Manufacturing blades for metal band saws
A band metal saw blade is a flexible, ring-shaped cutting blade that can have different types of teeth. These are the key elements in choosing this element of a band saw machine. The blades are used for cutting in metalworking. It is used both on household and industrial equipment.
An overview of popular brands
Today’s metal band saw market is rich with a wide variety of offerings. Among the rich list of manufacturers there are several brands that are popular with customers.
- Arntz company produces solid carbide models of band saws. Products of the German manufacturer are characterized by reliability, build quality and are manufactured under quality control at all stages of production.
- American brand Lenox products are characterized by applying on the saws a layer of protection, made of titanium nitride aluminum. These models, although expensive, are extremely durable and hard-wearing and can be used to cut high abrasive metal.
- Forezienne is a French brand that produces band saws made of steel from enriched ore. Quenching and tempering, hot and cold rolling alternate during the forming process, making the company’s saws one of the best in their segment.
- Lennartz. worldwide producer of composite alloy saw blades. The technique of saws manufacturing involves making the blade and hardening it from extra-hard steel, as well as welding a serrated edge from high-speed steel.
- “Rospil” is a Russian manufacturer, producing bimetal and carbide band saw blades for metalworking. Blades are made of high-speed steel, nickel and titanium alloys, as well as cold and hot-rolled construction steel.
Tooth pitch or TPI.
Blades for log and bandsaw machines should have coarse teeth, and as a rule, the distance between teeth (tooth pitch) is within the range of 19-27 mm. Blades for joinery have medium and fine tooth pitch and tooth pitch varies from 1 to 12mm. For wood band saw blades, tooth pitch is constant throughout the blade. TPI (Teeth Per Inch) was developed as a standardization measure in which the pitch is determined by the number of teeth per inch of blade. For example, 1 TPI = 25, 4 mm, and 10 TPI = 2.5 mm. Higher TPI means lower productivity, but a cleaner kerf.
How to choose band saw blades for metal
It is economically profitable to cut metal in production scale with band saw blades. A great variety of metals and alloys require a properly selected tool that can perform the task at high productivity and accuracy; with minimum energy consumption and loss of valuable metal; the cutting equipment of the tool must be durable. Metal band saw blades have all of these properties.
Selecting a band saw blade
In order to buy the right tool you need to check it against a number of parameters. This prudence ensures a straight cut line, no cracks or chips on the workpiece. There are several types of blades available for the cutting tool, which are designed for the work:
The harder the raw material of the workpiece, the denser the alloy of the cutting part. Composite and hard alloys, steel, and band saws are used in manufacturing.
How to choose a band saw for metal?
Working with different metal workpieces requires certain types of blades:
- for cutting high-carbon steels. tools made of composite alloys, M-51 model;
- Low and medium carbon steels. bimetal band saw blade M-42;
- for continuous cutting of high-temperature steels. model SP;
- cutting of titanium blanks and nickel alloys. tools of TST type.
How to find the width of the blade
Wood and metal band saw blade sizes need to be selected for the application. Tool width varies from 14 to 80 mm. 31-41 mm cutting blades are considered standard.
The wider the blade, the smoother the cut. So in the absence of instructions for conventional cutting choose the widest blade that is suitable for the band saw. The material will feed as quickly as possible in this case.
For a contour cut, choose a saw narrow enough to cut corners and shapes in the material.
The teeth of a band saw: basic parameters
Number of teeth. The first thing to look for is the number of teeth. In determining this parameter, take into account:
- The more teeth the smoother the cut on thick-walled material;
- Smaller tooth densities result in less stress being placed on the work area;
- Many cutting edges distribute the stress of the operation over the entire saw’s surface.
Tooth size. Keep in mind the following guidelines when determining tooth sizes.
- Standard tooth sizes are best for cutting thin material and shape cutting.
- Large teeth are designed for deep cuts.
- Low-height cutting edges are the best choice for cutting thin-walled sheets.
Tooth pitch of band saw blade must coincide with the parameters of the mating part on the machine. It is most reasonable to use the following recommendations when choosing a tool:
- Large, constant pitch suitable for cutting thin-walled sheets;
- Frequent evenly spaced toothing is good for cutting large sheets of material;
- Bands with variable teeth are suitable for machining soft material (plastic, non-ferrous metal, wood).
