Mounted Points
Table of Contents
Tool drive
Contents
Page
Tool drive
Contents
Page
General information
3
Mounted points
The fast way to the best tool
4-5
Hardness N
Ordering instructions
6
Cylindrical ZY
32-33
Ball KU
33
Tapered KE
33
Series A
34
Mounted points
Hardness M
Cylindrical ZY
7-8
Mounted points
Ball KU
9
Hardness K
Cylindrical
with radius end WR
9
Cylindrical ZY
35
Tree SP
9
Tree SP
36
Tapered KE
10
Tapered KE
36
Cup TO
10
Series A
36
Series A
10
Mounted points
Mounted points
Hardness O
Hardness R
Cylindrical ZY
Cylindrical ZY
37
and Series W
11-13
Ball KU
14
Tree SP
38
Cylindrical
Tapered KE
38
with radius end WR
14
Series A
38
Tree SP
15
Tapered KE
15
Cup TO
16
Mounted points
Series A
16-17
Hardness R for foundries
Series B
18-19
Cylindrical ZY
39
Points for grinding
Tree SP
39
threading dies
20
Tapered KE
40
Mounted points
Hardness O for foundries
Cylindrical ZY
21
Mounted points
Tree SP
21
Hardness F-ALU
Tapered KE
21
Cylindrical ZY
41
Mounted points
Hardness H
Cylindrical ZY
22
Tapered KE
23
Mounted points
Hardness D
Cylindrical ZY
42
Mounted points
Hardness I
Cylindrical ZY
24-25
Ball KU
25
Tapered KE
25
Hand Dressers
Dressing stones
43
Abrasive segments
43
Mounted points
Diamond dresser
43
Hardness T
Cylindrical ZY
26
Tree SP
27
Mounted point sets
44
Mounted points
Hardness J
Cylindrical ZY
28
Ball KU
29
Tree SP
29
Tapered KE
29
For detailed information and
Diamond and CBN Tools
Mounted points
205
ordering data on diamond
Hardness L
grinding points please refer
Cylindrical ZY
30
to catalogue 205.
Cylindrical
with radius end WR
31
Tapered KE
31
Series A
31
2
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203
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
3
Mounted Points
The Fast Way to the Best Tool
PFERD offers a very extensive line of vitrified
To select the correct group mounted point, the
groups are colour-coded and shown on the
and resinoid-bonded mounted points.
material, main fields of application and specific
left-hand side of the chart below.
operating requirements have to be taken into
Designed to meet individual application needs,
consideration. This overview shows which
Application
these products come in a broad range of grain
different types (abrasives, bonds and hard-
The application must then be selected accord-
types, grit sizes, hardness levels and shapes.
ness grades) are recommended for the various
ing to the type of work on the material. We
The mounted points are manufactured on
materials and the tasks at hand.
make the following differentiation:
advanced production lines to high standards of
General use,
dimensional accuracy and stability, consistent
How do I find the best mounted point?
surface grinding and
quality, and close tolerances.
Material
edge grinding applications.
Normally it is necessary to determine the
material to be machined. The various material
Material groups
Bond
Resinoid bond
Hardness grade
Hardness L
Hardness N
Abrasive grit type
ADW
AN
Recommended
35-50 m/s
35-50 m/s
cutting speed
Application
General use
Non-hardened,
Construction steels,
on edge and surface
non-heat-treated
carbon steels,
Surface grinding
steels up to
tool steels,
with high stock removal
1200 N/mm²
non-alloyed steels,
(< 38 HRC)
case-hardened steels
Edge grinding
with high form stability
General use
Hardened,
on edge and surface
Steel,
heat-treated steels
Tool steels,
cast steel
Surface grinding
exceeding
tempering steels,
with high stock removal
1200 N/mm²
alloyed steels
(> 38 HRC)
Edge grinding
with high form stability
Surface grinding
with high stock removal
Non-alloyed cast steels,
Cast steels
low-alloyed cast steels
Edge grinding
with high form stability
Surface grinding
with high stock removal
Rust and
Stainless steel (INOX)
Austenitic and ferritic stainless steels
acid-resistant steels
Edge grinding
with high form stability
Soft non-ferrous
Alu-alloys, brass, copper, zinc
metals
Hard non-ferrous
Bronze, titanium, titanium alloys, hard
General use
Non-ferrous metals
metals
aluminium alloys
on edge and surface
Nickel based alloys, cobalt based
High-temperature
alloys (aircraft engine and turbine
resistant materials
construction)
Surface grinding
Cast iron with flake graphite EN-
with high stock removal
Grey cast iron,
GJL, with nodular graphite cast iron
Cast iron
Edge grinding and grinding
white cast iron
EN-GJS, white annealed cast iron EN-
of burning-in
GJMW, black cast iron EN-GJMB
with high form stability
Plastics and other
General use
FRP, thermoplastics, rubber, wood
materials
on edge and surface
Catalogue page
30-31
32-34
= highly suitable
= suitable
* = extra models for foundries
4
I
203
Mounted Points
The Fast Way to the Best Tool
It is necessary to differentiate the selection
mounted point bond is comparatively soft
grades within the bonds are arranged from
criteria into material, application and required
and designed to give high stock removal.
“soft” to “hard”.
surface finish to find the optimum mounted
If edge grinding, the mounted points must
point and correct bond type. The mounted
be dimensionally stable. This is why the
Refer to the catalogue page
point bond and the grain mix have an impact
mounted point bond is comparably hard
for more information about the hardnesses,
on the grinding output, tool life and aggres-
and designed for a long tool life.
mounted point shapes, dimensions and grit
siveness of the tools.
sizes, the corresponding catalogue pages are
For general use, the emphasis is on the
Mounted point hardness
stated in the table.
balance between grinding output and tool
After determining the application (see col-
life.
umn ), the hardness can be selected in the
In surface grinding, the mounted points
horizontal row. The “highly suitable” bond
are subject to fewer loads. This is why the
is shown with a black dot (•). The hardness
Vitrified bond
Hardness D
Hardness F-Alu
Hardness H
Hardness I
Hardness J
Hardness K
Hardness M
Hardness O
Hardness R
Hardness T
AH
CN
AWN
AW
AWCO
ARN
ADW
AR
CU
AW
5-20 m/s
20-40 m/s
30-50 m/s
30-50 m/s
30-50 m/s
30-50 m/s
30-50 m/s
25-40 m/s
30-50 m/s
15-20 m/s
*
●■*
*
*
*
*
42
41
22-23
24-25
28-29
35-36
7-10
11-21
37-40
26-27
203 I
5

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