A helicopter rotor damper system for damping a motion of a helicopter blade relative to a helicopter rotor, said system including: a torsional damper at least a first elastomeric torsional damper having a first torsional elastomer bonded between a damper first nonelastomeric bonding surface and a first damper second nonelastomeric bonding surface, at least a second damper, having a second damper torsional elastomer bonded between a second damper first nonelastomeric bonding surface and a second damper second nonelastomeric bonding surface, and a damper link linked with said torsional damper, wherein said torsional damper and said link are connected between said blade and said rotor with said first damper first bonding surface rotating relative to said first damper second nonelastomeric bonding surface, and said second damper first bonding surface rotating relative to said second damper second bonding surface, characterised in that that damper has a centering bearing providing a center of rotation axis, and in that said damper centering bearing is comprised of a nonelastomeric outer housing member, having a centering bearing housing cavity with an inner circumferential bonding surface, and a centering bearing nonelastomeric inner member contained in said housing cavity, said centering bearing nonelastomeric inner member having an outer circumferential bonding surface, and a centering bearing elastomeric intermediate having an outer circumferential elastomeric bonding surface and an inner circumferential elastomeric bonding surface, said outer circumferential elastomeric bonding surface bonded to said cavity inner circumferential bonding surface and said inner circumferential elastomeric bonding surface bonded to said outer circumferential bonding surface. a torsional damper at least a first elastomeric torsional damper having a first torsional elastomer bonded between a damper first nonelastomeric bonding surface and a first damper second nonelastomeric bonding surface, at least a second damper, having a second damper torsional elastomer bonded between a second damper first nonelastomeric bonding surface and a second damper second nonelastomeric bonding surface, and a damper link linked with said torsional damper, wherein said torsional damper and said link are connected between said blade and said rotor with said first damper first bonding surface rotating relative to said first damper second nonelastomeric bonding surface, and said second damper first bonding surface rotating relative to said second damper second bonding surface, characterised in that that damper has a centering bearing providing a center of rotation axis, and in that said damper centering bearing is comprised of a nonelastomeric outer housing member, having a centering bearing housing cavity with an inner circumferential bonding surface, and a centering bearing nonelastomeric inner member contained in said housing cavity, said centering bearing nonelastomeric inner member having an outer circumferential bonding surface, and a centering bearing elastomeric intermediate having an outer circumferential elastomeric bonding surface and an inner circumferential elastomeric bonding surface, said outer circumferential elastomeric bonding surface bonded to said cavity inner circumferential bonding surface and said inner circumferential elastomeric bonding surface bonded to said outer circumferential bonding surface.