Ferm BLM1005 Gebrauchsanweisung Seite 11

GB
µ‹Ì· (mm) ∂ÎΛÓËÛË (mm)
D
0.4 0.04
0.5 0.05
0.7 0.07
NL
0.8 0.08
1.0 0.1
1.25 0.125
F
1.5 0.15
1.75 0.175
2.0 0.2
E
2.5 0.25
3.0 0.3
P
¶ÈÓ.4
™˘ÌÏËڈ̷ÙÈο ÛÙÔÓ ›Ó·Î· - ‰Â‡ÙÂÚË ÛÙ‹ÏË - ·Ó·Ê¤ÚÂÙ·È ˆ˜ ÙÔ Ì¤ÁÂıÔ˜ ÂÎΛÓËÛ˘ ÌÔÚ› Ó· Ú˘ıÌÈÛÙ› Ì ÙË ¯Ú‹ÛË ÙˆÓ ›‰ÈˆÓ
I
ÙÚÔ¯ÒÓ ·ÏÏ·Á‹˜.
ÿÓÙÛ· ∞Ú. Ô‰fiÓÙˆÓ ·Ó¿ ÙÚÔ¯fi
RUS
n/inch A
48 70
GR
40 70
32 105
24 98
20 70
16 56
14 49
12 49
11 49
8 50
¶ÈÓ.5
94
∞Ú. Ô‰fiÓÙˆÓ ·Ó¿ ÙÚÔ¯fi
A B C
49 - 105
70 - 84
70 98 84
105 98 49
98 - 42
84 105 42
105 - 28
84 98 28
49 98 42
63 105 28
49 105 30
B C
- 79
84 79
98 49
- 40
84 40
84 40
105 50
98 40
105 39
105 28
Aperfectly sharpened chisel has to be placed in the tool holder in the right way now. Fig.14 indicates a correct placing of a pointed chisel. Point
1 is the center line. The tip of the chisel has to stand exactly that high. If not, you have to use bearing plates(5). The chisel always has to be
placed against the block body(4) and cannot extend farther than 1 to 1.5 time the tool shank thickness(2). It goes without saying that all
clamping bolts (3) have to be tightened strongly.
Turning speed
Fig. 15 & 16
If the chisel have been sharpened and put, the piece of work has been clamped well, the speed of the main shaft has to be adjusted with the V-
belts, watch Fig. 15 and 16. In the subjoined table some machining speeds which happen many times are indicated for different sorts of
chisels and materials.
Turning material
Unalloyed structural steel
(9S20k - 60S20k)
Alloyed structural steel
Tool steel (C80= Silversteel)
Cast Iron
Non-Ferrous
(Cupper, Aluminium)
Tab.3
With this table you can chose yourself for any diameter the right speed. The only thing you have to do is fill in the desired speed in the following
formule.
v = Cutting speed in meters per minute
d = Diameter of the piece of work in mm
n = Number of revolutions in revolutions per minute
 = Constant, nl. 3,14
v =  x d x n = v x 1000
1000  x d
Calculation example:
1. Around piece of silver steel of 100 mm has to be turned with a HSS chisel. You can find in the table that silver steel has to be turned with
32m/min, v=32. Divide 32.000 by 100 gives a number of revolutions of 320 revolutions per minute. We put belt 2 on the hindmost discs of
the intermediate and main shaft pulley.
2. Apiece of copper of 10 mm is turned with a HM-chisel. v=200 and through that "n" comes far above the maximum number of revolutions.
The highest number of revolutions can be adjusted. Belt two is layed on the hindmost disc of the motor and main shaft pulley.
Thread-cutting
Next to the usual turning work you do with the machine you can also cut screw- thread with this machine. For this special chisel have to be
used. The technique of thread-cutting is not very simple. For reaching a correct fit with thread-cutting, both the thread profile and the minor
and outside diameter have to be very accurate. Therefore many turners use existing machine screw taps. Screw plates can be used in the
same way, however a fitting holder has to be made yourself. Cutting takes place with very low numbers of revolutions( often 70 revolutions per
minute) or if need be by cranking, turning the main shaft with your hands.
For the cutting of inchthread, a separate set of gears is required. This set is not included. This set is available at your dealer under
Art.No BLA1006.
The continuously repeating distance between two permanent points of a screw thread is called the thread haste. If you are going to cut you
always have to adjust this thread haste. This happens by chosing a certain change wheel com bination on the scissors. In Fig.17 on the left
side a single transmission for thread-cutting is indicated ( a so-called single work) and on the right side a double transmission for the
automatical starting is indicated( so-called double work). Through this the support is moved over a certain distance during a rotation of the
main shaft. In the headstock two fixed transmission have been builded in, namely 1 : 4 for thread haste and 1 : 40 for starting, which decide the
number of revolutions of the coaxial datum axis. From this datum the end transmission has to be calculated. For calculating this some
formulas exist, but for the sake of convenience we already indicated the most current thread haste dimensions in the subjoined table. All
indicated wheels are delivered automatically with the machine! Installing or adjusting the change wheels happens by shifting the scissors
and the intermediate wheel axle and by placing the filling rings. Adjust the change cog-wheels margin.
Ferm Ferm
Chissel material Turning speed, rev/min
HSS 40 - 60
P10 140 - 160
HSS 32
P10 112
HSS 40
K10 100
HSS 45 - 80
K10 140 - 280
GB
D
NL
F
E
P
I
RUS
GR
11