machining horizontal surface

machining vertical surface

machining angular surface

all of these

L-type slots

T-type slots

I-type slots

nay one of these

stroke length

motor power

mass of machine

rate size

increasing the centre distance of bull gear and crank pin

decreasing the centre distance of bull gear and crank pin

increasing the length of the arm

decreasing the length of the slot in the slotted lever

to produce good surface finish and high degree of accuracy

to remove considerable amount of metal without regard to accuracy of the finished surface

to grind exterior cylindrical surfaces

any one of the above