Originally Posted by jwstolk ..... expect that if i just order plain steel rod, i will get something with very uneven diameter,
and the carige will just jam at some point, and be loose somewhere else.
if i understand correctly this is the same for cols and hot rolled bar.
i also found something called "cold drawn" bar.
Can anyone tell me what kind of diameter accuracy a can expect from "cold drawn" bar ?
i don't care about absolute diameter or "roundness", as long as it's the same over the
whole length.
jaap. |
You can get bright finish, or ground finish, shaft (C1045) which is ground (I think) to plus nothing minus 0.0005" to the nominal size on diameter and straight to a few thousandths of an inch per foot. It should be available in Europe. Cold rolled steel shaft (CRS) (C1018) is normally within less than 0.001" to the nominal size and is often straight to better than 0.01" per foot. If you have access to a lathe, dial indicator and an acetylene torch it is possible to straighten CRS to within about 0.005" per foot with a bit of practice.