advancing cutting tool production with electrical discharge grinding |
 

 modern machine shop

advancing cutting tool production with electrical discharge grinding | modern machine shop

Electrical discharge grinding (EDG) enables manufacturers to produce cutting tools with stable cutting edges and complex features out of very hard materials like polycrystalline diamond (PCD). The process uses a copper electrode to produce micro sparks that erode away the binder material.

In order to effectively machine metal, cutting tools are made of hardmaterials like PCD (polycrystalline diamond). However, hard materials are hard to machine; it can be challenging to transform these materials into cutting tools that have sharp, stable cutting edges and complex features like flutes and gashes, especially through mechanical processes like grinding. PCD can be more easily eroded via processes like electrical discharge grinding (EDG) because the diamond is held in an electrically conductive binder material such as cobalt. The process works by using a copper electrode on the super abrasive material and binders, explains Tom Nathan, EDG product manager at ANCA. It uses micro sparks to erode away the binder, rather than using a wheel to mechanically grind away the material. Use of a wheel-shaped electrode instead of a static electrode, such as in wire or sinker EDM, gives users the ability to create the same complex geometries that five-axis grinding machines can, enabling the production of 3D features such as flutes, gashes and reliefs on all types of drills, end mills, reamers and profile tools.

But the speed of the EDG process and quality of cutting tools it can produce have been limited by factors including spark generation and erosion parameters. By expanding the power range and introducing new intelligent erosion control features, ANCAs EDG machines are designed to help users produce better cutting tools, faster, potentially advancing the efficiency with which cutting tool makers can now produce PCD tools.

ANCAs EDG machines feature a SparX Erosion generator, which gives users access to a wider power range. This enables ultra-fine finishing operations that can improve cutting tool performance, and heavy roughing operations that can decrease cycle times.

For the erosion generator in its EDG machines, ANCA turned to sister company ANCA Motion to develop the SparX Erosion generator, which is designed to give users access to a wider range of power than other systems. This wider power range enables ultra-fine finishing operations that can produce parts with good surface quality. What we've found recently with our erosion processes is that we can easily get our surface roughness to under 0.1 micron RA, Nathan says. Good surface finish means sharper cutting edges, which enables tools to perform better and last longer. On the other end of the power spectrum, the new erosion generator can handle heavy roughing operations that increase material removal rates and decrease cycle times in cutting tool manufacturing by as much as 50%, the company says.

The EDG process is optimized for PCD, but PCD cutting tools include other materials as well. The PCD is placed along the cutting edges of the tool, while the rest of it is made up of another material, such as carbide.If the PCD is in areas that it's not cutting, it's not doing any work, and it's more expensive than regular carbide or high speed steel to manufacture and form, Nathan notes.In order to be able to machine multiple materials,ANCAs EDG machines combine both traditional grinding and EDG capabilities in a single platform. We grind all of the operations that don't require erosion, so that would be, say the fluting in a helical tool, and then we use the erosion process to do all the cutting edges, he explains.

PCD cutting tools have a carbide backing that is often over-eroded during EDG processes, making the tool more likely to break. ANCAs Adaptive Spark Control feature can determine whether the machine is eroding PCD or carbide, and automatically optimize the spark parameters for each material.

But eroding the area where the PCD and carbide binder meet can pose a challenge. Nathan explains that theres usually a 0.6 mm layer of PCD with a 1 mm layer of carbide underneath. The bit where they meet is called the undercut, and the reason it's called the undercut is, traditionally, when you erode from PCD to carbide, the system wants to over-erode the carbide because it's much more conductive, so you get a lot of undercut at the carbide-PCD border. He says the result is similar to digging underneath a footpath. Its easier to dig below the footpath than it is to dig through the footpath, but if you dig underneath it deep enough, the footpath will collapse in because theres nothing below to support it.

