15
0.5-0.9
0.1-0.5
0.08-0.12
0.1-0.3
0.04-0.06
High precision
0.03-0.1
0.02-0.08
0.02-0.1
0.02-0.04
The cutting speed V selection refers to the following empirical values:
Wood: 4600-5500m/min: Plywood: 3000-4500m/min: Wood-based panel: 2000-3000m/min
(4), Cutting method:
Depending on the relative position of the circular saw and the material being cut, there are four cutting methods: cis-cut, reverse-cut, down-axis down-cut, and down-shaft reverse-cut.
b. Durability of circular saws:
(1) The hardness of the blade: In the case of no collapse and curling edge, the higher the hardness, the better.
(2) Grinding angle: In the case that the body and the tip of the knife can remain stable, it is better to be sharp.
(3), the number of edges: too many or too few blades are not good, should be based on the number of tool revolutions, the material to be cut and thickness, material feed speed and other factors to choose the appropriate number of edges.
(4), the number of tool revolutions: Generally speaking, increasing the number of revolutions is mostly to improve the material feed speed, but the number of revolutions directly affects the cutting speed. Generally, it should be determined according to the material being cut (in fact, it is limited by the machinery used by the user).
Third, the causes and countermeasures of chipping blades, saw marks, body cracking and deformation
1. The carbide bit is broken when the saw blade is cut
a. When the saw blade is working, it encounters iron nails, hard objects such as hard joint scars, causing fragmentation.
b. The hardness of the blade is too high, the blade is too brittle, and it is not suitable for the material to be cut.
c. Excessive load during cutting.
d. Residual stress when welding the knife head is large.
countermeasure:
a. Carefully check whether the cut object has a hard foreign body before cutting.
b. Select three elements of reasonable cutting.
c. Select a reasonable blade according to the material to be cut, and pay attention to the process parameters when welding.
2． The saw body cracks.
a. The hole opened when the saw blade is designed is too close to the heel circle.
b. The cutter head corresponding to the degree groove is prominent, resulting in a large cutting load, so that the small hole in the heel of the groove is cracked.
c. The heat treatment process control is not ideal.
d. The force applied by the waist entry process is too large, and the body produces too much tensile stress.
e. Normal cracking.
a. Reasonable design of the size and shape of each part of the saw blade.
b. Control the grinding accuracy of the cutter head.
C. The heat treatment process is strictly controlled, and special attention is paid to controlling the grain size of the tissue after heat treatment.
d. Apply a suitable force when the waist is processed, and pay attention to the position of the force application point.
3. Saw marks occur before cutting the blade
cause:
a. The shape, angle, number of teeth, etc. of the saw blade are not suitable for the material to be cut.
b. The three elements of cutting (cutting speed, feed speed or feed amount, and cutting depth) are unreasonable.
For example, the machine spindle speed does not match the waist entry of the saw blade; the feed speed is too large, resulting in excessive cutting force, resulting in deformation of the saw blade body, etc., which will affect the cutting effect.
c, saw blade accuracy, waist strength and small, waist strength uniformity is not good.
For example: the inner diameter of the saw blade is ultra-poor, the saw blade beats too much, the symmetry of the side protrusion is abnormal; the waist strength is not suitable and so on.
d. The balance of the saw blade is not good.
Although the saw blade is qualified for static detection, the dynamic balance may also be bad, and when rotated, it will cause the saw blade to run, affecting the cutting effect.
e. Finish the saw blade in time.
The blade is used for a period of time, and after the blade is blunted, it must be re-ground in time. If it is used excessively, it will cause excessive cutting force and cause the saw blade body to be deformed. At the same time, it will also cause excessive friction, resulting in "burning saws". Thus affecting the cutting effect of the saw blade.
f. Poor re-grinding accuracy.
