Several accidents took place in Ashland area
WAHOO – The Saunders County Sheriff’s Department recently reported an accident in which a vehicle collided with a pedestrian. Craig Barr Deer Mountain Forge Hand Forged Damascus Knife Blade Blank cutting test.mov
Need bread crumbs? Or perhaps you like making your own lamb, chicken or pork burgers, or sausages? Then again maybe you make baby food at home to avoid artificial ingredients? For all of these tasks you can enlist the help of your powerful KitchenAid stand mixer thanks to this fabulous attachment….
Nothing is worse than going to cut with your cutlery, and having the handle slip around in your hand. To combat this potential for injury, Victorinox has created this Fibrox boning knife. The Fibrox® handle is textured and provides a firm grip, even when wet, and does not slip or slide around. It is comfortable and fits naturally to the shape of your hand, and provides an attractive and modern st…
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Buck Knives Folding Hunter Knife without Finger Grooves. Buck Knives Folding Hunter is the most copied knife in the world… the original lockback Folding Knife. Ideal for hunting, fishing, camping and more: 420HC steel blade; 4 7/8″ long closed; 3 3/4″ long blade; Clip blade; Natural wood handle with brass bolsters, liners and rivets; Black leather sheath; Weighs 7 1/5 ozs. Order Now! WARNING: Yo…
Variety is usually the first thing that shoppers notice when browsing through diamond abrasive products.
Not only are abrasive power tool accessories available in countless shapes (like wheels, cups, and core bits), but the list of qualities and specifications that change their performance is also long.
On top of that, manufacturers don’t always advertise their diamond products with detailed specifications. Often, diamond products only indicate the type of work they are meant for, not the design details that suit them for the work.
In either case, knowing specification details and how they relate to tool performance is the best foundation that shoppers can have when matching diamond abrasives to their work.
Technical know-how helps tool users make the best purchasing decisions, regardless of how products are labeled and advertised by manufacturers.
Diamond abrasives are made by adhering diamond particles to a base material with a bonding agent. Sometimes the bonding agent also serves as the “base” of the product, and other times they are separate. Qualities related to this basic construction can drastically alter the product’s performance, and are discussed below.
Because diamond abrasives are expensive, most purchasing guidelines for them aim to maximize cost efficiency. This is done by correctly matching a diamond product’s durability to the kind of target material and work it will be doing.
Bond Types
Understanding the importance of bond type and bond hardness (discussed below) in diamond abrasives requires knowing how they wear and stay sharp.
Simply, (with the exception of “dressing”) they stay sharp by wearing.
Friction, pressure, and heat during use causes dull, top-layer diamonds to pop out of the bond matrix, exposing fresh, sharp diamonds beneath.
The rate at which diamond abrasives wear/self-sharpen depends on a balance between material hardness and the strength of the bond holding the diamonds in place. The idea is to use blades that wear at a rate that replaces diamonds just as they begin to dull, maximizing the quality and speed of cutting being done, and durability.
There are three major types of bonding types used to manufacture diamond abrasives: metal matrix (sintered), resin, and electroplated.
Sintered/Metal Bonded
Metal bonded diamond abrasives are the most commonly used, because, generally speaking, they are the most durable and very general purpose.
Diamond grains are bonded to a metal matrix in a sintering process (heat and pressure) that layers diamond grains throughout the material. Sometimes this diamond/metal matrix is bonded to a separate base (usually steel), and sometimes the matrix also serves as the base.
Because of their durability, metal bonded diamond abrasives are the most cost effective unless the specialization of resin or nickel bond types is needed. Although this bond type is generally “universal,” metal bonded abrasives still vary between one another in terms of hardness and other factors, and need to be carefully matched to their applications.
Most common metal bond grades (bond hardness): L, N (most common of the two) dressable the most durable and universal
Resin
Construction of diamond abrasives using resin as a bonding material is very similar to the construction of non-diamond grinding wheels that use a resin agent.
Resin is a much softer bonding agent than metal matrix, and allows diamond particles to escape the product more readily. This means that resin bonded diamond abrasives do better at staying sharp than metal bond types, cut and remove material faster, are cooler cutting, are “dressable,” and great for precision grinding and cutting.
The disadvantage is that resin abrasives will wear much faster. One, this restricts their use to materials in the soft to medium range.
Two, their lower durability means that it’s even more important to select the right resin bond hardness for the target material. Otherwise, users will be going through products too quickly for the benefits of resin bonded diamond products to be cost effective.
Most common resin bond grades (hardness): H, N, R
dressable
fast, cool cutting for precision work and finishing
Electroplated (Nickel Bond)
Electroplated diamond products use a thin sheet of nickel to bond a single layer of diamonds to the product (usually blades).
