1.8 Standard features
1.8.1 Style
The basic style for the AKM synchronous motors is style IM B5 according to DIN EN 60034-7. The
permitted mounting positions may be read from the technical data of the motor series.
1.8.2 Shaft end, A-side
Power transmission is made through the cylindrical shaft end A, fit k6 (AKM1: h7) to DIN 748, with a
locking thread but without a fitted-keyway.
If the motors drive via pinions or toothed belts, then high radial forces will occur. The permissible
values at the end of the shaft may be read from the diagrams in chapter 3. The maximum values at
rated speed you will find at the technical data. Power take-off from the middle of the free end of the
shaft allows a 10% increase in F
R
.
The curves are based on a bearing life of 20.000 operating hours.
The axial force F
A
must not exceed F
R
/3.
Double-coned collets have proved to be ideal zero-backlash coupling devices, combined, if requi-
red, with metal bellows couplings.
1.8.3 Flange
Flange dimensions to IEC standard, fit j6 (AKM1: h7), accuracy according to DIN 42955.
Tolerance class: N
1.8.4 Protection class
Standard version IP65
Standard shaft bushing IP54
Shaft bushing with shaft-sealing ring IP67
1.8.5 Protective device
The standard version of each motor is fitted with an electrically isolated PTC. The switching point is
at 155°C ± 5%. The thermostat does not provide any protection against short, heavy overloading.
Provided that our preassembled resolver cable is used, the thermostat contact is integrated into the
monitoring system of the digital servo amplifier SERVOSTAR.
1.8.6 Insulation material class
The motors come up to insulation material class F according to DIN 57530. - E.4.929.4/09
Servomotors AKM 9
Kollmorgen 05/2006 General
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