Technical data
① Radial shaft sealing ring
Fig.9-13: IndraDyn S radial shaft sealing ring
Radial shaft sealing rings are rubbing seals. Hence, they are subject to wear
and generate frictional heat.
Wear of the rubbing seal can be reduced only if lubrication is adequate and the
sealing point is clean. Here, the lubricant also acts as a coolant, supporting the
discharge of frictional heat from the sealing point.
● Prevent the sealing point from becoming dry and dirty. Always ensure ad-
equate cleanliness.
Under normal environmental conditions, the shaft seal is greased
for its lifetime. Under unfavorable environmental conditions (e.g.
grinding dust, metal shavings), maintenance could be necessary.
The materials used for the radial shaft sealing rings are highly resistant to oils
and chemicals. The performance test for the particular operating conditions lies,
however, within the machine manufacturer’s responsibility.
As of the publication date of this document, the following material assignment
is applicable:
Motor Sealing material Abbreviation
IndraDyn S Therban HNBR
Fig.9-14: IndraDyn S shaft sealing ring
The complex interactions between the sealing ring, the shaft and the fluid
to be sealed, as well as the particular operating conditions (frictional heat, soil-
ing, etc.), do not allow calculation of the lifetime of the shaft sealing ring.
The degree of protection on the flange side of motors with a shaft sealing ring
is IP 65. Hence, tightness is ensured only in case of splashing fluids. Fluid
levels present on side A require a higher degree of protection. For vertical in-
stallation position (shaft at the top) of the motor, please observe the additional
notes in chapter 9.4 "Design and Installation Positions " on page 160 .
Rexroth recommends that any direct contact of the drive shaft and the radial
shaft sealing ring with the processing medium (coolant, material corrosion)
caused by the machine or system construction should be avoided.
Wear
Resistance
Vertical installation positions IM V3
Note on construction
Project Planning Manual | Rexroth IndraDyn S Electric Drives
and Controls
| Bosch Rexroth AG 163/194
Operating Conditions and Application Notes