diameter of the driver and its revolutions. with the steam space, A, and its space, A, is always also ar LE Rule—Multiply the diameter of the driver-pulley by its IT Gas full of steam, so that it heats the lard in the center number of revolutions per minute, and divide the pro- while the… … ter of the driven. xample—The diameter of the driver is 12 inches, making 100 revolutions per minute: what shall be the diameter of the driven to make 200 revolu- tions in the same time? 12 100+200=6 inches in diameter. 3. As it is sometimes necessary to alter driver-pulleys their cleanliness and…
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