. Electric railway review . all details of_ every part of this tool and show-ing two views of the machine may be had on application to themanufacturer. The accompanying engraving illustrates the portable boringbar manufactured by H. B. Underwood & Co., of Philadelphia,which is designed for general cylinder boring. The bar can beoperated in a space no larger than that needed to remove thepiston from the cylinder, and by its use the reboring can oftenbe done in place in less time than the cylinder could be disman-tled and removed to stationary machines, with the advantage thatall steam connectio
. Electric railway review . all details of_ every part of this tool and show-ing two views of the machine may be had on application to themanufacturer. The accompanying engraving illustrates the portable boringbar manufactured by H. B. Underwood & Co., of Philadelphia,which is designed for general cylinder boring. The bar can beoperated in a space no larger than that needed to remove thepiston from the cylinder, and by its use the reboring can oftenbe done in place in less time than the cylinder could be disman-tled and removed to stationary machines, with the advantage thatall steam connections and the principal joints remain sizes in which the bar is made vary from a 2Vi-inch bar 5feet long for cylinders 4 inches to 12 inches in diameter by 30inches stroke, to a 12-inch bar 15 feet long for cylinders 60 to120 inches in diameter by 120 inches stroke. With each barenough cutter heads are furnished to cover the range of diametersfor which rhe is designed, and expanders to fit stuffing boxes. Portable Boring Bar. are provided. The feed screw and nut are of steel. The barsmay be either hand or power-operated. In a recent publication of the manufacturer the followingdirections for setting up and operating the bars are given: In reboring a cylinder tlie object is to make it perfectly true,and at the same time to remove as little metal as is doing this a great deal depends on the setting up of the barand the shape of the cutters. In setting up a bar to bore withboth cylinder heads off, bolt two blocks on each flange as nearoppoite each as it is possible to get them, using the cylinderhead bolts. If there is a raised face inside of these bolts, cleanit off. Back up the outer edges of the blocks with thin metal sothe face will be in line when screwed up tight. Place a suitablesize cutter-head inside of the cylinder, then put up the crossheadsthat support the sleeves or bearing; bolt the crossheads firmlyto the blocks, using the studs wit
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectstreetr, bookyear1906
