Mechanical properties of the motors
3.2 Degrees of protection of the motor
1PM6/1PM4 Hollow-Shaft Motors for Main Spindle Drives
48
Configuration Manual, PPMS, 04/2008, 6SN1197-0AD23-0BP0
3.2
Degrees of protection of the motor
The degree of protection designation in accordance with EN 60034-5 (IEC 60034-5) is
described using the letters "IP" and two digits (e.g. IP64).
IP = International Protection
1st digit = protection against ingress of foreign bodies
2nd digit = protection against harmful ingress of water
Since most coolants used in machine tools and transfer machines are oily, creep-capable,
and/or corrosive, protection against water alone is insufficient. The motors must be protected
by suitable covers.
Attention must be paid to providing suitable sealing of the motor shaft for the selected
degree of protection for the motor.
NOTICE
A permanent covering of liquid on the flange is not permitted when the motor is mounted
with the shaft end facing upwards (IM V3, IM V36).
3.3
Bearing version
Bearing version for 1PM⃞ standard: Deep-groove ball bearings with life grease lubrication
Bearing version for 1PM⃞ with option L37: Spindle bearings
A drive output without any radial force is required, e.g. a coupling drive output.
Single-row (race) bearings with deep-groove ball bearings (1) or spindle bearings with option
L37
The bearings are sealed at both ends and designed for a minimum ambient temperature in
operation of -15° C.
Note
We recommend that the bearings are replaced after approx. 25000 operating hours,
however, at the latest after 5 years.
