Three methods. Gear head lathe, pipe threader,or large gear reducer. Start with a chunk of rd. bar, 2.5" long,2-2.5"O.D. Bore a .5" hole in center in lathe. Or whatever size picket you want to twist. I have 7/16,1/2,5/8, and 3/4. Take chunk from lathe to milling machine. Mill slot so that drilled hole disapears. Carefully finnish work end with file and sandpaper. Grip in lathe or pipe threading machine. For use in the lathe, you must make a stand that clamps to the ways, with a slot in the top to hold the bar. This must line up very well with the center of the chuck. Pipe threader must be clamped or bolted to bench top. Work is held by a vice clamped to the bench on sufficient spacers. To use a gear reducer, it must have a high numerical reduction, or be driven by reducing sprocket or pulley set up. The 2.5" long chunk must be 4" long or more and first be bored and keyed to go on output shaft of gear-reducer. Presently I am building a twister to do 1.25" square steel, cold. John Christiansen
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Picket Twister
Three methods. Gear head lathe, pipe threader,or large gear reducer. Start with a chunk of rd. bar, 2.5" long,2-2.5"O.D. Bore a .5" hole in center in lathe. Or whatever size picket you want to twist. I have 7/16,1/2,5/8, and 3/4. Take chunk from lathe to milling machine. Mill slot so that drilled hole disapears. Carefully finnish work end with file and sandpaper. Grip in lathe or pipe threading machine. For use in the lathe, you must make a stand that clamps to the ways, with a slot in the top to hold the bar. This must line up very well with the center of the chuck. Pipe threader must be clamped or bolted to bench top. Work is held by a vice clamped to the bench on sufficient spacers. To use a gear reducer, it must have a high numerical reduction, or be driven by reducing sprocket or pulley set up. The 2.5" long chunk must be 4" long or more and first be bored and keyed to go on output shaft of gear-reducer. Presently I am building a twister to do 1.25" square steel, cold. John Christiansen