In order to solve this problem, ANCA has developed a feature called Adaptive Spark Control (ASC). It can sense what substrate it's eroding (PCD or carbide), and it can change the spark profile to be optimized for each material, Nathan explains. It does this by gaging the voltage, current and resistance of the sparks its generating. The system uses this data to determine if its eroding carbide or PCD and adjusts itself accordingly. By optimizing the sparking for each material, the undercut is reduced, which increases the strength of the tool so its less prone to chipping, which in turn increases tool life. As an example, Nathan described one of ANCAs customers, which was producing drills for carbon fiber-reinforced plastics. Using its previous tool grinding system, the company was getting 3 or 4 holes per drill point. After implementing Adaptive Spark Control, the number of holes per drill increase to 44. It was a huge increase in productivity and effectiveness of those tools from that one feature, he says.

Traditionally, EDG processes use a set feed rate, which can move too quickly or too slowly. Intelligent Adaptive Control, developed by ANCA, helps reduce air time, when the gap is too wide to erode the workpiece, while preventing contact between the wheel and the part.

Figuring out feed rates can also be a challenge for users of EDG. If you have a dumb process, which is just using the erosion parameters, it's moving forward at a set feed rate, Nathan says. In many instances, it will be traveling too slowly, and you're just wasting time. In other instances, you will be traveling too quickly, and you will risk actually hitting into the PCD material, which is also not good. And when the electrode moves in five axes, as it does in EDG, determining feed rates becomes even more complicated.

In order to help optimize feed rates and speed up the EDG process, ANCA developed a featured called Intelligent Adaptive Control (IAC). It reduces the airtime when you're not actually eroding anything because the erosion gaps too wide, Nathan explains. According to the company, this can reduce air time by as much as 30%. It also helps prevent contact between the wheel and part, which can damage both. It's really essentially important for creating micro tools, because if the wheel contacts the tool, it will snap the tool, he adds.

Micro-tools (tools than are less than 0.5 mm) are a major application for ANCAs EDG systems, Nathan says. The company is currently seeing high demand for these capabilities in Asian markets. They use a lot of ceramics in their Printed Circuit Boards (PCBs), and ceramics are very aggressive, he says. Because of that, markets are moving more towards PCD-type tools. He adds that the company is also seeing inquiries from European and American markets for micro-tools for medical and aluminum applications as well.

choosing the right grinding wheel |
 

 modern machine shop

choosing the right grinding wheel | modern machine shop

Grinding wheels are generally labeled with a maximum safe operating speed. Don't exceed this speed limit. The safest course is not even to mount a given wheel on any grinder fast enough to exceed this limit.

In a grinding wheel, the abrasive performs the same function as the teeth in a saw. But unlike a saw, which has teeth only on its edge, the grinding wheel has abrasive grains distributed throughout the wheel. Thousands of these hard, tough grains move against the workpiece to cut away tiny chips of material.

Abrasive suppliers offer a wide array of products for a wide array of grinding applications in metalworking. Choosing the wrong product can cost the shop time and money. This article presents some of the fundamentals of selecting the best grinding wheel for the job.

Grinding wheels and other bonded abrasives have two major components-the abrasive grains that do the actual cutting and the bond that holds the grains together and supports them while they cut. The percentages of grain and bond and their spacing in the wheel determine the wheel's structure.

The particular abrasive used in a wheel is chosen based on the way it will interact with the work material. The ideal abrasive has the ability to stay sharp with minimal point dulling. When dulling begins, the abrasive fractures, creating new cutting points.

Aluminum oxide is the most common abrasive used in grinding wheels. It is usually the abrasive chosen for grinding carbon steel, alloy steel, high speed steel, annealed malleable iron, wrought iron, and bronzes and similar metals. There are many different types of aluminum oxide abrasives, each specially made and blended for particular types of grinding jobs. Each abrasive type carries its own designation-usually a combination of a letter and a number. These designations vary by manufacturer.

Zirconia alumina is another family of abrasives, each one made from a different percentage of aluminum oxide and zirconium oxide. The combination results in a tough, durable abrasive that works well in rough grinding applications, such as cut-off operations, on a broad range of steels and steel alloys. As with aluminum oxide, there are several different types of zirconia alumina from which to choose.

