What does chip load (CL) represent in milling?

What does chip load (CL) represent in milling?

• A. Chip length
• B. Chip load or feed per tooth
• C. Cutter length
• D. Clearance

Answer: (B)

Chip load is the thickness of material removed by each flute of the milling cutter as it advances—essentially the feed per tooth. In milling, each tooth takes a small bite of material, and the size of that bite, or chip, per tooth defines the chip load. This value links to the overall feed rate through Vf = fz × z × rpm, where fz is the chip load (feed per tooth), z is the number of flutes, and rpm is the spindle speed. Choosing the right chip load matters: too large a chip load increases cutting forces and heat and can shorten tool life or cause breakage; too small a chip load leads to rubbing, built-up heat, and a poorer surface finish. The other terms—chip length, cutter length, and clearance—refer to different concepts (chip length is not the standard term for cutting per tooth; cutter length is the tool’s physical length; clearance relates to relief or gap) and don’t describe the material removed per tooth.

Chip load is the thickness of material removed by each flute of the milling cutter as it advances—essentially the feed per tooth. In milling, each tooth takes a small bite of material, and the size of that bite, or chip, per tooth defines the chip load. This value links to the overall feed rate through Vf = fz × z × rpm, where fz is the chip load (feed per tooth), z is the number of flutes, and rpm is the spindle speed. Choosing the right chip load matters: too large a chip load increases cutting forces and heat and can shorten tool life or cause breakage; too small a chip load leads to rubbing, built-up heat, and a poorer surface finish. The other terms—chip length, cutter length, and clearance—refer to different concepts (chip length is not the standard term for cutting per tooth; cutter length is the tool’s physical length; clearance relates to relief or gap) and don’t describe the material removed per tooth.