Siemens 1FT7 - Balancing; Shaft End; Vibration Severity Grade

Mechanical properties of the motors
3.8 Shaft end
1FT7 Synchronous Motors
Configuration Manual, (PFT7S) 01/2009, 6SN1197-0AD13-0BP2
69
3.8 Shaft end
The drive shaft end is cylindrical in accordance with DIN 748 Part 3, IEC 60072-1. The force-
locked shaft-hub coupling is preferred for fast acceleration and reversing operation of the
drives.
Standard: plain shaft
Option: keyway and key (half-key balancing)
3.9 Balancing
The motors are balanced according to DIN ISO 8821.
Motors with featherkey in the shaft are half-key balanced. The mass equalization for the
protruding half key must be taken into account for the output elements.
3.10 Vibration severity grade
The 1FT7 motors conform to vibration magnitude Grade A in accordance with EN 60034-14
(IEC 60034-14).
The values indicated refer only to the motor. These values can be increased at the motor
due to the overall vibration characteristics of the complete system after the drive has been
mounted.
The vibration complies with the severity grade up to rated speed (n
N
).
Standard: Vibration magnitude Grade A
Option: Vibration magnitude Grade R (compliance with vibration magnitude Grade A and R
up to n
N
)
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Figure 3-12 Vibration severity grades