Re-grinding must be carried out by selecting a qualified manufacturer. If the re-grinding equipment, materials, technology, etc. are not suitable, such as: grinding machine, beech wheel is not suitable, grinding personnel technical level is poor, it may cause the saw blade accuracy to deteriorate, the head crack or chipping, the blade angle change and other adverse consequences, resulting in the impact of the cutting effect.
g, the user machine tool accuracy is not good.
To achieve good cutting results, the premise is that the machine must be qualified. If the machine used is unqualified, for example: mechanical spindle bending deformation: spindle runout is abnormal, etc., even if the saw blade is qualified, it will cause poor cutting effect.
a. According to the characteristics of the cut material, select a reasonable saw blade tooth shape, angle and number of teeth.
b. Select reasonable cutting three elements when cutting.
C. Control the accuracy of the saw blade, the waist strength is small, especially the waist strength uniformity.
d. Control the factors affecting the dynamic balance in the production process of the saw blade.
e. Timely trimming saw blade.
f. Control the grinding accuracy and ensure that the original accuracy of the saw blade is not changed.
g. Select a qualified machine tool.
4. Burrs and chipping edges
a. The saw blade tooth type, angle and other parameters are not suitable for the material to be cut.
b. The accuracy of the saw blade is poor.
c. The accuracy of the user's machine tool is poor.
d, saw blade waist strong size, uniformity is not good.
e, the dynamic balance of the saw blade is not good.
f. The three elements of cutting do not match.
g. The material is fixed and uncertain.
a. According to the characteristics of the material to be cut, select reasonable saw blade parameters.
b. High-precision saw blade is selected, and the main indicators are: end face runout, radial runout, flatness.
c. The error of using qualified machine tools, especially the spindle end surface runout, radial runout, feeding guide mechanism, etc. cannot be overscored.
d. According to the actual working conditions, reasonably determine the waist strength and smallness, and ensure the uniformity of the waist strength.
F. Use reasonable cutting of the three elements, pay attention to avoid the resonance area.
g. Improvement of clamping mechanism and method.
5. The body is deformed during the working process of the saw blade
a. The shape, angle, number of teeth, etc. of the saw blade are not compatible with the material to be cut, resulting in deformation caused by excessive cutting force.
b. The hardness of the saw blade body material is not good.
c. The waist strength of the saw blade is not good and uneven.
d. The three elements of cutting are unreasonable, and the load of the saw blade is large.
f. The accuracy is not good after heavy grinding.
a. Select reasonable saw blade parameters according to the material to be cut.
b. Control the heat treatment process.
C. The waist strength is small and adapts to the working conditions, and attention is paid to the uniformity of the waist strength.
d. Reasonable selection of cutting three elements.
e. When the knife head is worn, it is timely to repair the grinding.
f. Strictly control the grinding accuracy when re-grinding.
Fourth, the method of maintaining a good cutting surface
1, the use of qualified machine tools, especially the spindle end runout, radial runout, feeding guide mechanism and other errors can not be over-bad.
2. According to the characteristics of the material to be cut, select reasonable saw blade parameters.
3. Select high-precision saw blade, the main indicators are: end surface runout, radial runout, flatness.
4. According to the actual working conditions, reasonably determine the strength of the waist, and ensure the uniformity of the waist strength.
5. Use reasonable cutting three elements, pay attention to avoid the resonance area.
6. When the saw blade is not sharp, timely and reliable grinding.
7. Improvement of clamping mechanism and method.
directory
1. Advantages of pre-alloy technical characteristics
2. Carbide saw blade
3. Summary of relevant information of cemented carbide saw blades
4. How to use a good carbide saw blade
5. Selection of carbide saw blades
6. Alloy circular saw blade use and trimming, process related knowledge
7. Saw blade knowledge: carbide guide block
8. Safety precautions for the use of alloy saw blades
9. Basic requirements for the use of alloy saw blades
10. The carbide saw blade in furniture processing is used correctly
11. Maintenance, use and maintenance of cemented carbide saw blades
12. Coated cemented carbide in machining tool knowledge
13. Alloy saw blade welding tooth knowledge
14. Basic parameters of cemented carbide saw blade
15. Processing technology of alloy circular saw blade
Due to the large amount of information, if you need to view all the contents in the above directory, please click on the lower left corner of this page to read the original article. The following is a summary of only the relevant information of carbide saw blades.
