Operation
Version 1.0 - 2020-12-22
148
Translation of original instruction
TU2506VB
EN
T
U
2506V
B_GB
_4.
fm
cross feed / longitudinal feed with feed rod
at the same time.
NOTES!
Example of an external thread:
The workpiece diameter must have been turned to the diameter of the desired thread.
The workpiece requires a chamfer at the beginning of the thread and an undercut at the
thread run out.
The speed must be as low as possible.
The thread cutting tool must be exactly the same shape as the thread, it must be absolutely
rectangular and must be clamped in a way that it coincides exactly with the turning centre.
The threading engaging lever must be engaged during the whole thread cutting process.
This does not apply to thread pitches that can be carried out with the thread gauge.
The thread is produced in various cutting steps in a way that the cutting tool has to be
turned out of the thread completely (with the cross slide) at the end of each cutting step.
The tool is withdrawn with the lead
screw nut engaged and the thread cut-
ting tool disengaged by actuating the
"Direction of rotation control lever".
Stop the lathe and feed the thread cut-
ting tool in low cut depths using the
cross slide.
Img.4-46: Illustration: Thread cutting
Before each passage, place the top slide approximately 0.2 to 0.3 mm to the left and right
alternately in order to cut the thread free. In this way, the thread cutting tool cuts only on
one thread flank with each passage. Do not execute any more free cutting, just before
reaching the full thread depth.
4.22
Cooling lubricant
WARNING!
Ejection and overflowing of coolants and lubricants. Make sure you do not get the
cooling lubricants on the floor. Spilled on the floor cooling agents must be removed
immediately.
Friction during the cutting process causes high temperatures at the cutting edge of the tool.
The tool should be cooled during the milling process. Cooling the tool with a suitable cooling
lubricant ensures better working results and a longer service life of the cutting tool.
INFORMATION
The lathe is lacquered with a
one-component paint
. Consider this fact when selecting your cool-
ing lubricant.
The company Optimum Maschinen Germany GmbH does not assume any guarantee for sub-
sequent damages due to unsuitable cooling lubricants.
The flashpoint of the emulsion must be higher than 140°C.
Thread undercut
Feed