Correct option is A
In
down milling (also known as
climb milling), the workpiece is fed in the
same direction as the rotating cutter at the point of contact.
Key Characteristics of Down Milling:
· The cutter teeth engage the workpiece at the
thickest part of the chip and exit at the
thinnest part.
· The
cutting force pushes the workpiece downward against the machine table, ensuring better stability.
· Produces
better surface finish due to minimal rubbing and reduced friction.
·
Tool life is improved because the cutting forces are more favorable.
· Requires a machine with
high rigidity to counteract the pulling action on the workpiece.
