Compact Linear Actuator with Ball Screw Drive - Schaeffler Group

Compact linear actuator
with ball screw drive
Lubrication The guidance systems and the ball screw drive in the compact linear
actuators are supplied with an initial grease filling of a high quality
lithium complex soap grease KP2P–35 to DIN 51 825 and must be
relubricated during operation.
Lubrication of the guidance systems The guidance systems and the ball screw drive (the contact zones
between the rolling elements and raceways) must be lubricated.
The relubrication intervals are essentially dependent on the carriage
travel speed, the load, the operating temperature, the stroke length
and the environmental conditions. The cleaner the environment,
the lower the lubricant consumption.
The carriage must be moved during the lubrication process.
The carriage must be moved slowly during relubrication
of the spindle nut (Figure 6 � or �).
Relubrication should be carried out using a lithium or lithium
complex soap grease with a mineral oil or poly-alpha-olefin base.
If different greases are used, their miscibility and compatibility
must be checked first.
The viscosity of the base oil should be in the range ISO-VG 68
to ISO-VG 100. The consistency corresponds to NLGI class 2.
The grease must have particular anti-wear characteristics at loads of
C/P � 8. This is indicated by the letter P in the DIN designation,
for example: DIN 51 825–KP2P–35.
Relubrication should be carried out wherever possible with several
partial quantities at various times instead of the complete quantity
at the time of the relubrication interval.
Relubrication is carried out via three lubrication nipples on
the longitudinal faces of the carriage.
Lubricant must be supplied to the guidance system from the left
and right (lubrication points � and �) and can be supplied to
the ball screw drive from the left or right (lubrication point � or �).
�, � Lubrication points for the linear
recirculating ball bearing units
�, � Lubrication points for the spindle nut
Figure 6
Lubrication points
For relubrication, a conical or needlepoint grease nozzle must be
used to press the lubricant into the lubrication nipple.
12 TPI 181 Schaeffler Group Industrial
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00014863