First, the cutting object 1, solid wood material A, softwood softwood material is generally soft, production is also known as soft wood. The leaves are slender as needles, mostly evergreen trees, the material is generally softer, some contain resin, so it is also called soft wood, such as:
Red pine, larch, spruce, fir, fir, cypress, etc., all belong to this category. B, hardwood hardwood hardwood is generally harder and heavier, also known as hard wood. The leaves are wide, the veins are networked, most of them are deciduous trees, and the material is relatively hard, so it is called hard wood. as:
Camphor wood, ash willow, green oak, teak, beech, color wood, etc., all belong to this category. There are also a few slightly softer textures, such as birch, basswood, aspen, aspen, etc., all of which belong to this category due to the wide variety of broad-leaved trees, collectively known as miscellaneous trees. Among them, the material is light and soft, such as poplar, paulownia,
Light wood, etc.; the material is hard and heavy, such as hemp oak, green oak, wood lotus, maple incense and so on. 2, wooden composite material A, solid wood composite floor
1) Three-layer solid wood composite floor: made of three layers of solid wood interlaced lamination, the surface layer is high-quality hardwood specification slats inlaid panels, the core layer is cork slats, and the bottom layer is rotary cut veneer. It overcomes the unidirectional homogeneity, is not easy to deform, and has the characteristics of solid wood flooring.
2) Multi-layer solid wood composite floor: multi-layer plywood as the substrate, specification hardwood flake paneling or planed veneer as the panel, through the urea-formaldehyde resin glue staggered hot pressing, the characteristics are basically the same as the three-layer composite floor.
3) Joinery veneer floor: the upper surface layer, core layer, bottom layer downgrade lamination to form B, plywood, veneer
1) Plywood: Plywood is a board made of logs that are rotated into large veneers in the direction of the annual ring, dried and glued according to the principle of opposing the direction of adjacent veneer wood grains. The number of veneer layers is odd, generally three to thirteen layers, common are plywood, plywood, plywood, and thirteen plywood (commonly known in the market as tricycle, five-centalin, nine-plywood, thirteen-plywood). The outermost front veneer is called a panel,
The reverse side is called the back plate, and the inner layer plate is called the core plate.
2) Veneer: Veneer, also known as veneer panel, is the common name of decorative veneer veneer plywood (referred to as decorative board). He is one of the main surface decoration materials in home decoration, belonging to the plywood series, which is based on plywood and has a variety of natural and artificial panel veneers. It has the natural texture and color of various woods, and is widely used in the decoration of the surface layer of home and public spaces.
3, particle board, MDF A, particle board, also known as crushed board, is the wood processing residue, trail wood, wood chips and other things cut into a certain specification of the crush
Tablets, after drying, mixed with rubber, hardener, waterproofing agent, etc., at a certain temperature, pressure is pressed
A kind of wood-based panel. B, MDF, also known as fiberboard, is based on wood fibers or other plant fibers as raw materials, the application of urea-formaldehyde resin or other suitable
Artificial panels made of adhesives. According to the different amounts, it is divided into high-density board, medium-density board and low density
Degree plates. Density at 0. 50～0． Plates within the range of 88 are called medium and high density fiberboard. C, particle board and MDF difference particle board: the middle of the long wood fiber + two sides of the fine wood fiber, pressed into the board. There are 16 MM, 18MM,
19MM, etc. Expansion rate, fire performance, deformation resistance, nail grip force, are better than MDF.
Medium density fiberboard: Powdery wood fiber is pressed and molded by high temperature, and the surface flatness is good. Suitable for blister board, paint board, etc., because most of them are pressed by fragments, and particle board has long wood fibers, which retains more characteristics of wood, so the expansion rate of MDF is higher than that of particle board.
