
6. ALLOWABLE RADIAL LOAD
B–65152E/03
FANUC AC SPINDLE MOTOR α series
66
6
ALLOWABLE RADIAL LOAD
Use the motor output shaft below the allowable radial loads shown in the
table below.
Allowable radial load (kg)
Model
At output shaft end At output shaft center
a 0.5 30 33
a 1 40 45
a 1.5 90 100
a 2 90 102
a 3 150 164
a 6 200 225
a8 300 344
a 12, a 15 300 348
a 18, a 22 450 509
a30 550 626
a40 550 618
a 1/15000 40 45
a 2/15000 50 57
a 3/12000 100 109
a 6/12000 150 169
a 8/8000 200 229
a 12/8000, a 15/8000 250 290
a 18/8000, a 22/8000 300 340
a 30/6000 550 626
CAUTION
1 When using a belt, adjust the tension so the allowable loads indicated above are not exceeded.
If an excessive load is applied, consider the use of a support bearing on the machine side to
maintain the long–term reliability of the motor. (If an excessive load is applied, it is possible that
an abnormal sound may occur.)
2 When the belt tension is maximized at a point outside the output shaft end, the allowable loads
are less than those at the output shaft end.
3 If a thrust load is applied when a helical gear is used, the shaft moves in the direction of the
thrust. So, as a general rule, never apply a thrust load.