Tungsten Nail Sinkers

Nowadays, a popular approach to weighting down soft plastics is the advent of small tungsten nail sinkers to add small amounts of weight internally to soft plastic lures.

Tungsten nail sinkers are thin and nail-like weights insert into soft-plastic baits, like jerk baits, sticks or finesse worms. Tungsten nail sinkers can be used to balance rigged jerk bait for a natural-looking fall. Another option is tail-weighting finesse worms for a tail-first, fall that can trigger hits from shy, following fish.

Tungsten nail sinkers are perfect for adding a small amount of weight to your soft plastic lures. An adjustment in weight can make the difference when conditions on the water change or you want to modify your bait's action. Easily clipped down with standard line clippers, tungsten nail sinkers are an ace-up-your-sleeve. The ability to make quick changes helps you stay one step ahead.

Each active tungsten nail sinker comes with three factors: a sharp tip to penetrate any section of the soft plastic lure, a narrow shank profile to minimize damage to the soft plastic lure and a set of conical barbs along the length of the shank to securely fasten the tungsten nail sinkers into the body of your soft plastic lure.

tungsten-nail-sinkers


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Manufacturers Should Keep an Eye on Tungsten Carbide Cutting Tool Wear

Tungsten carbide cutting tool is a kind of consumable product and can wear out during cutting. Its wear can has three types: mechanical wear, thermal wear and chemical wear.
 
During cutting performance, tungsten carbide cutting tools wear out gradually when they cut down chips from workpieces. It has two main forms of wear: abrasion and breakage. Abrasion is gradually generated when tungsten carbide cutting tools conduct cutting performance continuously. Breakage includes brittle breakage and plastic breakage, such as tipping, cataclasm, desquamating and cracking.
 
The tungsten carbide cutting tools, after wearing out, will have lower cutting precision and higher surface roughness, which may result in the rising of cutting force, increasing of cutting temperature and even sympathetic vibration. And when these happen, its cutting ability will be greatly affected. Tools generally have three periods of wear: primary wear period, normal wear period, and rapid wear period. When the cutter has worn out to a certain extent, it can not be used anymore, which is called the blunt point. The time counted from a totally new tungsten carbide cutting tool being put into use to it reaching its blunt point is called tool service life.
 
The breakage of tungsten carbide cutting tools, like abrasion, is also a representation of tool losing its efficiency. If the cutter suffers too much force, it may break quickly and lose its cutting ability. In the above mentioned case, the so-called breakage happens. Actually, breakage is just a kind of abnormal abrasion.
 
When there is abnormal wear in tungsten carbide cutting tools during machining, immediate measures should be adopted, or it may cause workpiece scrap or even machine tool damage, etc. Therefore, manufacturers should keep a close eye on tungsten carbide cutting tool wear condition.
 
Tungsten Carbide Cutting Tool
 

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Tungsten Carbide Turning Tool Sharpening

Tungsten carbide turning tool sharpening should be conducted by adopting correct posture and methods, and paying attention to related safety knowledge.
 
Correct sharpening posture and methods towards tungsten carbide turning tools:
I.Operators shall stand on the side of grinding machines, in case of getting hurts due to grinding wheel burst.
II.Operators shall separate their two hands to a certain distance when holding the tool, and clamp their waist with tow elbows so that shake generated while grinding will be reduced.
III.When conducting major and minor flank grinding, turning tools should be placed at the horizontal center of grinding wheel with tool nose sticking up about 3°~8°. After touching the grinding wheel, the tungsten carbide turning tool should move right and left in a horizontal direction. When the turning tool leaves the grinding wheel, it should rise for a little in case that the cutter edge ground is damaged by the grinding wheel.
IV.When conducting flank face grinding, the back of the toolbar should tilt to the left with a tool cutting edge angle.
V. When conducting minor flank grinding, the back of the toolbar should tilt to the right with an end cutting edge angle.
 
Safety knowledge during tungsten carbide turning tool grinding:
I.Before grinding, operators shall check if there is any crack on the grinding wheel and whether the grinding wheel spindle nut has been tightened. And the grinding wheel should be tried first before being put into use in case that it bursts and hurts operators.
II.Operators shall wear protective glasses during grinding in case that gravel and scrap iron would run into their eyes.
III.Operators shall not stand right in front of the rotating direction of the grinding wheel in case of accidents.
IV.When conducting small tool bit grinding, the tool bit shall be placed into the toolbar so that operators can hold it tightly.
 
Tungsten Carbide Turning Tool
 

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Counterfeit Gold-Plated Tungsten-3

He believes these were the only instances where he wrote about possible counterfeit gold-plated tungsten bars before his March 2 column for CoinUpdate.com.  Since last October, there has been ample time for either the Chinese central bank or the US bonded warehouses who supplied them with gold bars to have publicly addressed the rumors of counterfeit gold bars.  None have done so.  This silence could be interpreted two different ways.  If the report of counterfeits is possibly true, the parties involved are just hoping that the story dies down.  Or if the story is false, the parties involved may not have deemed it important enough to give it more widespread coverage by issuing a refutation.

