"Dave Hinz" wrote in message
...
On Thu, 20 Jan 2005 05:16:33 GMT, SteveF wrote:
Let's say I have a small lathe (length) and need to make a threaded screw
longer than the max length of my lathe. Obviously this can be done in
theory by just threading one part, removing from the chuck, reinserting
further back in the headstock and continuing the thread. But in practice
can this be done with enough accuracy for something like a replacement
lead
screw for a lathe? Yes, I am aware of parts on Ebay and long threaded
rods
from MSC, etc. - this is more of a "how to use my lathe" machining
question.

Can you use the lathe to turn the stock, and use a die to cut your
threads, or is this for a thread you don't have a die for? Novice
question
on my own part as well.


Well, that gives me two more questions for the group.

One - Assuming some experience on the part of the operator in cutting
threads and a good lathe, how much less accurate is using a die than cutting
with the lathe?

Two - How could one measure the thread to thread distance accurately to see
how much error was created when reindexing after moving? Looks like thread
micrometers only measure the diameter.

Steve.