Description
3.6 Shaft seal
A5850-02en Edition 06/2022 27
3.6 Shaft seal3.6 Shaft seal
Introduction
Depending on requirements, shaft seals prevent oil from escaping from the gear unit or dirt
from entering the gear unit.
3.6.1 Rotary shaft sealing rings3.6 Shaft seal
Rotary shaft sealing rings are the standard seal used. Wherever possible, rotary shaft seal-
ing rings are equipped with an additional dust lip which protects the actual sealing lip against
external contaminants.
NOTICE
Irreparable damage to the rotary shaft sealing ring caused by high concentration of
dust
A damaged rotary shaft sealing ring might not be able to effectively seal the gear unit.
In very dusty atmospheres, do not use rotary shaft sealing rings unless they have addi-
tional protection.
The diagram below shows a rotary shaft sealing ring
Figure3-4:Rotary shaft sealing ring
3.6.2 Labyrinth seals3.6 Shaft seal
Labyrinth seals as non-contact seals prevent shaft wear. They do not require any mainten-
ance and improve the temperature behaviour of the gear unit. Labyrinth seals can only be
used for certain gear ratios and minimum speeds.
The spare parts drawing and spare parts list specify whether or not the gear unit is equipped
with labyrinth seals.
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