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The OD of the bulkhead was turned to size.
Radial Indexing
First the radial indexer was checked for parallelism with the table using a precision ground rod.
Using the same custom mandrel as used with the lathe, the Payload Bulkhead was set up on the radial indexer.
The part zero was found using an edge finder and the starting angle was found by using a dial indicator and pins in the main face holes.
Holes were center drilled, drilled to 0.159" dia, and tapped to 10-32 at increments of 45 deg.
Deburring, of course.TBD
Manufacturing Defects
The ID surface finish is not very good, either the F/S were wrong or the tool was dull, or it need a contour finish pass. The rough surface finish made indicating it in on the lathe difficult.
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