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T M S powerful --ollsaw cuts1%-in. stock wi th ease at1,400 strokes per minute,-and isdesigned to be used with eitherthe heavy saber-type of bladesor the finest jewelers' blades. Ifyou have an old sewing-machinehead and a +hp. motor, the to-tal cost should not exceed $5.THe sewing-machine head isadapted to its new use by firstremoving the needle shaft andholder and substituting a bladeholder, @e head is then invert- I - /'d and securely bolted between $ - - --two lengths of 2 by 4-in. mapleWhich are supborted on two hardwood table of %-in. hardwood is made to fit overblocks bolted either to a separate base or and around thebase of the sewing-machinedirectly to the bench top. Due to varia- head. It is covered with a 10 by 20;in.tions in the size and needle stroke of did- plate of No. 12-gauge aluminum. A %-in.ferent types of sewing-machine heads, hole is drilled in the plate to form anslight alterations may be found necessary opening for the blade. The upper slidewhen assembling, and for this reason some shaft, or plunger, is made from a 9-in.of the dimensions have been omitted as length of %-in. seamless-steel or brass,they depend on the particular installation tubing. The lower end i~ bushed with nyou will use. piece of brass tubing soldered in place andPipe and fittings are used for the frame. tapped to take a 1%-in. length of %-in.When wembling it, the joints should be bolt. The shaft guide is then drilled asturned in as tightly as possible. The flange shown. It is held against the end of theis murely bolted to the base. A saw tubing with a thin nut. A wooden disk,

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I-ub. The rubber hose is led fromthe blower through the frthe nozzle as shown.Stepped Bushing Driver HaFor Various Sizesger.as- piece of flat steel,

the other end issawed in steps,p rog r e s s i v e l y