Mounted Points
General Information
Cutting speeds
150.000
of mounted points
The diagram on the right allows you to
100.000
determine the rotational speed [RPM] from a
90.000
80.000
given peripheral speed. Recommended cutting
70.000
speeds are stated in the introductory descrip-
60.000
tions for the various hardness grades on the
following pages.
50.000
45.000
In the diagram, rotational speeds are repre-
40.000
sented by blue diagonal lines. Each vertical
35.000
line represents a tool diameter. From its point
30.000
of intersection with the diagonal line for a
25.000
given peripheral speed, proceed horizontally
20.000
to the left margin where you will find the
corresponding rotational speed [RPM] of the
grinding tool and spindle.
15.000
Example:
10.000
Mounted point: dia. 20 mm
9.000
Hardness grade: O
8.000
Cutting speed: 25 - 40 m/s
7.000
Rotational speed: 24.000 - 38.000 RPM
6.000
5.000
4.000
3.500
2
3
4
5
6
7
8
10
12
14
16
20
25
32
40
50
Tool diameter D [mm]
Products made to order
Safety recommendations
Should you not find a suitable solution for
The buckling speed [RPM] calculated in ac-
your task in our extensive programme line, we
cordance with EN 12413 is determined by the
= Wear eye protection!
can produce tailor-made mounted points for
following factors:
your application. We will take into considera-
■Shape and dimensions of the mounted
tion your specifications and whishes, drawings,
point
information on bonds, hardnesses, grit sizes,
= Wear hearing protection!
■Diameter of the steel shank Sd
grit types, shapes, dimensions, shanks and
■Unsupported shank length L0
packaging. Please call your local sales consult-
ant. We will be happy to advise you.
Collet
= Read the instructions!
Sd
Customer support
D
All mounted points supplied by PFERD are
Our experienced sales consultants and custom-
L0
L3
approved for a maximum peripheral speed of
er support engineers will be glad to assist with
T
L2
50 m/s.
any specific grinding problem you may have.
Maximum RPM levels for the various shank
lengths and shank diameters are defined in
D = Mounted point dia.
Spindle extensions
DIN 69170 based on EN 12413. These limits
T
= Width of mounted point
Using spindle extensions it is possible to
must be strictly observed to prevent hazards
Sd = Shank dia.
increase the shank length of mounted points,
due to shank buckling.
L0
= Unsupported shank length
making it easier to work in hard-to-reach areas
L2
= Shank length
e.g. inside pipes and ducts. The extension is
Regardless of the shank length, the clamping
L3
= Clamping length of shank
simply fitted into the collet of the machine (air
depth (L3) in the machine collet must be at
or electric grinder) or inserted into a flexible
least 10 mm.
shaft handpiece. With these spindle extensions
you can replace expensive tools with long
Each package of PFERD mounted points
shanks.
comes with RPM recommendations for a given
Important!
unsupported shank length (L0) of that product.
Observe applicable safety codes and ac-
Please ensure the concentric accuracy and cor-
cident prevention regulations when work-
rect clamping function of the drive.
ing with spindle extensions.
A table with the maximum permitted RPM
For more information and ordering data on
for the whole PFERD mounted point product
spindle extensions, please refer to catalogue
range is available on request.
209, accessories for tool drives, extensions for
drive spindles.
203 I
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