Ceramic aluminum oxide is the newest major development in abrasives. This is a high-purity grain manufactured in a gel sintering process. The result is an abrasive with the ability to fracture at a controlled rate at the sub-micron level, constantly creating thousands of new cutting points. This abrasive is exceptionally hard and strong. It is primarily used for precision grinding in demanding applications on steels and alloys that are the most difficult to grind. The abrasive is normally blended in various percentages with other abrasives to optimize its performance for different applications and materials.

Once the grain is known, the next question relates to grit size. Every grinding wheel has a number designating this characteristic. Grit size is the size of individual abrasive grains in the wheel. It corresponds to the number of openings per linear inch in the final screen size used to size the grain. In other words, higher numbers translate to smaller openings in the screen the grains pass through. Lower numbers (such as 10, 16 or 24) denote a wheel with coarse grain. The coarser the grain, the larger the size of the material removed. Coarse grains are used for rapid stock removal where finish is not important. Higher numbers (such as 70, 100 and 180) are fine grit wheels. They are suitable for imparting fine finishes, for small areas of contact, and for use with hard, brittle materials.

To allow the abrasive in the wheel to cut efficiently, the wheel must contain the proper bond. The bond is the material that holds the abrasive grains together so they can cut effectively. The bond must also wear away as the abrasive grains wear and are expelled so new sharp grains are exposed.

There are three principal types of bonds used in conventional grinding wheels. Each type is capable of giving distinct characteristics to the grinding action of the wheel. The type of bond selected depends on such factors as the wheel operating speed, the type of grinding operation, the precision required and the material to be ground.

Most grinding wheels are made with vitrified bonds, which consist of a mixture of carefully selected clays. At the high temperatures produced in the kilns where grinding wheels are made, the clays and the abrasive grain fuse into a molten glass condition. During cooling, the glass forms a span that attaches each grain to its neighbor and supports the grains while they grind.

Grinding wheels made with vitrified bonds are very rigid, strong and porous. They remove stock material at high rates and grind to precise requirements. They are not affected by water, acid, oils or variations in temperature.

Some bonds are made of organic substances. These bonds soften under the heat of grinding. The most common organic bond type is the resinoid bond, which is made from synthetic resin. Wheels with resinoid bonds are good choices for applications that require rapid stock removal, as well as those where better finishes are needed. They are designed to operate at higher speeds, and they are often used for wheels in fabrication shops, foundries, billet shops, and for saw sharpening and gumming.

Another type of organic bond is rubber. Wheels made with rubber bonds offer a smooth grinding action. Rubber bonds are often found in wheels used where a high quality of finish is required, such as ball bearing and roller bearing races. They are also frequently used for cut-off wheels where burr and burn must be held to a minimum.

The strength of a bond is designated in the grade of the grinding wheel. The bond is said to have a hard grade if the spans between each abrasive grain are very strong and retain the grains well against the grinding forces tending to pry them loose. A wheel is said to have a soft grade if only a small force is needed to release the grains. It is the relative amount of bond in the wheel that determines its grade or hardness.

Hard grade wheels are used for longer wheel life, for jobs on high-horsepower machines, and for jobs with small or narrow areas of contact. Soft grade wheels are used for rapid stock removal, for jobs with large areas of contact, and for hard materials such as tool steels and carbides.

The wheel itself comes in a variety of shapes. The product typically pictured when one thinks of a grinding wheel is the straight wheel. The grinding facethe part of the wheel that addresses the workis on the periphery of a straight wheel. A common variation of the straight wheel design is the recessed wheel, so called because the center of the wheel is recessed to allow it to fit on a machine spindle flange assembly.

On some wheels, the cutting face is on the side of the wheel. These wheels are usually named for their distinctive shapes, as in cylinder wheels, cup wheels and dish wheels. Sometimes bonded abrasive sections of various shapes are assembled to form a continuous or intermittent side grinding wheel. These products are called segments. Wheels with cutting faces on their sides are often used to grind the teeth of cutting tools and other hard-to-reach surfaces.

Mounted wheels are small grinding wheels with special shapes, such as cones or plugs, that are permanently mounted on a steel mandrel. They are used for a variety of off-hand and precision internal grinding jobs.

