Best repair and calibration laboratory in southern California. Servicing all makes and sizes of precision dimensional measuring instruments and gauges with over 30 years expertise in the art of lapping OD micrometers. AIR’s skilled repair technicians can lap almost any brand of dial indicating, digital, vernier OD micrometers with carbide or steel anvils back to the factory specifications and in most cases for far less than purchasing one new. Here is a list of some of the more common OD micrometers we commonly lap. Brown & Sharpe, Bowers, Etalon, Fowler, Mahr, Mitutoyo, Scherr Tumico and Starrett.