This bond type is soft and wears very rapidly, is not dressable, should be restricted to softer materials, and is usually only cost effective for minimal use.
The advantages to this bond type are that nickel bonded diamond products are very abrasive and fast cutting. They can also be stripped and re-plated at minimal cost to the owner.
Most common nickel bond grades: N, P, R
not dressable, but can be stripped and replated
maximum particle exposure, and high stock removal
Bond Hardness
Correctly estimating the needed durability of a diamond abrasive is the most important purchasing consideration, because of their expense.
Bond hardness (along with bond type) is the most determining factor for durability, and must be matched correctly to material hardness. The general guidelines are these:
1. Softer bonds for harder application materials. Harder materials will wear (dull) diamond particles faster. This means that, in order for the product to stay sharp, a softer bonding agent is needed to allow diamond grains to escape the matrix more rapidly.
Too hard a bond will cause very slow cutting, and risk heat damage to the abrasive.
2. Harder bonds for softer application materials. Softer materials will not wear diamond particles as quickly. This means that particles are usable in the abrasive longer, and do not need to be ejected from the bonding matrix as rapidly in order to ensure efficient cutting. Too soft a bonding material will cause unnecessary wear, because still-sharp diamond grains will leave the product prematurely.
Bond hardness is expressed on an alphabetical scale, progressing from soft to hard from A to Z.
Again, it is important to mention that shoppers will still have to choose a specific bond hardness, even between diamond abrasives of the same bonding type.
Diamond Grit Size (Mesh Size)
A specialized mesh is used during the manufacturing process of diamond abrasives, serving two purposes:
1. The mesh sorts diamond grit sizes within a specific range, and
2. It positions the diamond grains for bonding.
Because of this, “mesh size” and “grit size” are interchangeable terms when talking about diamond abrasives.
A high grit number corresponds to smaller diamond grains, meaning a finer abrasive. A lower grit number means larger, more corsely-cutting grains.
Particularly with diamond abrasives, grit size affects the “micro damage” to the surface finish. Although the cutting power of a lower grit number might be attractive, the roughness of its cut may not be the best thing if a very fine finish is desired in the end. Diamond abrasives aren’t always labeled with their exact grit number, sometimes advertised as simply being of coarse, medium, or fine grit.
Below are the grit number ranges that generally make up these categories:
Coarse: 20-80; (masonry, concrete, and stone)
Medium: 80-200; (glass, ceramics, and quarts)
Fine: 200-400; (slow grinding, and fine polishing)
Diamond Concentration
The concentration of diamond grains in their bond matrix can be altered in diamond abrasives to achieve different effects in performance.
Concentration is expressed much like grit size, using a system of “round” numbers that represent specific volumetric distributions of diamond grains. For example, concentration number 100 is typical for diamond abrasive products, and it corresponds to an exact measurement of 4.4 carats (of diamonds) per cubic centimeter, or, 25% concentration of diamonds by volume in the bonding matrix.
General guidelines about diamond concentration:
Higher concentration will make blades more durable and produce a finer finish, but it will also cause slower cutting speeds because of increased friction. Abrasives with a lower diamond concentration are generally better for hard materials, and they cut much faster.
Diamond Grades and Types
Just like diamonds that are used in jewelry, abrasive diamonds come in many types and grades.
The nomenclature and categorizing systems for these features are excessively technical, extensive, and often confusing.
Changes in diamond type and grade do affect diamond abrasives, but only in a secondary way when compared to the other, more critical, features and design differences discussed in this article.
Because of the depths of these topics and their relative unimportance, we won’t delve any further into the subject. However, we make this brief mention to acknowledge that shoppers will eventually encounter these terms, and invite them to investigate diamond grades and types if their applications demand it.
Remember, shopping with durability and cost-effectiveness in mind is the way to go with diamond abrasives. The hardness of the bond and other product features must be balanced with material hardness and the type of work being done.
To help make the search easier, shoppers visiting eReplacementParts.com can narrow diamond abrasive searches by selecting what kind of target material they have in mind. This way, the only products that display on the page are those that combine features for the selected application material.