A number of factors must be considered in order to select the best grinding wheel for the job at hand. The first consideration is the material to be ground. This determines the kind of abrasive you will need in the wheel. For example, aluminum oxide or zirconia alumina should be used for grinding steels and steel alloys. For grinding cast iron, non-ferrous metals and non-metallic materials, select a silicon carbide abrasive.

Hard, brittle materials generally require a wheel with a fine grit size and a softer grade. Hard materials resist the penetration of abrasive grains and cause them to dull quickly. Therefore, the combination of finer grit and softer grade lets abrasive grains break away as they become dull, exposing fresh, sharp cutting points. On the other hand, wheels with the coarse grit and hard grade should be chosen for materials that are soft, ductile and easily penetrated.

The amount of stock to be removed is also a consideration. Coarser grits give rapid stock removal since they are capable of greater penetration and heavier cuts. However, if the work material is hard to penetrate, a slightly finer grit wheel will cut faster since there are more cutting points to do the work.

Another factor that affects the choice of wheel bond is the wheel speed in operation. Usually vitrified wheels are used at speeds less than 6,500 surface feet per minute. At higher speeds, the vitrified bond may break. Organic bond wheels are generally the choice between 6,500 and 9,500 surface feet per minute. Working at higher speeds usually requires specially designed wheels for high speed grinding.

The next factor to consider is the area of grinding contact between the wheel and the workpiece. For a broad area of contact, use a wheel with coarser grit and softer grade. This ensures a free, cool cutting action under the heavier load imposed by the size of the surface to be ground. Smaller areas of grinding contact require wheels with finer grits and harder grades to withstand the greater unit pressure.

Next, consider the severity of the grinding action. This is defined as the pressure under which the grinding wheel and the workpiece are brought and held together. Some abrasives have been designed to withstand severe grinding conditions when grinding steel and steel alloys.

Grinding machine horsepower must also be considered. In general, harder grade wheels should be used on machines with higher horsepower. If horsepower is less than wheel diameter, a softer grade wheel should be used. If horsepower is greater than wheel diameter, choose a harder grade wheel.

They should always be stored so they are protected from banging and gouging. The storage room should not be subjected to extreme variations in temperature and humidity because these can damage the bonds in some wheels.

Wheels should be handled carefully to avoid dropping and bumping, since this may lead to damage or cracks. Wheels should be carried to the job, not rolled. If the wheel is too heavy to be carried safely by hand, use a hand truck, wagon or forklift truck with cushioning provided to avoid damage.

Before mounting a vitrified wheel, ring test it as explained in the American National Standards Institute's B7.1 Safety Code for the Use, Care and Protection of Grinding Wheels. The ring test is designed to detect any cracks in a wheel. Never use a cracked wheel.

Always use a wheel with a center hole size that fits snugly yet freely on the spindle without forcing it. Never attempt to alter the center hole. Use a matched pair of clean, recessed flanges at least one-third the diameter of the wheel. Flange bearing surfaces must be flat and free of any burrs or dirt buildup.

Tighten the spindle nut only enough to hold the wheel firmly without over-tightening. If mounting a directional wheel, look for the arrow marked on the wheel itself and be sure it points in the direction of spindle rotation.

Always make sure that all wheel and machine guards are in place, and that all covers are tightly closed before operating the machine. After the wheel is securely mounted and the guards are in place, turn on the machine, step back out of the way and let it run for at least one minute at operating speed before starting to grind.

Grind only on the face of a straight wheel. Grind only on the side of a cylinder, cup or segment wheel. Make grinding contact gently, without bumping or gouging. Never force grinding so that the motor slows noticeably or the work gets hot. The machine ampmeter can be a good indicator of correct performance.

If a wheel breaks during use, make a careful inspection of the machine to be sure that protective hoods and guards have not been damaged. Also, check the flanges, spindle and mounting nuts to be sure they are not bent, sprung or otherwise damaged.

The grinding wheel is one component in an engineered system consisting of wheel, machine tool, work material and operational factors. Each factor affects all the others. Accordingly, the shop that wants to optimize grinding performance will choose the grinding wheel best suited to all of these other components of the process.

