Golf clubs, and a matched set of golf clubs, with each golf club having a hollow shaft with a head end and grip end. A resilient grip is fitted about the grip end of each shaft, and the grip has a butt end and a forward end and a midpoint there between. A clubhead is secured to the head end of each shaft. A frictionally-dissipative, vibration-damping tungsten alloy counterweight (dash pot) is positioned within each hollow shaft (except for that of the 1-wood or driver) at the grip end thereof. The tungsten alloy counterweight is at least substantially entirely contained between the midpoint and the butt end of the grip. The various tungsten alloy counterweights are sized to position the center of gravity of each individual club a selected distance from the head end of the hollow shaft of the individual club, such that the selected distance does not decrease for successively shorter clubs in the matched set.

Any additional weight in a golf club can only retard a club's swing speed at impact, and that any weight not in the clubhead thereby necessarily reduces the maximum amount of momentum that the club can transfer to the ball.

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A cemented carbide tool for cutting, punching or nibbling which, by means of a special way of manufacturing, has surprisingly better properties in comparison to those of conventional tools.The manufacture of sheet metal parts is normally done by cutting and punching. By both of these methods the parting of the material occurs between two edges working against each other. The yield point of the material is exceeded at sufficiently a high cutting or punching force.

Nibbling is used for the purpose of cutting contours in normally 3-10 mm thick sheet metal. Cylindrical punches of steel or cemented carbide are most frequently used in a nibbling machine. They perforate the sheet metal by a movement perpendicular to the metal through a die used as a dolly. When nibbling and punching holes, different widths of the slot in the die are used, which are adjusted to suit the composition and sheet thickness of the material. When a so-called "wide slot" is being used, the cutting, when nibbling is taking place, depends on both shear and tensile forces. Using a narrow slot, the cutting of the sheet takes place due to pure shear forces.




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A cemented carbide tool for cutting, punching or nibbling which, by means of a special way of manufacturing, has surprisingly better properties in comparison to those of conventional tools.

The normal wear pattern of a steel nibbling punch is that material by abrasion is worn off and moved up along the punch. Because of the wear pattern, the punch turns conical which in turn finally causes an increased friction force that changes the cutting quality to an unacceptable level. When using cemented carbide punches, this wear process is considerably slower, but with the same result as obtained by the used of steel punches. Due to the brittleness of the cemented carbide the risk of fracture is great. As a result, cemented carbide punches are used only exceptionally.

A cemented carbide preferably for use in rock drilling but also for wear parts and other parts exposed to wear. It is characterized by a core containing eta-phase surrounded by cemented carbide free from eta-phase.


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Carbide surgical tools are made of carbide,like nickel binder tungsten carbide. The cutting surface may be prepared by polishing it until it has the desired surface porosity.A carbide surgical tool usually has a cutting surface with fewer than about 10 pores per square centimeter that are greater than about 12 nanometers in size.

The characteristics of carbide surgical tool helps it maintaining the integrity of the cutting edge for periods that are much longer than prior art tools. The sub-ferrous porosity of nickel carbide advantageously provides a surgical tool that is resistant to corrosion and most importantly resistant to pathogen attachment or entrapment. Additionally, surgical tools fabricated from materials such as nickel carbide produce a tool having superior tactile qualities.




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Carbide surgical tool has a body portion having an ergonomic handle. The ergonomic handle is configured from nickel carbide. Nickel carbide has a density of about 14 to about 17 g/cm3 with particular reference to about 15 g/cm3 and a sub-ferrous porosity. The most significant benefit of is ergonomics of the handle have been optimized to take advantage of weight and balance of nickel carbide.

It is known that cutting edge that dulls during the course of surgery, unfortunately, causes increased tissue trauma and therefore a prolonged period of healing of an incision and potential scaring or infection as a result of the incision being open for a longer period of time.Surgical cutting edges produced from materials having a high porosity are prone to corrosion and therefore dulling of the cutting surface due to this corrosion. Additionally, surgical tools fabricated from materials having a high porosity are also prone to pathogen entrapment and or attachment. Contaminated surgical tools will infect a patient during surgery.


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Carbide surgical tool has a body portion having an ergonomic handle. The ergonomic handle is configured from nickel carbide. Nickel carbide has a density of about 14 to about 17 g/cm3 with particular reference to about 15 g/cm3 and a sub-ferrous porosity. The most significant benefit of ergonomics of the handle have been optimized to take advantage of weight and balance of nickel carbide.

Carbide Surgical tool components are fabricated from nickel carbide having a high density and a low porosity, their manufacture is very straightforward. The carbide surgical tools fabricated from nickel carbide are manufactured using machining methods known in the art.



The benefits of carbide surgical tools are drawn as easily and thoroughly cleaned and sterilized, having no pores or recesses to harbor contaminants.While the foregoing describes use of nickel carbide in surgical tools in the field of surgery, the use of nickel carbide may find appropriate uses such at surgical appliances and medical fastening systems requiring a high density low porosity material that is resistant to pathogen growth. In particular it has been found that surgical drills formed from carbide material dissipate heat in a much more efficient manner than that of other materials. This efficient dissipation of heat reduces heat build-up and thus avoids tissue damage caused by excessive heat. Particular reference is made to bone drill bits.
 

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Cemented carbide tool comprising a binder phase riched layer having a thickness of 0.1 to 5 μm on the surface, and also satisfies the following relationship: 0.02≦ICo/(IWC+ICo)≦0.5 where IWC denotes a (001) plane peak intensity of the tungsten carbide (WC), and ICo denotes a (111) plane peak intensity of cobalt (Co) and/or nickel (Ni) in an X-ray diffraction pattern of the surface.

The resulting cemented carbide tool is excellent in flexural strength and, when the cemented carbide is used for cutting tool, even under conventional cutting conditions where a special device such as coolant under high pressure is not used in case of machining a heat resistant alloy such as Ti alloy, proceeding of wear and occurrence of chipping can be suppressed and tool life can be prolonged. when a cemented carbide is produced by adjusting the content of a binder phase so as to controlling saturation magnetization to 1.62 μTm3/kg or less per 1 weight % of cobalt (Co) and a coercive force to 27.8 to 51.7 kA/m while suppressing segregation of a Co component, fractures in the cemented carbide decrease to impart high deflective strength, and thus a cutting tool suited for drilling or milling can be obtained.


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Golf is a popular leisure fitness activity. For beginners, they not only to practice basic skills but also need to know how to choose the right golf club head.The golf club head is usually made of tungsten alloy counterweight components. Usually these tungsten alloy counterweight components be made as screw, so that is easy to be teared down and replaced.

For different beginners, the chosen golf club head will be different . How to  to select the size of golf club head is mainly based on beginners’own strength.Tungsten alloy counterweight is a kind of high density alloy, on the weight and volume has great advantages than other metal, coupled with the tungsten alloy is a kind of environmental protection material.Therefore tungsten alloy counterweight is widely used in golf club head.

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