Rolls-Royce 20/25 - crankshaft damper

 

 

old&new

 

 

Old and new.  The driven disk was corroded and had already been ground below limit.  The disk is held in place by 4 rivets; visible in the photograph.

thick&thin

 

 

The old disk resting on top of the overhauled and reground replacement.  The new disk is 0.088" thick compared with 0.061" of the old one.

pressure plates

 

 

Rear and centre elements of the damper, which have been reground with a minimum of material removed.