If even a portion of the stories of counterfeit gold-plated bars turn out to be true, governments, central banks, brokerage firms, and owners of the bonded warehouses would have a strong incentive to hush up the information.  In the past decade, a downpour of released unclassified US documents confirm that the US government has lied to the public for a long time about issues related to gold—going all the way back to 1918!  So, he has significant suspicions that the US government today is not being honest about gold trading and inventories.

Bradshaw’s column was pretty much accurate when it cited specifics from his column last week.  But it seems Bradshaw used the column to discuss the issue that really bothered him—the rumors about counterfeit gold bars at Fort Knox—about which he has never before written.  The way Bradshaw wrote his column, more than one reader thought that he might have irresponsibly passed along rumors on this subject as being established fact.  While others, not named in Bradshaw’s column, may have done so, he only accept the credit (and occasional blame) for what I have written.  When you try to be on the cutting edge of breaking information, sometimes you blow it. He thinks I did it properly this time.

By the way, while he is discussing government deception of the public, he does admit that politicians and bureaucrats are frequently truthful.  Despite my suspicious nature, he does believe the testimony before Congress a few months ago by the general counsel for the Federal Reserve.  When Scott G. Alvarez made an unqualified statement that all of the gold supposedly stored in Fort Knox was actually there, even though it has not been audited since the 1950s, he bet that’s true.  However, Alvarez was not asked and did not volunteer any information as to who holds title to the gold stored at Fort Knox.  he has significant suspicions that some of it is owned by other parties as a result of gold swaps, particularly the German central bank.

tungsten-gold-plated-bar


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Tungsten Carbide Milling Cutter Milling Types

Tungsten carbide milling cutter has tow types of milling according to the relative position between the milling cutter and the workpiece.
 
When the axis of tungsten carbide milling cutters does not overlap with the symmetrical Centerline of the workpiece milling width, then the milling in this case is called the asymmetric milling, which can be subdivided into asymmetric up milling and asymmetric climb milling. During asymmetric up milling, the cutter teeth cut in with a relatively small cutting thickness while cut out with a larger cutting thickness. This kind of milling way, with stable cutting performance, less impact suffering, can improve the tool durability and surface quality and is suitable for the machining of carbon steel and low carbon alloy steel. The cutter teeth cut out with a relatively small cutting thickness in asymmetric climb milling and thus it is more suitable for cutting materials with low intensity and large plasticity.
 
When the gyration center of tungsten carbide milling tools is in a symmetrical position with the workpiece, then the milling in this case is called symmetric milling. This kind of milling way has relatively larger average cutting thickness, and can avoid the extrusion towards workpiece surface when the cutter cuts in. The milling tool has high durability adopting this milling way. It can ensure that the cutter teeth conduct milling under the chilling layer of machining surface during the finish-milling for the machine tool guideway, which can help achieve relatively high surface quality. This kind of milling way should be given priority in the milling of quenched steel and machine tool guideway. In addition, symmetric milling can generate great vibration, so it requires machine tools with good rigidity.
 
Tungsten Carbide Milling Cutter
 

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Tungsten Carbide Formed Turning Tool Introduction

Tungsten carbide formed turning tool is a specialized tool for solid of revolution formed surface machining, and its cutting edge shape is designed according to the work piece outline. With formed turning tool, a formed surface can be processed through only one cutting stroke. It is easily operated and has high efficiency. The precision of the formed surface has nothing to do with workers’ skill, but depends on the precision of the cutting edge of turning tools. It can ensure the consistency and interchangeability of the work piece surface shape and size precision. Its processing precision can reach IT9—IT10 while the surface roughness about Ra6.3—Ra3.2. Formed turning tools can be reground for many times, thus has relatively long tool life. However, the design and manufacture of this kind tool is quite complicated and costly, and therefore, it is mainly used in the volume production of small tools and accessories.
 
Tungsten carbide formed turning tools can be classified into several types as follows:
I. Flat formed turning tool
This kind of turning tool is strip-shaped, which is similar to general turning tools. It is easily to be manufactured and low in cost but allows for only a few times of regrinding. It mainly applies to the machining for simple outer formed surface, such as thread turning tool.
II. Prismatic formed turning tool
The tool bit and cutter bar of this kind of turning tool are manufactured separately, which greatly increases its regrinding times along the rack face. It has rigid cutter body, but its manufacturing technology is more complicated than that of the circular formed turning tools, and it can be used only in the machining of outer formed surface.
III. Circular formed turning tool
This kind of turning tool looks like a cylinder wrapped by a prismatic formed turning tool. It allows for the most regrinding times and its manufacture is relatively easy to be conducted than prismatic formed turning tools. In addition, it can machine both the inner and outer formed surface of work pieces.
 
Tungsten Carbide Formed Turning Tool
 

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Tungsten Carbide Cutting Tool Coating Introduction

Tungsten carbide cutting tool, after the coating treatment, can achieve solid lubrication, reduce friction and cementation, reduce heat absorbing and thus withstand relatively high cutting temperature.
 
