The work axis is kept out of alignment with the lathe axis and the tool movement is parallel to lathe axis

The work axis is kept in line with the lathe axis and the tool is made to move at an angle to lathe axis

The live and dead centres are moved in opposite directions to keep the work axis out of alignment with the lathe axis

The lathe axis is kept out of alignment with the work axis and the tool is made to move at an angle to the lathe axis

1 in 10

1 in 15

1 in 20

1 in 25

convex shaped

concave shaped

slightly tapered with smaller end towards work face

slightly tapered with smaller end towards turret face