Waukesha Bearings Tilting Pad Journal Bearings with Forced Lubrication User Manual
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Observe the indicator on the bearing as the shaft is slowly lifted. Once the bearing lifts, as indicated
by the dial indicator, stop lifting the shaft. The lift is the difference between the two indicator
readings. Note that the lift with tilt pad bearings will always be more than the actual bearing set
clearance due to shaft movement between pads. Multiply the indicated lift clearance by the
following values, depending on the configuration of the bearing:
Bearing Configuration
Lift Check Correction Factor
3 Pad
.667
4 Pad
.707
5 Pad
.894
6 Pad
1
After the clearance has been checked, install the bearing cap and tighten the split line bolts on the
bearing.
IV. OPERATION
These bearings are designed for forced lubrication with outside cooling of the oil. Oil should be
supplied prior to rotation of the rotor and at all times during rotation. The supply pressure must be
controlled to the level specified. Maintenance of a clean oil supply is critical to the satisfactory
operation of the bearing. A suitable filter in the system is generally essential. A high quality turbine
type oil with rust and corrosion inhibitors is recommended for most applications.
As the bearing surfaces are separated completely by an oil film during operation there is virtually no
wear and thus no periodic adjustments or maintenance procedures are specified. The only attention
normally required is to maintain the proper supply of clean oil at the proper temperature.
The use of thermocouples or RTDs embedded into the journal pads is often made to provide a monitor
on bearing and machine performance. Such sensors, if used, provide a responsive and accurate check
on bearing operation. Normal operating temperatures are established and then alarm and/or shutdown
signals may be set.
V. SERVICE
Disassembly procedures generally follow from the assembly procedure for the specific bearing and
machine under consideration.
If replacement or repair of parts are required, prompt attention will be given by Waukesha Bearings
Corporation to supply the necessary service. Refer to the specific bearing drawing and item number
when ordering parts.