About the Author
Written By: Justin Larsen Professional writer for eReplacementParts.com Follow Us on Twitter | Become our Fan on Facebook
How to Make a Custom Knife Blade : Custom Knives: Profiling the Blade
Cuisinart Smart Stick Hand Blender – 200W Blend ingredients right inside pots, pitchers, bowls, or the clear plastic beaker that is included with the Cuisinart Smart Stick Hand Blender, which is available in your choice of color. A powerful 200-watt motor operates with an easy one-touch control. Blend drinks, puree soup, and mix crêpe batters in seconds! The blender features a ergonomic grip that…
Slice and julienne vegetables evenly into thick or thin slices with ease using this folding mandoline slicer from Progressive. This versatile and efficient gadget uses three double sided cutting blades to provide six cutting option; thin slice, super thin julienne, medium slice, thin julienne, thick slice, and thick julienne. The blades are made of stainless steel for edge retention and efficiency…
The product of collaboration between Gerber and survival expert Bear Grylls, the Folding Sheath Knife is a compact knife that folds for easy storage and portability. A dual-sided thumb stud makes for easy one-handed opening. Its half-serrated, high-carbon stainless steel blade is ideal for edge retention and cutting rope, and it comes with a nylon sheath. A rubber grip and the lockback feature pro…
HELP?? can you bring a knife to a dallas mavs basket ball game?
like for self defense and its a mavs basketball game if that means anything…umm its the new sog knives- flash ii black tanto blade so it looks evil but it gets the job done;) look it up!
anyways i don’t want to have this taken up because its a pretty expensive knife…
no you will not be able to take a knife like that into an NBA basketball game.
If it’s an expensive knife, then just leave it behind and why would you need to
defend yourself at a basetball game anyways?
eVak’s Amazing Ricochet Throwing Knife Montage Episode 1 COD MW2 Best Game Winning Killcams
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Jewel’s debut album, Pieces of You, reveals a special voice–strong and focused on both the whispery verses and the hooky choruses. The recording also exposes an unfortunate tendency to present trite, hackneyed sentiments as if they were oracular visions from a young prophet to a jaded world. For the most part, Jewel sings to her own acoustic guitar accompaniment, but she has a lot more in common …
Adding pop savvy to their soul-disco mix, Jamiroquai grabbed the attention of MTV and Top 40 radio and won a Grammy with this platinum-selling album, their third. It’s a fine record, with warm keyboards, sweet strings, and irrepressible grooves grounding Jay Kay’s sublime vocals and fueling the hits (“Virtual Insanity,” “Cosmic Girl,” the title track). That voice–elastic, jazzy–is the fire of th…
when is the army getting issued multi cam for good?
i was on post the other day and saw several soldiers from a different unit wearing multi cam. i know that they are issuing them to deploying units but when are they going to be issued for units for regualr wear? i have worn them once and found them much more comfortable than ACU’s. thanks!
ACU are not universal camo. they make you universaly stick out.
Soldiers shouldn’t get too comfortable with the MultiCam pattern.
“It is not the new standard,” Fuller said.
In fact, there already are measures in place to ensure the uniform isn’t seen on stateside posts.
It sucks. I like multicam, too. ACU is just fuhkin ridiculous.
40520 Features: -Chef’s knife. -Fibrox collection. -Fibrox non slip handle. -High carbon fine grain stainless steel blade. -Taper ground blade for perfect chopping. Specifications: -Made in Switzerland. -Victorinox provides Lifetime warranty against defects in materials and workmanship. -Blade: 8” . -Overall dimensions: 2.25” H x 15.25” W x 0.75” D….
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New camping utensil set. This sturdy tool is made of high quality stainless steel. It includes a sharp knife, fork, spoon, corkscrew and bottle opener. A great tool for weekend camping! The tool even separates, so you can use the knife and fork in different hands. It comes with its own storage bag. Folded length: 4 1/2″ Weight with bag: 5.3 oz…
What is a person charged with eventually be a single, especially one years 16-18 years? Image of the knife: ~ http://www.csulb.edu/ kmacd/346Notes3_files/swiss-army-knife.jpg Fifi, if you think that Muslims are given preferential treatment by the law, you are a idiot and a bigot and you have to pick up a newspaper.
If you are under 18 years, then it is illegal, I'm sure 18 years
IWA Norimberga – Extrema Ratio tactical military knives – coltelli tattici militari
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Nothing is worse than going to cut with your bread, and having the handle slip around in your hand. To combat this potential for injury, Victorinox has created this Fibrox bread knife. The Fibrox® handle is textured and provides a firm grip, even when wet, and does not slip or slide around. It is comfortable and fits naturally to the shape of your hand, and provides an attractive and modern styli…
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Rock bastardizations of classical music are as old as Kim Fowley’s–and ELP’s–Tchaikovsky tweaking “Nutrocker.” But classical interpretations of rock music have generally been something of a high-wire act. While most pop fare has strong melodic foundations for the soloist to build from, Christopher O’Riley has challenged himself here with the catalog of Radiohead, one of modern rock’s most acclai…