4, organic materials and their products A, rigid plastic plastics are synthetic resins or natural resins as the base material, adding (or not adding) a variety of additives, reinforcements
Materials and fillers, solid materials or articles obtained by molding at a certain temperature and pressure. Rigid foam plastic has no flexibility, the compression hardness is very large, only to reach a certain stress value to produce deformation, after the stress is lifted can not return to the original state.
B. Plexiglass
Polymethyl methacrylate is commonly referred to as plexiglass, abbreviated PMMA, with high transparency and low
The advantages of price, ease of machining, etc., are the glass alternative materials that we usually use frequently.
Physical properties of plexiglass: density: 1.19kg/cm3, light transmittance: 99%, impact strength ≥ 16kg/cm3, tensile strength ≥ 61Kg/cm3, thermal deformation temperature ≥ 78 °C, thermal softening temperature ≥ 105 °C.
5. Non-ferrous metals
Non-ferrous metals in the narrow sense, also known as non-ferrous metals, are a collective term for all metals other than iron, manganese and chromium. Generalized non-ferrous metals also include non-ferrous alloys. A non-ferrous alloy is an alloy composed of a non-ferrous metal as a matrix (usually greater than 50%), with the addition of one or several other elements. Commonly used non-ferrous alloys are aluminum alloys, copper alloys, magnesium alloys, nickel alloys, tin alloys, tantalum alloys, titanium alloys, zinc alloys, molybdenum alloys, zirconium alloys and so on.
6. Iron materials and soft steel
Suitable for cutting square pipes, profiles, angle iron and round pipes.
Second, the type of substrate corresponding to the cutting object
1. Matrix shape and size
A. Tooth angle
The tooth shape angle of the base body is mainly divided into: anterior angle, posterior angle and wedge angle.
Front angle: The front angle is the cutting angle of the serration, the larger the front angle, the lighter the cutting, and the front angle is generally between 10-15°.
Rear angle: The rear angle is the angle between the serration and the machined surface, and its role is to prevent the sawtooth from rubbing with the machined surface, and the larger the back angle, the smaller the friction, and the smoother the processed product. The posterior angle of the bridal saw blade is generally valued at 15°.
Wedge angle: The wedge angle is derived from the front and back corners. However, the wedge angle can not be too small, it plays a role in maintaining the strength, heat dissipation and durability of the teeth.
B. Number of teeth
The number of teeth of the saw blade, generally speaking, the more teeth, the more cutting edges cut in a unit time, the better the cutting performance, but the number of cutting teeth needs to use more cemented carbide, the price of the saw blade is high, but the saw teeth are too dense, the amount of chips between the teeth becomes smaller, which is easy to cause the saw blade to heat; in addition, there are too many saw teeth, when the feed is improperly coordinated, the amount of cutting of each tooth is very small, which will aggravate the friction between the edge and the workpiece, affecting the service life of the blade. Usually the tooth spacing is 15-25mm, and a reasonable number of teeth should be selected according to the material of the sawing.
C. Thickness
The thickness of the saw blade theoretically we want the thinner the saw blade, the better, and the saw gap is actually a consumption. The material of the saw plate with carbide saw blades and the process of manufacturing the saw blades determine the thickness of the saw blades. When selecting the thickness of the saw blade, it should be considered from the stability of the blade work and the material of the sawing.
2. Functional division of types
A. Woodworking universal cutting blade
The front angle is generally between 10 and 15 °, according to the size of the specifications (Φ 200 ~ Φ 450), the number of teeth is generally 60 ~ 120 teeth, generally used for all kinds of wood cross cutting and longitudinal cutting.
B. Non-ferrous metal cutting blade
The front angle is generally between -5 ~ 10 °, according to the size of the specifications (Φ 250 ~ Φ 500), the number of teeth is generally 100 ~ 120 teeth, generally used for precision cutting aluminum profiles, hard plastics and plastic steel materials.
