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GRINDING
WHEELS
Introduction
SIMAT Abrasivi S.p.A. have been in the grinding wheel's business
for fifty years, supplying the mechanic industry from the facility
located in Grugliasco, near Torino, Italy. Therefor the company reached
large experience and strong reputation for technologies, and grinding
knowlodgment.
From 1987 it also started producing diamond dressing rolls, in many
different production technologies, and more with special tools made
with CBN (Cubic Boron Nitride) and with diamonds, produced with the
same accuracy and quality constancy that distinguished the all production
line. In the grinding wheel's field SIMAT is the main supplier
of FIAT Auto with a strong presence in all the main grinding operations,
from speed gear to engine's components.
The strong experience, besides the "know how" learned on the construction
and utilization of its products, is the possibility of having flexibility
during the production cycle, the know how of solving any type of g
rinding's problems, the competitiveness in cost's management, the
always disposability and knowlodgment of the Technical Service.
What is mentioned above have the purppose of sensitize all the users
to try and compare the production and quality efficiency of SIMAT's
products. Contact us!
Introduction to grinding wheels
- The first construction of a g rinding tool
There is no date assignable to the first construction of recognized
grinding wheel, probably between 1840 and 1860, a grinding wheel composed
of emery mixed with clay bond and fused to a certain temperature;
the result was a product similar to our present grinding wheel.
- The first abrasive material
Manufactured of real abrasive material began with the discovery, by
Dr. Edward Acheson, of silicon carbide (SiC) by mixing and fusing
in an electric furnace, carbon, powdered coke and clay.
Few years later Mr. Charles Jacobs introduced an artificial corundum
(Al2O3) by fusing bauxite: this artificial type of grain will became
over the years the main element, along with silicon carbide, for the
production of both ceramic and resinoid bonded grinding wheels.
- Definition of grinding wheels
A grinding wheel is an abrasive tool used to grind, to cut, to polish
and to remove material from solid substances such as metal, wood,
rubber, etc...
-The two main type of bonded abrasive grinding wheels: organic
and inorganic
There are two different type of bonded grinding wheels, organic
and inorganic and there is a main difference in between: the first
one is an abrasive tool where the abrasive grain is held together
by an organic material such as resin, rubber, shellac, these grinding
wheel are also called resinoid. An inorganic grinding wheel is bonded
by material such as clay, glass, frits, porcelain, identified as
ceramic bonded grinding wheel.
- Essential elements for producing a grinding wheel
With the above introduction we have described the two main components
of an abrasive grinding wheel, the abrasive grain and the bond agent,
but there are other basics elements during a production cycle in
purpose to produce high quality grinding wheels, such as:
- Grit size: it is the dimension of the abrasive grain. It is determinated
by the size of the screen through which the grain will pass. Higher
is the number, finest is the grit (from 8 to 600).
- Hardness: It is deter minated from the bond's toughness, the strength
of the bonding agent that oppones the breakaway of the abrasive
grain during the contact with the workpiece. The hardness is identify
with letter, from D to Z.
- Structure: it is a porosity of the grinding wheel.
It is the space or voids between each single abrasive grain. These
spaces are controlled, so that the grinding wheel can be produced
dense or open depending upon the grinding operation, it is identificable
with numbers from 1 to 12.
How to complete an order
To give us the chance of ser ving You better and within
the shortest time, please include on all Your orders:
- General information
A) If a standard grinding wheel, dimensions in mm.:
- outside diameter (OD)
- thickness (THK)
- inside diameter (ID)
- profile or special shape (if required)
B) If an abrasive segment:
- type of abrasive segment (shape)
- width
- thickness
- length
- radius (if present)
C) If an internal grinding wheel or a nut inserted:
- type of grinding wheel (shape)
- outside diameter (OD)
- thickness (THK)
- inside diameter (ID)
- mandrel diameter and length (if with thread, sign the pitch)
D) Include on all Your orders the speed in meters per seconds.
- Grade information
For all the product line we also need a grade, (if You have any):
- type of abrasive: aluminum oxide, silicon carbide, cubitron™
- grit size: from 8 to 600
- hardness: from D to Z
- structure: from 1 to 12
- type of bond: vitrified, resinoid, rubber or shellac
From the complete and correct definition of all of these characteristics,
depends a good order execution.
Selection of a grinding wheel
A logic conclusion of what mentioned above, should provide
a list of advisees, combined with grinding wheel's grades, and with
the correct quality for determinated grinding operation, but in
purpose we haven't made such a list because there are too many needs
and variables during a grinding process.
A good quality grinding wheel is the final results of an effective
business relation between producer and user, therefor our Technical
Service is always available to test and to supply You with the best
solution.
Grinding wheels on stock
SIMAT Abrasivi, in reference to the contribution given to all
the users, have made selected and large stock availability, for
both ceramic and resinoid "tool rooms" grinding wheels.
The typology include many grades, various dimensions and shapes;
straight wheels with and without profile, dish wheels, flaring and
straight cup wheels, abrasive segments, internal and nut inserted
grinding wheels, cutoff wheels, etc... (all the mentioned grinding
wheels are also available with Cubitron™ grain).
The possibility of having a "ready shipment" material permit to
satisfy urgent requirements for small quantities, and than to avoid
long terms delivery as for non-standard products.
The large variety of products ready on stock gives the choice of
finding the correct quality grinding wheels for the user's needs.
Since fifty years all the SIMAT's products are produced with
accuracy and high quality methods to satisfy all the customer's
requirements.
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