https://www.jemautomatics.com/screw-machine-spare-parts/acme-gridley-attachment-repair-parts/high-speed-drilling-attachment/drive-sleeve-assembly-am-413460/am-413460-item-2-bearing-retainer
AM-413460 item 2 - Bearing Retainer
Acme Gridley replacement part number B-713530
itembearingretainer