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The 160 series coordinate optical micrometer literally adds a another dimension to precision alignment.  We mounted two optical flats in an aluminum housing so that their axes of rotation are at 90 degrees ±15 arcseconds. This allows you to monitor two dimensions simultaneously. Many types of bore analysis jobs typically require this type of dual dimensional control.  The 160 will effectively convert any transit or level into an alignment telescope for this type of application.  Each micrometer translates the line of sight with an accuracy of ±0.0005" (or ±0.01mm).  The cast aluminum housing has a 1.655" opening to fit the telescope barrel of all Brunson optical tooling transits and levels.  Any of four machined slots in the housing (located at the 12, 3, 6, and 9 o'clock positions) fit over a locating pin on Brunson telescope barrels for quick and accurate indexing of the micrometer.  A precision glass window acts as a dust cover to protect the optical flats inside.  The 160 is available in both English and metric units (refer to the table below).  To use a 160 or 160M on an alignment telescope having a diameter of 2 1/4", please see our 160-A or 160M-A product.