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 TB 55-1900-201-45/1
Note 1
The vessel's plans should be referred to, in every case, prior to renewal of bearings.
Note 2. The values given above under column B are minimum operating bearing clearances for all types of sliding
contact bearings, after dimensional changes due to swelling or deflection of the wearing material have taken place.
Swelling characteristics of phenolic resin and lignum vitae bearing and deflection characteristics of natural or synthetic
rubber-faced bearing are such that the following additional allowances must be made, at time of installation of wearing
material, to correct for swelling and deflection characteristics as follows:
a. For phenolic resin bearings installed dry with cotton fiber laminations perpendicular to shaft axis, allow 1 percent
of wearing material thickness for swelling.
b. For phenolic resin and lignum vitae bearings installed wet after soaking for at least 6 months, no allowance for
swelling will be necessary, as swelling due to water absorption will have practically ceased.
c.
For natural or synthetic rubber-faced bearings, no allowance for deflection by installing activity will be necessary,
as wearing material is manufactured to final design dimensions which will provide minimum clearances.
Table C-1. Stern Tube and Strut Water-Lubricated Bearing Clearances (Sheet 2 of 2).
C-2
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