A Treatise on the Construction and Use of Universal and Plain Grinding Machines, for Cylindrical and Conial Surfaces (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1891 Excerpt: ...from which the feed cone is driven, and the positions of the other shafts are determined by the cone pulleys. Drawing. A copy of a large scale drawing, with figures giving the correct location of the most important parts of the counter shaft, is sent with each machine. Speed. The speed of the back counter shafts should be about 250 revolutions per minute. Hangers. The hangers are provided with self-adjusting and self-oiling boxes. Capacity The machine will receive work between centres 20 of the inches diameter and 6 feet long, and the swivel table Machine.. will swing to either side of its central position to grind tapers from zero to 2 inches per foot, or from zero to 5 degrees in angular measurement. The head stock can be set to any angle within the whole circle, and the wheel slide has a movement of 12 inches, and can be fed at any angle from zero to 90 degrees on either side of a line at right angles with the ways of the machine. The wheel stand will take a wheel 12 inches diameter and J-inch thick, with a 5-inch hole in centre. The internal grinding fixture usually sent with the machine will grind holes 5X inches long, 2 inches and upwards in diameter. Wheels' up to 3 inches in diameter are used with this fixture. When a large wheel is used on the end of the spindle, a piston rod, for example, may be ground up to a piston 20 inches in diameter. The weight of the machine boxed ready for shipment is about 8,400 pounds. The floor space, measured over extreme projections and points of travel of the various parts, is 63 inches by 12 feet. Attach-Each machine is furnished with a drawing showing "entsandlocation of overhead works, a copy of this treatise, an Accesso-rJ rieS. internal grinding fixture, a special speed pulley with spindle and bearings for ...