Model: NOV 109586-4 Bearing Retainer Shim
Material: Precision stainless steel thin plate
Structure: Circular multi-hole flange shim
Fit equipment: NOV Varco TDS-9SA / TDS-11SA top drive main bearing assembly
Function: Axial clearance adjustment for main spindle bearing
Operating environment: Anti-vibration, heavy load, drilling mud environment
Feature: Strict thickness tolerance, stacked combination adjustment
Maintenance: Only used during complete top drive overhaul
