Cutless Bearing Installation
A brief guide for replacing a cutlass bearing
Cutless Bearing Installation
The following is a brief guide for replacing a cutless bearing.
Standard Shaft Bearing InstallationFor a marine cutless bearing to operate satisfactorily, it must be first mounted correctly within the stern tube or bracket, e.g. the bearing must be inserted with the landed area along the bottom to avoid damage on start-up. We do not recommend fitting a Brass Bearing into a housing of dissimilar metal – in cases of a Steel or Aluminium housing, a Phenolic, GRP or other composite bearing is advised. In marine applications, cutlass bearings are generally installed in a housing with a light press fit and held in place by either Loctite or cone point set screws to prevent it from spinning. If this is done, drill part way through the shell only. Do not lubricate the inside of the housing or the outside of the bearing shell. Often a second setscrew is installed on top of the first to lock the first setscrew in place. The bearing shell is spotted to receive the setscrews in such a manner as to prevent them from extending through the shell into the rubber and thus forcing the rubber against the shaft. This permits the setscrew to prevent movement of the bearing without requiring the screw to be so tight that distortion of the bearing could occur. |
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