Not sure how old this is, I think it's from the 1930's or 40's.The shaft is 3" long and 1" OD. The sleeve is 3-3/4" long and has a 1" bore and a 1-3/4 OD. It has 1/2"BHS stamped on the side of the cutter blades.
This listing is for ONE (1) new old stock HSS Hollow Milling Cutter .500" OD x .300" ID .312" Shank .250" Depth Inside .125" Thru. Hole This new old stock tool has minor surface rust. Surplus came from aerospace manufacture.
Turret Lathe Practice, by the staff of International Correspondence Schools, published by International Textbook Co., Scranton, PA, 1947, ICS # 2213. 5 1/2 x 8 1/2 paperback, 55 pages. Reprinted in 2004 by Nation Builder Books, Leesburg, VA.
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