4.2.6 Degree of protection
The protection type according to EN 60034-5 is determined by the abbreviation
IP (International Protection) and two code numbers for the degree of protection.
The first code number stands for the degree of protection against contact and
ingress of foreign bodies. The second code number stands for the degree of pro-
tection against ingress of water.
Standard motors (specification according to type plate)
● IP64 without shaft sealing ring
● IP65 with radial shaft sealing ring
● IP67 with shaft sealing ring and sealing air connection
Additional specifications (not on type plate)
● Motors with fan
– IP65 fan motor
– IP2X safety fence fan propeller
4.2.7 Output shaft balancing and extension elements
Shaft end
Shaft Type
Smooth, without shaft sealing ring H
Smooth, with shaft sealing ring G
Keyway, without shaft sealing ring L
Keyway, with shaft sealing ring K
Tab. 4-8: Options according to type code
Smooth shaft
Cylindrical shaft end according to DIN 748-3 with frontal centering hole with
"DS" thread according to DIN 332-2.
The standard design for a non-positive shaft-hub connection without play and
excellent smooth running. Use clamping sets, pressure sleeves or clamping ele-
ments for coupling the machine elements to be driven.
Shaft with keyway
Cylindrical shaft end according to DIN 748-3 with frontal centering hole with
"DS" thread according to DIN 332-2 and keyway.
The keyway design allows form-locking transmission of torques with constant di-
rection and low requirements on the shaft-hub connection.
The machine elements to be driven have to be secured in axial direction via the
centering hole.
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About this product
MS2N Synchronous Servomotors
Bosch Rexroth AG R911347581_Edition 04
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