Siemens 1FK7 Series User Manual

Maintenance
9.1 Inspection and maintenance
Synchronous Motors 1FK7
Operating Instructions, 03/2011, 610.40700.40c
47
9.1.3 Bearing change interval
The bearings are subject to wear and must be replaced after a defined number of operating
hours. For average load levels, the bearings must be replaced after approx. 25 000 h.
The lifetime can be extended if the motor is operated under favorable conditions (e.g. low or
medium speeds, low radial forces (cantilever forces), vibration load).
NOTICE
Harsh operating conditions
If the motor is subject to harsh operating conditions (e.g. continuous operation at n
max
, high
vibration/shock loads, frequent reversing duty etc.), the bearing replacement intervals t
LW
can decrease by up to 50%.
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Siemens 1FK7 Series Specifications

General

Product type	Synchronous motor
Encoder	Incremental encoder, absolute encoder
Cooling method	Natural cooling, forced-air cooling
Degree of protection	IP64, IP65
Speed range	Up to 9000 rpm
Feedback system	Encoder or resolver