Because carbides, high speed steels, PCD, PCBN, ceramics and some other materials used to make cutting tools can be nearly as hard as conventional abrasives, the job of sharpening them falls to a special class of abrasives-diamond and the CBN, the superabrasives.

These materials offer extreme hardness, but they are more expensive than conventional abrasives (silicon carbide and aluminum oxide). Therefore, superabrasive grinding wheels have a different construction than conventional abrasive wheels. Where a conventional abrasive product is made up of abrasive all the way through, superabrasive wheels have abrasive on the cutting edge of the wheel that is bonded to a core material, which forms the shape of the wheel and contributes to the grinding action.

Superabrasive wheels are supplied in the same standard grit range as conventional wheels (typically 46 through 2,000 grit). Like other types of wheels, they can be made in a range of grades and concentrations (the amount of diamond in the bond) to fit the operation.

There are four types of bond used in superabrasive wheels. Resinoid bond wheels are exceptionally fast and cool cutting. They are well-suited to sharpening multi-tooth cutters and reamers, and for all precision grinding operations. Resin is the "workhorse" bond, most commonly used and most forgiving. Vitrified bond wheels combine fast cutting with a resistance to wear. They are often used in high-volume production operations. Metal bond wheels are used for grinding and cutting non-metallic materials, such as stone, reinforced plastics and semiconductor materials that cannot be machined by other cutting tools. Single-layer plated wheels are used when the operation requires both fast stock removal and the generation of a complex form.

Wire EDM units that swivel a horizontally guided electrode wire in a CNC-controlled E axis give this shop the workpiece clearance and flexibility to produce complex, high-precision PCD-tipped cutting tools.

It sounds like a contradiction in terms-between centers and centerless grinding on one machine. But for some categories of workpieces, it's a viable production process that can yield machining time reductions of 45 percent over separate grinding operations.

welding & fabrication - chicago, illinois - american grinding & machining company

welding & fabrication - chicago, illinois - american grinding & machining company

American Grinding & Machine Company is one of the largest flat grinding shops in the country. We have twenty-two large surface grinding machines at your service. Welding represents another one of our divisions. We manufacture a heavy-duty steel base or table called the "BRUTE" Base, which is available in six standard shapes, or it can be completely customized to your needs. We fabricate all types of weldments from small pieces up to 20 tons.

AMERICAN GRINDING & MACHINE COMPANY2000 North Mango Avenue Chicago, Illinois 60639-2899 Call: 773.889.4343 | Fax: 773.889.3781 E-Mail: [email protected] www.americangrinding.com

brute heavy duty machine bases - chicago, illinois - american grinding & machine company

brute heavy duty machine bases - chicago, illinois - american grinding & machine company

American Grinding's Brute Heavy Duty Machine Bases support some of the world's largest, most impressive machines and robotic devices. Our bases are used in just about any situation, in every industry from the smallest base to some of the largest in the world. American Grinding's quality stands alone. Compare our quality and the appearance of our base to any other, and you'll see the difference. That's why American Grinding has been the leader in machine bases for years. Following are just some of the things that make them so popular:

The walls are made out of either 11 gauge or 3/16 inch thick steel. and has a standard Blanchard ground top plate. It is shot blasted and painted gray enamel. The foot pads are standard and they are drilled and tapped for your convenience.

AMERICAN GRINDING & MACHINE COMPANY2000 North Mango Avenue Chicago, Illinois 60639-2899 Call: 773.889.4343 | Fax: 773.889.3781 E-Mail: [email protected] www.americangrinding.com

machine ways, rails, shear blade | detroit edge tool company

machine ways, rails, shear blade | detroit edge tool company

Detroit Edge Tool Company (DETCO) is a leading supplier of machine ways & rails, shear knives, surface grinding, large CNC machining, machine knives, flame hardening, wear plates & liners to industries globally, all while maintaining the values and commitment of a family-owned American manufacturing company.

hardinge - turning, milling, grinding & workholding

hardinge - turning, milling, grinding & workholding

Hardinge has become a leader in grinding solutions with product lines like Kellenberger, Voumard, Hauser USACH and more. With offerings across the capability spectrum, let Hardinge be your partner for all your grinding needs.