The properties of tungsten carbide cutting tool coatings depend on their micro-structure and chemical constituents, the materials natures and also the manufacturing process. Different manufacturing processes will produce coatings with different mechanical properties and structures. There are some main problems that needed to be taken into consideration during tungsten carbide cutting tool coating processing:
I. Choosing of coating processing methods;
II. Matching of coatings and base materials;
III. Choosing of coating thickness;
IV. Interaction and diffusion between coatings and base materials;
V. Coating conditions, technological parameter, base pretreatment before coating processing, etc.
 
The relatively common tungsten carbide cutting tool coating processing methods include chemical vapor deposition (CVD), physical vapor deposition (PVD), plasma spraying, sol-gel method, etc.
 
Tungsten Carbide Cutting Tool
 

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Tungsten Carbide Clip-type Thread Milling Cutter Introduction

Tungsten carbide clip-type thread milling cutter, with separated cutter bar and blade, is a type of tread cutter. Its cutter bar is generally made from tool steel or high-carbon steel, while its blade is made from tungsten carbide. They are usually locked together with screws.
 
Tungsten carbide clip-type thread milling cutter is the most common seen tool among thread milling cutters with relatively low price. Its structure is similar to that of the general clip-type milling cutter and it consists of reusable cutter bar and renewable blade. Taper threads can be processed by using specialized cutter bar and blade. This kind of specially designed cutter has many thread cutting teeth on its blade and thus can produce many thread teeth at one time by machining around the spiral line.
 
When selecting tungsten carbide clip-type thread milling cutters, one should take into consideration the diameter of thread being processed, depth, and work-piece material and so on, and choose cutter bars with relatively large diameter as far as possible. The thread machining depth of tungsten carbide clip-type thread milling cutters depends on the effective cutting depth of the cutter bar. Because the blade is shorter than the effective cutting depth of the cutter bar, the machining has to be conducted on different depth when the depth of thread being processed is longer than the blade.
 
 
Tungsten Carbide Clip-type Thread Milling Cutter
 

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Counterfeit Gold-Plated Tungsten Bar-2

There have been infrequent reports over the decades of genuine gold bars that were drilled and filled with tungsten. He never discussed them because they were isolated small-scale activities.  However, the story of large quantities of possible counterfeit large gold bars is a story that, if true, the public would really need to know.

The information about the possible counterfeit gold-plated tungsten bars came to me from sources with a good track record of reliability.  Still, when he discussed them last fall, I was careful to indicate that they were rumors.

In his October 19, 2009 column at Numismaster.com, titled “What A Run On Gold Looks Like,” in the middle of the essay, he started one paragraph with, “There is a story now circulating that I have to classify as a rumor.”  It goes on to discuss the possibility that some of the gold bars provided on the London exchange by the Bank of England may have been filled with tungsten.  He further explained in that column that some of the gold bars held by the US and British governments were probably of lower purity, about 90%, than would be acceptable for delivery on the London market.

In the November 4, 2009 issue of Liberty’s Outlook he mentioned to readers, under the headline titled “Rumor—Counterfeit Gold Bars Discovered In Central Bank Vault,” about the China central bank story.  He also listed a website address of a Chinese company offering gold-plated tungsten products that showed a photograph of a small gold bar on the home page of its internet site.  He mentioned that if the China central bank story turned out to be true, it would have significant ramifications.

In the December 2, 2009 issue of Liberty’s Outlook, under the headline “Reasons Why Gold And Silver Are Likely To Rise Much Further,” he passed on subsequently received information that there were supposedly four counterfeit bars detected by China’s central bank and that the counterfeits came from bonded warehouses in the US.  The discussion uses several qualifiers such as “allegedly” and “could.”  At the end of that section he disclosed that reporters trying to cover this issue were sitting on additional damning information because they were unable to obtain sufficient corroborating evidence.

tugnsten-gold-plated-tungsten-bar


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Tungsten Carbide Reamer Problems and Countermeasures (II)

V. High internal hole surface roughness 
When there is high surface roughness in internal holes, measures can be taken as follows: reducing the cutting speed of tungsten carbide reamers; selecting cutting fluid based on materials being processed; reducing tool cutting edge angle; reducing reaming allowance; reducing reamer teeth number according to specific situation and enlarging the chip pocket or adopting reamers with tool cutting edge inclination to facilitate chip removal process; protecting reamers from being damaged during the grinding, using and transport; using fine oil-stone to repair reamers that are damaged or replacing them directly.
VI. Poor precision of hole position after reaming
When this happens, measures can be taken as follows: replacing guide sleeve regularly; lengthening the guide sleeve; repairing machine tool in time and adjusting the gap between principal axis and bearing.
VII. Reamer teeth tipping
When there is reamer teeth tipping problems, measures can be taken as follows: changing the prefabricated aperture size; changing allowance allocation and choosing cutting parameters reasonably; reducing reamer teeth number and enlarging chip pocket or grinding off one tooth.
IX. Out-of-straight hole center line after reaming
When the center line of hole after reaming is not straight enough, measures can be taken as follows: reducing tool cutting edge angle; replacing the tungsten carbide reamers with reaming pilot and lengthened cutting part; operating correctly.
 
Tungsten Carbide Reamer


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