Popular Science Monthly 



293 



thread on the spindle and to drill and 

 thread a corresponding hole in the face 

 plate. 



Another method of making a face-plate 

 is to thread the spindle to receive a large 

 nut, to which a metal disk about ^ in. 

 thick and 4 in. in diameter has been fast- 

 ened with small machine-screws. It is 

 well to have the surface of the face-plate 

 turned true in a machine-lathe. Holes for 

 I by 3/16-in. stove or ma- 

 chine bolts are drilled and 

 threaded in the face-plate. 

 A babbit metal collar for the 

 outer end of the spindle may 

 be cast by building up a 

 paper mold around the spin- 

 dle as indicated in the draw- 

 ing. The spindle should 

 first be wrapped with a 

 single thickness of paper as 

 for casting the bearings. 



Another way to make a 

 collar is to thread the end of 

 the spindle to receive a large 

 nut. The rounded face of 

 the nut should be placed 

 next to the standard and the 

 thread cut the proper dis- 

 tance down the spindle so 

 that the nut shall bind upon 

 the end of the thread, before 

 it binds upon the standard. 

 Metal plates 3 in. long, 2 in. 

 wide and }/^ in. thick are 

 screwed to the outer faces of 

 the standards to recei\'e the 

 end-thrust of the spindle. 

 The pulley is about 3^ in. 

 in diameter and is secured to 

 the spindle by a pin. The 

 faces of the pulley and drive-wheel should 

 be turned slightly convex. The support 

 for the tool-rest is made of two wood pieces 

 each 14 in. long, 2 in. wide and i in. thick, 

 fastened together by means of cross strips, 

 leaving a >^ in. slot between the pieces to 

 receive the center bolt. Hand wheels 2 in. 

 thick and 3 in. in diameter are used for 

 tightening the nuts on the bolts of the tool- 

 rest and tail-stock. The wheels may be 

 turned from wood. 



The tail-stock is built up of three blocks 

 cut from I -in. board. A slot to receive the 

 square head-locking bolt is cut in the center 

 block. The center block may be bored to 

 receive the tail-spindle or it may be made 

 of two sections as shown. The tail-spindle 

 is a ^-in. square head-bolt about 10 in. 



long. The hand wheel for the tail-spindle 



is made of two ^ by 3-in. wood wheels 

 nailed together. One of these is bored to 

 receive the bolt, and square recesses are 

 cut into the inner faces of the wheels to 

 receive the head of the bolt. Screwed to 

 the tail-stock are two iron pieces, each 

 3 in. long, I in. wide and ^ in. thick. One 

 of these is drilled and threaded to receive 

 the threaded end of the bolt, and the other 



FROKT OF JtG-SAW TABUL 



5MW AWIS SCREWED TO 



POST 



WITH 



^3« 



CENTER SDE CF 



•>. NXX»$OF TAILSnXK 

 XWL STOCK 



SPO^E. OF DfiiVL WHEEL 



BVER MOLD FOR 

 raURMGMB8IT 

 METAL COLLAR 

 FOR SPRINKLER 



CENTER UNES OF CRANK-SHAFTS 



Details of the parts for making the jig-saw and tool-rest 

 attachment and curves for crank-shaft of two lathes 



piece is drilled the full diameter of the bolt. 

 A hand-wheel, bolt and nut are used for 

 locking the tail-spindle. The head of this 

 bolt is recessed into the hand-wheel in the 

 manner described for the spindle-bolt. It 

 may be necessary to cut the thread of the 

 tail-bolt somewhat longer than the thread 

 found upon it. The end of the bolt is 

 filed to a conical ix)int. 



A spur center is made by screwing a 

 3 or 4-in. wood wheel to the face-plate, 

 passing the screws through the wood into 

 the holes in the face-plate. The heads of 

 the screws must be countersunk into the 

 wood. Reverse the position of the tool- 

 rest, turn the lathe and mark the exact 

 center of the wheel. Drive a nail for a 

 center spur, file it and break off surplus 