Image : Determining the tooth pitch of a band saw
Tooth pitch recommendations for various types of rolled material (solid billets, sections, sheets, tubes) are provided by the manufacturer in addition to the product range.The pitch of the teeth determines the quality of material cutting, the vibration level during the operation and the cutting speed of the tool.
Picture : Bandsaw tooth patterns
According to this parameter all blades are divided into 3 groups.
- Wavy profile. Teeth are waved along the full length of the band saw blade, with different slant angles. The corrugated profile is used for cutting thin materials and smaller workpieces.
- Standard Set. Edge elements are arranged alternately on both sides, with one tooth in the center. Standard set-up is suitable for sawing large metal sections on horizontal machines, contour cutting and material processing on equipment with vertical feed.
- Group setting. Edge teeth arranged in pairs on the left and right side. These tools give the best possible cutting speed and a clean cut with minimal strain on the cutting part.
The quality of resharpening is measured by eye based on these criteria:
Important! Check when purchasing if the blade can be sharpened and how many cutting edge regeneration cycles are allowed.
Tape blades for woodworking
The durability and high performance of Munkforssagar band saws are due to the unique processes of profile grinding and heat treatment of the blade and the saw tooth itself
Quenched saw teeth are hardened using modern high-tech equipment, this allows to exactly maintain the hardness of the teeth, and therefore increase the service life of the saw
Tooth preparation: sharpened, bored, HSS solder
For handling hardwood, frozen, and dirty wood
Cutting tooth part made of HSS M42 high speed steel. Hardness of HSS: 63-67 HRC
Body of saw blade is made of alloyed tool steel, hardness of which: 43-45 HRC
CUTS FASTER AND LASTS LONGER THAN SOLID CARBON STEEL BLADES. Two-piece steel construction for longer cutting life
HAS ENHANCED THERMAL AND WEAR RESISTANCE. Cutting part of the tooth is enriched with cobalt
Significantly reduce saw maintenance costs (sharpening, setting)
ENSURES STABLE AND RELIABLE OPERATION
Tooth preparation: sharpened, set, hardened
Suitable for hard and soft materials
Saws are designed for longitudinal sawing of wood
Cutting part: continuous double-ground
Made of alloyed tool steel
Double cutter blade resharpening. similar to the kitchen knife
The quality of MFS band saws is exceptional. Tooth profile, pitch, adjusted to tenths of a millimeter so that the sharpener can be quickly and accurately set up
Tooth preparation: sharpened, set, hardened
Suitable for hard, soft and plate materials
The high-quality tooth ensures the Pilana band saw blade long service life until resharpening
High-quality band saw blade minimizes cutting vibrations, ensuring high cutting precision and a clean cut
High band saw blade quality cuts wood, plywood and chipboard without splintering or misalignment
High-quality band saw teeth guarantee their long life and minimize the possibility of their loss while working (splintering from the band saw blade)
High-quality laser engraved markings ensure that the technical parameters of the band saws remain the same when they are reordered
Precise front and back angle setting guarantees the quality of cut and a long life of the Pilana band saw blade
Sharpening the band saw teeth several times to save your money
Tooth preparation: sharpened, set, hardened
Tooth preparation: stelliting, TV. alloy
Wood band saw blades. replaceable cutting equipment for sawmills, band saws used in locksmith and furniture making, construction.
Saws are part of the multi-cutting group and are a closed, flexible band with a single cutting edge equipped with sharp teeth. The saws are used to produce curved. and straight cut.
Saw blades are indispensable. whether carving or making furniture, toys, utensils. They can withstand heavy loads, quickly make an even straight and angled cut. At the same time the formation of chips and sawdust is minimal.
Pilana Metal. bi-metal band saw blades
Bandsaw blades differ in type and material. For example, in addition to carbon steel, they can be bimetallic, equipped with a spring base, as well as carbide steel teeth. The product can be monolithic or have welded teeth made of other materials. High-carbon steel versions are used for cutting a wide range of unalloyed and alloyed alloys. Despite this, bimetallic counterparts are more popular with the buyer, being distinguished by technical and performance characteristics.
