Siemens SIMODRIVE 6SN11 Series Planning Manual page 532

1PH7 AC Main Spindle Motors
3.2 Cantilever/axial force diagrams
Cantilever force
shaft height 100
F [N]
QAS
3000
2000
1000
DE bearing: 6308
NDE bearing: 6208
1PH7
Estimated lifetime for other operating conditions (F
L
Fig. 3-60
1PH7/3-104
Permissible cantilever force for a standard bearing design
1 2 3 4
F
1QAS
100
=
htot
q q q
1 2
+ +
L L L
h1 h2
Cantilever force diagram shaft height 100 for standard bearings
5 6 7
F F
QAS 2QAS
x
; n)
QAS
q = Time for which this is effective
3 [%] under constant conditions
h3
 Siemens AG 2000 All rights reserved
SIMODRIVE Planning Guide Motors (PJM) – 11.00 Edition
L 8000 h
h1
L 12000 h
h2
L 16000 h
h3
9 @ 10 n [RPM]
3
8
F = 0.9 F
1QAS QAS
F = 1.1 F
2QAS QAS
x = 40 mm
6SN1197–0AA20
09.00