National C-175 Rotary Table
Overview
The National C-175 is a 17½-inch bore rotary table (i.e. the opening where the drill string passes) with nominal 44-inch centers between table axis and inner row of sprocket
It's part of the “C” series of National / NOV rotary tables for drilling rigs.
It's part of the “C” series of National / NOV rotary tables for drilling rigs.
From references and comparative charts:
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