- Joined
- Nov 14, 2014
- Messages
- 851
anyone have experience turning 4140 with HSS? Iam getting a very rough finish cut turning some 2 1/4” OD 4140 on an old 18”x 72” Cincinnati traytop lathe. The lathe is equipped with an old school lantern tool post.
My finish surface on the 4140 material exhibits a lot of concentric tool marks, maybe 2-3 thou deeper than the rest of the finish surface.
Wondering if 4140 is naturally hard to work with HSS, or my technique is off, or maybe some excessive wear with lead screw not holding the compound and tool assembly rigid enuf???
Anyone offer advice?
Thanks
Glenn
My finish surface on the 4140 material exhibits a lot of concentric tool marks, maybe 2-3 thou deeper than the rest of the finish surface.
Wondering if 4140 is naturally hard to work with HSS, or my technique is off, or maybe some excessive wear with lead screw not holding the compound and tool assembly rigid enuf???
Anyone offer advice?
Thanks
Glenn