Technical data

9-4 Application Notes Rexroth IndraDyn T
DOK-MOTOR*-MBT********-PR03-EN-P
CAUTION
Impairment or loss of motor, machine or
cooling system!
⇒ It is essential that you take into account the motor
data and the explanations and conceptions of the
cooling systems in the documentation "Liquid
Cooling, Dimensioning, Selection", MNR.
R911265836.
⇒ Heed the manufacturer’s instructions when
constructing and operating cooling systems.
⇒ Do not use any lubricants or cutting materials from
operating processes.
⇒ Avoid pollution of the coolant as well as changes of
the chemical consistency and of the pH value.
Coolants
All information and technical data are based on water as the coolant. If
other coolants are used, these data no longer apply and must be
recalculated.
Cooling with flowing tap water is not recommended. Calcareous tap water
can cause deposits and damage the motor and the cooling system.
For corrosion protection and chemical stabilization, the cooling water
must have an additional additive which is suitable for mixed installations
with the materials AlSi5Mg (cooling jacket) and FPM (O-ring).
IndraDyn T motors can be damaged irreparably by using aggressive
coolants, additives and lubricants.
⇒ Use systems with a closed circulation and a fine filter ≤ 100 µm.
⇒ Avoid pollution of the coolant as well as changes of the chemical
consistency and of the pH value.
⇒ Heed the environmental protection and waste disposal instructions at
the place of installation when selecting the coolant.
Rexroth can give no general statements or investigations regarding the
applicability of process-related coolants or operating conditions.
Note: The performance test for the used coolants and the design of
the liquid coolant system are generally the responsibility of the
machine manufacturer.
Aqueous Solution
Aqueous solutions ensure reliable corrosion protection without significant
changes of the physical property of the water. The recommended
additives contain no materials harmful to water.
Emulsion with Corrosion Protection
Corrosion protection oils for coolant systems contain emulsifiers which
ensure a fine distribution of the oil in the water. The oily components of
the emulsion protect the metal surfaces of the coolant duct against
corrosion and cavitation. An oil content of 0.5 - 2 volume percent has
proven itself.
If the corrosion protection oil is responsible for not only corrosion
protection but also for lubricating the coolant pump, an oil content of 5
volume percent is necessary.