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ATM clearance in cell for small objective

To: atm@shore.net
Subject: ATM clearance in cell for small objective
From: ATM@antiquaries.com
Date: Fri, 30 Aug 2002 16:45:20 -0400
Reply-To: ATM@antiquaries.com
Sender: owner-atm@shore.net


I am making a brass cell for a small (42mm) cemented doublet.

How much clearance should I allow?  Is there a rule of thumb for how 
much bigger a cell's diameter should be?

Frank Manasek

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