CUTLASS BEARING BRASS

Description

The CUTLASS BEARING BRASS is used as a bearing for propeller shafts in both strut and stern tube arrangements. These CUTLASS BEARING BRASS are also used for rudder-stock and pintle bushings.

The bearing diameters are precision fitted to the designated size of shaft and tube with the correct clearance for efficient water lubrication. External brass shells are machined and polished to provide easy fitting, and specially formulated oil and chemical resistant nitrile rubber is bonded securely to the shell. Cutlass bearings with thin shells are available for the struts of small craft. These sleeve bearings usually fit with light press-fitting and are locked in place by cone-pointed set screws.

The elastic characteristic of the rubber polymer allows the landing surface to deform and create a natural pocket allowing a hydrodynamic lubricating film to completely separate the bearing surface and the shaft. At this stage the coefficient of friction is well under 0.001, reducing “system wear” to a negligible amount. Furthermore, a seal is created at the leading and trailing ends and bearing “land” areas causing hydrodynamic grit rejection. Abrasive grit is flushed out through alternating grooves, protecting the shaft from damage.

They are available in both Imperial and Metric sizes, and come in shaft sizes from 3/4″ to 6-1/2″. They come with naval brass sleeves, or a non-metallic structure of engineered reinforced thermoset plastic. 

Note: When shrink fitting of the bearing is required, chilling must be achieved by gradual cooling to not more than minus 20 deg. F/-28 deg. C using freezer or regular isce (do not use dry-ice). Pounding or shocking the bearing while in the chilled state could cause the rubber to separate from the shell.

Notice: Please do not hesitate to ask if it is in stock before purchasing. 

Stones Boatyard
The Marine Store@Stones Boatyard
Duramax Marine LLC