The Clausing telephone # is 800-323-0972.? I haven’t called them in several weeks so don’t know how the COVID-19 problem has affected them.

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As Jon and/or Mike wrote, “109” on the front of a Sears model number is the Sears Contractor Code for AA or Double-A.? The equivalent number for Atlas Press, Atlas-Clausing. Clausing-Atlas and Clausing is “101”.? The only things in common between the two companies and their equipment are that at one time or another they both built 6” Swing lathes and off and on over the years, they were both sometimes located in Kalamazoo, MI.? The only parts that any Atlas and any AA lathe have in common are that supposedly the Change Gears are interchangeable.?

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The ball bearing Atlas 3950 (and the Craftsman equivalent 101.21200) used the same cross slide and compound assembly as the Atlas 612 and 618 and the Craftsman 101.07301. 101.21400 and 101.21200.? They are relatively plentiful on eBay and several independent dealers such as My Machine Shop have or have had them.? The later Atlas 10100 originally shipped with the same parts and were later changed slightly but are still interchangeable.

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If you log onto groups.io and go to atlas-craftsman, you will find in our Files section the Atlas owner’s and parts manual on the 3950.

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