I believe this is some sort of vintage lathe or milling spindle.The item “Machinist tool, vintage metal lathe spindle, vintage milling machine spindle” is in sale since Friday, April 17, 2015. This item is in the category “Business & Industrial\Manufacturing & Metalworking\Metalworking Tooling\Equipment Specific Tooling\Milling”. The seller is “liljscot” and is located in Bennington, New Hampshire. This item can be shipped to United States.

Lot of 5 hss. Staggered tooth milling cutters with 3/4″ bore & 1″ shank arbor. Moon poland and others. 2-1/8″ dia x 3/8″ cut. 2-1/8″ dia x 5/32″ cut. Powered by sixbit’s ecommerce solution.The item “5 HSS STAGGERED TOOTH MILLING CUTTERS 2-1/8 WITH 3/4 BORE & 1 SHANK ARBOR” is in sale since Friday, April 17, 2015. This item is in the category “Business & Industrial\Manufacturing & Metalworking\Metalworking Tooling\Equipment Specific Tooling\Milling”. The seller is “stm_surplus” and is located in Ellington, New York. This item can be shipped worldwide.