CBN Grinding Tools, Ceramic Bond
Special Range (Wet Grinding)
Advantages of ceramic
■constant quality level over large product
range;
bond grinding tools
■reduced idle times due to fewer dressing
CBN abrasive particles are extremely hard and
cycles and tool changes.
wear resistant. The cutting edge of the grain
remains sharp (i.e., retains its cutting capacity)
Applications of ceramic bond
for much longer. This offers the following
CBN grinding tools
advantages:
■Low grinding forces, resulting in superior
■Ceramic bond CBN grinding tools are used
dimensional stability and shape holding
for grinding steel in stationary machines,
properties. Spark-out times are shorter due
mainly in volume production environments.
to minimized spindle deflection.
■Ceramic bond CBN grinding tools are always
■Prevention of overheating in the surface
used wet. The coolant should contain EP
and near-surface zones of the workpiece.
additives. Tool life can be increased substan-
This characteristic is further emphasized by
tially by using a grinding oil.
the exceptional thermal conductivity of the
■Cutting speeds should be in excess of
CBN grit.
30 m/s. Higher cutting speeds increase the
cost-effectiveness of the grinding process.
Ceramic bond CBN tools offer an outstanding
■The exceptional performance of ceramic
tool life and profile holding capability, even at
bond CBN grinding tools can be further
high stock removal rates. The resulting benefits
increased through the use of low-vibration
include:
machines.
Composition and explanation of
Shape 1A8
Shape 1A1
the order number
Tool shapes
PFERD supplies standard grinding tool shapes
H
D
H
D
as well as any special styles our cusomers may
require. Based on the ISO 6104 standard for
diamond and CBN grinding wheels a distinc-
tion is made between the following shapes:
X
T
T
e.g. 1A8 12 - 6 - 6 (D - T - H)
e.g. 1A1 20 - 5 - 3 - 5 (D - T - X - H)
1A8 - Solid body without mount
1A1 - Abrasive coating on mount
Shape 1A1W
Shape 1A8W
Shape 1A8W
cylindrical shank
shouldered shank
X
X
S1
X
Sd
Sd
D
D
Sd
D
L4
L1
L1
T
T
L1
T
e.g. 1A1W 6 - 5 - 3 - 8 - 50 (D-T-X-Sd-L2)
e.g. 1A8W 10 - 5 - 6 - 50 (D - T - Sd - L2)
e.g. 1A8W 10 - 4 - 8 - 50 - 3 - 10
1A1W - Abrasive coating on mount
1A8W - Solid body with cylindrical or
(D - T -Sd - L2 - S1 - L4)
with shank
shouldered shank
1A8W - Solid body with cylindrical or
shouldered shank
Style 1A8W (cylindrical or shouldered shank)
Tool dimensions
Abrasive coating specifications
and 1A1W tools are available with steel or
The tool dimensions submitted should describe
A complete specification of the abrasive
carbide shanks.
the tool as fully as possible, i.e., the dimen-
should include the following data:
The modulus of elasticity of carbides is about
sions of both the abrasive body and the shank
■Grit size,
three times as high as that of steel.
(including its shoulder, where applicable)
■grit concentration and
The modulus of elasticity describes the de-
should be indicated as accurately as possi-
■bond type.
gree of deformation a body will undergo in
ble. Tools can also be produced to customer
The composition of the abrasive can be
response to loads. In internal grinding, a high
specifications. For tools made to order we
freely selected to obtain an optimum abrasive
modulus of elasticity of the tool shank means
need a technical drawing showing all relevant
product for your application. In addition, the
that the deformation of the tool by grinding
manufacturing dimensions.
ceramic bond can be adapted exactly to com-
forces will be minimized. This will result in the
ply to the individual machining task.
following specific benefits:
Just select any desired bond hardness, pore
■prevention of geometry errors;
volume and pore structure.
■substantial reduction in (non-productive)
Please contact our applications engineer-
spark-out times.
ing team for further details regarding
optimum bond selection and tool design.
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