Optimum 3425010, Operating Manual

Page: 125 / 188

Operation
Version 1.0 - 2020-12-22 125 Translation of original instruction
TU2506VB EN
T
U
2506V
B_GB
_4.
fm
4.10.3 Tables for thread cutting
INFORMATION
The threading table is located on the machine.
The tables are built up in a way that you may later on
assemble the required combination to cut a thread with-
out having to look up the details. Ligature as orientation
for the caming of one toothed wheel to the following one.
The identifier "H" stands for bushing or a small toothed
wheel as an auxiliary distance. This smaller toothed
wheel as an auxiliary distance must of course not be
camed in with any other toothed wheel.
The gear transmission ratio [ i ] of a gear is the ratio of
the driving toothed wheels to the driven toothedwheels.
Sample calculation for 0.75 mm pitch on lathe TU 2506:
Sample calculation for a feed rate of 0.1 mm:
The figure 3 in the above calculation is the pitch of the
lead screw.
The figure 40 is the 1st drive unit, with 40 teeths on the
main shaft of spindle (shaft lathe chuck).
Vg, designates the feed gear.

Feed gear (Vg) position < c > transmission ratio = 0.5

Feed gear (Vg) position < a > transmission ratio = 1

Feed gear (Vg) position < b > transmission ratio = 2
Connecting lines from one number to the next number
represent the mesh from one gear wheel to the next gear
wheel. The designation "H" stands for sleeve or a smaller
gear wheel as spacer. This sleeve is included in delivery.
The designation
a b c
of the change gear table designates the position of the selector lever on
the feed gear.
Z
2
Z4
L
Z1
Z3
Z1 Z2
H
25 70 30 60
Z4 Z3 75 20 75 20
L H 80
80
0.07 0.10
0.14 0.20
0.28 0.40
mm
Z1 Z2 H 45 H 45 H 45 H 60 H 45 H 30 H 50
Z4 Z3 60 70 60 85 50 75 45 50 50 80 60 85 45 85
L 65 H 60 H 60 H 85 H 65 H 80 H 70 H
8 9 9.5 10 11 12 14
16 18 19 20 22 24 28
32 36 38 40 44 48 56
n/1”
Z1 Z2 0 0 45
5 0 H 60 H 45 H
0.2 0.3 0.5 0.625 0.75 0.875 1
0.4 0.6 1 1.25 1.5 1.75 2
0.8 1.2 2 2.5 3 3.5 4
H 5 H 5 H H 45 H 45 H 45 H 60
Z4 Z3 20 75 30 80 50 80 50 80 60 80 70 80 60 80
L 80 H 75 H 7 H 60 H 6
TU2506
40 Z
c
a
b
b
a
c
c
a
b
i = 3 x Vg x
40 x Z2 x Z4
Z2 x Z3 x L
= 3 x 0.5 x
40 x 45 x 60
45 x 80 x 60
= 0.75
i = 3 x Vg x
40 x Z1 x Z3
Z2 x Z4 x L
= 3 x 0.5 x
40 x 30 x 20
60 x 75 x 80
= 0.1