Milling nomenclature: “Down milling” is commonly referred to by which other name in manufacturing practice?

Introduction / Context:
Understanding climb (down) versus conventional (up) milling is essential for choosing feed direction, chip thickness progression, surface finish, tool life, and fixture design. The question tests terminology and associated process awareness.

Given Data / Assumptions:

• Peripheral milling on a horizontal or vertical machine.
• Workpiece feed direction either with or against the cutter rotation at the contact point.
• Proper machine backlash control assumed for climb milling.

Concept / Approach:
In climb (down) milling, the cutter rotation and table feed are in the same direction at the engagement zone, so chip thickness starts at maximum and reduces to zero at exit. This tends to push the work into the table, improves surface finish, and reduces rubbing. Conventional (up) milling is opposite.

Step-by-Step Solution:

Verification / Alternative check:
Chip thickness progression diagrams show maximum-to-zero in climb versus zero-to-maximum in conventional; this confirms the naming convention.

Why Other Options Are Wrong:
End and face milling describe tool geometry and operation type, not feed direction; conventional milling is the opposite of down (climb) milling; slot milling is a specific feature operation.

Common Pitfalls:
Attempting climb milling on worn machines with backlash—this can pull the table suddenly and damage the job or tool.

Final Answer:
Climb milling