Thread Cutting; Cooling Agent; Cooling Lubricants - Optimum OPTiturn TH 3309 Betriebsanleitung

4.19.6 Thread cutting

The thread cutting process requires that the operator has a good knowledge of turning and suf-
ficient experience.
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The tool is withdrawn with the lead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.
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.

4.19.7 Cooling agent

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
Use a water-soluble and non-pollutant emulsion as a cooling agent.This can be acquired from
authorised distributors.
Make sure that the cooling agent is properly retrieved. Respect the environment when dispos-
ing of lubricants and coolants. Follow the manufacturer's disposal instructions.

4.19.8 Cooling lubricants

INFORMATION
The lathe is lacquered with a
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.
EN
TH3309 | TH3309D
122
Img.4-21: Illustration: Thread cutting
one-component paint. Consider this fact when selecting your cool-
Translation of original instruction
Thread undercut
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Version 1.1.0 - 2020-08-06