Handy man's workshop and laboratory . iece ofcold-rolled steel 9/16 inch in diameter and 7 inches long. Thisshould be held in the lathe chuck while truing up each of theends and drilling the centers in them, after which it may be sup-ported between the lathe centers and finished all over. Make thecentral portion y2 inch in diameter and 2^ inches long, and thebearing portions 7/16 inch in diameter. The latter, after beingturned and filed as smoothly as possible, should be given a polishwith a piece of very fine emery paper wet with machine oil. The best material for the spider is a brass castin
Handy man's workshop and laboratory . iece ofcold-rolled steel 9/16 inch in diameter and 7 inches long. Thisshould be held in the lathe chuck while truing up each of theends and drilling the centers in them, after which it may be sup-ported between the lathe centers and finished all over. Make thecentral portion y2 inch in diameter and 2^ inches long, and thebearing portions 7/16 inch in diameter. The latter, after beingturned and filed as smoothly as possible, should be given a polishwith a piece of very fine emery paper wet with machine oil. The best material for the spider is a brass casting, for which itis not difficult to make a wood pattern by turning off a piece ofwhite pine in the lathe. A very good substitute for the brass,however, can be made of Babbitt metal, or of ordinary plumberssolder, which can be cast at home in a sand or plaster of Parismold, or even m a wooden one. The rough spider casting shouldbe drilled with a 31/64-inch drill, reamed to y2 inch to fit the HANDY MAN S WORKSHOP AND LABORATORY 271 2Crq. 272 HANDY MAN S WORKSHOP AND LABORATORY shaft, and secured to the latter by pinning with a small steel one of the suggested methods of making the casting at homebe adopted, there is no reason why the spider may not be castright on the shaft itself, thereby saving the trouble of fitting itto the latter afterward. The cylindrical surface of the spidermust be turned in the lathe to a length of 2^4 inches and a diam-eter of 2^2 inches, or rather, to such a diameter as will permit ofthe rotor plates being put on easily without being loose enoughto shake. On the inside the spider should be finished all over,to make it as light as possible and to keep it balanced. The rimneeds to be about 3/32 inch thick, and the arms and the hubabout 3/16 inch thick. The six holes shown at A in Fig. 220 arenot merely for ornament, but are to allow of air passing throughthe machine for ventilation. Assemble the rotor core plates on the spider with one of thecopper
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Keywords: ., book, bookcentury1900, bookdecade1910, booksubjectworkshoprecipes