C. Organic products cutting saw blade
The front angle is generally between -5 ~ 10 °, according to the size of the specifications (Φ 200 ~ Φ 300), the number of teeth is generally 80 ~ 100 teeth, the thickness is thinner than the conventional. It is generally used to cut plexiglass, rigid plastic, picture frame, mirror frame and other organic materials.
D. Multi-blade saw with scraper
The front angle is generally 15 ~ 25 °, according to the size of the specifications (Φ 250 ~ Φ 400), the number of teeth is generally 16 ~ 40 teeth, with a scraper, the middle hole has a keyway. It is generally used for multi-slice longitudinal cutting of wood.
E. Grooved saw blade for carpentry
The front angle is generally 0 ~ 10 °, divided into single stroke and double stroke, according to the size of the specification (Φ 100 ~ Φ 300), the number of single stroke teeth is generally 24 ~ 60 teeth, and the number of double stroke teeth is generally 10 ~ 28 teeth. It is generally used for the pre-squashing of double veneer and double-sided panels to eliminate the phenomenon of veneer cracking.
F, anti-rebound dovetail tooth saw blade: general site portable saw machine.
The anterior angle is generally 15 ~ 20 °, the entire tooth shape is like a swallowtail, which has the effect of preventing the cutting from rebounding and guiding. According to the size of the specifications (Φ 200 ~ Φ 500), the number of teeth is generally 16 ~ 60 teeth. Generally used with multi-blade saws, forming saws and construction site portable saws.
G. Slotted saw blade for woodworking
The front angle is generally between 10 and 15 °, according to the size of the specifications (Φ 100 ~ Φ 300), the number of teeth is generally
12 ~ 60 teeth, generally used for the slotting of various plates.
H. Edge banding machine trimming circular saw blade, trimming machine crushing saw blade
The front angle of the two types of saw blades is generally between 10 and 15°. The edge banding machine trimming saw blade has a small size (Φ 100 ~ Φ 200), a large tooth shape, a number of teeth of 20 ~ 36 teeth, and generally with 4 scrapers. The trimming machine is slightly larger (Φ 250 ~ Φ 450), the number of teeth is 40 ~ 80 teeth, and some saw blades will have 4 grooves around the periphery. The trimming blade of the edge banding machine is generally used for the veneer trimming of the double veneer particle board, while the trimming blade of the edge banding machine is generally used for the trimming and specification of the double veneer panel and the fibre board.
I. Some relatively thin finger joint knives, table knives, and thread knives
According to the structure of the finger-connected tool, it can be divided into two types: piece milling cutter and integral milling cutter. A piece milling cutter is a small thickness milling cutter with a thickness equal to the pitch of the command. When used, the individual milling cutters are stacked and fastened together with a sleeve and nut or separately with a nut. The number of milling cutters in a set of pieces depends on the width or thickness of the machined part. In order to mill a non-structural material command shoulder, a thicker side blade knife is installed on one or both sides of the group milling cutter. The end face of each piece milling cutter must have high accuracy and surface finish, so that the combination of each piece of milling cutter can process a command that meets the accuracy requirements. This milling cutter can be set with a carbide bit, improve the wear resistance of the edge, and replace these piece milling cutters when the edge is damaged, but the accumulation error of the tooth pitch is large and consumes a large auxiliary labor.
According to the number of edges of the finger milling cutter, it can be divided into two types of edges and four edges. The number of tool edges is large, and the average cutting force and cutting power are increased, but the vibration during cutting is reduced and the finish of the cutting surface can be improved.
Third, the cutting method
1. Longitudinal cutting
2, crossing
3. Multi-slice longitudinal cutting
4. Groove of veneers and composite materials
5. Slotting
6. Trimming
Fourth, the shape of the alloy bit, the combination teeth, the use and the welding method
1. The shape and use of the knife head
A. Flat teeth
Flat teeth are the most widely used, mainly used for sawing of ordinary wood, this tooth shape is relatively simple, the saw edge is relatively rough, and the flat teeth can make the bottom of the groove flat during the slotting process operation.
