Filling Lubricant Ducts In The Spindle - SKF MicroDosage System Assembly Instructions Manual

4. Assembly

4.2.3 Filling lubricant ducts in the spindle

Within the spindle, there are lubricant ducts
through which the lubricant is transported
from the connecting points on the spindle to
the bearing lubrication points.
The ducts have a volume which must be
filled during commissioning, comparable to
the filling of capillary lines.
Two variables must be known in order to fill
precisely.
1. The volume of the lubricant ducts
2. The lubricant volume per minute in the
MDS's filling mode
1. The length and diameter of the lubricant
ducts depend on the spindle design and
are typically different for each bearing
lubrication point. Information on the ex-
act volumes can be obtained from the
spindle manufacturer.
2. The volumetric flow provided by the micro-
dosage system in filling mode depends on
the viscosity and consequently on the am-
bient temperature. It is between 100 and
200 mm³/min. The exact value can be
determined during the filling procedure for
the capillary lines (see Chapter 6.3.1).
This involves measuring the time required by
the volumetric oil flow in filling mode to fill
one meter (for example) of the capillary line
(1 m 200 mm³ with internal diameter =
0.5 mm).
The filling time is as follows:
FT = DV / FQ [s]
FT: Filling time for duct in s
DV: Volume of lubricant duct in mm³
FQ: Volumetric flow of the MDF in filling
mode in mm³/min
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If the volumetric oil flow in filling mode is not
available or only very small volumes are to be
filled, a defined quantity of lubricant can also
be set using the rotary switches (SV) on the
MDS, for example 5 mm³/min.
The filling time is as follows:
FT = DV / SF [s]
FT: Filling time for duct in s
DV: Volume of lubricant duct in mm³
SF: Set volume on MDS in mm³/min
EN