Aerotech 75mm Rear Closure Dimension

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Dad Man Walking

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Can one of you measure the depth of an Aerotech 75mm rear closure from the base to the top surface that bears against the aft O-ring? I had to machine the top surface down a little bit to remove some deep scratches that I put there while removing a particularly recalcitrant nozzle for the M685 motor.

We machined out the scratches and the surface is smooth again, but I forgot to measure the "before" dimension to know how much material was removed. After machining the depth measures around 1.4" The shiny surface in the attached image is the machined the surface, and I'm measuring distance from that surface to the base where contact the table surface.


IMG_0937.jpg
 
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