What is the difference between Climb and Conventional Milling?

Reference › Glossary › Climb vs Conventional Milling

Comparison

Climb vs Conventional Milling

What's the difference?

The two ways a milling cutter can engage the work, defined by whether the cutter spins with or against the feed.

Climb (down) milling

Tooth starts at full chip thickness and exits thin; better finish and tool life, pushes work into the fixture. The default on rigid, backlash-free CNC machines.

Conventional (up) milling

Tooth starts at zero thickness and rubs before biting; tolerates backlash and hard skin, which suited older manual machines.

Bottom line

On a modern CNC with tight ballscrews, climb mill for finish and tool life. Conventional milling is mainly for worn or manual machines with backlash, or cutting through hard scale.

Full definitions

Climb Milling

Processes

Conventional Milling

Processes

Backlash

Precision

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