By the use of most modern manufacturing means next generation technology is being created, which can meet the customers technical and economical requirements today and tomorrow. Wherever highly accurate grinding is required, Kellenberger precision grinding machines are in use

Voumard has been a leader in innovative ID/OD machines that can support small batch and production environments. Its product offerings represent multi-purpose, flexible and universal solutions for your ID/OD grinding requirements.

Hauser multi-axis jig grinding machines are specially developed for applications requiring complex double curvature profiles where very high standards of surface finish and accuracy are essential. Hauser machines are ideal for super-finished applications where accuracy must not be compromised.

Our focus is to address the demands of companies looking for a partner to help them find solutions to todays challenging, high precision grinding applications and automation projects. When a custom grinding solution is what you require, Usach can be your partner.

For over 100 years, Hardinge lathes have been and will continue to be a standard for quality, longevity and capability. Whether it is high volume production or holding tight tolerances, Hardinge can provide you with the right CNC lathe solution every time.

Our Gang Plate/Gang Turret line of CNC lathes gives you not only the productivity you demand for lean manufacturing but also the Hardinge-exclusive patented interchangeable tool top plate to dramatically reduce setup and cycle times.

Through our Bridgeport brand of vertical machining centers, Hardinge continues to set the milling standard around the globe. Our milling machines are designed to achieve maximum capacity and performance in a variety of industries and manufacturing environments.

The Bridgeport Series 1 Standard Mill the original, all-purpose mill has been the real thing in milling, drilling, and boring for metalworking shops throughout the world. Today, the Series I Standard continues to fulfill the industrys need for an accurate, reliable, and versatile mill.

We have various product offerings of 3 Axis capable CNC mills that can fit a variety of manufacturing requirements. We have a product portfolio that satisfies versatility, performance, or production needs.

An investment in Bridgeports latest generation of 5-Axis vertical machining centers will bring instant and positive results. Our unrivalled technology coupled with an unswerving commitment to improving our customers productivity and business performance have contributed to a large, and loyal, customer base.

Hardinge and its reputable portfolio of products, resources, knowledge and experience are ready to tackle your next machining challenge. As the only machine tool OEM provider offering turning, milling, grinding, workholding and custom manufacturing solutions, Hardinge is ideally positioned to provide you with an innovative, cost-effective custom solutions that meets your needs.

The diverse products we offer enable us to support a variety of market applications in industries including aerospace, agricultural, automotive, construction, consumer products, defense, energy, medical, technology, transportation and more.

Hardinge Inc. is a leading international provider of advanced metal-cutting solutions. We provide a full spectrum of highly reliable CNC turning, milling, and grinding machines as well as technologically advanced workholding and machine tool accessories.

SUPER-PRECISION is a combination of best practice design and manufacturing of hardware and software integrated into a machine tool that produces the highest level of precision turning centers for production that require the least amount of human intervention in the marketplace today.

The tight tolerances that we need to achieve are as low as 0.0002 on some turned parts and bored holes. Our newest Hardinge machine gave us the ability to perform multiple machining operations in a single setup.

We use them for all of our turning and live tooling operations on various tool steels and 400 series stainless materials both annealed and hardened. We consistently achieve tolerances of .0002 and RMS finishes of 10-15 uin from our SUPER-PRECISION Hardinge CNC turning centers.

grinding equipment_henan zhengzhou mining machinery co., ltd

grinding equipment_henan zhengzhou mining machinery co., ltd

Dolomite Mill can be used to grind and process variety kinds of non-flammable and non-explosive materials with hardness less than 7 and humidity less than 6% such as dolomite, limestone, gypsum, barite, carbonate calcium, etc, in mining, construction, chemical industry, etc.

Dolomite Mill is ideal grinding machine to grind and process dolomite, and the fine powder size can be 40 mesh to 325 mesh for industry usage. The powder output size of dolomite mill(Raymond Mill) can be adjusted continuously according to the customers' demand.

