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100% Inspection of:
- Inner diameter for Thrust Bearing 13-79-S
mounting
This assures proper pre-load and operation of the bearing
- Outer Diameter for mounting
in Revolving Head
NP-8-SA-GL, NP-8-SA-OS-GL
- Concentricity of outer diameter and inner diameters
Quality control coupled with state of the art production equipment assures NP-5080-389-bs is the finest available
Use with Spindle Box Nut NP-639-1
Includes: NP-5080-391 and NP-5080-389-R