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Thread: 1018 or 4140 for crossfeed?
03-12-2009, 09:21 AM #1
1018 or 4140 for crossfeed?
In replacing my crossfeed lead screw. Do I want to use 1018 carbon steel or heat-treated 4140 alloy steel from McMaster Carr.
03-12-2009, 09:27 AM #2
1045 is in the middle of those 2. I use it for shafting and it's pretty tuff. JC
03-12-2009, 09:35 AM #3
Definitely avoid 1018, if for no other reason than machinability -- it's soft and gummy. I would use 1144 ("Stressproof") for the screw -- moderately hard in the annealed state, stable, and machines like a dream.
03-12-2009, 12:07 PM #4
+1 for 1144SP. Besides being free-machining, it has good wear properties. I did a new crossfeed screw for my Logan, complete with integral feed gear, out of 1144.
03-12-2009, 01:39 PM #5
if you are buying acme screw stock, get the 4140.
03-12-2009, 08:24 PM #6
Thanks guys I don't have the tooling (threading gears or threading dial) and mainly the skill to make the threads. So i'm looking at buying the precision acme threaded rod from McMaster. I wasn't sure if the heat-treat 4140 could be turned down.
Thanks all for the info Clay
03-12-2009, 08:27 PM #7
PM Swells and see if he has any in stock. The Amce LH screw he provided me for my cross slide screw had a much better finish than I could get by turning the threads myself. Gary P. Hansen
03-12-2009, 09:23 PM #8