ORIGINAL: nitro joe
Could one of the members who are machinist's answer a basic question for me?
I was reading a thread at another group and see that there is at least one. (I am not) that also posts over here.(I have a FMA Co-Pilot to liquidate at some point, btw...)
http://www.rcgroups.com/forums/showthread.php?t=837543
I have an Echo cylinder with the fins turned off.
The OD T.I.R is within .0005” which is just peachy.
The trouble, is that I’ve managed to turn a taper of
About .0025” within a space of 1.570”.(mandrel to cyl.fit too loose)
The amount of stock I left to play with is only ~.010”
Maybe a tad more,What are my options…?
Nitro, I do not quite understand your problem. Can you please rephrase? the T.I.R. part, your mandrel fit , the stock to play with, and where the taper is?
I am trying to visualize what I would do, but I cannot quite follow your use of the lathe, and materials. Please do not use abbrevations. English is not my native language.
edit:
If I understand your post well:
I would use a mandrel with straight fit section and with a slight taper in the end, just enough to hold the cylinder tight. As emergency measure, a dab of hot melt could secure the cylinder to the mandrel, that should stay in the lathe, or be scrapped.