radical 



A HOME-MADE POWER HACK SAW 



By Ray F. Kuns. 



The power hack saw is a well-known 

 time, labor and material saver. The ma- 

 chine illustrated will cut anything which 

 can be held in the vise, from thin brass 

 tubing up to four-inch solid bar. The 

 feed is automatic and may be varied by 

 means of the sliding weight to suit the 

 cut being made. Once correctly adjusted 

 the machine needs no further attention 

 until the cut is finished. 



The wheels, frame, carriage, vise jaws 

 and other wood parts are made from oak, 



BEARING SUPPORT : Two of these are 

 required. Refer to page 349 for detail and 

 to B S, below, for the location on the 

 base. The hole may be bored with one 

 inch auger bit and used for the bearing, 

 or it may be worked out larger and 

 bushed or babbitted. The hard wood 

 bearings will run quite a while, even for 

 continuous use, in a machine of this kind, 

 since it should run but forty-five strokes 

 per minute. The support is fastened to 

 the base by means of bolts or lag screws. 



POWER HACK SAW 



maple or other hard wood. The metal 

 parts are mostly of mild steel, excepting, 

 of course, the cold rolled shaft and the 

 vise screw. Inasmuch as there are no 

 hard joints to make, the wood parts may 

 be very quickly gotten out and fastened 

 together. 



BASE: Use one solid piece for the 

 base, working out approximately to the 

 size suggested. 



TABLE : Get out the table top and sup- 

 ports, shown on page 349, and fasten 

 them together with nails or screws. Se- 

 cure the supports to the base by means 

 of nails or lag screws. The supports 

 may be braced to make the table more 

 rigid. 



VISE: Four jaws are required for 

 this, the detail of which is shown on page 

 349. The two back jaws are held firmly in 



348 



