example of recent modi- fications made in response to the de- mands of high-speed work is well il- lustrated by the radial drilling, bor- ing and tapping machine (Fig. 3) by the same firm. After the motor and all-geared drives, the feature which would attract most attention is the section of the… … the lathe bed inverted, the saddle be- FIG. 4. DOUBLE-PIPE SECTION OF RADIAL ARM OP ing gibbed to the square edges. DRILLING MACHINE, GIVING CENTRAL THRUST. The driving is done from a single MESSRS. D. & J. TULLIS, LTD.
Engineering
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