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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#41
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Square holes in a round bar.
On 03/18/2012 10:02 AM, Tim Wescott wrote:
On Sat, 17 Mar 2012 13:41:59 -0700, whit3rd wrote: On Thursday, March 15, 2012 8:54:15 AM UTC-7, Tim Wescott wrote: How would one make nice sharp-cornered, clean-sided (I'm not sure of the surface finish, but mirror-bright would be nice) square holes, about 0.1" on the sides, off center from the axis of the bar (so not square to the bar surface), in a round steel bar about 0.75" in diameter? Why not mill a square slot in the end of the bar, then attach a cap? It's certainly easy to do, and the bar is big enough to take a variety of cap-fastening schemes (weld, rivet, bolt, pin, threaded section). Because when I'm done making the holes, I'm going to bore the bar into a tube with 50-mil thick walls. This could still work. Cut the bar into two pieces, on an angle, mill your slot at the end of one piece, furnace braze the other piece onto the one with the square slot, and hone to fit. Probably could get away with silver solder and a propane torch to join the parts... Bill |
#42
Posted to rec.crafts.metalworking
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Square holes in a round bar.
On Sun, 18 Mar 2012 10:59:14 -0700, Bill Martin wrote:
On 03/18/2012 10:02 AM, Tim Wescott wrote: On Sat, 17 Mar 2012 13:41:59 -0700, whit3rd wrote: On Thursday, March 15, 2012 8:54:15 AM UTC-7, Tim Wescott wrote: How would one make nice sharp-cornered, clean-sided (I'm not sure of the surface finish, but mirror-bright would be nice) square holes, about 0.1" on the sides, off center from the axis of the bar (so not square to the bar surface), in a round steel bar about 0.75" in diameter? Why not mill a square slot in the end of the bar, then attach a cap? It's certainly easy to do, and the bar is big enough to take a variety of cap-fastening schemes (weld, rivet, bolt, pin, threaded section). Because when I'm done making the holes, I'm going to bore the bar into a tube with 50-mil thick walls. This could still work. Cut the bar into two pieces, on an angle, mill your slot at the end of one piece, furnace braze the other piece onto the one with the square slot, and hone to fit. Probably could get away with silver solder and a propane torch to join the parts... I think I'd rather file, or stick with round holes. You're probably correct that a brazed joint would hold together well -- it just seems to be a weird thing to do. -- My liberal friends think I'm a conservative kook. My conservative friends think I'm a liberal kook. Why am I not happy that they have found common ground? Tim Wescott, Communications, Control, Circuits & Software http://www.wescottdesign.com |
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