Fostex Model 80 reel bearings one is for the regular

one is for the regular smaller 1/4 inch machines

they are first inspected for wear and discarded if no good (  I have no say in this and have given the lap shop a free hand here) if it looks like they will lap ok they will be tested electrically then if thats ok they will be relapped

You just cannot sell a new but old stock that has sat in a bag 5 years and think its will perfom well

over time they will wear

Because of size goes as a packet

Fostex Model 80 reel bearings one is for the regularIn the Model 80 they used these bearings, over time they will wear, these cam from a low use home machine, I would add a liitle light oil on them from time to time.