Methods of machine shop work : for apprentices and students in technical and trade schools (1914)
Halsey, Frederick A. (Frederick Arthur), 1856-1935 · New York : McGraw-Hill · leaf 217
rious spindles are driven by suitable gears, all connected to acentral gear attached to the main spindle at the center.Other cases of multiple-spindle drill heads by the LangelierManufacturing Company are shown in Figs. 190-192. Eachof these is designed for a special piece of work and…
Machine-shop practice
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