NSK 51238-M Axial Deep Groove Ball Bearing - 190 mm ID, 270 mm OD, 62 mm Width Covers/Caps a hardened alloy compression ring

a hardened alloy compression ring of matching outside diameter

The Whittet-Higgins PW-30 is a precision lockwasher in the PW series

as well as corresponding pressure pieces

The tool and drill holders with ratchet from series 280 are tool holders for thread cutting and reaming deep-seated workpieces

NSK 51238-M Axial Deep Groove Ball Bearing - 190 mm ID, 270 mm OD, 62 mm Width Covers/Caps a hardened alloy compression ringAxial Deep Groove Ball Bearing NSK axial (thrust) deep groove ball bearings are designed to support pure axial loads and consist of shaft and housing washers and a ball and cage assembly. Single direction and double direction variants are available; single direction handles thrust in one direction only.