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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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#1
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boring oversize parts
I have an aluminum tube that I need to bore about 1" at end out to at
least 5.57" -- it varies from about 5.47" to about 5.60". Unfortunately, this is too big to put on my Sherline lathe--it won't fit onto the outside of chuck that I can find for the Sherline. I have this vague notion that there might be some way to do this by putting an end mill in the headstock and rotating the workpiece so that the end mill removes a fairly consistent layer. This doesn't have to be spectacularly precise. I tried this approach, and except that I couldn't figure out a way to get the workpiece to turn consistently (since it wasn't supported), it almost seemed to work. Does anyone have any clever ways to do what I am trying to do, without breaking down and buying a bigger lathe? Some clever way to mount the tube on a 3.5" OD chuck, for example? |
#2
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boring oversize parts
wrote in message ... I have an aluminum tube that I need to bore about 1" at end out to at least 5.57" -- it varies from about 5.47" to about 5.60". Unfortunately, this is too big to put on my Sherline lathe--it won't fit onto the outside of chuck that I can find for the Sherline. I have this vague notion that there might be some way to do this by putting an end mill in the headstock and rotating the workpiece so that the end mill removes a fairly consistent layer. This doesn't have to be spectacularly precise. I tried this approach, and except that I couldn't figure out a way to get the workpiece to turn consistently (since it wasn't supported), it almost seemed to work. Does anyone have any clever ways to do what I am trying to do, without breaking down and buying a bigger lathe? Some clever way to mount the tube on a 3.5" OD chuck, for example? One piece? Buy a bigger lathe...farm it out...Buy a bigger lathe...farm it out...Buy a bigger lathe...farm it out...Hmmmm. |
#3
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boring oversize parts
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#4
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boring oversize parts
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#6
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boring oversize parts
On May 7, 8:08 pm, wrote:
I have an aluminum tube that I need to bore about 1" at end out to at least 5.57" -- it varies from about 5.47" to about 5.60". Unfortunately, this is too big to put on my Sherline lathe--it won't fit onto the outside of chuck that I can find for the Sherline. Dangerous way follows: Make a spacer to fit between your internal jays, and the tube. Get a piece of 3/4" hardwood, maybe 6" x 6". Center drill it. Bandsaw it oversize to fit into your tube. Using the tailstock to press the part against a chuck face, turn the OD to just fit inside the tube. Now bore the part to fit over your chuck jaws, being careful NOT to break thru until the final pass. Split the ring in one place. Install wood adapter over jaws, tube over adapter, tighten, dial indicate OD or ID, TIGHTEN. Turn slowly, light cuts. Duck, cuss, clean shorts. |
#7
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boring oversize parts
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