I wanted to check with you guys who have more experience with shapers.
I have a South Bend 7” shaper and I’m uncertain about how accurate a small shaper like this is capable of cutting.
On a 4” long cut on hot rolled 1018 steel, cutting .020 deep at a .006 feed, I get a taper of about 2 thousandths front to back. ( larger at front-smaller at rear). If I then follow up with a “spring cut” it trues up the part to under 1/2 thousandths of a taper. I notice some variance in the amount of taper based on how deep I set the shaper to cut. Deeper the cut , the more the taper. Should I just expect this? Or is this more of a taper than you get on your machine?
I’m not asking how to make it cut more accurate but instead unsure if the results I’m getting are in the normal or typical range for this size machine doing that deep of a cut.
My prior experience is only on a old worn lathe and it often requires a spring cut to true up the part.
Pete
I have a South Bend 7” shaper and I’m uncertain about how accurate a small shaper like this is capable of cutting.
On a 4” long cut on hot rolled 1018 steel, cutting .020 deep at a .006 feed, I get a taper of about 2 thousandths front to back. ( larger at front-smaller at rear). If I then follow up with a “spring cut” it trues up the part to under 1/2 thousandths of a taper. I notice some variance in the amount of taper based on how deep I set the shaper to cut. Deeper the cut , the more the taper. Should I just expect this? Or is this more of a taper than you get on your machine?
I’m not asking how to make it cut more accurate but instead unsure if the results I’m getting are in the normal or typical range for this size machine doing that deep of a cut.
My prior experience is only on a old worn lathe and it often requires a spring cut to true up the part.
Pete