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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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Boring a taper
I've been practicing boring a MT #1 with the compound on my Sherline lathe.
The results, after 4 tries are pretty dismal to say the least. The compound was set against a standard MT by feeling the taper and setting it for constant drag on a piece of paper, through the length of taper. The material is 12 L 14. Each attempt resulted in a taper alright, and one that would lock, but there would be a lot of runout depending on how carefully I positioned a test taper in the new socket. It appears the taper (socket) is a loose fit on the small end. I expect the taper male to fit solidly in the socket and be automatically aligned straight with just a tap from a plastic hammer. Not the case. Any suggestionss - please. Is there a better way than "feeling up" an accurate standard taper, like I'm doing. So far I haven't tried the chalk or layout blue method of determining fit. The throw is so short that there is only a very small window of adjustment on a MT #1. Bob Swinney |
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