1.The whole dolomite mill plant (Raymond Mill) is vertical structure of strong systematic characteristic, so it occupies small area. From crushing of dolomite to grinding and packing is an independent production system.

1.The whole dolomite mill plant (Raymond Mill) is vertical structure of strong systematic characteristic, so it occupies small area. From crushing of dolomite to grinding and packing is an independent production system.

american grinding & machine co. chicago, illinois, il 60639-2899

american grinding & machine co. chicago, illinois, il 60639-2899

Manufacturer of heavy duty machine bases, carts, tables, steel plates and robot pedestals. Works with carbon steel, stainless steel, hardened tool steel, brass, bronze, copper, aluminum, cast iron, cast aluminum, Inconel, Monel, Hastelloy, Kovar, plastic and rubber. Also a distributor of abrasives including grinding, diamond and CBN wheels, diamond dressers, coolants, diamond rolls and cutting tools. Welding, grinding, flame cutting and fabrication services are available. Additional services such as stress relieving, blasting, painting, packaging and shipping are also provided. Small volume production offered. Serves the automation, automotive, aircraft and food industries.

About American Grinding American Grinding was founded in 1941 by brothers William and Karl Kuchar. Today, the company is managed by the third generation of family members: Greg Leonard. American Grinding combines the latest in computer-aided design technologies with the tradition of old-world craftsmanship the company was built upon. American Grinding specializes in rotary grinding, bar grinding, surface grinding, flame-cut steel plate, weldments, as well as machine and robotics bases, including our popular Brute heavy duty machine base. We aim to provide prompt and competitive quotations, exceptional service and precision at every turn to ensure that your orders are crafted and shipped per your exacting specifications.

The Thomas Verified Supplier badge indicates that Thomas has confirmed the company operates in North America, provides accurate business information on the Thomasnet.com supplier discovery platform, has undergone a complete review and validation of all products and services currently offered, and are open to quoting new opportunities.

Copyright 2021 Thomas Publishing Company. All Rights Reserved. See Terms and Conditions, Privacy Statement and California Do Not Track Notice. Website Last Modified July 10, 2021. Thomas Register and Thomas Regional are part of Thomasnet.com. Thomasnet Is A Registered Trademark Of Thomas Publishing Company.

about us - henan fair machinery co.,ltd

about us - henan fair machinery co.,ltd

Henan Fair Machinery Co.,Ltd specializes in the R&D and production of high quality practical grinding and mixing machinery since 1997. We started as a small operation, but now have become one of the leading suppliers in the Grinding and mixing Machinery industry in China. Today, Henan Fair Machinery has been one of the top producers of quality Grinding and mixing Machinery products.

Our company is specializing in the production of dry powder mixer machine, grinding mill, Horizontal Grinder, dispersion mixer, Dry mortar production line, Packing machine, Screw elevator, Stock Silo, Sand Dryer, dust collector etc single machine and production line are widely used in construction, mining, chemical industry, building materials, feed, powder mortar, metallurgy, environmental protection and other fields.

Henan Fair Machinery Co. Ltd. is located in Zhengzhou city which China's transportation hub city. Covering an area of 50,000 square meters. Our company is committed to making Chinese products take roots all over the world and contribute to the development of human happiness, Has helped nearly 2,000 people find jobs directly or indirectly. Company product sales network throughout the country and the world more than 30 countries and regions, Help liberate human labor and make global customers more rich. deeply domestic and foreign customers trust and praise.

We always feel that all success of our company is directly related to the quality of the products we offer. They meet the highest quality requirements as stipulated in ISO9001, SGS, CE guidelines and our stringent quality control system.

1) We have 4 year foreign trade experience and more than 20 years machine producing in this aera,our customers are from USA,UK,India,Colombia, Spain,Ecuador,Europe etc.The real production plant of 200 workers has the most professional technology and team. Price is more advantageous.

ntc america custom cnc machines

ntc america custom cnc machines

NTC is a global leader in Machining Centers, Transfer Machines, Crankshaft Milling Machines, Grinding Machines, and Wire Cutting Saws. It is the premier supplier for machine shops specializing in aftermarket parts and prototypes to large automotive manufacturers.

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