Yaesu GS-680U universal bearing

Yaesu GS-068U provides correction for rotator offset, and allows replacement without removing the mast.

Makes alignment with the rotator unnecessary, with skew up to 5º, when used with an absorber joint (GA-2500/GA-3000)
Can be separated into two pieces, allwing installation even on a mast that is already installed
The mast retainer is held with two bolts and a clamp, greatly facilitating installation
A grease nipple enables lubrication without disassembling the bearing