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The engraving industry is a modestly-sized market
in America. There are engravers who prefer working on classic firearms and even
etch artworks into objects such as swords and knives. The federal government
prints currency using engraved metal plates. Others are more challenging, such
as engraving glass items. Nowadays, some glass objects are often etched by
laser imagery but there are people who take the classic route and use diamond
burrs. Since there’s a danger of chipping for the item being engraved, there
are some pointers to consider:
Start by researching on diamond burrs with finer grades. The
higher the grade number, the finer the grit. Some experts say a bit with 120
grit will work well in general engraving and higher grits help produce darker
areas in the engraving. Consider reducing the rotary tool’s speed to allow for
more defined edges.
Take note of the handpiece’s maintenance condition
when engraving. Check the collet and bearings for signs of wear as they can
contribute to chipping as a result of wobbles. Make sure that the bur itself is
not locked too tight or the handpiece will be stripped. Apply water, or a
sponge soaked in water and soap on the surface area to help lubricate the bit.
Precaution is everything when you’re engraving.
Feeling the Whirr When the Dental Drill Hits
Posted by
Unknown
Ever sat down on the chair at your dental practice
and saw a small handheld device that had a number of attachments in a nearby
box? The device is a dental rotary drill and the attachments are simply known
as dental burs, rotary file bits that are made for various purposes in a
specific field. When you feeling something that hits your teeth when the
dentist uses the drill, that’s the burr doing the work.
Each burr, which may be no longer than the front
third of any of your fingers, has three parts – the head, the neck, and shank.
The head contains the main parts that come into contact with the subject
surface. The neck is the support arm while the shank is the main “driveshaft”
linking the entire burr to the drill. The item is fundamentally the same as
those used in household rotary drill tool sets. When a dentist needs to replace
one bur with another, a small clamp or the bur changer is used to lock it
in.
Burrs come in multiple shapes and sizes, all based
on various preferences set by the dentist himself. They include pointed heads,
which come in coarse or extra coarse. However, the vast number of drill bits is
so mind-boggling, that the International Organization for Standardization has
stepped in to properly catalog them by number and design.
Diamond Burs are a Dentist's Best Friend
Posted by
Unknown
Although
burs can be seen in workshops, they're more common close to the dentist's
chair. The burs are abrasive enough to gently file the teeth to prepare for
certain dental procedures such as fitting the crown or preparing the cavity for
filling. Traditionally, the dentist's arsenal includes carbide dental burs;
however, there's a growing market for the harder and more cutting-edge
diamond-tipped burs. As burs keep the process of getting rid of harmful
deposits from the teeth short, the job is even shorter with diamonds.
With
proper care, teeth are actually harder to cut through than you think. The full
set of chompers have evolved to resist chewing after chewing, making them among
the hardest bones in the human body. The job of cutting through teeth gets even
more difficult with amalgams and composite resins present in patients that had
their teeth filled in the past. Diamond-tipped burs, for all their hardness,
can cut through enamel and dentin, as well as artificial fillings, with ease.
While
more expensive than traditional burs, diamond burs last longer, especially with
proper care and use. This makes replacements less frequent, making diamond burs
a more economical choice for a number of dentists. Plating burs with diamonds
also enables burs to be smaller, allowing for precision cutting and filing.
Behind the Luster, the Hard Side of Diamonds
Posted by
Unknown
When
you want to drill holes into the glass without making the entire sheet crack,
there are two kinds of drill bits that can do the job: a tungsten carbide and
the harder diamond-tipped bit. As diamond is among the hardest minerals on
Earth, many workshops choose to work with diamond-tipped bits, especially in
precision glass cutting and drilling. With a Knoop hardness rating of 7,000,
it's 3.5 times harder than tungsten carbide and can cut through glass, which
falls between 400 and 550 in the hardness scale, with relative ease.
One
material cutting into another material is a testament to the former's hardness.
This is because the first material can resist changes in shape better than the
second, which cuts or breaks under the first, when force is applied. However,
experts say the cutting ability of diamond depends on how you use it. Using the
edge or girdle of a diamond, for instance, may put stress on the diamond. It's
one of a few instances where the glass actually wins over the diamond.
Fortunately,
you don't have to worry about that with drill bits because the diamonds used
here aren't the jewelry quality ones, but rather the ones meant for industrial
use. Cutting glass with the tip on the surface ensures the longevity of the
bit. No wonder diamond-tipped
drill bits are very common in workshops.
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