B. Bevel teeth
The quality of the bevel sawing is relatively good, suitable for sawing all kinds of wood-based panels and veneers. The semi-bevel teeth are suitable for cutting hardwoods and even sheets containing wire and nails.
C. Trapezoidal teeth
Trapezoidal teeth are suitable for sawing veneers, fireproof boards, and can obtain high sawing quality.
D. Inverted trapezoidal teeth
Inverted trapezoidal teeth are often used for bottom slot saw blades.
In addition, some knife heads also have face angles, which increase the cutting angle, which can sharply cut off the wood fiber tissue and improve the finish of the cutting surface.
2. Combination of different shapes of knife heads and their uses
A. Under normal circumstances, sawn particle board and medium-density board should be selected left and right teeth. Because of the large front angle of this combination, the wood fiber tissue can be sharply cut off, and the incision is smooth.
B. Sawing veneer panels and fireproof boards generally choose flat ladder teeth (flat teeth, trapezoidal tooth combination). Due to the large cutting rate of the computer cutting saw, the diameter and thickness of the cemented carbide saw blade used are relatively large, and most of them use flat ladder teeth to reduce chipping edges and saw marks.
C. Cutting non-ferrous metals such as aluminum or copper generally uses flat ladder teeth. In addition, in addition to the above general situation, there are more complex tooth combinations to meet the needs of cutting different objects, such as: cutting plexiglass, plastic, frame and frame, etc., generally using left and right flat tooth combination.
3. Knife head welding method
A. High-frequency welding
At present, the commonly used welding method is generally high-frequency welding, and the high-frequency welding method is divided into manual, semi-automatic and fully automatic welding, of which the automatic welding method is fast and the welding accuracy is high, so the accuracy requirements for the saw blade matrix are also higher. In addition, the welding process should pay attention to the tempering treatment of the tooth part to ensure the toughness of the tooth part of the saw blade, otherwise the saw blade is prone to brittle cracking and tooth loss during use.
1. Efficient and fast welding teeth, 1-5 seconds per tooth;
2, good repeatability, each tooth has good repeatability;
3. Heating is fast and uniform, which can effectively prevent embrittlement and fracture caused by local overheating of the serration, and can also prevent it
4, can weld high-performance, high-hardness saw blades, these saw blades can not be welded with resistance welding B, resistance welding five, saw type and related parameters 1, precision push table saw
General purpose model MJ6128/30/32/38 Maximum lateral sawing length 2800/3000/3200/3800mm Maximum longitudinal sawing length 1250mm Maximum sawing height 70~80mm saw blade inclination 0~45° Main saw blade specifications Φ250~Φ 400 Main saw blade speed 4000~6000rpm scribing blade specifications Φ120 scribing saw blade speed 8000rpm Total motor power 3.75kw For processing various density boards, particle boards, Wood-based panels, PVC panels, organic
Glass and solid wood and other wood structures, similar hardness of the board
2, linear edge banding machine generic model MDZ515 sheet thickness 10 ~ 55mm sheet width ≥60mm sheet length ≥ 30mm edge band thickness 0.4 ~ 15 power 6.5 ~ 12 feeding speed 6 ~ 16
Sixth, cemented carbide tool head grade and function
Seven, cooling method Cooling method is generally divided into water cooling and air cooling. Eight, carbide saw blade instructions 1, saw blade installation, please avoid knocking and impact, the general saw blade to be higher than the plate 5 to 6 serrations for the appropriate
combine. 2. Ensure that the radial runout of the saw is ± 0.02mm, and the swing ± 0.01mm. 3. The diameter of the flange disc cannot be less than one-third of the saw blade to avoid the loss of the saw blade during use
balance. 4. When the saw blade is not at normal speed, please do not cut, such as the material to be cut has iron nails and other metals
, the feed speed should be reduced or stopped immediately. 5. Can not be used to cut sandy materials such as cement. 6, use a period of thick, to often check and grind, not used, should pay attention to maintenance
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