The techniques used to bond the shell and rubber ensures strength of bond that matches the strength of the rubber itself. That is this bond will not be the weakest link in the chain.

Bores of all bearings are machined with correct clearances to suit shaft diameters. A standard clearance of 0.1mm per 100mm with tolerance – 0.001~ 0.004 inches per inch of shaft diameter is specified. This allows for any dimensional change due to water absorption to be properly managed and still give sufficient running clearance.