Metal-work; a handbook for teachers and students (1914)
Adam, Hugh M. [from old catalog], Evans, James Humphrey, [from old catalog] joint author · New York, Longmans, Green and co.; London, E. Arnold · leaf 209
r rod is then turneda quarter - revolution,and a second Ime scribed,this process being re-peated in each quadrant.The small square formedby the intersecting lines(Fig. 178) encloses thecentre, which can now bejudged quite accurately.Another tool forlocating the centre isthe bell centre punch(Fig.… … CenteringSquare <-—^ Fig. 178.—Methods of CenteringFOR Lathe.
Metal-work
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