Files
General Information
Several criteria determine the quality of a PFERD product
An appropriate steel microstructure,
Exact shape and uniform cut from tang
Ideal tooth geometries for every
essential for uniform hardness
to tip
application
The various production steps (profiling in the
Blanks acquire their exact shape, indispensa-
Tooth forms suitable to a particular applica-
rolling mill, shaping of blanks and tangs, an-
ble for an appropriate performance, through
tion ensure a uniform stock removal capability.
nealing processes prior to cutting, final heat
a series of forging and grinding operations.
There is no such thing as a standard tooth
treatment) each cause a change in the micro-
Equally spaced teeth and a uniform depth
shape. Different cut geometries have been
structure of the steel. Throughout these treat-
of cut ensure good filing results and surface
derived as the optimum solution to a variety of
ments, it is essential to maintain a high carbon
finishes. The type and angle of the cut depend
applications. The illustration shows a car body
content to ensure the requisite hardness and
on the purpose for which the file is intended.
file profile with its typical rounded tooth face
cutting performance of the file.
and large interspace.
Teeth number per cm of cut files according to DIN 8349
The number of teeth of PFERD files listed in
our catalogue 201 conforms to DIN 8349
Length
Machinist‘s files
Sharpening files
requirements. The figure shows the number
(with-
Cut number ± 8 %
Cut numbers ± 5 %
of cuts per cm of file length, counted in the
out
Cut 1-B
Cut 2
Cut 3-S
Extra
Double
Mill Saw Files
tang)
longitudinal axis. For a double-cut file, the
regular
slim
Bastard
half-smooth
smooth
slim
Extra slim
Cut 1
Cut 2
[mm]
teeth number is determined by the upper cut
100
17
22
28
20
23
26
-
-
-
(second course).
125
-
-
-
19
22
24
25
-
-
Determination of teeth number
150
13
18
22
17
20
22
24
20
24
175
-
-
-
16
19
21
23
-
-
Lower cut
Tang
200
10
14
18
15
17
20
22
18
20
-Files
250
9
12
16
14
16
17
-
16
18
Axis
300
8
11
14
-
-
-
-
14
16
350
7
10
13
-
-
-
-
12
14
9 teeth
Upper cut
File level
Example:
Cut 1 = coarse / Cut 2 = medium / Cut 3 = fine
Overview of file designations
At a length of 250 mm, a cut 1 file has 9
Colour code for the file cut
according to DIN
teeth/cm. A 100 mm long file of the same
The individual cuts are additionally
cut has 17 teeth/cm of file length. The higher
identified by colour-coded package
number of teeth found on shorter files is
labels.
intended to provide the same ease of use (in
terms of force input, guidability and stock re-
Designation
moval) on surfaces and edges as a longer tool.
Cut 1 = green
Cut 2 = yellow Cut 3 = red
7261
7262
7263
7264
7283
DIN
Hand
A
E, F
A, B
A, E
A
lates à main
lates à main
lates à main
Flat
B
B
Dimensions
mm
Bastard
mm
Halbschlicht
mm
Schlicht
bâtarde
demi-douce
douce
A, B,
1112
250
1
1112
250
2
1112
250
3
Three square
C
C
C, D
Square
D
B
D
file length
Tang
Half round
E
C, D
F
D, F
E
The cross-sectional dimensions indicated
Round
F
E
C
F
in the tables are measured across the cut
and may vary depending on cut type.
Knife files
G
G
PFERD files are manufactured according to
Lathe files
H
DIN and ISO standards.
201 I
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