Buyers especially like products with teeth made of high-speed steel. These blades have proven themselves in the field. They maintain the performance and durability of the band saw equipment. Operational and quality characteristics of such blades are high.
Classification by the type of material used in processing allows to divide cutting blades into 4 types: for work with stone, metal, wood and materials of synthetic origin. In order to choose the right type of blade correctly, you must pay attention to what it is designed for. This will allow the operation of the product to perform a high-quality cut, without splintering and cracking. Here it is worth noting the main principle: the denser the alloy of the sawing edge, the harder the raw material of the workpiece should be.
For example, when a blade is bought to work with blanks made of titanium or nickel alloy, it is worth choosing TST ring belts. If the craftsman works on equipment for cutting high-carbon steel, you should buy a blade of composite alloy. When cutting low-carbon steel parts, it is necessary to buy bimetallic bands. When you plan to make long cuts while working with high-temperature resistant steel alloys, it makes sense to buy SP.
Blades for metal band saws: types and characteristics, what is the best to buy
Active development of advanced scientific technologies enables manufacturers to create unique band saw blades that best meet the requirements of consumers.
Several types of band saw blades are currently available to customers.
Bimetal. The blade consists of two parts: the base and the cutting part. Base material is made of low-cost steel, teeth are made of high-alloyed, extremely hard metals. This approach increases the life of the band saw blade while reducing its cost.
For low-speed equipment it is recommended to choose saw blades made of carbon tool steel, hardness of teeth can be improved by hardening. Such saws belong to the category of the cheapest, but have limited technical characteristics. Bimetal saws are recommended for high-speed machines; their cutting edge is made of high-alloy grades and the base is made of spring steel. Their working life. Recommended cutting conditions are fulfilled. Ten times longer than conventional blades.
Steel grades with high fatigue resistance reduce vibrations when cutting metal, give excellent cutting precision and cleanliness of cut. Specially shaped and dimensioned teeth decrease the kerf. less energy loss and unproductive waste.
Recommendations for the use of drawstring blades
Getting Started. Running-in of the draw frame: A very important point, because the service life of the draw frame depends mainly on a controlled running-in procedure. Sharpened pencil will break at once, unlike sharp but slightly blunted one, the same principle is used for blade preparation. First let the web run in on the machine sheaves by running it idle in the air for approx. five minutes. Then, at a lower blade speed, about 70% of the recommended speed and 50% of the recommended feed speed, saw the workpieces for about fifteen minutes, and only then bring the speed of rotation and feed to normal. 2. Blade tension: Please refer to the instructions for use for the band saw. Professional and industrial band saw models are equipped with integrated strain gauges to determine the tension in the bandsaw blade. It is important not to overtighten the blade since overtightening can significantly reduce resistance and may lead to a bursting of the band at the weld or to cracks. If the blade is not taut enough there will be a deviation from the perpendicular sawing plane and a curved kerf. 3. Web operation: The correct choice of cutting conditions is indicated by the absence of excessive cutting vibrations and the type of chips. For optimum cutting results each tooth on the bandsaw blade needs to cut a certain thickness of chips. Practically the feed is chosen according to the recommendations of the equipment producers or by the type of chips that are obtained during cutting. Increase the band speed or lower the cutting speed if fine or dusty chips are present. Slightly curled chips indicate a correct cutting action. Thick or bluish chips indicate excessive feed rate or lower than necessary cutting speed. Also important. Do not overheat the blade cutting material, it means that intensive watering of the blade, cutting zone and material to be sawn. On appearance of vibrations decrease the feed rate. Check the quality of the cutting surface; burrs and cavities may be the result of an incorrectly chosen pitch, cutting conditions or blade wear. 4. Blade rest: The blade resting allows a redistribution of fatigue stresses that occur during cutting, preservation of the material properties and increase of the life of the tool. In intensive work throughout the day, it is better to work with two blades, one before lunch and one after. At the end of the day it is absolutely necessary to loosen the tension of the blade, or better yet take the blade off the machine, and after turning it inside out, hang it on the hook.