Try going part way in with your tool, then back out, slide the parting tool, over a bit to make the groove wider. You make be getting a lot of side friction. May be basic info, but on deep cuts, it is hyper-critical to make sure that the blade is perfect in alignment.
As mentioned above, good steady feed.
I have made 3 to 4 in. cuts on my old Atlas (lantern style) at 500 rpm. On my SB Heavy 10, it is a breeze
As mentioned above, good steady feed.
I have made 3 to 4 in. cuts on my old Atlas (lantern style) at 500 rpm. On my SB Heavy 10, it is a breeze